An Iterative Channel Parameters Estimation Algorithm in OTFS Systems

被引：0
作者：
Chang Q. [1 ]
Wang S. [2 ]
Jin J. [2 ]
Li Y. [3 ]
Long H. [1 ]
机构：
[1] School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing
[2] Future Mobile Technology Laboratory, China Mobile Research Institute, Beijing
[3] Beijing Municipal Bureau of Economy and Information Technology, Beijing
来源：
Beijing Youdian Daxue Xuebao/Journal of Beijing University of Posts and Telecommunications | 2023年 / 46卷 / 04期
关键词：
channel estimation; orthogonal time frequency space; reference signal;
D O I：
10.13190/j.jbupt.2022-126
中图分类号：
学科分类号：
摘要：
An iterative channel estimation algorithm in time-frequency domain based on orthogonal time and frequency space (OTFS) system is proposed for time-frequency dual selection channel environment with high delay and high Doppler offset. Using the property that channel matrix in time-frequency domain can be expressed as the product of Doppler offset matrix, channel complex gain matrix and delay matrix, the estimation results of Doppler offset and delay parameters of each path are updated iteratively to improve the accuracy of each parameter estimation. The channel matrix in the time-frequency domain is calculated according to the parameter estimation results, which is directly used in the time-frequency domain equalizer to reduce the complexity of the receiver. Simulation results show that the proposed algorithm can significantly improve the performance of channel estimation, support more flexible reference signal configuration, and reduce transmission overhead. © 2023 Beijing University of Posts and Telecommunications. All rights reserved.
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收藏
页码：52 / 57
页数：5
相关论文
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