NDLI: Blind and Semiblind Channel and Carrier Frequency-Offset Estimation in Orthogonally Space-Time Block Coded MIMO Systems

Content Provider	IEEE Xplore Digital Library
Author	Shahbazpanahi, S. Gershman, A.B. Giannakis, G.B.
Copyright Year	1991
Abstract	In this paper, the problem of joint channel and carrier frequency offset (CFO) estimation is studied in the context of multiple-input multiple-output (MIMO) communications based on orthogonal space-time-block codes (OSTBCs). A new blind approach is proposed to jointly estimate the channel matrix and the CFO parameters using a relaxed maximum likelihood (ML) estimator that, for the sake of simplicity, ignores the finite alphabet constraint. Although the proposed technique can be applied to the majority of OSTBCs, there are, however, a few codes that suffer from an intrinsic ambiguity in the joint channel, CFO, and symbol estimates. For such specific OSTBCs, a semiblind modification of the proposed approach is developed that resolves the aforementioned estimation ambiguity. Our simulation results demonstrate that although the finite alphabet constraint is relaxed, the performance of the proposed techniques approaches that of the informed (fully frequency-synchronized and coherent) receiver, provided that a sufficient number of data blocks is available for each channel realization.
Sponsorship	IEEE Signal Processing Society
Starting Page	702
Ending Page	711
Page Count	10
File Size	806517
File Format	PDF
ISSN	1053587X
Volume Number	56
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-02-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency estimation MIMO Maximum likelihood estimation Maximum likelihood decoding Fading Transmitters Context Block codes Communication channels Space time codes orthogonal space-time block codes Blind channel and carrier frequency offset estimation multiple-input multiple-output (MIMO) communications
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

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