Abstract
Communication systems employing subchannel communication such as OFDM or multicode CDMA have a disadvantage of power variation of the transmitted signal. The present invention provides reduced power variation without compromising performance or bandwidth. Information symbols to be transmitted on the individual subchannel are fed to encoders which map the information symbols into channel symbols by increasing their order. The encoding in response to a forward error correction scheme and includes selection between redundant symbol values to reduce power variation. Preferably the encoder includes a trellis coder jointly encoding the symbols and a compensation data set to reduce power variation.
The invention relates to a communication system employing subchannel communication such as OFDM or multicode CDMA. A significant disadvantage of subchannel communication is the power variation of the transmitted signal. The invention provides a system and method with reduced power variation without compromising performance or increasing transmission bandwidth. According to the invention the information symbols to be transmitted on the individual subchannel are fed to encoders (809-815) which maps the information symbols into channel symbols by increasing the order of the symbols. The encoding is both in response to a forward error correction scheme and includes selection between redundant symbol values to reduce power variation of the combined signal. The channel symbols are fed to a modulator (309) and the modulated signal is transmitted. Preferably the encoder comprises a trellis coder jointly encoding the information symbols and compensation data set to reduce the power level variation.
| Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
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| Declaration Date | Declaration Reference | Declaring Company | Specification Number | ||||||
| 4G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC |
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No | Family Member | |||
| 4G,3G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC | No | Family Member | ||||
| 4G,3G,2G | 29/02/2012 | ISLD-201203-005 | MOTOROLA 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 | |||||
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| Declaration Date | Declaration Reference | Declaring Company | Specification Number | |||||||
| US7031397B1 | 4G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC |
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Yes | Basis Patent | |||
| US7031397B1 | 4G,3G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC | Yes | Basis Patent | ||||
| US7031397B1 | 4G,3G,2G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC | Yes | Basis Patent | ||||
| EP1145573A2 | 4G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC |
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No | Family Member | |||
| EP1145573A2 | 4G,3G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC | No | Family Member | ||||
| EP1145573A2 | 4G,3G,2G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC | No | Family Member | ||||
| EP1145573B1 | 4G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC |
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No | Family Member | |||
| EP1145573B1 | 4G,3G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC | No | Family Member | ||||
| EP1145573B1 | 4G,3G,2G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC | No | Family Member | ||||
| GB2339514A | 4G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC |
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No | Family Member | |||
| GB2339514A | 4G,3G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC | No | Family Member | ||||
| GB2339514A | 4G,3G,2G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC | No | Family Member | ||||
| JP2002520961A | 4G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC |
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Yes | Family Member | |||
| JP2002520961A | 4G,3G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC | Yes | Family Member | ||||
| JP2002520961A | 4G,3G,2G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC | Yes | Family Member | ||||
| JP4294221B2 | 4G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC |
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Yes | Family Member | |||
| JP4294221B2 | 4G,3G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC | Yes | Family Member | ||||
| JP4294221B2 | 4G,3G,2G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC | Yes | Family Member | ||||
| WO0003552A2 | 4G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC |
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No | Family Member | |||
| WO0003552A2 | 4G,3G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC | No | Family Member | ||||
| WO0003552A2 | 4G,3G,2G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC | No | Family Member | ||||
| WO0003552A3 | 4G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC |
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No | Family Member | |||
| WO0003552A3 | 4G,3G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC | No | Family Member | ||||
| WO0003552A3 | 4G,3G,2G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC | No | Family Member | ||||
| DE69905948T2 | 4G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC |
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No | Family Member | |||
| DE69905948T2 | 4G,3G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC | No | Family Member | ||||
| DE69905948T2 | 4G,3G,2G | 29/02/2012 | ISLD-201203-005 | MOTOROLA INC | No | Family Member | ||||
| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies
Signal Processing
Product
Use Cases
Wireless communication
Services
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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
The information in grey was provided by the patent holder
The information in purple was extracted from the FrandAvenue
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.