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An Improved Ordered-Block MMSE Detector for Generalized Spatial Modulation
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DOI：10.1109/LCOMM.2015.2402251.png)
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Abstract
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In this letter, an improved ordered-block minimum-mean-squared-error (OB-MMSE) detector for generalized spatial modulation systems is presented. We first propose to use the concentrated distance metric derived from the conditional maximum likelihood estimator as the ordering metric for the OB-MMSE and then design a computationally-efficient algorithm for computing this metric. The improved ordering performance of the proposed algorithm allows the early-termination of the OB-MMSE detector without noticeable performance loss which can be exploited to further reduce its complexity. Simulation results show that the proposed algorithm can achieve better performance-complexity tradeoff compared to the existing OB-MMSE detector.
Keywords:
Spatial modulation (SM)
generalized spatial modulation (GSM)
multiple-input-multiple-output (MIMO)
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