Research Article
Joint Time and Frequency Offset Estimation in LTE Downlink
@INPROCEEDINGS{10.1109/ChinaCom.2012.6417514, author={Shoujun Huang and Yongtao Su and Ying He and Shan Tang}, title={Joint Time and Frequency Offset Estimation in LTE Downlink}, proceedings={7th International Conference on Communications and Networking in China}, publisher={IEEE}, proceedings_a={CHINACOM}, year={2012}, month={10}, keywords={lte frequency offset synchronization pss}, doi={10.1109/ChinaCom.2012.6417514} }- Shoujun Huang
Yongtao Su
Ying He
Shan Tang
Year: 2012
Joint Time and Frequency Offset Estimation in LTE Downlink
CHINACOM
IEEE
DOI: 10.1109/ChinaCom.2012.6417514
Abstract
Time and frequency synchronization is very critical in LTE downlink. This paper proposed a joint time and frequency synchronization algorithm to estimate the carrier frequency offset(CFO), including the integer frequency offset (IFO) and the fractional frequency offset (FFO), and the start position of a radio frame. The FFO is first estimated by
maximum likelihood auto-correlation algorithm. After the FFO compensation, the received signal is cross-correlated with the nine possible primary synchronization signals (PSS)
in time domain to obtain the start position and the IFO. Simulation results show that the performance of the proposed synchronization algorithm is more robust than the traditional algorithms especially in large CFO.
