Performance Analysis of Finite-Length LDPC Codes Over Asymmetric Memoryless Channels
Zhen Xing Mei, Kui Cai, Guanghui Song · IEEE Transactions on Vehicular Technology · 2019
In this paper, we analyze the waterfall performance of finite-length low-density parity-check (LDPC) codes for asymmetric memoryless channels by considering variations of channel parameters: the observed bit error rate Pobsand mutual information Iobsduring the real-time transmission. Moreover, we propose to use the variation of a new channel parameter: the maximal achievable channel coding rate Robs at finite blocklengths to estimate the waterfall performance. Simulation results demonstrate that our estimations can well predict the waterfall performance of LDPC codes. In particular, the estimation based on Robscan fit the waterfall performance for various code lengths. For estimations based on Pobsand Iobs, their accuracy increases as the codeword length increases and no curve fitting is required.