Fundamentals of statistical signal processing: estimation theory
Fundamentals of statistical signal processing: estimation theory
A Residual and Sampling Frequency Offset Estimation Scheme for Multiband OFDM
AUSWIRELESS '07 Proceedings of the The 2nd International Conference on Wireless Broadband and Ultra Wideband Communications
A robust timing and frequency synchronization for OFDM systems
IEEE Transactions on Wireless Communications
Coarse frame and carrier synchronization of OFDM systems: a new metric and comparison
IEEE Transactions on Wireless Communications
ML-based Tracking Algorithms for MIMO-OFDM
IEEE Transactions on Wireless Communications
A Fine Frequency Synchronization and Tracking for Mobile WiMAX Broadcasting Systems
IEEE Transactions on Consumer Electronics
Hi-index | 0.01 |
This paper investigates the joint pilot-assisted estimation of the residual carrier frequency offset (RCFO) and sampling frequency offset (SFO) in an orthogonal frequency-division multiplexing (OFDM) system. As it is known, the exact maximum-likelihood (ML) solution to this problem involves a bidimensional grid-search that cannot be pursued in practice. After introducing an enlarged set of auxiliary unknown parameters, however, the RCFO and SFO recovery tasks can be decoupled and the bidimensional search is thus replaced with a simpler mono-dimensional search. This results into an estimation algorithm of reasonable complexity which is suitable for practical implementation. To further reduce the processing load, we also present an alternative scheme yielding frequency estimates in closed-form. Numerical simulations indicate that the proposed methods outperform existing estimators available in the literature in terms of both estimation accuracy and error-rate performance.