Semiblind channel estimation and equalization for MIMO space-time coded OFDM

Based on the special features of space-time coding (STC) and orthogonal frequency-division multiplexing (OFDM), it is mathematically proved that all channel responses of a multiple-input-multiple-output STC-OFDM system can be identified blindly subject to two ambiguity matrices with a subspace-based...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on circuits and systems. 1, Fundamental theory and applications Fundamental theory and applications, 2006-02, Vol.53 (2), p.463-474
Main Authors: Yonghong Zeng, Lam, W.H., Tung Sang Ng
Format: Article
Language:English
Subjects:
Ambiguity
Bandwidth
Blind
Channel estimation
Channels
Equalization
Frequency division multiplexing
Frequency domain analysis
Frequency estimation
Mathematical analysis
Matrices
Matrix methods
MIMO
multiple-input-multiple-output (MIMO)
multiuser
OFDM
Orthogonal Frequency Division Multiplexing
orthogonal frequency-division multiplexing (OFDM)
Pilots
Receiving antennas
semiblind
space-time coding (STC)
subspace
Symbols
Transfer functions
Transmitting antennas
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Based on the special features of space-time coding (STC) and orthogonal frequency-division multiplexing (OFDM), it is mathematically proved that all channel responses of a multiple-input-multiple-output STC-OFDM system can be identified blindly subject to two ambiguity matrices with a subspace-based method. A method is then presented to resolve the two ambiguity matrices by using few pilot symbols. With the estimated channels, a frequency domain approach is presented to recover the transmitted symbols. The presented semiblind algorithms are valid even if the channel transfer functions are not coprime and do not require precise channel order information (only an upper bound for the orders is required).
ISSN:1549-8328
1057-7122
1558-0806
DOI:10.1109/TCSI.2005.856671