Abstract
A spread-spectrum code division multiple access interference canceller for reducing interference in a direct sequence CDMA employed at a base station receiver having N chip-code channels. The interference canceller includes a plurality of correlators or matched filters a plurality of spread-spectrum-processing circuits subtracting circuits and channel correlators or channel-matched filters. Using a plurality of chip-code signals the plurality of correlators despreads the spread-spectrum CDMA signal as a plurality of despread signals respectively. The spread-spectrum-processing circuits use a timed version of the chip-code signals for spread-spectrum processing the despread signals respectively with a chip-code-signal corresponding to a respective despread signal. For recovering a code channel using an i th chip-code-signal the subtracting circuits subtracts from the spread-spectrum CDMA signal the N-1 spread-spectrum-processed-despread signals generating a subtracted signal. The N-1 spread-spectrum-processed-despread signals exclude the spread-spectrum-processed-despread signal of the i th channel. The channel correlator or channel-matched filter despreads the subtracted signal.
| Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
|---|---|---|---|---|---|---|---|---|---|
| Declaration Date | Declaration Reference | Declaring Company | Specification Number | ||||||
| Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC | No | Family Member | ||||
| 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
Specification Information
Specification Information
Technologies
Family Information
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
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| WO9603819A1 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
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| US5719852A | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
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Yes | Basis Patent | |||
| US5719852A | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
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| FI970276A | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| FI970276A | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| FI970276A | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| FI117612B | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| FI117612B | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| FI117612B | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| FI20050232A | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| FI20050232A | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| FI20050232A | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| HK1030697A1 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| HK1030697A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| HK1030697A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| HK1030697A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| HK1030697A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| HK1050965A1 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| HK1050965A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| HK1050965A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| HK1050965A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| HK1050965A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| HK1050966A1 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| HK1050966A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| HK1050966A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| HK1050966A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| HK1050966A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| HK1050967A1 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| HK1050967A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| HK1050967A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| HK1050967A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| HK1050967A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| HK1065190A1 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| HK1065190A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| HK1065190A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| JP3153894B2 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| JP3153894B2 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| JP3153894B2 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| JPH10504429A | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| JPH10504429A | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| JPH10504429A | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| JP2001053721A | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| JP2001053721A | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| JP2001053721A | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| JP2001053721A | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| JP2001053721A | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| JP3377983B2 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| JP3377983B2 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| JP3377983B2 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| JP3377983B2 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| JP3377983B2 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| MX9700522A | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| MX9700522A | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| MX9700522A | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| MX9700522A | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| MX9700522A | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| NZ290723A | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
Yes | Basis Patent | |||
| NZ290723A | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| NZ290723A | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| NZ290723A | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| NZ314383A | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
Yes | Basis Patent | |||
| NZ314383A | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| NZ314383A | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| NZ314383A | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| SE521137C2 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| SE521137C2 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| SE521137C2 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| SE9700184L | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| SE9700184L | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| SE9700184L | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| SE0302105L | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| SE0302105L | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| SE0302105L | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| SE0302105L | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| SE0302105L | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| SE527579C2 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| SE527579C2 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| SE527579C2 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| SE527579C2 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| SE527579C2 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| SE528965C2 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| SE528965C2 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| SE528965C2 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| SE0700241L | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| SE0700241L | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| SE0700241L | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| SE532857C2 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| SE532857C2 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| SE532857C2 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| SE0702343L | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| SE0702343L | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| SE0702343L | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| SE532856C2 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| SE532856C2 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| SE532856C2 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US5553062A | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
Yes | Basis Patent | |||
