Design of Novel Time-Domain Equalizer (TEQ) for OFDM Systems

Lan YANG
Chung Gu KANG

Publication
IEICE TRANSACTIONS on Communications   Vol.E89-B    No.10    pp.2940-2944
Publication Date: 2006/10/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.10.2940
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
OFDM,  intersymbol interference,  time domain equalizer,  least mean square,  

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Summary: 
In a typical OFDM system, a time domain equalizer (TEQ) can be used in order to reduce the channel length, allowing for shortening of the Cyclic Prefix (CP). In this paper, a novel TEQ method is proposed for OFDM systems, which can reduce implementation complexity without sacrificing performance. Furthermore, the length of the proposed TEQ may be arbitrary. For time-varying channels, an adaptive method is also developed to track the variation of the optimum TEQ coefficients rather than recomputing inversion of the channel matrix.