Recent applications of the Full Duplex (FD) technology focus on enabling simultaneous control communication and data transmission to reduce the control information exchange overhead, which impacts end-to-end latency and spectral efficiency. In this paper, we present a simultaneous direction estimation and data transmission scheme for millimeter Wave (mmWave) massive Multiple-Input Multiple-Output (MIMO) systems, enabled by a recent FD MIMO technology with reduced hardware complexity Self-Interference (SI) cancellation. We apply the proposed framework in the mmWave analog beam management problem, considering a base station equipped with a large transmit antenna array realizing downlink analog beamforming and few digitally controlled receive antenna elements used for uplink Direction-of-Arrival (DoA) estimation. A joint optimization framework for designing the DoA-assisted analog beamformer and the analog as well as digital SI cancellation is presented with the objective to maximize the achievable downlink rate. Our simulation results showcase that the proposed scheme outperforms its conventional half-duplex counterpart, yielding reduced DoA estimation error and superior downlink data rate.

中文翻译：

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全双工毫米波大规模 MIMO 系统中的方向辅助波束管理

全双工 (FD) 技术的最新应用侧重于实现同步控制通信和数据传输，以减少影响端到端延迟和频谱效率的控制信息交换开销。在本文中，我们提出了一种用于毫米波 (mmWave) 大规模多输入多输出 (MIMO) 系统的同步方向估计和数据传输方案，该方案通过最新的 FD MIMO 技术实现，并降低了硬件复杂性 自干扰 (SI) 消除. 我们将所提出的框架应用于毫米波模拟波束管理问题，考虑到配备大型发射天线阵列的基站实现下行链路模拟波束成形，以及用于上行链路到达方向 (DoA) 估计的少量数控接收天线元件。提出了用于设计 DoA 辅助模拟波束成形器和模拟以及数字 SI 消除的联合优化框架，其目标是最大化可实现的下行链路速率。我们的仿真结果表明，所提出的方案优于其传统的半双工方案，从而减少了 DoA 估计误差和出色的下行链路数据速率。