| US5553062A | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| US5553062A | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US5553062A | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US6259688B1 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| US6259688B1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US6259688B1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US6259688B1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US6259688B1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US2001019548A1 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| US2001019548A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US2001019548A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US2001019548A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US2001019548A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US6868076B2 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| US6868076B2 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US6868076B2 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US6868076B2 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US6868076B2 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US2002172171A1 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| US2002172171A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US2002172171A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US2002172171A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US2002172171A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US7164668B2 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| US7164668B2 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US7164668B2 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US7164668B2 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US7164668B2 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US2002172172A1 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| US2002172172A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US2002172172A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US2002172172A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US2002172172A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US7161919B2 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| US7161919B2 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US7161919B2 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US7161919B2 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US7161919B2 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US2002172173A1 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| US2002172173A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US2002172173A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US2002172173A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US2002172173A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US7167464B2 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| US7167464B2 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US7167464B2 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US7167464B2 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US7167464B2 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US2002167925A1 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| US2002167925A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US2002167925A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US2002167925A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US2002167925A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US7167462B2 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| US7167462B2 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US7167462B2 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US7167462B2 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US7167462B2 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US2003002463A1 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| US2003002463A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US2003002463A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US2003002463A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US2003002463A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US6876665B2 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| US6876665B2 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US6876665B2 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US6876665B2 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US6876665B2 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US2002191571A1 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| US2002191571A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US2002191571A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US2002191571A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US2002191571A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US2002196757A1 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| US2002196757A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US2002196757A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US2002196757A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US2002196757A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US7230938B2 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| US7230938B2 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US7230938B2 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | Yes | Basis Patent | ||||
| US7230938B2 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US7230938B2 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US2005157743A1 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| US2005157743A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US2005157743A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US7027423B2 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| US7027423B2 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US7027423B2 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US2007258412A1 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| US2007258412A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| US2007258412A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| HK1066657A1 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| HK1066657A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| HK1066657A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| HK1066945A1 | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| HK1066945A1 | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| HK1066945A1 | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| BR9508348A | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| BR9508348A | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| BR9508348A | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| CN1097368C | Not Available | 09/04/2001 | ISLD-200105-001 | INTERDIGITAL INC |
S1
|
No | Family Member | |||
| CN1097368C | 3G | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
| CN1097368C | Not Available | 07/04/2004 | ISLD-200407-004 | INTERDIGITAL INC | No | Family Member | ||||
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies
Multiple access
Product
Use Cases
Services
Claim
1. A base station spread-spectrum code division multiple access (CDMA) interference canceller for reducing interference in a received spread-spectrum CDMA signal having N channels, with each of the N channels identified by a distinct chip-code signal, comprising:
a plurality of means for generating a plurality of chip-code signals;
a plurality of despreading means, with each of said despreading means responsive to the respective distinct chip-code signal identifying a corresponding one of the N channels, for simultaneously despreading a plurality of spread-spectrum channels of a spread-spectrum CDMA signal as a plurality of despread signals, respectively;
a plurality of delay means providing proper timing for the plurality of chip-code signals;
a plurality of means, responsive to the plurality of delayed chip-code signals, for simultaneously spread-spectrum processing the plurality of despread signals, respectively, with a chip-code-signal corresponding to a respective despread signal;
means, for an ith chip-code signal, for simultaneously subtracting from the spread-spectrum CDMA signal, each of Nâx88x921 spread-spectrum-processed-despread signals, with the Nâx88x921 spread-spectrum-processed-despread signals excluding a spread-spectrum processed-despread signal of the ith despread signal, thereby generating a subtracted signal; and
channel means for despreading the subtracted signal with the ith chip-code signal as an ith channel.', 'a plurality of means for generating a plurality of chip-code signals;', 'a plurality of despreading means, with each of said despreading means responsive to the respective distinct chip-code signal identifying a corresponding one of the N channels, for simultaneously despreading a plurality of spread-spectrum channels of a spread-spectrum CDMA signal as a plurality of despread signals, respectively;', 'a plurality of delay means providing proper timing for the plurality of chip-code signals;', 'a plurality of means, responsive to the plurality of delayed chip-code signals, for simultaneously spread-spectrum processing the plurality of despread signals, respectively, with a chip-code-signal corresponding to a respective despread signal;', 'means, for an ith chip-code signal, for simultaneously subtracting from the spread-spectrum CDMA signal, each of Nâx88x921 spread-spectrum-processed-despread signals, with the Nâx88x921 spread-spectrum-processed-despread signals excluding a spread-spectrum processed-despread signal of the ith despread signal, thereby generating a subtracted signal; and', 'channel means for despreading the subtracted signal with the ith chip-code signal as an ith channel.
