一种基于遗传算法的正交波形设计方法

An Orthogonal Waveform Design Method Based on Genetic Algorithm

数字阵列雷达可通过子阵组合,发射多波束等方式实现同时搜索和跟踪不同空域目标,其中发射正交波形设计是数字阵列雷达的关键技术之一。本文以降低波形信号的自相关旁瓣峰值及互相关峰值为目标,采用改进的遗传算法对随机生成的四相码波形信号进行正交优化。仿真表明,优化设计的正交四相码波形相比于其他文献在自相关旁瓣峰值及互相关峰值性能上有较大改善。

Digital array radar can search and track multiple targets in different areas simultaneously by using sub-arrays and multi-beam transmitting signals.The design of orthogonal waveforms is a key point of digital array radar.To reduce the autocorrelation sidelobe peak and cross-correlation peak of designed signals,we use an improved genetic algorithm to optimize the orthogonality of randomly generated quadriphase coded waveforms.Simulation results show that the designed orthogonal quadriphase coded waveforms have much better performance than those described in available literature in terms of autocorrelation sidelobe peak and cross-correlation peak.