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Title: A recursive QR approach to semi-blind equalization of time-varying MIMO channels
Authors: Kung, SY
Myers, CL
Zhang, X
Keywords: MIMO systems
Adaptive equalisers
Bandwidth allocation
Blind equalisers
Digital radio
Interference suppression
Intersymbol interference
Matrix decomposition
Mobile radio
Recursive estimation
Time-varying channels
Issue Date: 2004
Source: 2004 IEEE International Conference on Acoustics, Speech, and Signal Processing : proceedings : May 17-21, 2004, Fairmont Queen Elizabeth Hotel, Montreal, Quebec, Canada, p. iv-437-iv-440 How to cite?
Abstract: This paper presents a novel adaptive equalization algorithm for time-varying, frequency-selective MIMO systems that harnesses the finite alphabet property inherent in digital communication. The algorithm leads to a direct, cost-efficient QR-based recursive updating procedure for the equalizer coefficients that forces adaptation to changing channel characteristics. The proposed method does not require precise channel estimation and uses significantly less pilot symbols than other traditional equalizers, implying a drastic reduction in bandwidth overhead. Simulation results confirm that this approach outperforms the traditional recursive least squares (RLS) adaptive equalizer for this application and rivals the MMSE equalizers with perfect channel knowledge.
ISBN: 0-7803-8484-9
ISSN: 1520-6149
DOI: 10.1109/ICASSP.2004.1326857
Appears in Collections:Conference Paper

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