An iterative technique to achieve enhanced spectral resolution

An iterative technique, called iterative MUSIC (ITM), is introduced that achieves enhanced resolution performance equivalent to MUSIC´s without performing the eigensystem decomposition of the array correlation matrix. The technique can be modified to accommodate a signal-space or a noise-space spectral resolution algorithm. Simulation results are included that compare the relative performance of the derived iterative technique and MUSIC. It is shown that the spectral estimation performance of ITM with three iterations is similar to that of MUSIC for signal-to-noise ratios in the range from 0 to 30 dB