由于信号波形的“随机性冶易于实现“捷变冶,多相码序列在一定程度上可以提高雷达系统的抗截获能力,在雷达系统中得到广泛应用。文中采用自适应遗传算法进行全局搜索来优化多相码设计,以获得主副瓣比接近理论最优的多相编码。针对小时带宽积相位编码信号高脉压副瓣的特点,提出基于迭代加权最小二乘算法的预失配滤波器设计方法,从而降低多相码序列的脉压副瓣并扩展多普勒容限。通过仿真分析,验证了该方法的可行性及有效性。

The poly-phase sequence is widely applied to the radar system due to its randomicity, which can increase the anti-interception capability of the radar system to a certain extent. The adaptive genetic algorithm is introduced in this paper to optimize the poly-phase codes by global searching. On account of its high pulse compression sidelobes of the poly-phase sequence in small time bandwidth product, the iteratively reweighted least-square mismatched filter design is proposed to expand Doppler tolerance and further suppress the sidelobes. The feasibility and validity of the method is demonstrated by results of simulations.

TN957