2. The base station canceller of claim 1 wherein each of said plurality of despreading means includes:
a filter;
a chip-code generator for generating a chip-code signal from a respective chip codeword; and
a mixer coupled between said filter and said chip-code generator.', 'a filter;', 'a chip-code generator for generating a chip-code signal from a respective chip codeword; and', 'a mixer coupled between said filter and said chip-code generator.
3. The base station canceller of claim 2 wherein said channel means includes:
a filter;
a chip-code generator for generating a chip-code signal from a chip codeword corresponding to the ith channel; and
a mixer coupled between said filter and said chip-code generator.', 'a filter;', 'a chip-code generator for generating a chip-code signal from a chip codeword corresponding to the ith channel; and', 'a mixer coupled between said filter and said chip-code generator.
4. The base station canceller of claim 1 wherein each of said plurality of despreading means includes a matched filter having an impulse response matched to a respective chip code-word.
5. The base station canceller of claim 3 wherein said channel means includes:
a filter;
a chip-code generator for generating a chip-code signal from a chip codeword corresponding to the ith channel; and
a mixer coupled between said filter and said chip-code generator.', 'a filter;', 'a chip-code generator for generating a chip-code signal from a chip codeword corresponding to the ith channel; and', 'a mixer coupled between said filter and said chip-code generator.
6. The base station canceller of claim 4 wherein said channel-despreading means includes a matched filter having an impulse response matched to a chip codeword corresponding to the ith channel.
7. The base station canceller of claim 1 wherein said channel means includes:
a filter;
a chip-code generator for generating a chip-code signal from a chip codeword corresponding to the ith channel; and
a mixer coupled between said filter and said chip-code generator.', 'a filter;', 'a chip-code generator for generating a chip-code signal from a chip codeword corresponding to the ith channel; and', 'a mixer coupled between said filter and said chip-code generator.
8. The base station canceller of claim 1 wherein each of said despreading means includes a digital signal processor with a digital filter having an impulse response matched to a respective chip codeword.
9. The base station canceller of claim 8 wherein said channel-despreading means includes a matched filter having an impulse response matched to a chip codeword corresponding to the ith channel
10. The base station canceller of claim 8 wherein said channel-despreading means includes a surface acoustic wave (SAW) device having an impulse response matched to a chip codeword corresponding to the ith channel
11. The base station canceller of claim 1 wherein said channel-despreading means includes a digital signal processor with digital matched filter having an impulse response matched to a chip codeword corresponding to the ith channel
12. The base station canceller of claim 1 wherein each of said plurality of despreading means includes a surface acoustic wave (SAW) device having an impulse response matched to a chip codeword corresponding to the ith channel
13. The base station canceller of claim 12 wherein said channel despreading means includes a matched filter having an impulse response matched to a chip codeword corresponding to the ith channel
14. The base station canceller of claim 12 wherein said channel despreading means includes a chip-code generator for generating a chip-code signal from a digital matched filter having an impulse response matched to a chip codeword corresponding to the ith channel
15. The base station canceller of claim 12 wherein said channel despreading means includes a surface acoustic wave (SAW) device having an impulse response matched to a chip codeword corresponding to the ith channel
16. A base station spread-spectrum code division multiple access (CDMA) interference canceller for reducing interference in a received spread-spectrum CDMA signal having N channels, with each of the N channels identified by a distinct chip-code signal, comprising:
a plurality of chip-code-signal generators for generating, simultaneously, a plurality of chip-code signals;
a plurality of correlators, responsive to a plurality of distinct chip-code signals, for simultaneously despreading a plurality of spread-spectrum channels of a spread-spectrum CDMA signal as a plurality of despread signals, respectively;
a plurality of delay devices coupled to said plurality of chip-code signal generators to provide proper timing for the plurality of chip-code signals as a timed plurality of chip-code signals, respectively;
a plurality of mixers, responsive to the timed plurality of chip-code signals, for simultaneously spread-spectrum processing, the plurality of despread signals, respectively, with a chip-code-signal corresponding to a respective despread signal;
