Efficient cyclic prefix reconstruction for coded OFDM systems

Author

Park, Cheol-Jin ; Im, Gi-Hong

Author_Institution

Dept. of Electron. & Electr. Eng., Pohang Univ. of Sci. & Technol., South Korea

Volume

8

Issue

5

fYear

2004

fDate

5/1/2004 12:00:00 AM

Firstpage

274

Lastpage

276

Abstract

This letter describes an improved method to mitigate interference when the cyclic prefix is not sufficient for coded orthogonal frequency-division multiplexing (OFDM) systems. The proposed method, based on the residual intersymbol interference cancellation (RISIC), efficiently restores the cyclicity of the ith received symbol by adding the weighted (i+1)th received symbol to the ith received symbol. Simulation results show that the proposed scheme outperforms the conventional RISIC in the symbol error rate even when the channel impulse response is longer than a half of the symbol duration.

Keywords

OFDM modulation; interference suppression; intersymbol interference; iterative methods; modulation coding; transient response; channel impulse response; coded OFDM system; coded orthogonal frequency-division multiplexing; cyclic prefix reconstruction; intercarrier interference; iterative cancellation; residual intersymbol interference cancellation; symbol duration; symbol error rate; symbol restoration; AWGN; Decoding; Error analysis; Filtering; Finite impulse response filter; Frequency division multiplexing; Interference cancellation; Interference elimination; Intersymbol interference; OFDM; CP; Cyclic prefix; ICI; ISI; OFDM; intercarrier interference; intersymbol interference; iterative cancellation; orthogonal frequency-division multiplexing; reconstruction;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2004.827439

Filename

1300575