直升机载火控雷达抗干扰捷变波形优化算法

Optimization of Anti⁃jamming Agile Waveform for Helicopter Borne Fire Control Radar

针对直升机载火控雷达面向抗干扰的捷变波形优化问题,基于奇异值分解(Singular value decomposition,SVD)和循环算法提出了适用于多脉冲和短码长的捷变相位编码波形设计方法。本文首先通过构造具有目标区域低旁瓣模糊函数的带约束四次型优化问题,然后根据SVD分解将四次型转化为二次型,给出了迭代收敛的优化算法;同时在循环算法基础上给了一种四次型的循环迭代收敛算法。最后仿真结果表明,两种算法在设计捷变波形优化性能上接近,但SVD分解算法收敛速度更快,循环计算算法具有更高的运算速度。

For the optimization of anti-jamming agile waveform for helicopter borne fire control radar,an agile phase coding waveform suitable for multi-pulse and short code length is designed based on singular value decomposition(SVD)and cyclic algorithm.First,we construct the constrained quadric optimization problem with low sidelobe ambiguity function in the target region.Second,the quartic is transformed into the quadric according to SVD decomposition,and an iterative convergence algorithm is designed.Third,a quadric iterative convergence algorithm is deduced based on the cyclic algorithm.Finally,the simulation results show that the two algorithms are close to each other in the design of agile waveform optimization performance,but the SVD decomposition algorithm has faster convergence speed,and the cycle calculation algorithm has higher operation speed.