Iterative CDMA receiver with EM channel estimation and turbo decoding

Authors:
Don Torrieri;Eser Ustunel;Hyuck M. Kwon;Seunghyun Min;Dong H. Kang
Affiliations:
Army Research Laboratory, Adelphi, MD;Wichita State University, Wichita, KS;Wichita State University, Wichita, KS;Samsung Electronics, Korea;Samsung Electronics, Korea
Venue:
MILCOM'06 Proceedings of the 2006 IEEE conference on Military communications
Year:
2006

Citing 3
Cited 1

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Turbo codes: principles and applications
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Iterative channel estimation and decoding of pilot symbol assisted turbo codes over flat-fading channels

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Coded DS-CDMA systems with iterative channel estimation and no pilot symbols

IEEE Transactions on Wireless Communications

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Abstract

This paper presents an efficient iterative code-division multiple-access direct-sequence system that uses a turbo code and requires few pilot symbols for carrier estimation and tracking. The signal strength and the noise-power spectral density are separately estimated by applying the expectation maximization (EM) algorithm. The higher throughput of the proposed system relative to a conventional 3rd Generation Partnership Project system is verified through simulations using a Jakes fading environment. The complexity of the proposed EM iterative parameter-estimation scheme is low because the required number of complex multiplications is equal to only four times the fading block size.