a subtractor, for an ith chip-code signal, for simultaneously subtracting from the spread-spectrum CDMA signal, each of the Nâx88x921 spread-spectrum-processed-despread signals, with the Nâx88x921 spread-spectrum-processed-despread signals, excluding a spread-spectrum processed despread signal of the ith despread signal, thereby generating a subtracted signal; and
a channel correlator for despreading the subtracted signal with the ith chip-code signal as an ith channel.', 'a plurality of chip-code-signal generators for generating, simultaneously, a plurality of chip-code signals;', 'a plurality of correlators, responsive to a plurality of distinct chip-code signals, for simultaneously despreading a plurality of spread-spectrum channels of a spread-spectrum CDMA signal as a plurality of despread signals, respectively;', 'a plurality of delay devices coupled to said plurality of chip-code signal generators to provide proper timing for the plurality of chip-code signals as a timed plurality of chip-code signals, respectively;', 'a plurality of mixers, responsive to the timed plurality of chip-code signals, for simultaneously spread-spectrum processing, the plurality of despread signals, respectively, with a chip-code-signal corresponding to a respective despread signal;', 'a subtractor, for an ith chip-code signal, for simultaneously subtracting from the spread-spectrum CDMA signal, each of the Nâx88x921 spread-spectrum-processed-despread signals, with the Nâx88x921 spread-spectrum-processed-despread signals, excluding a spread-spectrum processed despread signal of the ith despread signal, thereby generating a subtracted signal; and', 'a channel correlator for despreading the subtracted signal with the ith chip-code signal as an ith channel.17. A base station spread-spectrum code division multiple access (CDMA) interference canceller for reducing interference in a received spread-spectrum CDMA signal having N chip-code channels, with each of the N channels identified by a distinct chip-code signal, comprising:
a plurality of matched filters, responsive to a plurality of distinct chip-code signals, for simultaneously despreading a plurality of spread-spectrum channels of a spread-spectrum CDMA signal as a plurality of despread signals, respectively;
a plurality of chip-code-signal generators, responsive to a plurality of despread signals from the plurality of matched filters, for generating a timed plurality of chip-code signals, respectively;
a plurality of mixers, responsive to the plurality of despread signals from the plurality of matched filters and the timed plurality of chip-code signals from the plurality of chip-code-signal generators, respectively, for spread-spectrum processing, simultaneously, the plurality of despread signals, respectively, with a timed chip-code signal corresponding to a respective despread signal;
a subtractor, for an ith chip-code signal, for subtracting from the spread-spectrum CDMA signal, simultaneously, each of the Nâx88x921 spread-spectrum-processed-despread signals, with the Nâx88x921 spread-spectrum-processed-despread signals not including a spread-spectrum processed despread signal of the ith despread signal, thereby generating a subtracted signal; and
a channel matched filter for despreading the subtracted signal with the ith chip-code signal as an ith channel.', 'a plurality of matched filters, responsive to a plurality of distinct chip-code signals, for simultaneously despreading a plurality of spread-spectrum channels of a spread-spectrum CDMA signal as a plurality of despread signals, respectively;', 'a plurality of chip-code-signal generators, responsive to a plurality of despread signals from the plurality of matched filters, for generating a timed plurality of chip-code signals, respectively;', 'a plurality of mixers, responsive to the plurality of despread signals from the plurality of matched filters and the timed plurality of chip-code signals from the plurality of chip-code-signal generators, respectively, for spread-spectrum processing, simultaneously, the plurality of despread signals, respectively, with a timed chip-code signal corresponding to a respective despread signal;', 'a subtractor, for an ith chip-code signal, for subtracting from the spread-spectrum CDMA signal, simultaneously, each of the Nâx88x921 spread-spectrum-processed-despread signals, with the Nâx88x921 spread-spectrum-processed-despread signals not including a spread-spectrum processed despread signal of the ith despread signal, thereby generating a subtracted signal; and', 'a channel matched filter for despreading the subtracted signal with the ith chip-code signal as an ith channel.18. A base station spread-spectrum code division multiple access (CDMA) interference canceller for reducing interference in a received spread-spectrum CDMA signal having N channels, with each of the N channels identified by a distinct chip-code signal, comprising:
a plurality of chip-code-signal generators for generating, simultaneously, a plurality of chip-code signals;
a plurality of correlators, responsive to a plurality of distinct chip-code-signals, for simultaneously despreading a plurality of spread-spectrum channels of a spread-spectrum CDMA signal as a plurality of despread signals, respectively;
