Pilot-aided DOA estimation for CDMA communication systems
ISCAS(2005)
Abstract
A pilot-aided direction-of-arrival estimation technique for code-division multiple access systems is proposed. The direction of arrival is estimated based on the computation of the phase shift between the reference signal and its phase-shifted version, which is obtained through subarray beamforming. Since the directions of arrival are estimated after interference rejection, the effect of co-channel interference on the estimation is significantly reduced. Further, since subspace estimation and eigendecomposition are not required, the proposed technique is computationally simpler than existing direction-of-arrival estimation techniques. Extensive simulations show that the proposed technique offers significantly improved estimation capacity, accuracy, and tracking capability relative to existing techniques.
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Key words
array signal processing,cochannel interference,code division multiple access,direction-of-arrival estimation,interference suppression,CDMA communication systems,accuracy,cochannel interference,code-division multiple access systems,eigendecomposition,estimation capacity,interference rejection,phase shift computation,pilot-aided DOA estimation,pilot-aided direction-of-arrival estimation,subarray beamforming,subspace estimation,tracking capability
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