Two-stage Robust Adaptive Array Beamforming

• Main Authors: CHEN, HUNG-CHIA, 陳宏家
• Other Authors: Lee, Ju-Hong
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/43815364052658910433

碩士 === 國立臺灣大學 === 電信工程學研究所 === 91 === Adaptive array beamforming automatically receives the desired signal while canceling the interference and background noise by selecting a optimal weight. The computational complexity of a inverse matrix is very large while obtaining the optimal weight of an adaptive array. To reduce the computational complexity and retain the sensor elements, a two-stage adaptive array was presented in the literature. In this paper, we propose an overlapping two-stage array with MV criteria to obtain the optimal weight of the second stage, which using the estimated noise autocorrelation matrix. We analyze the effect of coherent interference signals and sensor position perturbation on the performance of an overlapping two-stage array. And the efficiency of the presented robust methods in the literature is also discussed on it. Last of all, for blind beamforming based on SCORE algorithm wildly considered recently, we use our overlapping two-stage array concepts again and discuss the performance as the conventional beamformnig before.