US 7,322,005 B2 | ||
LDPC (Low Density Parity Check) coded modulation symbol decoding using non-Gray code maps for improved performance | ||
Ba-Zhong Shen, Irvine, Calif. (US); Hau Thien Tran, Irvine, Calif. (US); and Kelly Brian Cameron, Irvine, Calif. (US) | ||
Assigned to Broadcom Corporation, Irvine, Calif. (US) | ||
Filed on Mar. 16, 2004, as Appl. No. 10/802,023. | ||
Application 10/802023 is a continuation in part of application No. 10/668526, filed on Sep. 23, 2003, granted, now 7,159,170. | ||
Claims priority of provisional application 60/548953, filed on Mar. 01, 2004. | ||
Claims priority of provisional application 60/490967, filed on Jul. 29, 2003. | ||
Claims priority of provisional application 60/478690, filed on Jun. 13, 2003. | ||
Prior Publication US 2004/0255231 A1, Dec. 16, 2004 | ||
This patent is subject to a terminal disclaimer. | ||
Int. Cl. G06F 11/00 (2006.01); H03M 13/00 (2006.01) |
U.S. Cl. 714—801 [714/755] | 30 Claims |
8. A decoder that is operable to perform symbol decoding of an LDPC-BICM (Low Density Parity Check-Bit Interleaved Coded Modulation)
signal that includes at least one symbol that is mapped using a non-Gray code mapping, the decoder comprising:
a check node update functional block that is operable to update a plurality of edge messages that corresponds to a plurality
of edges that communicatively couple a plurality of symbol nodes to a plurality of check nodes within an LDPC (Low Density
Parity Check) coded modulation bipartite graph that corresponds to an LDPC code; and
a symbol sequence estimate and symbol node update functional block that is operable to employ the updated plurality of edge
messages when making a best estimate of a symbol of the LDPC-BICM signal.
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