Abstract
Synchronized broadcast transmits a same broadcast content using a same waveform from multiple transmitters. Transmitters each apply a same spreading code for broadcast transmissions. In a spread-spectrum communication system having a time division multiplexed forward link, a synchronized broadcast transmission is inserted into a broadcast slot. One embodiment employs an Orthogonal Frequency Divisional Multiplex (OFDM) waveform for the synchronized broadcast. An OFDM receiver is then used to process the received synchronized broadcast transmission. An alternate embodiment implements a broadcast Pseudo-random Noise (PN) code for use by multiple transmitters. An equalizer is then employed to estimate the synchronized broadcast transmission.
| Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
|---|---|---|---|---|---|---|---|---|---|
| Declaration Date | Declaration Reference | Declaring Company | Specification Number | ||||||
| 3G | 02/03/2010 | ISLD-201004-005 | QUALCOMM INC | No | Family Member | ||||
| Not Available | 02/03/2010 | ISLD-201004-005 | QUALCOMM INC | No | Family Member | ||||
| 4G | 29/01/2017 | ISLD-201703-174 | QUALCOMM INC |
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No | Family Member | |||
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| 5G | 31/05/2022 | ISLD-202205-072 | QUALCOMM INC | No | Family Member | ||||
Specification Information
Specification Information
Technologies
Family Information
| All Granted Patents In Patent Family : | ---- |
| All Pending Patents In Patent Family : | ---- |
| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Declaration Date | Declaration Reference | Declaring Company | Specification Number | |||||||
| US2005175070A1 | 3G | 02/03/2010 | ISLD-201004-005 | QUALCOMM INC | Yes | Basis Patent | ||||
| US2005175070A1 | Not Available | 02/03/2010 | ISLD-201004-005 | QUALCOMM INC | Yes | Basis Patent | ||||
| US2005175070A1 | 4G | 29/01/2017 | ISLD-201703-174 | QUALCOMM INC |
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No | Family Member | |||
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No | Family Member | |||
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No | Family Member | |||
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No | Family Member | |||
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No | Family Member | |||
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No | Family Member | |||
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No | Family Member | |||
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No | Family Member | |||
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No | Family Member | |||
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S1
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No | Family Member | |||
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S1
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No | Family Member | |||
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S1
S2
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Yes | Basis Patent | |||
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S1
S2
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Yes | Basis Patent | |||
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S1
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No | Family Member | |||
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S1
S2
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No | Family Member | |||
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S1
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No | Family Member | |||
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Declaration Date | Declaration Reference | Declaring Company | Specification Information | |||||||||
| ----- | ----- | ----- | ----- | ----- |
S1
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----- | ----- | ----- | ----- | |||
Technologies
Broadcast/Multicast
Product
Use Cases
Wireless communication
Services
Claim
1. A method of receiving synchronized broadcasts, the method comprising:
receiving, by a receiver, a first transmission slot from a first transmitter, wherein the first transmission slot includes a synchronized broadcast portion modulated using a first modulation format that is common to the first transmitter and at least a second transmitter that is distinct from the first transmitter and further includes a unicast portion modulated using a second modulation format that is specific to the first transmitter, wherein the first modulation format is a different format than the second modulation format;
demodulating the synchronized broadcast portion of the first transmission slot, wherein the synchronized broadcast portion of the first transmission slot is demodulated based on the first modulation format; and
demodulating the unicast portion of the first transmission slot, wherein the unicast portion of the first transmission slot is demodulated based on the second modulation format.', 'receiving, by a receiver, a first transmission slot from a first transmitter, wherein the first transmission slot includes a synchronized broadcast portion modulated using a first modulation format that is common to the first transmitter and at least a second transmitter that is distinct from the first transmitter and further includes a unicast portion modulated using a second modulation format that is specific to the first transmitter, wherein the first modulation format is a different format than the second modulation format;', 'demodulating the synchronized broadcast portion of the first transmission slot, wherein the synchronized broadcast portion of the first transmission slot is demodulated based on the first modulation format; and', 'demodulating the unicast portion of the first transmission slot, wherein the unicast portion of the first transmission slot is demodulated based on the second modulation format.
