Bit Error Rate Evaluation of Concatenated Turbo and Parity-Check Product Codes

概要

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We examine a concatenated code which consists of a rate 1/2, 4-state turbo code (an inner code) and a single-parity-check product code (an outer code), and discuss the decoding structure called a double concatenated decoding scheme. From our Monte Carlo simulation trials, we show the advantage of the concatenated codes over turbo codes alone. Specifically, when we use an interleaver of 4096 bits, the E_b/N_o to obtain a BER of 10^<-6> is about 1.45 dB for the concatenated code. On the other hand, it is more than 2.5 dB for the turbo code alone. So, the E_b/N_o improvement can be achieved by about 1 dB. This improvement in E_b/N_o was also obtained for the interleavers of 8192 and 2048 bits. Therefore, the concatenated codes using a double concatenated decoding scheme can solve the problem of the BER flattening in decoding of turbo codes.
社団法人電子情報通信学会の論文
2002-07-01