This paper considers the optimization of a dual-functional radar and communication (RadCom) system with the objective is to maximize its sum-rate (SR) and energy-efficiency (EE) while satisfying certain radar target detection and data rate per user requirements. To this end, novel RadCom precoder schemes that can exploit downlink radar interference are devised for massive multiple-input-multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) systems. First, the communication capacity and radar detection performance metrics of these schemes are analytically evaluated. Then, using the derived results, optimum beam power allocation schemes are deduced to maximize SR and EE with modest computational complexity. The validity of the analytical results is confirmed via matching computer simulations. It is also shown that, compared to benchmark techniques, the devised precoders can achieve substantial improvements in terms of both SR and EE.

中文翻译：

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用于大规模 MIMO OFDM 双雷达通信系统的优化预编码器

本文考虑了双功能雷达和通信 (RadCom) 系统的优化，其目标是最大化其总速率 (SR) 和能效 (EE)，同时满足特定的雷达目标检测和每个用户的数据速率要求。为此，针对大规模多输入多输出 (MIMO) 正交频分复用 (OFDM) 系统设计了可以利用下行链路雷达干扰的新型 RadCom 预编码器方案。首先，对这些方案的通信容量和雷达检测性能指标进行了分析评估。然后，使用导出的结果，推导出最佳波束功率分配方案，以在适度的计算复杂度下最大化 SR 和 EE。分析结果的有效性通过匹配的计算机模拟得到证实。还表明，