Time domain broadband signal frequency domain closed loop direction-finding method based on digital signal processor

The present invention discloses a time domain broadband signal frequency domain closed loop direction-finding method. The method mainly comprises the thinking: obtaining the digital broadband signal in the mth channel after amplitude and phase error correction and performing the discrete Fourier transform to obtain a frequency domain signal Xm ([Omega]j) of the digital broadband signal in the mth channel after amplitude and phase error correction at the jth frequency point so as to calculate the frequency domain narrow-band signal optimal weight vector Wj at the [Omega]j position of the jth frequency point and the frequency domain signal optimal wave beam formation direction graph yopt ([Omega]j) at the jth [Omega]j point through adoption of the least mean square algorithm until obtaining each frequency domain narrow-band signal optimal weight vector of the j frequency points and each optimal wave beam formation direction graph of the j frequency points after using the least mean square algorithm, performing