Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Reexamination Certificate
2004-04-09
2010-10-12
Ghayour, Mohammad H (Department: 2611)
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
C375S316000, C375S346000, C455S063100, C455S296000
Reexamination Certificate
active
07813453
ABSTRACT:
Techniques for performing data detection for a hierarchical coded data transmission are described. In one data detection scheme, log-likelihood ratios (LLRs) for code bits of a first data stream are initially derived based on received symbols for the data transmission. The LLRs for the first data stream are decoded to obtain decoded data, which is re-encoded and remodulated to obtain remodulated symbols. Interference due to the first data stream is estimated based on the remodulated symbols. LLRs for code bits of a second data stream are derived based on the LLRs for the code bits of the first data stream and the estimated interference. The LLRs for the first data stream may be derived from the received symbols in real-time without buffering the received symbols. The LLRs for the second data stream may be derived after the first data stream has been decoded.
REFERENCES:
patent: 5966412 (1999-10-01), Ramaswamy et al.
patent: 6516444 (2003-02-01), Maru
patent: 6671338 (2003-12-01), Gamal et al.
patent: 7173974 (2007-02-01), Sindhushayana
patent: 2002/0181604 (2002-12-01), Chen
patent: 2003/0076797 (2003-04-01), Lozano
patent: 2003/0103584 (2003-06-01), Bjerke et al.
patent: 2003/0172114 (2003-09-01), Leung
patent: 2004/0038653 (2004-02-01), Claussen et al.
patent: 1361686 (2003-11-01), None
patent: 07-066739 (1995-03-01), None
patent: 08-331025 (1996-12-01), None
patent: 2113761 (1998-06-01), None
patent: 2202153 (2003-04-01), None
Kannan Ramchandran et al., “Multiresolution Broadcast For Digital HDTV Using Joint Source/Channel Coding,” IEEE, vol. 11, No. 1, pp. 6-22, Jan. 1993.
Written Opinion—PCT/US04/041476, International Searching Authority—European Patent Office, Jul. 8, 2005.
International Preliminary Report on Patentability—PCT/US04/041476, IPEA/US, Sep. 7, 2006.
International Search Report—PCT/US04/041476, International Search Authority—European Patent Office—Jul. 8, 2005.
Khandekar Aamod
Krishnamoorthi Raghuraman
Ghayour Mohammad H
Joyce, III Gerald P.
Malek Leila
Minhas Sandip (Micky) S.
Qualcomm Incorporated
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