Title :
Research and improvement of LTE uplink frequency offset estimation and compensation
Author :
Zeng Zhaohua;Chang Jingyi
Author_Institution :
Dept. of Communication Engineering, Xi´an University of Science and Technology, Xi´an, China
Abstract :
In LTE system, there are generally two types of frequency offset: fixed frequency offset and Doppler frequency offset. In the paper, firstly, two improved methods of fixed frequency offset estimation are proposed, and then according to the frequency offset estimation, data can be compensated in inter-symbols and intra-symbols. Secondly, with the presence of two types of frequency offset in the system, a joint estimation and compensation algorithm of fixed frequency offset and Doppler frequency offset is proposed. Simulation results show that the proposed algorithms can meet the performance requirements for frequency synchronization of LTE system and reduce system block error ratio(BLER) effectively.
Keywords :
"OFDM","Frequency estimation","Estimation","Frequency-domain analysis","Doppler effect","Demodulation","Smoothing methods"
Conference_Titel :
Signal Processing, Communications and Computing (ICSPCC), 2015 IEEE International Conference on
Print_ISBN :
978-1-4799-8918-8
DOI :
10.1109/ICSPCC.2015.7338830
