Robust beam forming method based on maximum posterior probability and covariance matrix reconstruction

• Main Authors: LI WOLIN, QU XIAODONG, ZHANG ZHENGYAN, HAN BOWEN, YANG XIAOPENG
• Format: Patent
• Language: Chinese; English
• Published: 23.06.2023
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING; TRANSMISSION

The invention discloses a robust beam forming method based on maximum posterior probability and covariance matrix reconstruction, and aims to solve the problem of steering vector mismatch caused by uncertainty of the incoming direction of an expected signal, and the accurate incoming direction of the expected signal is estimated by using a maximum posterior probability method. In this way, mismatched desired signal steering vectors are corrected essentially, and desired signal components are removed from a sampling covariance matrix in combination with a covariance matrix reconstruction method, so that the purposes of avoiding a desired signal cancellation phenomenon and improving system output SINR performance are achieved. A Gaussian-Chebyshev quadrature formula is deduced to calculate a reconstructed interference and noise covariance matrix, so that the calculation complexity is greatly reduced, and the efficiency of the method is improved; the method is applied to radar anti-interference, and can obtain b