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Data Detection in Cooperative STBC-OFDM Systems With Multiple Frequency Offsets

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3 Author(s)
Qinfei Huang ; Sch. of Electron. & Electr. Eng., Univ. of Leeds, Leeds ; Ghogho, M. ; Jibo Wei

This paper addresses the problem of data detection in cooperative space-time block coded (STBC) orthogonal frequency division multiplexing (OFDM) systems in the presence of multiple carrier frequency offsets (CFO). An enhanced iterative maximum-likelihood detector (EIMLD) is proposed. This method consists of first removing inter-carrier interference (ICI), and then performing iterative symbol detection and inter-symbol interference reduction. Simulation results show that EIMLD significantly outperforms existing iterative methods. Comparisons with the zero-forcing and minimum-mean square error detectors, which require complex matrix inversion, are also carried out.

Published in:

Signal Processing Letters, IEEE  (Volume:16 ,  Issue: 7 )

Date of Publication:

July 2009

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