基于混合算法的MIMO雷达正交多相码设计

Design of orthogonal polyphase code for MIMO radar based on hybrid algorithm

提出了一种基于遗传算法和禁忌搜索算法的多输入多输出雷达正交多相码波形设计方法,并将其用于类零相关正交多相码的设计。将禁忌搜索算法引入遗传算法,充分考虑遗传算法的全局收敛性和禁忌搜索算法的局部收敛性。为给禁忌搜索算法一个好的初始解,先用遗传算法优化到一定程度再用禁忌搜索算法,即遗传算法迭代多次,禁忌搜索算法迭代一次。采用最优保存策略来避免最优解丢失,使发射信号的自相关峰值旁瓣和互相关峰进一步降低,提高主副比。仿真结果验证了所提方法的可行性和有效性。

A method based on genetic algorithm and tabu search algorithm is proposed to design an orthogo- nal polyphase code for multiple input multiple output （MIMO） radar, and is used to design a zero correlation zone like orthogonal polyphase code. The tabu search algorithm is introduced to the genetic algorithm to he a part of the hybrid algorithm. This hybrid algorithm takes the global convergence ability of genetic algorithm and the local convergence ability of the tabu search algorithm into account. In order to take a good initial result for the tabu search algorithm, it will not be adopted until the genetic algorithm has optimized to a certain extent. Namely the tabu search algorithm only iterates once when the genetic algorithm iterates several times. The opti- mum preserved strategy is used to avoid the best solution to be lost, which reduces the autocorrelation peak sidelobe and cross-correlation peak and improves the mainlobe-to-sidelobe ratio. Simulation results show that the proposed method is feasible and effective.