Pragmatic approach to soft-decision decoding of linear block codes

Autor: Thesling, W.H., Xiong, F.
Zdroj: IEE Proceedings - Communications; February 1995, Vol. 142 Issue: 1 p40-47, 8p
Abstrakt: The complexity of algorithms to perform soft-decision decoding on block codes has impeded their use in practical systems. The authors investigate correlation decoding along with hard-decision decoding. The proposed method uses a hard-decision decoder that decodes to a codeword. Although this codeword may be in error, it is usually close in Hamming distance to the transmitted codeword. Correlation is then performed on only a small set of 'nearby' codewords. This pseudo maximum likelihood (PML) decoding method can approach the performance of true correlation decoding with a significant reduction in complexity.
Databáze: Supplemental Index