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2015 | OriginalPaper | Chapter

5. Semi-Blind Multi-CFO Estimation and Equalization for Multiuser CoMP OFDM Systems

Authors : Yufei Jiang, Xu Zhu, Eng Gee Lim, Yi Huang, Hai Lin

Published in: Semi-Blind Carrier Frequency Offset Estimation and Channel Equalization

Publisher: Springer International Publishing

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Abstract

In the previous chapter, a single-CFO estimation method is presented. In this chapter, we present a low-complexity semi-blind structure with multi-CFO estimation and ICA based equalization structure for multiuser CoMP OFDM systems. A short pilot is carefully designed for each user and has a two-fold advantage. On the one hand, using the pilot structure, a complex multi-dimensional search for multiple CFOs is divided into a number of low-complexity mono-dimensional searches. On the other hand, the cross-correlations between the transmitted and the received pilots are explored to allow simultaneous elimination of permutation ambiguity and quadrant ambiguity in the ICA equalized signals. Simulation results show that, with a low training overhead of 1.6 %, the presented semi-blind system not only outperforms the existing multi-CFO estimation schemes in terms of BER and MSE of multi-CFO estimation, but also achieves a BER performance close to the ideal case with perfect CSI and no CFO at the receiver.

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previous chapter Semi-Blind CFO Estimation and Equalization for Single-User MIMO OFDM Systems
next chapter Semi-Blind Joint ICI Mitigation and Equalization for CA Based CoMP OFDMA Systems
Appendix
Available only for authorised users
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Metadata
Title
Semi-Blind Multi-CFO Estimation and Equalization for Multiuser CoMP OFDM Systems
Authors
Yufei Jiang
Xu Zhu
Eng Gee Lim
Yi Huang
Hai Lin
Copyright Year
2015
Book
Semi-Blind Carrier Frequency Offset Estimation and Channel Equalization

Print ISBN: 978-3-319-24982-7

Electronic ISBN: 978-3-319-24984-1

Copyright Year: 2015

DOI
https://doi.org/10.1007/978-3-319-24984-1_5

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