针对低重频相参雷达面临的同频干扰、转发式干扰等问题,设计具有低自相关副瓣和互相关峰的捷变相位编码组是一个有效解决手段。根据脉冲积累后的自相关及互相关峰设计代价函数,提出了一种改进的遗传优化算法来搜索捷变相位码组,该算法加入了种群筛选机制和自适应变异概率策略,弥补了基本算法的缺点,提高了算法的收敛速度。仿真结果表明:在搜索捷变编码组方面改进后的算法优于基本遗传算法。

For the problem of interference at same frequency and transpond jamming faced by low pulse repetition frequency coherent radar, one effective solution is to design agility phase-coding group with low self-correlated side-lobe and mutual-correlated peak. Cost function based on self-correlation and mutual-correlation peak after pulse integration is designed, providing one improved generic optimization algorithm for search of agility phase-coding group. Population filtration system and adaptive variance probability strategy are imported by the algorithm, the disadvantage of basic algorithm is made up and convergence velocity of algorithm is increased. The simulation result indicates that the performance of the algorithm with improvement in agility coding group search is better than basic generic algorithm.

TN974