A new synchronization algorithm for OFDM systems in multipath environment

2003 ◽  
Author(s):  
Liang Wang ◽  
Xiuming Shan ◽  
Yong Ren
Keyword(s):  
Ofdm Systems ◽  
Synchronization Algorithm ◽  
Multipath Environment

LS Codes Aided Channel Estimation for MIMO-OFDM Systems in Multipath Environment

2006 ◽  
Author(s):  
Wonsop Kim ◽  
Hyun Chung ◽  
Kwang Lee ◽  
Hyoungsuk Jeon ◽  
Jongsub Cha ◽  
...  
Keyword(s):  
Channel Estimation ◽  
Ofdm Systems ◽  
Mimo Ofdm ◽  
Multipath Environment

A Novel Frequency Synchronization Algorithm Based on PN Sequences and Pilots for TFU-OFDM Systems

2011 ◽  
Vol 58-60 ◽  
pp. 1541-1547
Author(s):  
Guang Da Xue ◽  
Li Li Hu ◽  
Da Jin Wang
Keyword(s):  
Frequency Domain ◽  
Time Domain ◽  
Orthogonal Frequency Division Multiplexing ◽  
Modulation Scheme ◽  
Frequency Synchronization ◽  
Ofdm Systems ◽  
Synchronization Method ◽  
Synchronization Algorithm ◽  
Pn Sequences ◽  
Sufficient Precision

In this paper, a novel frequency synchronization algorithm for a new modulation scheme named time domain and frequency domain united orthogonal frequency division multiplexing (TFU-OFDM) is introduced. The frequency synchronization method has two-steps, which joints time and frequency domain estimation based on PN sequences and pilots. We utilize the PN sequences as guard intervals in time domain to achieve the first-step estimation and the second-step is realized by the pilots in data blocks in frequency domain. The simulation results and analysis show that the proposed frequency synchronization method could achieve fast and reliable synchronization and sufficient precision, and provides excellent performance for TFU-OFDM systems.

scholarly journals Improved Timing Estimation Using Iterative Normalization Technique for OFDM Systems

2017 ◽  
Vol 7 (2) ◽  
pp. 905
Author(s):  
Suyoto Suyoto ◽  
Iskandar Iskandar ◽  
Sugihartono Sugihartono ◽  
Adit Kurniawan
Keyword(s):  
Computer Simulation ◽  
Detection Probability ◽  
Multipath Channel ◽  
Delay Spread ◽  
Ofdm Systems ◽  
Ofdm System ◽  
Timing Estimation ◽  
Multipath Environment ◽  
Channel Environment ◽  
Statistical Change

<p>Conventional timing estimation schemes based on autocorrelation experience performance degradation in the multipath channel environment with high delay spread. To overcome this problem, we proposed an improvement of the timing estimation for the OFDM system based on statistical change of symmetrical correlator. The new method uses iterative normalization technique to the correlator output before the detection based on statistical change of symmetric correlator is applied. Thus, it increases the detection probability and achieves better performance than previously published methods in the multipath environment. Computer simulation shows that our method is very robust in the fading multipath channel</p>

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