An improved frequency offset estimation algorithm for OFDM system in inter-symbol interference environment

2014 ◽  
Author(s):  
Hang Liu ◽  
Feng Zheng ◽  
Yun Tang
Keyword(s):  
Estimation Algorithm ◽  
Frequency Offset ◽  
Frequency Offset Estimation ◽  
Ofdm System ◽  
Inter Symbol Interference

scholarly journals A novel timing and frequency offset estimation algorithm for filtered OFDM system

2020 ◽  
Vol 2020 (1) ◽  
Author(s):  
Xing-le Feng ◽  
Meng-jie Wang ◽  
Li Chen ◽  
Wen-xia Zhu ◽  
Kun Hua
Keyword(s):  
Estimation Algorithm ◽  
Frequency Offset ◽  
Frequency Offset Estimation ◽  
Ofdm System

An Iterative Frequency Offset Estimation Algorithm for OFDM System

2013 ◽  
Vol 765-767 ◽  
pp. 2858-2861
Author(s):  
Feng Zheng ◽  
Yun Tang ◽  
Hang Liu
Keyword(s):  
Data Structure ◽  
Wireless Communications ◽  
Iterative Algorithm ◽  
Orthogonal Frequency Division Multiplexing ◽  
Estimation Algorithm ◽  
Frequency Offset ◽  
Frequency Division Multiplexing ◽  
Frequency Division ◽  
Frequency Offset Estimation ◽  
Ofdm System

Orthogonal Frequency Division Multiplexing (OFDM) is considered as an important technique for future wireless communications. In addition, OFDM has a better performance at inter symbol interference (ISI). One of the major disadvantages of the multi-carrier modulation is about the sensitivity of the performance to a frequency offset. In this paper, we propose an iterative algorithm of frequency offset estimation for the OFDM system. The fundamental algorithm of our iterative algorithm is the frequency pilot aided algorithm. When we get a result with the fundamental algorithm every time, we use the result to estimate for a second time. The algorithm we proposed does not require some additional pilots or changing the data structure of the fundamental algorithm.

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.

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