面向超宽带雷达系统的CPPM微波源设计与实现

超宽带雷达具有抗干扰、高分辨率等特征，本文设计并实现了一种面向超宽带雷达系统的CPPM微波源。CPPM信号由时间间隔随混沌特性变化且宽度和幅值均相同的脉冲序列构成，相关特性和信号带宽分别取决于混沌特性和脉冲宽度。文中数字仿真和FPGA实现了基于logistic映射的脉冲宽度为0.64ns的CPPM信号，带宽可达1.56GHz，并具有较好的相关特性。模糊函数表明该信号可以实现较高的测距和测速精度并具有良好的抗干扰能力。将该CPPM信号作为雷达系统信号源，实验验证了对不同距离目标物的定位，双目标分辨率可达16.5cm，可以实现目标物的精确定位。

Design and implementation of CPPM microwave source for UWB radar system

Ultra-wideband radar has the characteristics of anti-interference and high resolution. This paper designs and implements CPPM microwave source for ultra-wideband radar system. The CPPM signal is composed of pulse sequences. The time delay between pulse sequences varies chaotically and every pulse has identical width and amplitude. The correlation property and the bandwidth of the signal depend on the chaotic characteristics and pulse-width, respectively. The CPPM signal based on logistic map is implemented by numeric simulation and FPGA, which own pulse-width of 0.64ns, bandwidth of 1.56GHz and good correlation property. Ambiguity function shows that the signal has the advantages of high range and speed measuring precision and a good anti-interference ability. The CPPM signal is used as the signal source of radar system. And experimental results show that the system can accurately locate the position of the target and the resolution of double targets can reach 16.5cm.