滤波求和方式实现宽带波束形成，FIR 底通和带通滤波器和IIR 底通和带通滤波器，详细画出了时域和频域的相关图。- Filtering summation way broadband beamforming, Bottom-pass and band-pass FIR and IIR filter bottom pass and band-pass filter, Correlation diagram shown in detail the time domain and frequency