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Joint angle and delay estimation for reduced dimension space-time RAKE receiver with application to IS-95 CDMA uplink

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2 Author(s)
Zoltowski, M.D. ; Sch. of Electr. & Comput. Eng., Purdue Univ., West Lafayette, IN, USA ; Yung-Fang Chen

We propose an algorithm for joint estimation of the angle of arrival (AOA) and delay of each dominant multipath for the desired user for use in a reduced dimension space-time RAKE receiver for DS-CDMA communications that is “near-far” resistant. After we estimate the desired spatio-frequency signal vector, we propose the 2D unitary ESPRIT algorithm as our estimator which provides closed-form as well as automatically paired AOA-delay estimates. We effectively have a single snapshot of 2D data and thus require 2D smoothing for extracting multiple snapshots. The comparative performance of two 2D smoothing schemes, pre-eigenanalysis and post-eigenanalysis to smoothing, is discussed. The space-time data model for the IS-95 uplink is presented. The performance of a reduced dimension space-time RAKE receiver for the IS-95 uplink using the AOA-delay estimates is assessed through Monte-Carlo simulations

Published in:

Spread Spectrum Techniques and Applications, 1998. Proceedings., 1998 IEEE 5th International Symposium on  (Volume:2 )

Date of Conference:

2-4 Sep 1998

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