2. The method of claim 1, further comprising:
selecting a first demodulator to demodulate the synchronized broadcast portion; and
selecting a second demodulator to demodulate the unicast portion.', 'selecting a first demodulator to demodulate the synchronized broadcast portion; and', 'selecting a second demodulator to demodulate the unicast portion.
3. The method of claim 1, wherein the first modulation format comprises an orthogonal frequency division modulation (OFDM) format.
4. The method of claim 1, wherein the second modulation format comprises a code division modulation (CDM) format.
5. The method of claim 1, wherein the first modulation format comprises a code division modulation (CDM) format associated with a broadcast spreading code used by multiple transmitters including the first transmitter and the second transmitter.
6. The method of claim 5, further comprising:
receiving similar waveforms associated with a broadcast transmission from the multiple transmitters, wherein the synchronized broadcast portion is transmitted via the broadcast transmission, and wherein the similar waveforms generate an artificial multipath component associated with a frequency-selective composite channel response; and
processing the similar waveforms by compensating for the frequency-selective composite channel response.', 'receiving similar waveforms associated with a broadcast transmission from the multiple transmitters, wherein the synchronized broadcast portion is transmitted via the broadcast transmission, and wherein the similar waveforms generate an artificial multipath component associated with a frequency-selective composite channel response; and', 'processing the similar waveforms by compensating for the frequency-selective composite channel response.
7. The method of claim 6, wherein compensating for the frequency-selective composite channel response comprises applying an inverse of the frequency-selective composite channel response to the similar waveforms.
8. The method of claim 1, wherein demodulating the synchronized broadcast portion comprises equalizing the synchronized broadcast portion.
9. The method of claim 8, wherein equalizing the synchronized broadcast portion comprises training an equalizer using a pilot of the synchronized broadcast portion
10. An apparatus to receive synchronized broadcasts, the apparatus comprising:
a receiver, comprising:
means for receiving a first transmission slot from a first transmitter, wherein the first transmission slot includes a synchronized broadcast portion modulated using a first modulation format that is common to the first transmitter and at least a second transmitter that is distinct from the first transmitter and further includes a unicast portion modulated using a second modulation format that is specific to the first transmitter, wherein the first modulation format is a different format than the second modulation format;
means for demodulating the synchronized broadcast portion of the first transmission slot, wherein the synchronized broadcast portion of the first transmission slot is demodulated based on the first modulation format; and
means for demodulating the unicast portion of the first transmission slot, wherein the unicast portion of the first transmission slot is demodulated based on the second modulation format.', 'a receiver, comprising:
means for receiving a first transmission slot from a first transmitter, wherein the first transmission slot includes a synchronized broadcast portion modulated using a first modulation format that is common to the first transmitter and at least a second transmitter that is distinct from the first transmitter and further includes a unicast portion modulated using a second modulation format that is specific to the first transmitter, wherein the first modulation format is a different format than the second modulation format;
means for demodulating the synchronized broadcast portion of the first transmission slot, wherein the synchronized broadcast portion of the first transmission slot is demodulated based on the first modulation format; and
means for demodulating the unicast portion of the first transmission slot, wherein the unicast portion of the first transmission slot is demodulated based on the second modulation format.', 'means for receiving a first transmission slot from a first transmitter, wherein the first transmission slot includes a synchronized broadcast portion modulated using a first modulation format that is common to the first transmitter and at least a second transmitter that is distinct from the first transmitter and further includes a unicast portion modulated using a second modulation format that is specific to the first transmitter, wherein the first modulation format is a different format than the second modulation format;', 'means for demodulating the synchronized broadcast portion of the first transmission slot, wherein the synchronized broadcast portion of the first transmission slot is demodulated based on the first modulation format; and', 'means for demodulating the unicast portion of the first transmission slot, wherein the unicast portion of the first transmission slot is demodulated based on the second modulation format
11. The apparatus of claim 10, wherein the means for demodulating the synchronized broadcast portion comprises a first demodulator and the means for demodulating the unicast portion comprises a second demodulator
12. The apparatus of claim 10, wherein the first modulation format comprises an orthogonal frequency division modulation (OFDM) format
13. The apparatus of claim 10, wherein the second modulation format comprises a code division modulation (CDM) format
