Title :
A robust algorithm for linearly constrained adaptive beamforming
Author :
Zou, Qiyue ; Yu, Zhu Liang ; Lin, Zhiping
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore
Abstract :
A new approach to robust adaptive beamforming for wideband array signals is proposed. General steering vector errors, such as direction-of-arrival mismatch and array positional error, are modeled by "time-delay errors" and compensated for by self-adjusted interpolation filtering. The proposed method effectively overcomes the target-signal cancellation problem without suffering from loss in the degree of freedom for interference rejection, as verified by simulations.
Keywords :
adaptive signal processing; array signal processing; delays; filtering theory; interpolation; adaptive processing; array positional error; direction-of-arrival mismatch; interference rejection; linearly constrained adaptive beamforming; linearly constrained beamforming; self-adjusted interpolation filtering; steering vector errors; target-signal cancellation problem; time-delay errors; wideband array signals; Adaptive arrays; Array signal processing; Delay effects; Error correction; Interference constraints; Interpolation; Robustness; Sensor arrays; Signal processing algorithms; Wideband;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2003.819354
