AN ANALYSIS OF WEIGHTED EIGENSPACE METHODS IN THE PRESENCE OF SENSOR ERRORS

Among all direction finding methods, eigenspace-based spectral methods are of interest because they are known to yield asymptotically unbias ed and efficient estimates, These algorithms require knowledge of the array geometry and its elements' characteristics. In real systems, onl y approximate knowledge of the required array characterization is avai lable, There is valid concern that deviation of nominal sensor gain an d phase values call result in degradation of DOA estimates. In this pa per, we analyze the effects of sensor gain and phase perturbation on w eighted eigenspace methods (WEM's), We quantify the sensitivity of WEM 's by first- and second-order statistical analyses, Simulation results are included to validate our analytical results.