Anovel algorithm of inter-subchannel interference cancellation for OFDM systems

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Orthogonal frequency-division multiplexing (OFDM) transmission has inter-subchannel interference (ICI) in fast fading environment. Several algorithms have been proposed to reduce the ICI effects. Among these algorithms, the ICI self-cancellation schemes [3, 4] needs not to estimate the multipath responses, and its performance doesn't depend on the signal-to-noise ratio (SNR). In [4], the pre-processor in the transmitter extends the original symbol interval to obtain diversity that can be used by the post-processor of the receiver to make ICI self-cancelled. When the original symbol interval is doubled and the multipath channels vary linearly with time within the extended symbol interval, this algorithm can completely the ICI. However, the complexity of the post-processor in [4] is not low. It needs N +1 parallel fast-Fourier transforms (FFT). Moreover, there is no performance comparison between [3] and [4]. In this paper, we continue our work in [4] and propose an equivalent low-complexity post-processor that needs only one FFT. We also give analyze the variance of the residual ICI and derive an bit-error probability (BEP) upper bound. Furthermore, we compare the performance of our algorithm with Zhao's algorithm and give some related discussion.

Original languageEnglish
Title of host publicationMulti-Carrier Spread-Spectrum - Proceedings from the 5th International Workshop
Pages75-82
Number of pages8
Publication statusPublished - 2006 Dec 1
Event5th International Workshop on Multi-Carrier Spread-Spectrum, MC-SS 2005 - Oberpfaffenhofen, Germany
Duration: 2005 Sep 142005 Sep 16

Publication series

NameMulti-Carrier Spread-Spectrum - Proceedings from the 5th International Workshop

Other

Other5th International Workshop on Multi-Carrier Spread-Spectrum, MC-SS 2005
CountryGermany
CityOberpfaffenhofen
Period05-09-1405-09-16

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications

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  • Cite this

    Chang, M-X. (2006). Anovel algorithm of inter-subchannel interference cancellation for OFDM systems. In Multi-Carrier Spread-Spectrum - Proceedings from the 5th International Workshop (pp. 75-82). (Multi-Carrier Spread-Spectrum - Proceedings from the 5th International Workshop).