Error detection/correction and fault detection/recovery – Pulse or data error handling – Digital data error correction
Reexamination Certificate
2008-07-15
2008-07-15
Louis-Jacques, Jacques (Department: 2112)
Error detection/correction and fault detection/recovery
Pulse or data error handling
Digital data error correction
C714S752000
Reexamination Certificate
active
11190334
ABSTRACT:
Amplifying magnitude metric of received signals during iterative decoding of LDPC code and LDPC coded modulation. By appropriately selecting a metric coefficient value that is used to calculate the initial conditions when decoding LDPC coded signals, a significant reduction in BER may be achieved at certain SNRs. The appropriate selection of the metric coefficient value may be performed depending on the particular SNR at which a communication system is operating. By adjusting this metric coefficient value according to the given LDPC code, modulation, and noise variance, the overall performance of the decoding may be significantly improved. The convergence speed is slowed down so that the decoder will not go to the wrong codeword, and the moving range of the outputs of the decoder is restricted so that the output will not oscillate too much and will eventually move to the correct codeword.
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Cameron Kelly Brian
Powell Scott Richard
Shen Ba-Zhong
Tran Hau Thien
Alphonse Fritz
Broadcom Corporation
Garlick & Harrison & Markison
Louis-Jacques Jacques
Short Shayne X.
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