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A Low-Complexity Max-Log-MAP Detector
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DOI：10.1109/TCOMM.2009.08.070126.png)
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Abstract
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A low-complexity soft-output Max-log-MAP (maximum a posteriori probability) detector for N-2-QAM is exemplified for a 64-QAM 2 x M multiple-input-multiple-output (MIMO) system, exhibiting the following novel features: (1) hierarchical formulation of the exhaustive metric calculation to reduce the number of candidate tests by a factor of N per received symbol, and (2) multiplier-free implementation of the exhaustive search with 8-fold parallelization. The computational complexity is reduced a factor of about 250, resulting in a chip area of 0.031 mm(2) using 65nm CMOS.
Keywords:
Multiple-input-multiple-output (MIMO)
maximum a posteriori detection
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