无线电通信技术2025，Vol.51Issue(2)：244-254,11.DOI:10.3969/j.issn.1003-3114.2025.02.004
面向通信感知融合的扩展预编码OTFS波形设计
Expanded Precoding OTFS Waveform Design for Integrated Sensing and Communication
摘要
Abstract
Orthogonal Time Frequency Space(OTFS)modulation technology modulates information in the delay-Doppler domain and provides a robust solution for communication in high-mobility scenarios.However,like other multi-carrier techniques,OTFS suf-fers from high Peak-to-Average Power Ratio(PAPR),which can cause signal distortion and performance degradation.To address this,this paper proposes an adjustable expanded precoding scheme,where the expanded precoding matrix is uniformly represented as the product of a periodically expanded transformation matrix and an energy conservation matrix.By adjusting matrix dimensions,the pro-posed scheme achieves flexible PAPR reduction with only a slight increase in complexity.Additionally,this paper discusses the sensing performance of expanded precoding OTFS,derives its input-output relationship in the continuous delay-Doppler domain,and employs a two-stage search sensing algorithm based on delay-Doppler domain to study the accuracy of range and velocity estimation.Simulation re-sults demonstrate that the proposed expanded precoding scheme can reduce PAPR by at least 3 dB and achieve better bit error rate per-formance compared to traditional OTFS,while providing millimeter-level range estimation accuracy and decimeter-per-second-level ve-locity estimation accuracy.关键词
正交时频空调制/扩展预编码/峰均功率比/距离估计精度/速度估计精度Key words
OTFS modulation/expanded precoding/PAPR/range estimation accuracy/velocity estimation accuracy分类
电子信息工程引用本文复制引用
唐燕群,熊姣姣,杜津铭,周楠浩,周羽,易聪,朱嘉骏,张晓瀛..面向通信感知融合的扩展预编码OTFS波形设计[J].无线电通信技术,2025,51(2):244-254,11.基金项目
湖南省自然科学基金面上项目(2022JJ30047) （2022JJ30047）
广东省自然科学基金(2019A1515011622) General Program of Hunan Provincial Natural Science Foundation of China(2022JJ30047) （2019A1515011622）
Guangdong Provincial Natural Science Foundation of China(2019A1515011622) （2019A1515011622）
