| US 7,587,008 B2 | ||
| Decoding error correcting codes transmitted through multiple wire twisted pair cables with uneven noise on the wires | ||
| Ba-Zhong Shen, Irvine, Calif. (US); Scott Richard Powell, Carlsbad, Calif. (US); and Kelly Brian Cameron, Irvine, Calif. (US) | ||
| Assigned to Broadcom Corporation, Irvine, Calif. (US) | ||
| Filed on Jun. 30, 2005, as Appl. No. 11/172,551. | ||
| Claims priority of provisional application 60/613923, filed on Sep. 28, 2004. | ||
| Claims priority of provisional application 60/627452, filed on Nov. 12, 2004. | ||
| Claims priority of provisional application 60/604426, filed on Aug. 25, 2004. | ||
| Claims priority of provisional application 60/655312, filed on Feb. 23, 2005. | ||
| Prior Publication US 2006/0045213 A1, Mar. 02, 2006 | ||
| Int. Cl. H04B 1/10 (2006.01); H04B 1/38 (2006.01) | ||
| U.S. Cl. 375—349 [375/222] | 26 Claims |
| 1. A metric generator implemented within a communication device, the metric generator comprising:
an input that is operable to:
receive a first discrete valued modulation symbol that corresponds to a first signal path having a first SNR (Signal to Noise
Ratio); and
receive a second discrete valued modulation symbol that corresponds to a second signal path having a second SNR;
a metric calculation functional block that is operable to:
calculate a first symbol metric corresponding to the first discrete valued modulation symbol using an amplification factor,
a variance of the first SNR, and a standard deviation of the first SNR; and
calculate a second symbol metric corresponding to the second discrete valued modulation symbol using the amplification factor,
a variance of the second SNR, and a standard deviation of the second SNR; and
an output that is operable to provide the first symbol metric and the second symbol metric to an ECC (Error Correcting Code)
decoder.
|