Title :
An iterative frequency estimator for feedforward frequency synchronization
Author :
Brown, Tyler ; Wang, Michael
Author_Institution :
Motorola Inc, Arlington Heights, IL, USA
Abstract :
A simple and accurate frequency estimator is proposed. It is applicable to receivers where feedforward frequency synchronization is used such as burst modems. The estimator has a significantly reduced threshold relative to existing phase-based algorithms and its performance is close to that of maximum likelihood estimation. In addition, the mean-squared error performance is within 0.7 dB of the Cramer-Rao bound at SNRs above threshold. Unlike other phase-based methods, the proposed algorithm´s performance is uniform across the frequency range (-π,π)
Keywords :
digital radio; feedforward; frequency estimation; iterative methods; mean square error methods; modems; noise; radio receivers; synchronisation; Cramer-Rao bound; SNR; burst modems; digital communication receivers; feedforward frequency synchronization; iterative frequency estimator; maximum likelihood estimation; mean-squared error performance; phase-based algorithms; phase-based methods; Communication systems; Digital communication; Frequency estimation; Frequency synchronization; Gaussian noise; Low pass filters; Maximum likelihood estimation; Modems; Phase estimation; Signal sampling;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd
Conference_Location :
Rhodes
Print_ISBN :
0-7803-6728-6
DOI :
10.1109/VETECS.2001.944987
