Title :
Autocalibration Algorithm for Robust Capon Beamforming
Author :
Kikuchi, Shohei ; Tsuji, Hiroyuki ; Sano, Akira
Author_Institution :
Sch. of Integrated Design Eng., Keio Univ., Yokohama
Abstract :
The robust Capon beamformer (RCB) is more robust than the standard Capon beamformer when there is uncertainty, as in the case of a sensor location error or an array model mismatch. However, the RCB suffers from mutual coupling between the array sensors, which is difficult to neglect in practice. In this work, an autocalibration algorithm is described that improves the RCB by recursively calibrating the uncertainty due to mutual coupling. The proposed method is better able to estimate the angle-of-arrival and power of the signal of interest than the RCB, as shown by numerical simulation and practical analysis of experimental data obtained in an anechoic chamber
Keywords :
array signal processing; direction-of-arrival estimation; anechoic chamber; angle-of-arrival estimation; autocalibration algorithm; mutual coupling; robust Capon beamforming; Array signal processing; Covariance matrix; Interference; Mutual coupling; Numerical simulation; Phased arrays; Robustness; Sensor arrays; Signal processing algorithms; Uncertainty; Angle-of-arrival estimation; autocalibration; power estimation; robust Capon beamforming (RCB);
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2006.874070