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Published September 2015 | public
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Remarks on the Spatial Smoothing Step in Coarray MUSIC

Liu, Chun-Lin ORCID icon
Vaidyanathan, P. P. ORCID icon
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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 R_(ss) 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.

Additional Information

© 2015 IEEE. Manuscript received January 16, 2015; revised February 24, 2015; accepted February 27, 2015. Date of publication March 05, 2015; date of current version March 09, 2015. This work was supported in parts by ONR Grant N00014-11-1-0676, and by the California Institute of Technology. The associate editor coordinating the review of this manuscript and approving it for publication was Prof. Joseph Tabrikian.

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August 20, 2023
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October 20, 2023