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Multiple antenna systems with sub-Nyquist sampling technique have been applied to jointly estimate frequency and direction-of-arrival of narrowband far-field signals. Unlike the current some techniques, where only one signal can be handled in some certain subband, the authors propose a novel technique to deal with the case of multiple signals. The authors first build a new time-space union model for...
This paper proposes an efficient direction-of-arrival (DOA) estimation algorithm for wideband signals from data collected using two sensors. Like the traditional wideband methods, this algorithm first decomposes wideband sources into narrowband bins. At each frequency bin, the cross-correlation between sensors is estimated to construct a Toeplitz matrix, which contains all angle information. Thus...
In this paper, a new algorithm of frequency and 2-D DOA (direction-of-arrival) joint estimation employing L-shape arrays using pseudocovariance matrices is addressed. Firstly, pseudocovariance matrices are constructed using the covariance of sensors along the z-axis and x-axis respectively. Then signal subspaces are obtained using singular value decomposition (SVD) technique for the two pseudocovariance...
A new fast and accurate method for estimating the frequency of a complex sinusoid in complex white Gaussian environments is proposed. Inspired by the works of Kay and Kim et al., the method is based on the differential phase measurements with an arbitrary delay. This approach is different from the Kim et al. method and needs much less computational operations, yet produces very comparable performance...
A novel algorithm for estimating the frequency of a single complex sinusoid in complex white Gaussian noise is proposed. The proposed discrete Fourier transform based algorithm performs a frequency interpolation on the results of an N point complex Fourier transform very well with a novel residue frequency discriminator. Simulation results are included to demonstrate that the estimator is unbiased...
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