Extension of nested arrays with the fourth-order difference co-array enhancement

Qing Shen; Wei Liu; Wei Cui; Siliang Wu

ICASSP 2016accepted0 citations

Extension of nested arrays with the fourth-order difference co-array enhancement

Abstract

To reach a higher number of degrees of freedom by exploiting the fourth-order difference co-array concept, an effective structure extension based on two-level nested arrays is proposed. It increases the number of consecutive lags in the fourth-order difference coarray, and a virtual uniform linear array (ULA) with more sensors and a larger aperture is then generated from the proposed structure, leading to a much higher number of distinguishable sources with a higher accuracy. Compressive sensing based approach is applied for direction-of-arrival (DOA) estimation by vectorizing the fourth-order cumulant matrix of the array, assuming non-Gaussian impinging signals.

BibTeX

@inproceedings{icassp2016_extensionofneste,
  title = {Extension of nested arrays with the fourth-order difference co-array enhancement},
  author = {Qing Shen and Wei Liu and Wei Cui and Siliang Wu},
  booktitle = {ICASSP 2016},
  year = {2016}
}