杂波环境中雷达通信一体化系统波形设计算法研究

Waveform Design for Dual-function Radar-communication Systems in Clutter

针对杂波环境中雷达通信一体化系统探测性能下降的问题,该文以信干噪比作为设计准则,通过联合优化系统发射波形和接收滤波器来抑制杂波,进而增强目标探测性能。为同时保证系统信息传输的质量,将通信信号的多用户干扰能量纳入约束条件。此外,引入相似性约束使得发射波形具有良好的模糊函数。为求解发射波形和接收滤波器联合优化问题,提出了一种基于循环优化和半正定松弛的迭代算法。理论分析证明了算法的收敛性。仿真结果表明,所设计的波形不仅可以提升系统在杂波环境中的目标探测性能,而且可以高效地实现多用户通信。

To prevent the degradation of the detection performance of Dual-Function Radar-Communication(DFRC)system in the presence of clutter,we propose the joint design of a transmit waveform and receiver filter to suppress the clutter and enhance the target detection performance.We use the Signal-to-Interferenceplus-Noise Ratio(SINR)as the design criterion.Meanwhile,the Multi-User Interference(MUI)energy of the communication signals is constrained to maintain the quality of service for information transmission via DFRC systems.In addition,a similarity constraint is enforced to enable the transmitted waveform to have a good ambiguity function.To tackle the joint optimization problem,we present an iterative algorithm based on cyclic optimization and Semi-Definite Relaxation(SDR).The convergence of the algorithm is proved by a theoretical analysis.The simulation results show that the designed waveform can improve the target detection performance of a DFRC system in clutter and efficiently realize multi-user communication.