This correspondence investigates computationally efficient constructive interference (CI)-based precoding for phase-shift-keying (PSK)-modulated multiuser multiple-input-single-output (MISO) systems. In contrast to the existing CI-based precoders which are designed exclusively under the sum power constraint, we focus on the design problem under the more challenging but realistic per-antenna power constraint (PAPC). We showed that both the strict and non-strict phase rotation CI-based precoders under PAPC can be efficiently realized under a unified new framework. Simulation results showed that the proposed CI-based precoders admit substantially lower complexity while achieving essentially the same error rate performance as their optimization-based counterparts.

中文翻译：

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在每天线功率约束下用于 PSK 调制的计算有效的建设性干扰预编码

该对应关系研究了基于相移键控 (PSK) 调制多用户多输入单输出 (MISO) 系统的计算高效建设性干扰 (CI) 预编码。与专门在总功率约束下设计的现有基于 CI 的预编码器相比，我们专注于更具挑战性但更现实的每天线功率约束 (PAPC) 下的设计问题。我们表明，在统一的新框架下，可以有效地实现 PAPC 下的严格和非严格的基于相位旋转 CI 的预编码器。仿真结果表明，所提出的基于 CI 的预编码器的复杂度大大降低，同时实现了与其基于优化的对应物基本相同的错误率性能。