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A scheme for cancelling intercarrier interference using conjugate transmission in multicarrier communication systems

Yeh, Hen-Geul and Chang, Yuan-Kwei and Hassibi, Babak (2007) A scheme for cancelling intercarrier interference using conjugate transmission in multicarrier communication systems. IEEE Transactions on Wireless Communications, 6 (1). pp. 3-7. ISSN 1536-1276. doi:10.1109/TWC.2007.04541.

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To mitigate intercarrier interference (ICI), a two-path algorithm is developed for multicarrier communication systems, including orthogonal frequency division multiplexing (OFDM) systems. The first path employs the regular OFDM algorithm. The second path uses the conjugate transmission of the first path. The combination of both paths forms a conjugate ICI cancellation scheme at the receiver. This conjugate cancellation (CC) scheme provides (1) a high signal to interference power ratio (SIR) in the presence of small frequency offsets (50 dB and 33 dB higher than that of the regular OFDM and linear self-cancellation algorithms [1], [2], respectively, at ΔfT = 0.1% of subcarrier frequency spacing); (2) better bit error rate (BER) performance in both additive white Gaussian noise (AWGN) and fading channels; (3) backward compatibility with the existing OFDM system; (4) no channel equalization is needed for reducing ICI, a simple low cost receiver without increasing system complexity. Although the two-path transmission reduces bandwidth efficiency, the disadvantage can be balanced by increasing signal alphabet sizes.

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Additional Information:© Copyright 2007 IEEE. Reprinted with permission. Manuscript received August 19, 2004; revised June 30, 2005 and December 16, 2005; accepted January 4, 2006. [Posted online: 2007-02-26] The associate editor coordinating the review of this letter and approving it for publication was C. Tellambura. This work was partly supported by the University Research Office, California State University, Long Beach (CSULB). The authors would like to thank the anonymous reviewers and Editor for their valuable constructive comments and suggestions that have considerably improved this paper.
Subject Keywords:Algorithm, fading channels, intercarrier interference cancellation, OFDM.
Issue or Number:1
Record Number:CaltechAUTHORS:YEHieeetwc07
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:7550
Deposited By: Archive Administrator
Deposited On:02 Mar 2007
Last Modified:08 Nov 2021 20:43

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