Frequency-Domain Equalization with Iterative Block Noise-Prediction for Single-Carrier Systems

Ang FENG  Qinye YIN  

Publication
IEICE TRANSACTIONS on Communications   Vol.E92-B   No.8   pp.2747-2750
Publication Date: 2009/08/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E92.B.2747
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
single-carrier,  frequency-domain equalization,  iterative,  noise prediction,  decision-feedback equalization,  

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Summary: 
In this letter, we propose a novel frequency-domain equalizer (FDE) for single-carrier systems characterized by severe inter-symbol interference (ISI) channels; it consists of a linear FDE and an iterative block noise-predictor (IBNP). Unlike the FDE with time-domain noise predictor (FDE-NP), the proposed scheme allows the feedback equalizer being an uncausal filter, and performs the noise prediction in an iterative manner. For this reason, FDE-IBNP can remove both precursor and postcursor ISI, and alleviate the impact of error-propagation. Besides, our scheme has lower computational complexity than the present iterative block equalizers.