基于幅相控制的雷达-通信一体化系统稳健波形设计方法

A Robust Waveform Design Method for Dual-Function Radar Communication System Based on Amplitude Phase-modulation

为克服现有基于旁瓣电平控制的雷达-通信一体化系统对通信设备方向信息要求高的不足,同时有效提升雷达系统的通信信息传输能力,以多输入多输出(multiple input multiple output,MIMO)雷达为平台,研究了雷达-通信一体化系统发射加权矩阵的稳健设计方法。首先,为解决通信方向误差引起合成信号的畸变问题,以方向误差集内通信信号与期望信号的最差匹配性能为约束,构建了通信方向存在误差时的发射加权矩阵的稳健优化模型,并采用循环算法和凸优化方法对其进行求解;其次,利用通信方向多个合成信号的联合映射关系,提出了基于幅相控制的通信信息植入策略,由于利用了合成信号的幅相排列信息,相比传统方法能够更易实现通信信息的高速率传输;最后仿真实验表明了所提方法的有效性。

In order to overcome the deficiency of the existing radar-communication integrated system based on sidelobe level control,which requires high directional information of communication equipment,and effectively improve the communication information transmission capability of radar system,the robust design method of transmission weighting matrix of radar-communication integrated system is studied on the platform of multiple input multiple output(MIMO)radar.Firstly,in order to solve the distortion problem caused by the communication direction error,a robust optimization model of the transmission weighted matrix with the communication direction error was constructed under the constraint of the worst matching performance between the communication signal and the desired signal in the direction error set,and the cyclic algorithm and convex optimization method were used to solve the problem.Secondly,a communication information implantation strategy based on amplitude-phase control is proposed based on the joint mapping relationship of multiple synthetic signals in the communication direction.Due to the use of the amplitude and phase arrangement information of the synthetic signal,it is easier to realize the high-speed transmission of communication information than the traditional method.Finally,simulation results show the effectiveness of the proposed method.