a plurality of delay devices coupled to said plurality of chip-code signal generators to provide proper timing for the plurality of chip-code signals as a timed plurality of chip-code signals, respectively;
a plurality of mixers, responsive to the timed plurality of chip-code signals, for simultaneously spread-spectrum processing the plurality of despread signals, respectively, with a chip-code-signal corresponding to a respective despread signal, producing N spread-spectrum-processed-despread signals;
a plurality of subtractors, each of said plurality of subtractors for subtracting from the spread-spectrum CDMA signal all but a particular one of the N spread-spectrum-processed-despread signals, with the particular one of the N spread-spectrum-processed-despread signals being different for each of said plurality of subtractors, thereby generating a plurality of subtracted signals; and
a plurality of channel correlators for despreading the plurality of subtracted signals with a particular one of the plurality of chip-code signals, respectively, as a plurality of channels.', 'a plurality of chip-code-signal generators for generating, simultaneously, a plurality of chip-code signals;', 'a plurality of correlators, responsive to a plurality of distinct chip-code-signals, for simultaneously despreading a plurality of spread-spectrum channels of a spread-spectrum CDMA signal as a plurality of despread signals, respectively;', 'a plurality of delay devices coupled to said plurality of chip-code signal generators to provide proper timing for the plurality of chip-code signals as a timed plurality of chip-code signals, respectively;', 'a plurality of mixers, responsive to the timed plurality of chip-code signals, for simultaneously spread-spectrum processing the plurality of despread signals, respectively, with a chip-code-signal corresponding to a respective despread signal, producing N spread-spectrum-processed-despread signals;', 'a plurality of subtractors, each of said plurality of subtractors for subtracting from the spread-spectrum CDMA signal all but a particular one of the N spread-spectrum-processed-despread signals, with the particular one of the N spread-spectrum-processed-despread signals being different for each of said plurality of subtractors, thereby generating a plurality of subtracted signals; and', 'a plurality of channel correlators for despreading the plurality of subtracted signals with a particular one of the plurality of chip-code signals, respectively, as a plurality of channels.19. A base station spread-spectrum code division multiple access (CDMA) interference canceller for reducing interference in a received spread-spectrum CDMA signal having N channels, with each of the N channels identified by a distinct chip-code signal, comprising:
a plurality of chip-code-signal generators for generating, simultaneously, a plurality of chip-code signals;
a plurality of correlators, responsive to a plurality of distinct chip-code-signals, for simultaneously despreading a plurality of spread-spectrum channels of a spread-spectrum CDMA signal as a plurality of despread signals, respectively;
a plurality of delay devices coupled to said plurality of chip-code-signal generators to provide proper timing for the plurality of chip-code signals as a timed plurality of chip-code signals, respectively;
a plurality of mixers, responsive to the timed plurality of chip-code signals, for simultaneously spread-spectrum processing the plurality of despread signals, respectively, with a chip-code signal corresponding to a respective despread signal, producing N spread-spectrum-processed-despread signals;
a first subtractor, for subtracting from the spread-spectrum CDMA signal, all but a first one of the N spread-spectrum-processed-despread signals,
a plurality of chip-code-signal generators, responsive to a plurality of despread signals from the plurality of matched filters, for generating, simultaneously, a timed plurality of chip-code signals, respectively;
a plurality of mixers, responsive to the plurality of despread signals from the plurality of matched filters and the timed plurality of chip-code signals from the plurality of chip-code signal generators, respectively, for simultaneously spread-spectrum processing the plurality of despread signals, respectively, with a timed chip-code signal corresponding to a respective despread signal, producing N spread-spectrum-processed-despread signals;
a plurality of subtractors, each of said plurality of subtractors for subtracting from the spread-spectrum CDMA signal all but a particular one of the N spread-spectrum-processed-despread signals, with the particular one of the N spread-spectrum-processed-despread signals being different for each of said plurality of subtractors, thereby generating a plurality of subtracted signals; and
