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Low-Complexity Signal Detection for Generalized Spatial Modulation

机译：通用空间调制的低复杂度信号检测

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摘要

Generalized spatial modulation (GSM), in which only part of the transmit antennas are activated in each time slot, was recently proposed as a trade-off between spatial modulation (SM) and vertical Bell laboratories space-time (V-BLAST). Although the maximum likelihood (ML) detector is able to achieve the optimal performance, its exhaustive search leads to intractable computational complexity. In this letter, an efficient signal detection algorithm, termed ordered block minimum mean-squared error (OB-MMSE), is proposed for achieving near-ML performance with low complexity. On one hand, an ordering algorithm is proposed to sort the possible transmit antenna combinations (TACs). On the other hand, the possible signal vector for each ordered TAC is detected by block-MMSE equalization. Simulation results show that the proposed OB-MMSE detector provides similar performance to ML with near 80% reduction in complexity.
机译：最近，提出了在每个时隙中仅激活部分发射天线的通用空间调制（GSM），作为空间调制（SM）和垂直贝尔实验室的时空（V-BLAST）之间的折衷方案。尽管最大似然（ML）检测器能够实现最佳性能，但其详尽的搜索导致难以处理的计算复杂性。在这封信中，提出了一种有效的信号检测算法，称为有序块最小均方误差（OB-MMSE），以实现低复杂度的近ML性能。一方面，提出了一种排序算法来对可能的发射天线组合（TAC）进行排序。另一方面，通过块MMSE均衡来检测每个有序TAC的可能信号矢量。仿真结果表明，所提出的OB-MMSE检测器具有与ML相似的性能，并且复杂度降低了近80％。

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