ANGLE AND WAVE-FORM ESTIMATION VIA RELAX

Described here is how the RELAX algorithm, recently proposed for tempo ral spectral analysis, can be extended to the spatial problem of angle and waveform estimation for both narrowband and wideband plane waves arriving at a uniform linear array (ULA). Both numerical and experimen tal examples are used to demonstrate the performance of the RELAX algo rithm and compare the performance of RELAX I with that of other well-k nown algorithms including ESPRIT with forward/backward spatial smoothi ng, MODE/WSF, and AP/ANPA for narrowhand signals, and CSM-ESPRIT for w ideband signals.