We consider a wireless network comprising multiple singleantenna repeaters that amplify and instantaneously re-transmit received signals in a full-duplex (FD) communication setting. Specifically, we study a massive multiple-input multiple output base station that simultaneously serves multiple uplink (UL) and downlink (DL) user equipment (UE) over the same frequency band. The focus is on the problem of repeater weight optimization at each active repeater to maximize the sum of the weighted minimum spectral efficiencies (SEs) for both UL and DL UEs. The resulting non-convex optimization problem is tackled using a successive convex approximation technique. To demonstrate the effectiveness of the proposed approach, we evaluate its performance against benchmark systems with and without repeater assistance. The optimized FD design achieves SE improvements of up to 4-fold and 2.5-fold compared to its half-duplex counterpart.

翻译：本文研究了一种包含多个单天线中继器的无线网络，这些中继器在全双工通信场景下对接收信号进行放大并即时重传。具体而言，我们研究了一个大规模多输入多输出基站，该基站在同一频段上同时服务多个上行链路和下行链路用户设备。研究的核心问题是优化每个有源中继器的中继权重，以最大化上行和下行用户设备的加权最小频谱效率之和。我们采用逐次凸逼近技术来处理由此产生的非凸优化问题。为了验证所提方法的有效性，我们将其性能与有/无中继辅助的基准系统进行了比较。优化后的全双工设计相较于其半双工对应方案，频谱效率提升最高可达4倍和2.5倍。