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A New Approximation to the Jacobian Logarithm Suitable for MAP Decoding in BICM-ID
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作者 Slimane Benmahmoud Ali Djebbari 《Computer Technology and Application》 2013年第5期241-244,共4页
In this paper, a new method to approximate the compensation term in the Jacobian logarithm used by the MAP decoder is proposed. Using the proposed approximation, the complex functions In(.) and exp(.) in the Exact... In this paper, a new method to approximate the compensation term in the Jacobian logarithm used by the MAP decoder is proposed. Using the proposed approximation, the complex functions In(.) and exp(.) in the Exact-log-MAP algorithm can be estimated with high accuracy and lower computational complexity. The efficacy of the proposed approximation is investigated and demonstrated by applying it to iteratively decoded BICM (Bit Interleaved Coded Modulation). 展开更多
关键词 LOG-MAP Bahl-Cocke-Jelinek-Raviv (BCJR) algorithm max function Jacobian logarithm correction (compensation)term function BICM-ID (Bit Interleaved Coded Modulation with Iterative Decoding).
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