Time and frequency offset estimation in OFDM systems employing pulse shaping

Abstract

Time and frequency offset estimation is addressed in an OFDM system that uses a cyclic prefix and pulse shaping. Earlier work has presented a method that avoids the use of pilots by exploiting the inherent correlation in the cyclically extended OFDM symbol. In this paper this technique is extended to include systems with pulse shaping. The joint Maximum Likelihood estimator of time and frequency offsets for such systems is presented and evaluated. An implementable structure of the extended estimator is given. Simulations show that it is possible to maintain the performance when introducing pulse shaping into an OFDM system.Godkänd; 1997; 20080220 (ysko

Keywords

This publication has 11 references indexed in Scilit:

Synchronizability of OFDM signals
Published by Institute of Electrical and Electronics Engineers (IEEE) ,2002
A new frequency detector for orthogonal multicarrier transmission techniques
Published by Institute of Electrical and Electronics Engineers (IEEE) ,2002
Optimal finite duration pulses for OFDM
IEEE Transactions on Communications, 1996
Synchronization requirements for multi-user OFDM on satellite mobile and two-path Rayleigh fading channels
IEEE Transactions on Communications, 1995
Low-complex frame synchronization in OFDM systems
Published by Institute of Electrical and Electronics Engineers (IEEE) ,1995
A technique for orthogonal frequency division multiplexing frequency offset correction
IEEE Transactions on Communications, 1994
Multicarrier modem for digital HDTV terrestrial broadcasting
Signal Processing: Image Communication, 1993
Clipping distortion in DMT ADSL systems
Electronics Letters, 1993
OFDM/FM frame synchronization for mobile radio data communication
IEEE Transactions on Vehicular Technology, 1993
Multicarrier modulation for data transmission: an idea whose time has come
IEEE Communications Magazine, 1990