Doppler Rate Estimation for OTFS via Large-Scale Antenna Array  

作　　者：SHAN Yaru WANG Fanggang HAO Yaxing HUA Jian XIN Yu 

机构地区：[1]Beijing Jiaotong University,Beijing 100044,China [2]ZTE Corporation,Shenzhen 518057,China

出　　处：《ZTE Communications》2025年第1期115-122,共8页中兴通讯技术(英文版)

基　　金：supported in part by the Fundamental Research Funds for the Central Universities under Grant No.2022JBQY004;the National Natural Science Foundation of China under Grant Nos.62471026 and 62221001;the Zhongguancun Xin Xi Disruptive Technology Innovation Foundation under Grant No.ZZ-2024-001;the Joint Funds for Railway Fundamental Research of National Natural Science Foundation of China under Grant No.U2368201;the Postdoctoral Fellowship Program and China Postdoctoral Science Foundation BX20240471;ZTE Industry-University-Institute Cooperation Funds under Grant No.HC-CN-03-2019-12。

摘　　要：Orthogonal time frequency space(OTFS)can resist the Doppler effect and guarantee reliable communication in high-speed scenarios.However,the Doppler rate induced by the relative acceleration between the transmitter and receiver degrades the performance of the OTFS.So far,the impact of the Doppler rate on OTFS systems has not been addressed.In this paper,we first introduce the Doppler rate in the OTFS system and derive the delay-Doppler domain input-output relation.In addition,the impact of the Doppler rate on the effective delay-Doppler domain channel is characterized by utilizing the first mean value theorem for definite integrals to avoid complicated integrals.To mitigate the effect of the Doppler rate,a large-scale antenna array is arranged at the receiver to separate each path of the multi-path channel through a high-resolution spatial matched filter beamformer.Next,the Doppler rate estimation scheme for an arbitrary order Doppler rate is proposed based on the successive interference cancellation pattern and the maximization of the spectrum of the ratio of high-order moments between the received samples in the identified branch and the transmitted samples.Finally,the estimation accuracy of the Doppler rate and the error performance of the proposed transceiver are validated by the numerical results.

关 键 词：BEAMFORMING Doppler rate OTFS 

分 类 号：TN9[电子电信—信息与通信工程]