TY - GEN
T1 - Broadband constant beamwidth beamforming for suppressing mainlobe and sidelobe interferences
AU - Li, Shuai
AU - Yang, Xiaopeng
AU - Ning, Liyue
AU - Long, Teng
AU - Sarkar, Tapan K.
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2017/6/7
Y1 - 2017/6/7
N2 - The constant beamwidth beamforming is a key technique and research focus in the broadband array signal processing. However, most conventional methods can only satisfy constant mainlobe width and the performance will degrade severely when mainlobe and sidelobe interferences exist. To overcome this problem, a broadband constant beamwidth beamforming for suppressing mainlobe and sidelobe interferences is proposed. In the proposed method, the modified blocking matrices of different frequency bins are firstly constructed for mainlobe interference cancellation in the data domain, afterward, the minimum variance distortionless response (MVDR) beamformer and Zatman method are adopted to determine the adaptive weight vector of the reference frequency for robust interference suppression. Finally, the adaptive weight vectors of the other frequency bins are calculated using second-order cone programming (SOCP). The proposed method can form the same mainlobe width and null characteristics over the entire design frequency range. The effectiveness of the proposed method is verified by numerical simulations.
AB - The constant beamwidth beamforming is a key technique and research focus in the broadband array signal processing. However, most conventional methods can only satisfy constant mainlobe width and the performance will degrade severely when mainlobe and sidelobe interferences exist. To overcome this problem, a broadband constant beamwidth beamforming for suppressing mainlobe and sidelobe interferences is proposed. In the proposed method, the modified blocking matrices of different frequency bins are firstly constructed for mainlobe interference cancellation in the data domain, afterward, the minimum variance distortionless response (MVDR) beamformer and Zatman method are adopted to determine the adaptive weight vector of the reference frequency for robust interference suppression. Finally, the adaptive weight vectors of the other frequency bins are calculated using second-order cone programming (SOCP). The proposed method can form the same mainlobe width and null characteristics over the entire design frequency range. The effectiveness of the proposed method is verified by numerical simulations.
KW - Constant beamwidth
KW - Mainlobe and sidelobe interferences
KW - Minimum variance distortionless response (MVDR)
KW - Modified blocking matrices
KW - Second-order cone programming (SOCP)
KW - Zatman method
UR - http://www.scopus.com/inward/record.url?scp=85021455602&partnerID=8YFLogxK
U2 - 10.1109/RADAR.2017.7944358
DO - 10.1109/RADAR.2017.7944358
M3 - Conference contribution
AN - SCOPUS:85021455602
T3 - 2017 IEEE Radar Conference, RadarConf 2017
SP - 1041
EP - 1045
BT - 2017 IEEE Radar Conference, RadarConf 2017
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2017 IEEE Radar Conference, RadarConf 2017
Y2 - 8 May 2017 through 12 May 2017
ER -