OFDM system channel estimation using time-domain training sequence for mobile reception of digital terrestrial broadcasting

2000 ◽  
Vol 46 (3) ◽  
pp. 215-220 ◽  
Author(s):  
Che-Shen Yeh ◽  
Yinyi Lin ◽  
Yiyan Wu
Keyword(s):  
Channel Estimation ◽  
Time Domain ◽  
Training Sequence ◽  
Ofdm System

scholarly journals Improved Training Sequence Channel Estimation Scheme in 16QAM MB-OFDM UWBoF System

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Changqing Xiang ◽  
Xi Yang ◽  
Xuan Zhou ◽  
Xiaojun Zhu ◽  
Jincan Xu ◽  
...  
Keyword(s):  
Channel Estimation ◽  
Time Domain ◽  
Orthogonal Frequency Division Multiplexing ◽  
Single Mode ◽  
Training Sequence ◽  
Single Mode Fiber ◽  
Frequency Division ◽  
Training Sequences ◽  
Estimation Scheme ◽  
Simulation Results

In this paper, an improved channel estimation scheme based on time-domain orthogonal gray complementary training sequence (Golay TS) is proposed to resist subcarrier mutual beat interference in 16-quadrature amplitude modulation multiband orthogonal-frequency-division-multiplexing ultrawide band over fiber (16QAM MB-OFDM UWBoF) systems. The simulation results showed that the performance of system with the improved Golay TS channel estimation scheme was improved by about 1 dB compared with the traditional Golay TS channel estimation scheme, at a bit error rate (BER) of 3.8 × 10−3 after 70 km standard single mode fiber (SSMF) transmission. At the same time, the synchronization and channel estimation performance of Golay TS and the selected frequency-domain orthogonal training sequences (TSs) were compared. The simulation results showed that the performance of system with the TSs channel estimation was improved by about 2.7 dB compared with the improved Golay TS channel estimation.

scholarly journals Terabit Nyquist PDM-32QAM signal transmission with training sequence based time domain channel estimation

2014 ◽  
Vol 22 (19) ◽  
pp. 23415 ◽  
Author(s):  
Fan Zhang ◽  
Dan Wang ◽  
Rui Ding ◽  
Zhangyuan Chen
Keyword(s):  
Channel Estimation ◽  
Time Domain ◽  
Signal Transmission ◽  
Training Sequence

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.

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