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To enhance the passive direction-of-arrival (DOA) estimation performance of a volumetric array in high noise and strong interference background, a new DOA estimation method based on Fourier integral method (FIM) and inverse beamforming (IBF) is proposed. This method combines the two methods and thus obtains the interference cancelling capability of IBF and the noise suppression ability of FIM simultaneously...
Blind beamforming algorithms have the ability to recover the desired signals from array outputs without any prior knowledge of the array geometry. After blind separation of the signals, the DOAs can be estimated for each source individually. In this paper, the performance of the multistage constant modulus (CM) array, one of the most striking blind beamforming algorithms, for the source DOA estimation...
All beamspace DOA (direction of arrival) estimation algorithms are based on the beam outputs and the beamformers play an important role in providing high quality beam output data for further processing. In this paper, robust Capon beamformer (RCB) combined with null-broadening technique is applied to the element outputs. It can effectively suppress the fast-moving strong interferers outside the beam...
A new method is proposed to detect the number of signals and estimate their directions-of-arrival (DOAs) in the multipath channels. Based on the coherency among signals, multiple independent sources resulted from multipaths are automatically divided into several independent groups from the multistage constant modulus array with power signal detector, and the spatial signature corresponding to each...
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