An Improved Ordered-Block MMSE Detector for Generalized Spatial Modulation
An Improved Ordered-Block MMSE Detector for Generalized Spatial Modulation
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DOI：
10.1109/lcomm.2015.2402251
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发表时间：
2015-02
期刊：
影响因子：
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通讯作者：
Chiao-En Chen;Cheng-Han Li;Yuan-Hao Huang
中科院分区：
文献类型：
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作者：
Chiao-En Chen;Cheng-Han Li;Yuan-Hao Huang
在这封信中，提出了一种用于广义空间调制系统的改进有序块最小均方误差（OB-MMSE）检测器。我们首先建议使用从条件最大似然估计器导出的集中距离度量作为 OB-MMSE 的排序度量，然后设计一种计算高效的算法来计算该度量。所提出算法改进的排序性能允许 OB-MMSE 检测器提前终止，而不会造成明显的性能损失，这可以用来进一步降低其复杂性。仿真结果表明，与现有的 OB-MMSE 检测器相比，所提出的算法可以实现更好的性能-复杂性权衡。
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.