基于遗传算法的部分自适应波束形成方法

将一种改进的遗传算法用于星载平面阵列天线方向图的实时综合。为了使遗传算法适合实时应用,在唯相自适应阵列的基础上进一步采用了部分阵元和部分比特的自适应波束形成,以降低算法计算量,提高其收敛速度。对基于改进遗传算法的唯相阵列部分阵元自适应波束形成和部分比特自适应波束形成进行了研究。模拟实验结果表明,两种方案都能够在波束“凝视”方向满足一定增益的前提下有效抑制来自旁瓣的强干扰,而且具有比传统唯相算法更快的收敛速度。

Partially adaptive baeam-forming maethods based on genetic algorithms

An improved genetic algorithm(GA) for real time beam-forming of onboard planar array was presented. In or-der to meet the real-time processing requirements, this GA was combined with partially adaptive beam-forming tech-niques in the phase-only adaptive array, which can decrease the calculation complexity, and speed up its convergence rates. Two partially adaptive schemes, partial elements and partial bits adaptive beam-forming, were discussed with the genetic algorithm. The computer simulations show that the above two methods can null interferences located on the sidelobe regions, while the mainlobe can keep the satisfying gain levels at the angle of beam-pointing. Moreover, they offer the advantage of faster convergence rates over phase-only algorithm.