TY - JOUR
T1 - Linear precoding assisted blind channel estimation for OFDM systems
AU - Lin, Rui
AU - Petropulu, Athina P.
N1 - Funding Information: Manuscript received February 2, 2004; revised August 28, 2004. This work was supported by the Office of Naval Research under Grant ONR-N00014-03-1-0123. The review of this paper was coordinated by Dr. Z. Xu. The authors are with the Department of Electrical and Computer Engineering, Drexel University, Philadelphia, PA 19104 USA (e-mail: rlin@ece.drexel.edu; athina@ece.drexel.edu; athina@cbis.ece.drexel.edu). Digital Object Identifier 10.1109/TVT.2005.844681
PY - 2005/5
Y1 - 2005/5
N2 - We propose a novel precoding approach for single transmit/receiver antenna orthogonal frequency-division muitiplexing (OFDM) systems that enables blind channel estimation. A nonredundant nonunitary linear precoder is applied on each pair of blocks before they enter the OFDM system. The structure induced to the transmitted blocks allows for blind channel estimation at the receiver based on simple cross-correlation operations. At the same time, the multipath diversity of the system is increased. An optimal precoding scheme is pursued that, for quadrature phase-shift keying signals results in minimum channel error and asymptotically minimum bit error rate. Analytic performance evaluation of the proposed approach, and Cramer-Rao bound for the proposed channel estimate, are presented.
AB - We propose a novel precoding approach for single transmit/receiver antenna orthogonal frequency-division muitiplexing (OFDM) systems that enables blind channel estimation. A nonredundant nonunitary linear precoder is applied on each pair of blocks before they enter the OFDM system. The structure induced to the transmitted blocks allows for blind channel estimation at the receiver based on simple cross-correlation operations. At the same time, the multipath diversity of the system is increased. An optimal precoding scheme is pursued that, for quadrature phase-shift keying signals results in minimum channel error and asymptotically minimum bit error rate. Analytic performance evaluation of the proposed approach, and Cramer-Rao bound for the proposed channel estimate, are presented.
KW - Blind channel estimation
KW - Orthogonal frequency-division multiplexing (OFDM)
KW - Precoding
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U2 - https://doi.org/10.1109/TVT.2005.844681
DO - https://doi.org/10.1109/TVT.2005.844681
M3 - Article
VL - 54
SP - 983
EP - 995
JO - IEEE Transactions on Vehicular Technology
JF - IEEE Transactions on Vehicular Technology
SN - 0018-9545
IS - 3
ER -