a plurality of channel-matched filters for despreading the plurality of subtracted signals with a particular one of the plurality of distinct chip-code signals, respectively, as a plurality of channels.', 'a plurality of chip-code-signal generators for generating, simultaneously, a plurality of chip-code signals;', 'a plurality of correlators, responsive to a plurality of distinct chip-code-signals, for simultaneously despreading a plurality of spread-spectrum channels of a spread-spectrum CDMA signal as a plurality of despread signals, respectively;', 'a plurality of delay devices coupled to said plurality of chip-code-signal generators to provide proper timing for the plurality of chip-code signals as a timed plurality of chip-code signals, respectively;', 'a plurality of mixers, responsive to the timed plurality of chip-code signals, for simultaneously spread-spectrum processing the plurality of despread signals, respectively, with a chip-code signal corresponding to a respective despread signal, producing N spread-spectrum-processed-despread signals;', 'a first subtractor, for subtracting from the spread-spectrum CDMA signal, all but a first one of the N spread-spectrum-processed-despread signals,', 'a plurality of chip-code-signal generators, responsive to a plurality of despread signals from the plurality of matched filters, for generating, simultaneously, a timed plurality of chip-code signals, respectively;', 'a plurality of mixers, responsive to the plurality of despread signals from the plurality of matched filters and the timed plurality of chip-code signals from the plurality of chip-code signal generators, respectively, for simultaneously spread-spectrum processing the plurality of despread signals, respectively, with a timed chip-code signal corresponding to a respective despread signal, producing N spread-spectrum-processed-despread signals;', 'a plurality of subtractors, each of said plurality of subtractors for subtracting from the spread-spectrum CDMA signal all but a particular one of the N spread-spectrum-processed-despread signals, with the particular one of the N spread-spectrum-processed-despread signals being different for each of said plurality of subtractors, thereby generating a plurality of subtracted signals; and', 'a plurality of channel-matched filters for despreading the plurality of subtracted signals with a particular one of the plurality of distinct chip-code signals, respectively, as a plurality of channels.
20. A base station spread-spectrum code division multiple access (CDMA) interference canceller for reducing interference in a received spread-spectrum CDMA receiver signal having N channels, with each of the N channels identified by a distinct chip-code signal, comprising:
a plurality of matched filters, responsive to a plurality of distinct chip-code-signals, for simultaneously despreading a plurality of spread-spectrum channels of a spread-spectrum CDMA signal as a plurality of despread signals, respectively;
a plurality of chip-code signal generators, responsive to a plurality of despread signals from the plurality of matched filters, for simultaneously generating a timed plurality of chip-code-signals generators, respectively;
a plurality of mixers, responsive to the plurality of despread signals from the plurality of matched filters and the timed plurality of chip-code signals from the plurality of chip-code-signal generators, respectively, for simultaneously spread-spectrum processing the plurality of despread signals, respectively, with a timed chip-code signal corresponding to a respective despread signal, producing N spread-spectrum-processed-despread signals;
a first subtractor, for subtracting from the spread-spectrum CDMA signal, all but a first one of the N spread-spectrum-processed-despread signals, thereby generating a first subtracted signal;
a second subtractor, for subtracting from the spread-spectrum CDMA signal, all but a second one of the N spread-spectrum-processed-despread signals, thereby generating a second subtracted signal; and
an nth subtractor, for subtracting from the spread-spectrum CDMA signal, all but an nth one of the N spread-spectrum-processed-despread signals, thereby generating an nth subtracted signal;
a first channel-matched filter for despreading the first subtracted signal with a first chip-code signal as an estimate of a first channel;
a second channel-matched filter for despreading the second subtracted signal with a second chip-code signal as an estimate of a second channel; and
an nth channel-matched filter for despreading the nth subtracted signal with an nth chip-code signal as an estimate of an nth channel.', 'a plurality of matched filters, responsive to a plurality of distinct chip-code-signals, for simultaneously despreading a plurality of spread-spectrum channels of a spread-spectrum CDMA signal as a plurality of despread signals, respectively;', 'a plurality of chip-code signal generators, responsive to a plurality of despread signals from the plurality of matched filters, for simultaneously generating a timed plurality of chip-code-signals generators, respectively;', 'a plurality of mixers, responsive to the plurality of despread signals from the plurality of matched filters and the timed plurality of chip-code signals from the plurality of chip-code-signal generators, respectively, for simultaneously spread-spectrum processing the plurality of despread signals, respectively, with a