基于导频辅助的OTFS载波同步技术  

Pilot-aided OTFS Carrier Synchronization Technology

作　　者：肖之长 彭丽 张沉思 葛建华[1] XIAO Zhichang;PENG Li;ZHANG Chensi;GE Jianhua(State Key Laboratory of Integrated Service Network,Xidian University,Xi′an 710071,China;Military Representative Bureau of Air Force Armament Department in Beijing,Beijing 100071,China)

机构地区：[1]西安电子科技大学综合业务网理论及关键技术国家重点实验室,陕西西安710071 [2]空军装备部驻北京地区军事代表局,北京100071

出　　处：《无线电通信技术》2021年第3期315-318,共4页Radio Communications Technology

基　　金：陕西省重点研发计划项目(2019ZDLGY07-02)。

摘　　要：正交时频空(Orthogonal Time Frequency Space,OTFS)是近年来被首次提出的一项新型调制技术,能够在高速移动等具有高多普勒的通信场景中工作。目前关于该技术的接收机算法研究,主要集中在信道状态信息已知时的均衡算法上,而针对此技术的同步算法并未得到充分研究。对此,在现有导频辅助的信道估计算法基础上,提出一种OTFS系统在时域的载波同步技术。所提方法在计算形式上具有易于硬件实现的特点,且仿真结果表明其误码率能够满足工作需要,从而证明了OTFS系统在调制域估偏,然后在时域进行纠偏的可行性。Orthogonal Time Frequency Space(OTFS)is a newly proposed modulation technique,which is suitable for some communication scenarios with high Doppler properties,,such as high speed mobility.Currently,receiver algorithm research on this technique focuses on the balance algorithms with known channel state information.And synchronization algorithm is not thoroughly investigated.This paper,based on pilot-aided channel estimation algorithm,proposes a carrier synchronization algorithm with OTFS in time domain.The proposed algorithm is easy for hardware implementation.Simulation results show that the BER also meet operation requirement.And the feasibility of using OTFS for modulation domain estimation and time domain correction is also proved.

关 键 词：导频 OTFS 时延-多普勒域 OFDM 载波同步 

分 类 号：TN911[电子电信—通信与信息系统]