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Shen, Q.; Liu, W.; Cui, W.; Wu, S.L. (2016)
Languages: English
Types: Other
Subjects:
To reach a higher number of degrees of freedom by exploiting the\ud fourth-order difference co-array concept, an effective structure extension\ud based on two-level nested arrays is proposed. It increases\ud the number of consecutive lags in the fourth-order difference coarray,\ud and a virtual uniform linear array (ULA) with more sensors\ud and a larger aperture is then generated from the proposed structure,\ud leading to a much higher number of distinguishable sources with\ud a higher accuracy. Compressive sensing based approach is applied\ud for direction-of-arrival (DOA) estimation by vectorizing the fourthorder\ud cumulant matrix of the array, assuming non-Gaussian impinging\ud signals.
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