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Test of orthogonality of projected subspaces (TOPS) estimates directions of arrival of wideband sources by exploiting orthogonality between signal and noise subspaces in spectral domain. TOPS performs well at mid signal-to-noise ratio (SNR) range, but fares poorly at high SNR and noise-free cases. The TOPS pseudospectrum often exhibits spurious peaks at all SNR levels. This paper attempts to explain...
A novel method for signal subspace processing in the beamspace of a true time delay (TTD) beamformer bank is presented. The method permits the directions of arrival of broadband sources to be estimated accurately, efficiently and non-iteratively. This is achieved by exploiting the properties of the TTD beamformer bank, which simultaneously introduces spatial diversity into the data set while maintaining...
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