In this letter, we formulate computationally efficient precoder and detector design problems for symbol-level generalized precoding-aided spatial modulation (GPQSM) systems with phase-shift-keying signaling. We first present a novel low-complexity decoupled detector. Subsequently, we formulate two new precoders using constructive interference (CI) techniques to enhance the performance of the proposed decoupled detector. We then demonstrate that both precoder design problems share a unified form, which enables them to be solved efficiently using the existing iterative closed-form algorithm. Finally, we show that our proposed CI precoders under efficient implementation strike the best balance between performance and complexity relative to other benchmark algorithms through numerical simulations.

中文翻译：

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用于具有相移键控信令的广义预编码辅助正交空间调制的相长干扰预编码


在这封信中，我们为具有相移键控信令的符号级广义预编码辅助空间调制（GPQSM）系统制定了计算高效的预编码器和检测器设计问题。我们首先提出一种新颖的低复杂度解耦检测器。随后，我们使用相长干涉（CI）技术制定了两个新的预编码器，以增强所提出的解耦检测器的性能。然后，我们证明这两个预编码器设计问题共享统一的形式，这使得它们能够使用现有的迭代封闭式算法有效地解决。最后，我们通过数值模拟表明，相对于其他基准算法，我们提出的 CI 预编码器在高效实现下实现了性能和复杂性之间的最佳平衡。