14. The apparatus of claim 10, wherein the first modulation format comprises a code division modulation (CDM) format associated with a broadcast spreading code used by multiple transmitters including the first transmitter and the second transmitter
15. The apparatus of claim 14, wherein the means for receiving the first transmission slot is configured to receive similar waveforms associated with a broadcast transmission from the multiple transmitters, wherein the synchronized broadcast portion is transmitted via the broadcast transmission, wherein the similar waveforms generate an artificial multipath component associated with a frequency-selective composite channel response, and further comprising means for processing the similar waveforms by compensating for the frequency-selective composite channel response.16. The apparatus of claim 15, wherein the means for processing the similar waveforms is operable to apply an inverse of the frequency-selective composite channel response to the similar waveforms.17. The apparatus of claim 10, wherein the means for demodulating the synchronized broadcast portion comprises means for equalizing the synchronized broadcast portion.18. The apparatus of claim 17, wherein the means for equalizing the synchronized broadcast portion comprises means for training an equalizer using a pilot of the synchronized broadcast portion.19. An apparatus to receive synchronized broadcasts, the apparatus comprising:
a receiver, comprising:
a receiving unit to receive a first transmission slot from a first transmitter, wherein the first transmission slot includes a synchronized broadcast portion modulated using a first modulation format common to the first transmitter and at least a second transmitter that is distinct from the first transmitter and further includes a unicast portion modulated using a second modulation format specific to the first transmitter, wherein the first modulation format is a different format than the second modulation format;
a first demodulator to demodulate the synchronized broadcast portion of the first transmission slot, wherein the synchronized broadcast portion of the first transmission slot is demodulated based on the first modulation format; and
a second demodulator to demodulate the unicast portion of the first transmission slot, wherein the unicast portion of the first transmission slot is demodulated based on the second modulation format.', 'a receiver, comprising:
a receiving unit to receive a first transmission slot from a first transmitter, wherein the first transmission slot includes a synchronized broadcast portion modulated using a first modulation format common to the first transmitter and at least a second transmitter that is distinct from the first transmitter and further includes a unicast portion modulated using a second modulation format specific to the first transmitter, wherein the first modulation format is a different format than the second modulation format;
a first demodulator to demodulate the synchronized broadcast portion of the first transmission slot, wherein the synchronized broadcast portion of the first transmission slot is demodulated based on the first modulation format; and
a second demodulator to demodulate the unicast portion of the first transmission slot, wherein the unicast portion of the first transmission slot is demodulated based on the second modulation format.', 'a receiving unit to receive a first transmission slot from a first transmitter, wherein the first transmission slot includes a synchronized broadcast portion modulated using a first modulation format common to the first transmitter and at least a second transmitter that is distinct from the first transmitter and further includes a unicast portion modulated using a second modulation format specific to the first transmitter, wherein the first modulation format is a different format than the second modulation format;', 'a first demodulator to demodulate the synchronized broadcast portion of the first transmission slot, wherein the synchronized broadcast portion of the first transmission slot is demodulated based on the first modulation format; and', 'a second demodulator to demodulate the unicast portion of the first transmission slot, wherein the unicast portion of the first transmission slot is demodulated based on the second modulation format.
20. The apparatus of claim 19, wherein the first modulation format comprises an orthogonal frequency division modulation (OFDM) format.
21. The apparatus of claim 19, wherein the second modulation format comprises a code division modulation (CDM) format.
22. The apparatus of claim 19, wherein the first modulation format comprises a code division modulation (CDM) format associated with a broadcast spreading code used by multiple transmitters including the first transmitter and the second transmitter.
23. The apparatus of claim 22, further comprising:
circuitry to receive similar waveforms associated with a broadcast transmission from the multiple transmitters, wherein the synchronized broadcast portion is transmitted via the broadcast transmission, and wherein the similar waveforms generate an artificial multipath component associated with a frequency-selective composite channel response; and
circuitry to process the similar waveforms by compensating for the frequency-selective composite channel response.', 'circuitry to receive similar waveforms associated with a broadcast transmission from the multiple transmitters, wherein the synchronized broadcast portion is transmitted via the broadcast transmission, and wherein the similar waveforms generate an artificial multipath component associated with a frequency-selective composite channel response; and', 'circuitry to process the similar waveforms by compensating for the frequency-selective composite channel response.
