Title :
Beamspace DOA estimation algorithms with robustness against fast-moving strong interferers
Author :
Feng, Jie ; Yang, Yixin ; Sun, Chao
Author_Institution :
Inst. of Acousti. Eng., Northwestern Polytech. Univ., Xi´´an
Abstract :
All beamspace DOA (direction of arrival) estimation algorithms are based on the beam outputs and the beamformers play an important role in providing high quality beam output data for further processing. In this paper, robust Capon beamformer (RCB) combined with null-broadening technique is applied to the element outputs. It can effectively suppress the fast-moving strong interferers outside the beam coverage region and overcome the distortion in beampattern due to array steering vector errors. Performance of beamspace MUSIC using null broadened robust beamformers against fast moving interferer is studied via computer simulation for uniform linear array. The simulation results show that the proposed scheme has good spatial resolution and improved detection probability of weak stationary signals
Keywords :
array signal processing; beam steering; direction-of-arrival estimation; interference suppression; signal detection; array steering vector errors; beam coverage region; beam outputs; beamspace DOA estimation algorithms; beamspace MUSIC; detection probability; direction of arrival estimation algorithm; fast-moving strong interferer suppression; null broadened robust beamformers; null-broadening technique; robust Capon beamformer; uniform linear array; weak stationary signals; Acoustic beams; Array signal processing; Chaos; Covariance matrix; Direction of arrival estimation; Field emitter arrays; Multiple signal classification; Robustness; Sensor arrays; Vectors;
Conference_Titel :
Antennas and Propagation Society International Symposium 2006, IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
1-4244-0123-2
DOI :
10.1109/APS.2006.1711120