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expression is provided for Gray-coded rectangular quadrature amplitude modulation (R-QAM) signals. The characteristics of Gray code mapping such as symmetries and repeated formats of the bit assignment in a symbol among bit groups are applied effectively for the simplification of the LLR expression. In order to reduce the complexity of the max-log-MAP(More)
In this paper, we present a simple and general bitwise decomposition expression using log likelihood ratio (LLR) of an arbitrary gray coded rectangular M-QAM signal. Based on the max-log MAP algorithm, we replace the mathematical max or min functions of the conventional LLR expression with simple arithmetic functions associated with given parameters such as(More)
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