Multiple-Input Multiple-Output Overlap-Save Frequency-Domain Decision-Feedback Equalization for Single-Carrier Systems in Time-Varying Environments

Ang FENG  Qinye YIN  Xue FENG  

IEICE TRANSACTIONS on Communications   Vol.E93-B    No.11    pp.3203-3206
Publication Date: 2010/11/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E93.B.3203
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
multiple-input multiple-output,  single-carrier,  overlap-save,  decision-feedback equalization,  

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In this letter, we propose a novel frequency-domain equalization (FDE) scheme for single-carrier multiple-input multiple-output (MIMO) systems over time-varying channels. Based on frequency-domain decision-feedback equalization (FD-DFE), we design a feedforward filter with constraint such that the equalization can be easily realized segment-by-segment with the help of the overlap-save (OLS) method. Since the segment length and block length can be designed independently, our proposal sets relatively short segment length to obtain good performance in time-varying environments, and very long block length to achieve high spectral efficiency. Furthermore, we present two scenarios in the design of filters for MIMO systems.