基于kaiser窗的双谱线插值FFT谐波分析，包括随机梯度算法，相对梯度算法，相参脉冲串复调制信号，滤波求和方式实现宽带波束形成。- Dual-line interpolation FFT harmonic analysis kaiser windows, Including stochastic gradient algorithm, the relative gradient algorithm, Complex modulation coherent pulse train signal, Filtering summation way broadband beamforming.