Symbol-timing estimation in space-time coding systems based on orthogonal training sequences Academic Article

abstract

• Space-time coding has received considerable interest recently as a simple transmit diversity technique for improving the capacity and data rate of a channel without bandwidth expansion. Most research in space-time coding, however, assumes that the symbol timing at the receiver is perfectly known. In practice, this has to be estimated with high accuracy. In this paper, a new symbol-timing estimator for space-time coding systems is proposed. It improves the conventional algorithm of Naguib et al. such that accurate timing estimates can be obtained even if the over-sampling ratio is small. Analytical mean-square error (MSE) expressions are derived for the proposed estimator. Simulation and analytical results show that for a modest oversampling ratio (such as Q equal to four), the MSE of the proposed estimator is significantly smaller than that of the conventional algorithm. The effects of the number of transmit and receive antennas, the oversampling ratio, and the length of training sequence on the MSE are also examined. 2005 IEEE.

authors

• Serpedin, Erchin

published proceedings

• IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS

author list (cited authors)

• Wu, Y. C., Chan, S. C., & Serpedin, E.

citation count

• 21

complete list of authors

• Wu, YC||Chan, SC||Serpedin, E

publication date

• March 2005

publisher

• Institute of Electrical and Electronics Engineers (IEEE)  Publisher

published in

• IEEE Transactions on Wireless Communications  Journal

keywords

• Approximated Log-likelihood Function
• Space-time Coding
• Symbol-timing Recovery
• Training Sequences

Digital Object Identifier (DOI)

• 10.1109/TWC.2004.843063

start page

• 603

end page

• 613

volume

• 4

issue

• 2

URL

• http://dx.doi.org/10.1109/twc.2004.843063