Adaptive estimation of the spherical coordinates of multiple broadband targets

摘要

Computer domain adaptive beamforming algorithm for planar arrays are presented. The algorithm is a modified complex LMS adaptive algorithm that can process an arbitrary number of harmonics. The algorithm provides estimates of the sphericalcoordinates(i.e.,range, depresslon angle, and bearlng angle) of multiple ebroadband targets in both the near-field and far-field. Computer simulation results comparing the average range, depression angle, and bearing angle estimation errors as a function of the input signal-to-noise ratio (SNR) at a single element In the array, range (near-field and far-field), and harmonic number, are presented.