An OFDM Scheme with Pre-IDFT/DFT on Frequency-Selective Rayleigh Fading Channels

Jeong-Woo JWA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E88-B   No.7   pp.3073-3077
Publication Date: 2005/07/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.7.3073
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
orthogonal frequency division multiplexing (OFDM),  equalization,  interleaving,  multipath fading,  

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Summary: 
In this paper, we propose an OFDM scheme with pre-IDFT/DFT and the frequency domain equalization on frequency-selective Rayleigh fading channels. In this scheme, a two-dimensional block interleaving is used to randomize the correlated noise caused by the frequency domain linear equalizer. Then, the pre-DFT averages the interleaved noise enhancement and improves the error performance of the proposed scheme. Computer simulations confirm the bit error probability of the proposed scheme for multilevel modulations.