Super-Resolution Sparse MIMO-OFDM Channel Estimation Based on Spatial and Temporal Correlations

This letter proposes a parametric sparse multiple input multiple output (MIMO)-OFDM channel estimation scheme based on the finite rate of innovation (FRI) theory, whereby super-resolution estimates of path delays with arbitrary values can be achieved. Meanwhile, both the spatial and temporal correla...

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Bibliographic Details
Published in:IEEE communications letters 2014-07, Vol.18 (7), p.1266-1269
Main Authors: Gao, Zhen, Dai, Linglong, Lu, Zhaohua, Yuen, Chau, Wang, Zhaocheng
Format: Article
Language:English
Subjects:
Antennas
Applied sciences
Channel estimation
Correlation
Delays
Detection, estimation, filtering, equalization, prediction
Exact sciences and technology
Information, signal and communications theory
MIMO
Multiplexing
OFDM
Radiocommunications
Signal and communications theory
Signal, noise
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
Transmitting antennas
Wireless communication
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Summary:This letter proposes a parametric sparse multiple input multiple output (MIMO)-OFDM channel estimation scheme based on the finite rate of innovation (FRI) theory, whereby super-resolution estimates of path delays with arbitrary values can be achieved. Meanwhile, both the spatial and temporal correlations of wireless MIMO channels are exploited to improve the accuracy of the channel estimation. For outdoor communication scenarios, where wireless channels are sparse in nature, path delays of different transmit-receive antenna pairs share a common sparse pattern due to the spatial correlation of MIMO channels. Meanwhile, the channel sparse pattern is nearly unchanged during several adjacent OFDM symbols due to the temporal correlation of MIMO channels. By simultaneously exploiting those MIMO channel characteristics, the proposed scheme performs better than existing state-of-the-art schemes. Furthermore, by joint processing of signals associated with different antennas, the pilot overhead can be reduced under the framework of the FRI theory.
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2014.2325027