双功能雷达通信系统的多用户功率分配算法

Multi-user power allocation algorithm for dual functionradar-communication system

为解决传统多用户双功能雷达通信系统因载波分配导致通信性能较差的问题,提高双功能雷达通信系统的资源利用率,提出了一种通信用户载波共享模型下的多用户功率分配方案,并通过构造合理的资源分配问题使得系统具有更优的通信性能。首先,建立双功能雷达通信系统的通信用户载波共享信号模型。其次,为保证双功能雷达通信系统性能,构造了以系统通信和速率最大并满足雷达信噪比下界、总功率和用户功率约束的优化问题,通过理论分析严格证明了优化问题的可行性。最后,为求解凸优化问题,提出一种多用户功率分配算法,通过引入辅助变量对目标函数进行二次转换,将其分解为两个优化子问题,继而通过交替迭代的方式进行求解。研究结果表明,相较于传统通信用户载波分配模型,优化后的通信用户载波共享模型通信和速率提高了约40%,从而验证了所提方案具有更优的通信性能,有效提高了系统资源利用率。本研究成果为提高多用户双功能雷达通信系统的通信性能提供了一种新思路和手段。

To solve the problem of poor communication performance of traditional multi-user dual-function radar communication system due to carrier allocation and improve the resource utilization rate of dual-function radar communication system,a multi-user power allocation scheme based on the communication user carrier sharing model is proposed,and the system has better communication performance by constructing a reasonable resource allocation problem.Firstly,the model of communication user carrier sharing signal in dual-function radar communication system is established.Secondly,in order to ensure the performance of the dual-function radar communication system,an optimization problem is constructed to maximize the system communication and rate and satisfy the constraints of radar signal-to-noise ratio lower bound,total power and user power.The feasibility of the optimization problem is strictly proved through theoretical analysis.Finally,in order to solve the convex optimization problem,a multi-user power allocation algorithm is proposed,which firstly introduces auxiliary variables to convert the objective function twice,decomposes it into two optimization sub-problems,which are then solved by alternate iteration.The results show that compared with the traditional user carrier allocation model,the communication rate of the optimized user carrier sharing model are increased by about 40%,which verifies that the proposed scheme has better communication performance and effectively improves the utilization rate of system resources.The research results of this paper provide a new idea and means for improving the communication performance of multi-user dual-function radar communication system.