24. The apparatus of claim 23, wherein the circuitry to process the similar waveforms is further operable to apply an inverse of the frequency-selective composite channel response to the similar waveforms.
25. The apparatus of claim 19, wherein the first demodulator comprises an equalizer operable to equalize the synchronized broadcast portion.
26. The apparatus of claim 25, wherein equalizing the synchronized broadcast portion comprises training the equalizer using a pilot of the synchronized broadcast portion.
27. A non-transitory computer-readable storage medium comprising instructions operable, when executed by a computer, to cause the computer to:
receive a first transmission slot, wherein the first transmission slot includes a synchronized broadcast portion modulated using a first modulation format common to a first transmitter and at least a second transmitter that is distinct from the first transmitter and further includes a unicast portion modulated using a second modulation format specific to the first transmitter, wherein the first modulation format is a different format than the second modulation format;
demodulate the synchronized broadcast portion of the first transmission slot, wherein the synchronized broadcast portion of the first transmission slot is demodulated based on the first modulation format; and
demodulate the unicast portion of the first transmission slot, wherein the unicast portion of the first transmission slot is demodulated based on the second modulation format.', 'receive a first transmission slot, wherein the first transmission slot includes a synchronized broadcast portion modulated using a first modulation format common to a first transmitter and at least a second transmitter that is distinct from the first transmitter and further includes a unicast portion modulated using a second modulation format specific to the first transmitter, wherein the first modulation format is a different format than the second modulation format;', 'demodulate the synchronized broadcast portion of the first transmission slot, wherein the synchronized broadcast portion of the first transmission slot is demodulated based on the first modulation format; and', 'demodulate the unicast portion of the first transmission slot, wherein the unicast portion of the first transmission slot is demodulated based on the second modulation format.
28. The non-transitory computer-readable storage medium of claim 27, wherein the instructions are further operable, when executed by the computer, to cause the computer to:
select a first demodulator to demodulate the synchronized broadcast portion; and
select a second demodulator to demodulate the unicast portion.', 'select a first demodulator to demodulate the synchronized broadcast portion; and', 'select a second demodulator to demodulate the unicast portion.
29. The non-transitory computer-readable storage medium of claim 27, wherein the first modulation format comprises an orthogonal frequency division modulation (OFDM) format.
30. The non-transitory computer-readable storage medium of claim 27, wherein the second modulation format comprises a code division modulation (CDM) format.
31. The non-transitory computer-readable storage medium of claim 27, wherein the first modulation format comprises a code division modulation (CDM) format associated with a broadcast spreading code used by multiple transmitters including the first transmitter and the second transmitter.
32. The non-transitory computer-readable storage medium of claim 31, wherein the instructions are further operable, when executed by the computer, to cause the computer to:
receive similar waveforms associated with a broadcast transmission from the multiple transmitters, wherein the synchronized broadcast portion is transmitted via the broadcast transmission, and wherein the similar waveforms generate an artificial multipath component associated with a frequency-selective composite channel response; and
process the similar waveforms by compensating for the frequency-selective composite channel response.', 'receive similar waveforms associated with a broadcast transmission from the multiple transmitters, wherein the synchronized broadcast portion is transmitted via the broadcast transmission, and wherein the similar waveforms generate an artificial multipath component associated with a frequency-selective composite channel response; and', 'process the similar waveforms by compensating for the frequency-selective composite channel response.
33. The non-transitory computer-readable storage medium of claim 32, wherein compensating for the frequency-selective composite channel response comprises applying an inverse of the frequency-selective composite channel response to the similar waveforms.
34. The non-transitory computer-readable storage medium of claim 27, wherein demodulating the synchronized broadcast portion comprises equalizing the synchronized broadcast portion.
35. The non-transitory computer-readable storage medium of claim 34, wherein equalizing the synchronized broadcast portion comprises training an equalizer using a pilot of the synchronized broadcast portion.']
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ClaimChart-US8737538B2-STO
Patent number:US8737538B2
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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
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Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
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Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
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