Array Manifold Measurement In The Presence Of Multipath

We present an algorithm for the calibration of sensor arrays in the presence of multipath. The algorithm is based on two sets of calibration data obtained from two angularly separated transmitting points. Simulation results demonstrating the performance of the algorithm are included. 1. INTRODUCTION Modern superresolution direction finding techniques such as MUSIC [1], Maximum Likelihood [7], and subspace fitting methods [5], presume the knowledge of the array response. As the analysis of these techniques show, [3], [4], any inaccuracy in the presumed array response results in severe degradation of performance. The measurement of the array response, referred to as array calibration, is therefore a crucial step in the implementation of these techniques. The existing calibration techniques, [2], [6], are based on modeling the array response by a freespace model perturbed by an unknown coupling matrix and sensor location uncertainty. In this paper we address the problem of measuring the ..