A Blind Beamforming Algorithm Based on Time-Frequency Analysis Technology

In order to achieve the signal fusion of Doppler radar array under the condition of low signal-to-noise ratio, a blind beamforming algorithm based on time-frequency analysis technology is proposed. The algorithm first performs a fractional Fourier transform on the received signal to estimate its parameters, and then estimates the time-frequency curve of the received signal, calculates Steering vector by the time-frequency point based on the time-frequency estimation curve on the spectrum, and finally use the Capon method for beamforming. Theoretical analysis and experiments show that the performance of the algorithm in this paper is stable, and it can acheive the reception of the desired signal and the suppression of interference noise.