A Study on Turbo Soft-Decision Decoding for Hard-Detected Optical Communication Signals

概要

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We propose a method to realize soft-derision decoding for hard-detected signals. In this paper, a novel concept is introduced as "error-deleeled reliability." The method is very useful for optical fiber communications (OFC) as hard detection is the only detection method for the OFC systems. We demonstrate our proposed method using the turbo code in which soft information is required for decoding. As a result, the simulation shows slight difference in the range of moderate to high signal-to-noise ratio between the proposed decoding scheme and the conventional turbo decoding scheme. Moreover, the bit error rate of If 10^<〜11> can be achieved by serial concatenation of a ReedSolomon code and a turbo code for Q-factor lower than 8.0dB with a bandwidth expansion ratio of 33.3%.
社団法人電子情報通信学会の論文
2003-03-01