The authors present an efficient, sub-optimal, soft-in-soft-out decoding rule for single parity check (SPC) codes, which requires only three addition-equivalent-operations per information bit. Its application is demonstrated by the simulation results of a rate 5/6 four-dimensional concatenated SPC code, for which performance of BER=10/sup -5/ at E/sub h//N/sub 0/=3.5 dB is observed, which is only /spl sim/1.2 dB from the theoretical limit.
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机译：作者提出了一种有效的，次优的，单奇偶校验（SPC）码的软入软出解码规则，每个信息位仅需要三个加法等效操作。速率为5/6的四维级联SPC码的仿真结果证明了其应用，其中在E / sub h // N / sub 0 / = 3.5 dB时观察到BER = 10 / sup -5 /的性能。 ，仅比理论极限值高/ spl sim / 1.2 dB。
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