timed chip-code signal corresponding to a respective despread signal, producing N spread-spectrum-processed-despread signals;', 'a first subtractor, for subtracting from the spread-spectrum CDMA signal, all but a first one of the N spread-spectrum-processed-despread signals, thereby generating a first subtracted signal;', 'a second subtractor, for subtracting from the spread-spectrum CDMA signal, all but a second one of the N spread-spectrum-processed-despread signals, thereby generating a second subtracted signal; and', 'an nth subtractor, for subtracting from the spread-spectrum CDMA signal, all but an nth one of the N spread-spectrum-processed-despread signals, thereby generating an nth subtracted signal;', 'a first channel-matched filter for despreading the first subtracted signal with a first chip-code signal as an estimate of a first channel;', 'a second channel-matched filter for despreading the second subtracted signal with a second chip-code signal as an estimate of a second channel; and', 'an nth channel-matched filter for despreading the nth subtracted signal with an nth chip-code signal as an estimate of an nth channel.
21. A base unit having a receiver for recovering data transmitted over a plurality of channels employing a wireless code division multiple access communication technique, the receiver comprising:
a unit for receiving the plurality of channels as a received signal, each channel associated with a code; and
a unit for subtracting for each of the plurality of channels, others of the plurality of channels from the received signal and despreading a result of the subtraction as data for that channel.', 'a unit for receiving the plurality of channels as a received signal, each channel associated with a code; and', 'a unit for subtracting for each of the plurality of channels, others of the plurality of channels from the received signal and despreading a result of the subtraction as data for that channel.
22. The base unit receiver of claim 21 wherein the subtracting unit includes, for each channel:
a unit for despreading the received signal with the others channels codes;
a unit for respreading the despread others channel codes; and
a unit for subtracting from the received signal the respread other channels.', 'a unit for despreading the received signal with the others channels codes;', 'a unit for respreading the despread others channel codes; and', 'a unit for subtracting from the received signal the respread other channels.
23. The base unit receiver of claim 22 wherein the despreading means is a mixer.
24. The base unit receiver of claim 22 wherein the despreading means is a matched filter.
25. A base unit receiver for recovering data transmitted over a plurality of channels employing a wireless code division multiple access communication technique, comprising:
a unit for receiving the plurality of channels as a received signal, each channel associated with a code; and
for each of the plurality of channels, a subtractor for subtracting others of the plurality of channels from the received signal and despreading a result of that subtraction as data for that channel.', 'a unit for receiving the plurality of channels as a received signal, each channel associated with a code; and', 'for each of the plurality of channels, a subtractor for subtracting others of the plurality of channels from the received signal and despreading a result of that subtraction as data for that channel.
26. The base unit receiver of claim 25 further comprising:
for each channel, a first mixer operatively coupled to the input for despreading the received signal with that channel code;
for each channel, a second mixer for respreading that channel despread signal; and
wherein for each channel, the subtractor subtracts from the received signal the respread channels other than that channel.', 'for each channel, a first mixer operatively coupled to the input for despreading the received signal with that channel code;', 'for each channel, a second mixer for respreading that channel despread signal; and', 'wherein for each channel, the subtractor subtracts from the received signal the respread channels other than that channel.
27. The base unit of claim 25 further comprising;
for each channel, a matched filter operatively coupled to the receiving unit for despreading the received signal with that channel code;
for each channel, a mixer for respreading that channel despread signal; and
wherein for each channel, the subtractor subtracts from the received signal the respread channels other than that channel.', 'for each channel, a matched filter operatively coupled to the receiving unit for despreading the received signal with that channel code;', 'for each channel, a mixer for respreading that channel despread signal; and', 'wherein for each channel, the subtractor subtracts from the received signal the respread channels other than that channel.']
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SUMMARY
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Patent number:US6868078B2
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Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.