Pilot-aided DOA estimation for CDMA communication systems

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[1] Wang, N.Y.
[2] Agathoklis, P.
[3] Antoniou, A.
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Wang, N. Y. (nwang@ece.uvic.ca) | / Circuits and Systems Society, IEEE CASS; Science Council of Japan; The Inst. of Electronics, Inf. and Communication Engineers, IEICE; The Institute of Electrical and Electronics Engineers, Inc., IEEE卷 / Institute of Electrical and Electronics Engineers Inc.期
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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. © 2005 IEEE.
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