Remarks on the spatial smoothing step in coarray MUSIC
Journal
IEEE Signal Processing Letters
Journal Volume
22
Journal Issue
9
Pages
1438-1442
Date Issued
2015
Author(s)
Vaidyanathan, P.P.
Abstract
Sparse arrays such as nested and coprime arrays use a technique called spatial smoothing in order to successfully perform MUSIC in the difference-coarray domain. In this paper it is shown that the spatial smoothing step is not necessary in the sense that the effect achieved by that step can be obtained more directly. In particular, with Rss denoting the spatial smoothed matrix with finite snapshots, it is shown here that the noise eigenspace of this matrix can be directly obtained from another matrix R which is much easier to compute from data.
SDGs
Type
journal article