Analysis and Optimization of Ambiguity Function in Radar-Communication Integrated Systems Using MPSK-DSSS
Analysis and Optimization of Ambiguity Function in Radar-Communication Integrated Systems Using MPSK-DSSS
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DOI：
10.1109/lwc.2019.2926708
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发表时间：
2019-07
影响因子：
6.3
通讯作者：
Lan Tang;Ke-min Zhang;Haipeng Dai;Pengcheng Zhu;Ying-Chang Liang
中科院分区：
文献类型：
--
作者：
Lan Tang;Ke-min Zhang;Haipeng Dai;Pengcheng Zhu;Ying-Chang Liang
随着作战平台电磁环境的日益复杂，雷达通信集成引起了人们的广泛关注。本文采用多相移键控直接序列扩频（MPSK-DSSS）信号作为雷达通信集成信号，而不是设计新的集成信号。一方面，得到了平均模糊度函数的封闭表达式，分析了综合信号参数与雷达距离分辨率的关系；另一方面，为了改善随机通信信号对雷达峰值旁瓣电平（PSL）的影响，提出了一种基于发射机序列映射和雷达接收机旁瓣抑制的联合优化方法。仿真结果表明，优化后的集成信号的副瓣电平得到了有效抑制，但通信速率损失较小。
With increasingly sophisticated electromagnetic environment of combat platforms, radar communication integration has attracted wide interests. In this letter, instead of designing a new integrated signal, we employ multiple-phase shift keying direct sequence spread spectrum (MPSK-DSSS) signal as radar communication integrated signal due to its advantage of outstanding correlation. On the one hand, the closed form expression of average ambiguity function is obtained, by which we can analyze the relationship between parameters of integrated signal and radar range resolution. On the other hand, to improve radar peak sidelobe level (PSL) influenced by random communication signals, we propose a joint optimization method based on sequence mapping at the transmitter and sidelobe suppression at the radar receiver. Simulation results show that the sidelobe levels of the optimized integrated signal is effectively suppressed at the cost of slight communication rate loss.