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This paper proposes a symmetric co-prime parallel array (S-CPPA) configuration for two-dimensional direction of arrival (2-D DOA) estimation. Specifically, the S-CPPA consists of a co-prime pair of symmetric uniform linear subarrays (ULAs). By vectorizing the cross-correlation matrix of the received signals, the sum and difference coarrays perspective is developed to obtain a large number of degrees...
This paper addresses a partial spatial-differencing (PSD) approach for the direction of arrival estimation in a low-grazing angle (LGA) condition. By dividing the sample covariance matrix into several column subvectors, we first form the corresponding reconstructed subarray covariance matrices (RSCMs). We then calculate the spatial differencing matrix for the noise parts of RSCMs, while the non-noise...
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