An Improved Training Sequence Based Timing Synchronization Algorithm for MIMO-OFDM System

2014 ◽  
Author(s):  
Chen Jieping
Keyword(s):  
Training Sequence ◽  
Timing Synchronization ◽  
Ofdm System ◽  
Synchronization Algorithm ◽  
Mimo Ofdm

Golay pair aided timing synchronization algorithm for distributed MIMO-OFDM system

2018 ◽  
Vol 15 (9) ◽  
pp. 178-188 ◽  
Author(s):  
Weizhi Zhong ◽  
Xiaoyi Lu ◽  
Lei Xu ◽  
Xin Liu
Keyword(s):  
Timing Synchronization ◽  
Ofdm System ◽  
Synchronization Algorithm ◽  
Mimo Ofdm

Synchronization Algorithm for STBC MIMO-OFDM System at Low SNR

2016 ◽  
Vol 91 (1) ◽  
pp. 237-253
Author(s):  
Renze Luo ◽  
Jiao Yang ◽  
Guolin He ◽  
Wenchang Cao
Keyword(s):  
Ofdm System ◽  
Low Snr ◽  
Synchronization Algorithm ◽  
Mimo Ofdm

scholarly journals A Novel Timing and Frequency Offset Estimation Algorithm for Filtered OFDM System

2020 ◽  
Author(s):  
Xingle Feng ◽  
Mengjie Wang ◽  
Li Chen ◽  
Wenxia Zhu ◽  
Kun Hua
Keyword(s):  
Frequency Domain ◽  
Time Domain ◽  
Frequency Offset ◽  
Training Sequence ◽  
Spectrum Efficiency ◽  
Estimation Accuracy ◽  
Timing Synchronization ◽  
Ofdm System ◽  
Pn Sequence ◽  
Training Symbol

Abstract As a critical technology of 5G air interface waveform, F-OFDM not only inherits the technical advantages of OFDM, but also has outstanding advantages in system flexibility and spectrum efficiency. However, as a multi-carrier technology, it is still extremely sensitive to sample timing offset (STO) and carrier frequency offset (CFO). In this letter, an improved Park frequency domain training sequence (FS-Park) is proposed to complete STO and CFO estimation of F-OFDM system. Firstly, a real-value pseudorandom number (PN) sequence is sent to each subcarrier as training sequence in frequency domain, the corresponding time domain training symbol has a conjugate symmetry structure. Secondly, the training symbol is utilized for timing synchronization, then the fractional frequency offset is estimated based on the cyclic prefix in time domain. Finally, the integer frequency offset is estimated in frequency domain based on the auto-correlation of PN sequence. The simulation results illustrate that the FS-Park algorithm not only has a single pulse timing metric curve and great STO estimation accuracy, but also has better performance of CFO estimation than classical Park algorithm and Liang Xiao's method.

scholarly journals A Novel Timing and Frequency Offset Estimation Algorithm for Filtered OFDM System

2020 ◽  
Author(s):  
Xingle Feng ◽  
Mengjie Wang ◽  
Li Chen ◽  
Wenxia Zhu ◽  
Kun Hua
Keyword(s):  
Frequency Domain ◽  
Time Domain ◽  
Frequency Offset ◽  
Training Sequence ◽  
Spectrum Efficiency ◽  
Estimation Accuracy ◽  
Timing Synchronization ◽  
Ofdm System ◽  
Pn Sequence ◽  
Training Symbol

Abstract As a critical technology of 5G air interface waveform, F-OFDM not only inherits the technical advantages of OFDM, but also has outstanding advantages in system flexibility and spectrum efficiency. However, as a multi-carrier technology, it is still extremely sensitive to sample timing offset (STO) and carrier frequency offset (CFO). In this letter, an improved Park frequency domain training sequence (FS-Park) is proposed to complete STO and CFO estimation of F-OFDM system. Firstly, a real-value pseudorandom number (PN) sequence is sent to each subcarrier as training sequence in frequency domain, the corresponding time domain training symbol has a conjugate symmetry structure. Secondly, the training symbol is utilized for timing synchronization, then the fractional frequency offset is estimated based on the cyclic prefix in time domain. Finally, the integer frequency offset is estimated in frequency domain based on the auto-correlation of PN sequence. The simulation results illustrate that the FS-Park algorithm not only has a single pulse timing metric curve and great STO estimation accuracy, but also has better performance of CFO estimation than classical Park algorithm and Liang Xiao's method.

An Improved OFDM Timing Synchronization Algorithm

2012 ◽  
Vol 220-223 ◽  
pp. 2419-2422
Author(s):  
Jing Dai ◽  
Fei Fei Guo ◽  
Guo Lin Zhang
Keyword(s):  
Orthogonal Frequency Division Multiplexing ◽  
Side Lobe ◽  
Training Sequence ◽  
Timing Synchronization ◽  
Synchronization Errors ◽  
Synchronization Algorithm ◽  
Carrier Communication ◽  
Conventional Algorithm ◽  
Synchronization Performance ◽  
Improved Algorithm

Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier communication system and the system is very sensitive to synchronization errors. The problem that synchronization is not accurate can reduce the system performance largely. Based on the research of Schmidl & Cox and Minn algorithms, the paper proposed an improved timing synchronization algorithm by using the new training sequence in the frequency domain. The improved algorithm eliminates the peak platform problem and side lobe peak problem of the conventional synchronization algorithms in this article. The simulation at MATLAB shows that the improved algorithm overcomes the problems of the conventional algorithms and the timing judgment curve of the improved algorithm also has a very sharp peak at the timing synchronization position, compared with the conventional algorithm. So, the timing synchronization performance of the algorithm is better.

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