Low-Complexity Frequency Synchronization for ICA Based Semi-Blind CoMP Systems with ICI and Phase Rotation Caused by Multiple CFOs



Jiang, Yufei, Zhu, Xu ORCID: 0000-0002-7371-4595, Lim, Eng Gee ORCID: 0000-0003-0199-7386, Huang, Yi ORCID: 0000-0001-7774-1024 and Lin, Hai
(2014) Low-Complexity Frequency Synchronization for ICA Based Semi-Blind CoMP Systems with ICI and Phase Rotation Caused by Multiple CFOs. In: ICC 2014 - 2014 IEEE International Conference on Communications, 2014-6-10 - 2014-6-14, Sydney, Australia.

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Abstract

We propose a low-complexity frequency synchronization approach for semi-blind independent component analysis (ICA) based coordinated multi-point (CoMP) orthogonal frequency division multiplexing (OFDM) systems, with multiple carrier frequency offsets (CFOs). The key idea is to introduce a short pilot for both multi-CFO estimation and ambiguity elimination in the ICA equalized signals. First, by minimizing the cross-correlation between original pilots and received pilots with implicit phase rotation correction, the one-dimensional search based CFO estimation can be performed without trial ICI compensation and channel state information (CSI). Second, by maximizing the real part of the cross-correlation between ICA equalized pilots and original pilots, the same pilots can be used again to eliminate the permutation and quadrant ambiguity in the ICA equalized signals. Simulation results show that, with a very low training overhead of 2%, the proposed multi-CFO estimation approach outperforms existing methods. Also, the proposed semi-blind CoMP system can achieve a bit error rate (BER) performance close to the ideal case with perfect CSI and no CFO. © 2014 IEEE.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: carrier frequency offset (CFO), independent component analysis (ICA), CoMP, OFDM
Subjects: ?? TK ??
Depositing User: Symplectic Admin
Date Deposited: 12 May 2015 14:57
Last Modified: 16 Mar 2024 06:02
DOI: 10.1109/icc.2014.6884042
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/2011206