Replies to post #286481 on InterDigital Inc (IDCC)

[Gamco]

United States Patent 7,683,834
Goldberg March 23, 2010

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Undulating transmit patterns for multiple simultaneous transmitters to support signal separation at a receiver


Abstract
A communications system includes multiple mobile wireless communications devices transmitting at a same time to a fixed receiver assembly. Each mobile wireless communications device transmits a source signal defined by a respective character set comprising a plurality of symbols. At least one of the symbols in the respective character sets is transmitted at a different power level so that the transmitted source signal from each mobile wireless communications device appears with linearly independent power level time periods. The linearly independent power level time periods are used by the fixed receiver assembly to populate a mixing matrix for signal separation processing.


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Inventors: Goldberg; Steven J. (Downingtown, PA)
Assignee: InterDigital Technology Corporation (Wilmington, DE)

Appl. No.: 11/612,818
Filed: December 19, 2006

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Related U.S. Patent Documents

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Application Number Filing Date Patent Number Issue Date
11233316 Sep., 2005 7190308
60612546 Sep., 2004
60612435 Sep., 2004
60612433 Sep., 2004
60612550 Sep., 2004
60612632 Sep., 2004
60612548 Sep., 2004
60612471 Sep., 2004
60612551 Sep., 2004
60612469 Sep., 2004
60612547 Sep., 2004
60615338 Oct., 2004
60615260 Oct., 2004
60620775 Oct., 2004
60620776 Oct., 2004
60620862 Oct., 2004
60621113 Oct., 2004
60639223 Dec., 2004


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Current U.S. Class: 342/378 ; 342/377; 702/190
Current International Class: G01S 3/16 (20060101); H01Q 3/00 (20060101)
Field of Search: 342/373,377-378,380,382-383 455/103,105,137-138 702/190-197,FOR164