Joint Weighted Least Squares Estimation of Carrier Frequency and Timing Frequency Offset for OFDM Systems over Multipath Fading Channel
Journal
IEEE Transactions on Vehicular Technology
Journal Volume
54
Journal Issue
1
Pages
211-223
Date Issued
2005-01
Author(s)
Abstract
This paper presents an algorithm for joint estimation of carrier-frequency offset and timing offset for orthogonal frequency-division multiplexing (OFDM) systems in the tracking mode. The proposed weighted least-squares algorithm derives its estimates based on phase differences in the received pilot subcarrier signals between two symbols. Moreover, the optimal weights in two different channel conditions are derived. Both analysis and simulation show that the weighted least-squares algorithm can effectively and accurately estimate the carrier-frequency offset as well as the timing offset of OFDM signals in multipath fading channels. © 2005 IEEE.
Subjects
Carrier-frequency offset; Estimation; Synchronization; Timing offset; Weighted least squares
Other Subjects
Algorithms; Communication channels (information theory); Computer simulation; Estimation; Fading (radio); Interference suppression; Least squares approximations; Multipath propagation; Orthogonal frequency division multiplexing; Carrier frequency offset; Timing offset; Weighted least squares; Wireless telecommunication systems
Type
journal article