An Improvement Method of Frequency Offset Estimation Performance in Communication System Carrier Synchronization

2016 ◽  
Author(s):  
Yongbin Wang ◽  
Lihua Li ◽  
Renshen Li ◽  
Tianhui Fu ◽  
x Fu ◽  
...  
Keyword(s):  
Communication System ◽  
Frequency Offset ◽  
Frequency Offset Estimation ◽  
Carrier Synchronization ◽  
Estimation Performance ◽  
Improvement Method

Frequency Offset Estimation Algorithm of OFDMA Wireless Communication System Based on Compressed Sensing

2015 ◽  
Vol 7 (3) ◽  
pp. 55-62
Author(s):  
Ma Qinggong ◽  
Yang Bo
Keyword(s):  
Wireless Communication ◽  
Compressed Sensing ◽  
Communication System ◽  
Estimation Algorithm ◽  
Frequency Offset ◽  
Frequency Offset Estimation ◽  
Computation Complexity ◽  
Algorithmic Approach ◽  
Wireless Communication System ◽  
Overall Performance

The frequency offset problem of OFDMA wireless communication system has been an important obstructive factor for the rapid promotion of this technology. The frequency offset estimation algorithm of OFDMA wireless communication system based on compressed sensing reconstructs the optimized mathematical model of frequency offset. Under the premise of keeping its estimated performance, from the reduction of its computation complexity and the enhancement of real-time performance of the system, it provides an optimized algorithmic approach and thus improves the practicability of algorithm. The compressed sensing algorithm has realized the fast and accurate extraction of the frequency offset parameters, so the overall performance of the system can reach the optimal state.

scholarly journals Analysis of communications and implementation performance of FFT based carrier synchronization of BPSK/QPSK bursts

2008 ◽  
Vol 6 ◽  
pp. 95-100 ◽  
Author(s):  
U. Wasenmüller ◽  
T. Brack ◽  
N. Wehn
Keyword(s):  
Fourier Transform ◽  
Maximum Likelihood ◽  
Maximum Likelihood Estimation ◽  
Likelihood Estimation ◽  
Frequency Offset ◽  
Frequency Offset Estimation ◽  
Hardware Complexity ◽  
Carrier Synchronization ◽  
Phase Offset ◽  
Combine Phase

Abstract. Carrier synchronization is a vital part of every inner receiver in wireless communications. Frequency offset and phase offset of the received burst must be estimated and the received samples must be corrected according to the estimation. An approximation of the maximum likelihood estimation of frequency offset is given by the Fast Fourier Transform (FFT). The accuracy of the estimation as well as the hardware complexity and throughput depend on the number of FFT points. We demonstrate three techniques to improve the accuracy of the FFT based frequency offset estimation respectively to reduce the number of needed FFT points. These three techniques as well as the reference algorithm without improvements combine phase offset estimation with frequency offset estimation. We present the communications and FPGA implementation performance of these techniques.

Study of the OFDM System Carrier Synchronization Technology

2014 ◽  
Vol 513-517 ◽  
pp. 2772-2774
Author(s):  
Wen Bin Wang ◽  
Dao Yuan Liu ◽  
Yu Qin Yao
Keyword(s):  
Carrier Frequency ◽  
Carrier Frequency Offset ◽  
Estimation Algorithm ◽  
Frequency Offset ◽  
Frequency Synchronization ◽  
Frequency Offset Estimation ◽  
Ofdm System ◽  
Carrier Synchronization ◽  
Carrier Frequency Offset Estimation ◽  
Primary Problem

The OFDM system modulates signal by using a plurality of spectrum aliasing orthogonal sub-carriers, so it is extremely sensitive to carrier frequency offset, and any tiny frequency offset may destroy the orthogonality of the sub-carriers, thereby seriously affecting the performance of the system. So carrier frequency offset is the primary problem for the OFDM technology, and in recent years it has also become a focus for researchers. Accurate frequency synchronization is the precondition for the OFDM system to work properly. The main purpose of this paper is to seek a more reliable and viable carrier frequency offset estimation algorithm on the results of previous studies.

Coarse Frequency Offset Estimation of TD-LTE Based on Spectrum Centroid

2013 ◽  
Vol 756-759 ◽  
pp. 3602-3606
Author(s):  
Yan Chao Fu ◽  
Chun Hui Zhou ◽  
Yuan Liang Dong ◽  
Zhi Yuan Shi
Keyword(s):  
Communication System ◽  
Frequency Offset ◽  
Frequency Offset Estimation ◽  
Estimation Algorithms ◽  
Lower Complexity ◽  
Simulation Results ◽  
Integer Frequency Offset

Frequency offset brings a great impact on communication, a small amount of which may cause a serious decline in the performance of communication system. So frequency offset estimation has great significance. TD-LTE system is very sensitive to the frequency offset, we propose a method to estimate the integer frequency offset through calculating spectrum centroid. Simulation results show that the algorithm has a good performance and lower complexity compared with some integer frequency offset estimation algorithms based on data-aided.

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