摘要
针对毫米波大规模多天线双功能雷达通信系统能量效率低、硬件成本过高等问题,建立双功能雷达通信新模型,提出并求解系统能效最大化问题。首先,考虑硬件损耗干扰和多用户干扰等因素,提出新的通信模型与雷达模型。其次,构建具有感知约束和功率约束的能效最大化问题,并将该非凸问题分解为两个子问题。最后,利用基于近似优化方法的分数规划和加权正交匹配追踪算法,分别实现射频链选择子问题和混合预编码设计子问题的优化求解。仿真结果表明,所提机制方案不仅实现了系统能效最大化,同时实现了通信性能与感知性能之间的折中优化。
To address the issues of low energy efficiency and high hardware costs in millimeter wave massive MIMO dual-functional radar communication systems,a novel model is proposed to tackle the problem of maximizing the energy efficiency.Firstly,considering factors such as the interference caused by hardware imperfections and multi-user interference,we propose a new communication model and radar model.Secondly,we formulate an energy efficiency maximization problem with constraints of sensing and power,and this non-convex problem is decomposed into two sub-problems.Finally,the optimization solutions for the RF chain selection sub-problem and the hybrid precoding design sub-problem are achieved by using fractional programming based on approximate optimization methods and the weighted orthogonal matching pursuit algorithm,respectively.The simulation results show that the proposed mechanism not only maximizes the energy eficiency of the system but also realizes an optimization for the trade-off between radar and communication performance.
作者
刘嘉宁
赵千禧
王帝文
田峰
LIU Jianing;ZHAO Qianxi;WANG Diwen;TIAN Feng(Key Laboratory of Broadband Wireless Communication and Sensor Network Technology,Ministry of Education,Nanjing University of Posts and Telecommunication,Nanjing 210003,China;Unicom Internet of Things Co.,Ltd.,Nanjing 210001,China)
出处
《移动通信》
2024年第6期27-33,共7页
Mobile Communications
关键词
双功能雷达通信
能量效率
射频链
混合预编码
Dual-Function Radar Communication(DFRC)
Energy efficiency(EE)
Radio Frequency(RF)
Hybrid Precoding(HP)
