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METHOD AND APPARATUS FOR PERFORMING SOFT DEMAPPING IN ROTATED QUADRATURE AMPLITUDE MODULATION (QAM) BASED COMMUNICATION SYSTEM
METHOD AND APPARATUS FOR PERFORMING SOFT DEMAPPING IN ROTATED QUADRATURE AMPLITUDE MODULATION (QAM) BASED COMMUNICATION SYSTEM
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机译:在基于旋转正交幅度调制(QAM)的通信系统中执行软解映射的方法和装置
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摘要
A soft demapping apparatus and method thereof includes a pre-processing unit to pre-process a reception signal obtained from a symbol representing bits. A candidate selection unit selects two candidates from among constellation points included in a constellation for each of the bits. A distance calculation unit calculates a Euclidean distance between the reception signal and the two candidates. A log-likelihood ratio (LLR) calculation unit calculates an LLR with respect to the bits based on the Euclidean distance between the reception signal and the two candidates.
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