Performance evaluation of low-density parity-check codes in the presence of inter-symbol interference, colored noise, and 1/f noise.

摘要

The class of Low-Density Parity-Check (LDPC) codes includes some of the most powerful capacity-approaching codes reported to date. As a result, LDPC codes have been considered for many new communication standards. However, a better understanding of the effects of the signal impairments that exist in such applications is required. In this thesis, the performance of various LDPC codes, including recent candidate LDPC codes for 10GBASE-T Ethernet, in the presence of channel impairments is evaluated and compared with the effects of conventional Additive White Gaussian Noise (AWGN). The channel impairments in this study include Inter-Symbol Interference (ISI), high-frequency and low-frequency Additive Colored Gaussian Noise (ACGN), and 1/f noise. The results show that LDPC codes appear to be more sensitive to AWGN than to ISI, but for the case of colored noise, they are more vulnerable to ACGN and 1/f noise than to AWGN.