Study on OTFS Channel Estimation Algorithms in High-Speed Mobile Communication Systems

Zhanjun JIANG; Qingda LIU

doi:10.11999/JEIT200683

Volume 43 Issue 10

Oct. 2021

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Zhanjun JIANG, Qingda LIU. Study on OTFS Channel Estimation Algorithms in High-Speed Mobile Communication Systems[J]. Journal of Electronics & Information Technology, 2021, 43(10): 2878-2885. doi: 10.11999/JEIT200683

Citation:

Zhanjun JIANG, Qingda LIU. Study on OTFS Channel Estimation Algorithms in High-Speed Mobile Communication Systems[J]. Journal of Electronics & Information Technology, 2021, 43(10): 2878-2885. doi: 10.11999/JEIT200683

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Study on OTFS Channel Estimation Algorithms in High-Speed Mobile Communication Systems

doi: 10.11999/JEIT200683

Zhanjun JIANG,
Qingda LIU^,

School of Electronics and Information Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China

Funds: Gansu Province Radio Monitoring and Positioning Innovation Team (2017C-09), The Funded by Lanzhou Jiaotong University "Hundred Young Talents Training Program" (150220232)

Received Date: 2020-08-05
Rev Recd Date: 2020-12-09

Available Online: 2021-02-27

Publish Date: 2021-10-18

Abstract

Abstract

In view of the problem that dual-dispersion channels will reduce the reliability of channel estimation in high-speed mobile environments, a channel estimation algorithm based on compressed sensing is proposed in the input-output model of Orthogonal Time-Frequency-Space (OTFS) modulation system. The maximum Doppler shift and the maximum delay in the channel are employed to determine the size of the pilot transmission matrix in the algorithm. Compared with the traditional Orthogonal Matching Pursuit (OMP) channel estimation algorithms, the pilot resources can be saved in the proposed algorithm while the accuracy of similar channel estimation is guaranteed. Furthermore, the phase rotation of the OTFS modulation symbols is used to improve the rank of the differential matrix. Theoretical analysis and simulation results show that the diversity order of the OTFS system is improved and noise interference is reduced.
- Orthogonal Time-Frequency-Space (OTFS) modulation,
- Channel estimation,
- Orthogonal Matching Pursuit (OMP),
- Phase rotation

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References(23)

References

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