基于正交时频空间调制的通信感知一体化系统的公平性功率分配方案

doi:10.11959/j.issn.1000-0801.2022256

电信科学 ›› 2022, Vol. 38 ›› Issue (9): 50-59.doi: 10.11959/j.issn.1000-0801.2022256

• 专题：6G通感算融合技术 • 上一篇下一篇

基于正交时频空间调制的通信感知一体化系统的公平性功率分配方案

胥柯, 向路平, 胡杰, 杨鲲

电子科技大学信息与通信工程学院，四川成都 611731

修回日期:2022-09-07 出版日期:2022-09-20 发布日期:2022-09-01
作者简介:胥柯（1998- ），男，电子科技大学信息与通信工程学院硕士生，主要研究方向为正交时频空间调制、数能同传和通信感知一体化等
向路平（1993- ），男，博士，电子科技大学信息与通信工程学院讲师，主要研究方向为信道编码、正交时频空间调制和数能同传等
胡杰（1985- ），男，博士，电子科技大学信息与通信工程学院正高级研究员、博士生导师，主要研究方向为无线通信与组网中的物理层设计和资源分配、无线数据与能量一体化传输关键技术等
杨鲲（1969- ），男，博士，电子科技大学国家特聘教授，数能网络实验室主任，欧洲科学院（Academia Europaea）院士，主要研究方向为无线通信和网络、未来网络技术和移动边缘计算等
基金资助:
国家重点研发计划项目(2021YFB2900200)

Power allocation satisfying user fairness for integrated sensing and communication system based on orthogonal time frequency space modulation

Ke XU, Luping XIANG, Jie HU, Kun YANG

School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China

Revised:2022-09-07 Online:2022-09-20 Published:2022-09-01
Supported by:
The National Key Research and Development Program of China(2021YFB2900200)

摘要/Abstract

摘要：

通信感知一体化（integrated sensing and communication，ISAC）通过实现通信和雷达感知的资源共享，在人机交互、车联网（vehicle-to-everything，V2X）、遥感和环境检测等应用场景中很有前景。为解决高移动性的车联网中通信和雷达感知所需的频率资源的冲突，基于正交时频空间（orthogonal time frequency space， OTFS）调制提出了 OTFS-ISAC 系统，基站通过接收车辆反射的回波，获得车辆运动参数，从而建立车辆运动的移动拓扑模型。此外，针对多车辆移动场景，提出了保证用户公平性的非正交多址接入OTFS-ISAC系统设计和功率分配算法。仿真结果表明，相比于无雷达感知辅助的非正交多址OTFS系统，基于OTFS-ISAC的非正交多址接入系统实现了25%的信息速率提升。

关键词: 通信感知一体化, 正交时频空间调制, 车联网

Abstract:

By sharing resources for radar sensing and communications, integrated sensing and communication (ISAC) has promising applications in diverse scenarios, such as human-machine interface, vehicle-to-everything (V2X), remote sensing, and environment surveillance.In order to resolve the frequency resource conflict in high-speed V2X networks, based on the modulation orthogonal time frequency (OTFS), the OTFS-ISAC system was proposed, where the base station receives reflected echoes to obtain sensing parameters of vehicle motion and then establish the vehicle’s mobile topology.Additionally, in terms of the multi-vehicle network, the design of OTFS-ISAC with NOMAsatisfying the fairness and the algorithm of power allocation were proposed.Simulations show that compared with the NOMA without radar sensing system, the proposed design improves the system data rate by 25%.

Key words: integrated sensing and communication, orthogonal time frequency space modulation, vehicle-to-everything

中图分类号:

TP393

胥柯, 向路平, 胡杰, 杨鲲. 基于正交时频空间调制的通信感知一体化系统的公平性功率分配方案[J]. 电信科学, 2022, 38(9): 50-59.

Ke XU, Luping XIANG, Jie HU, Kun YANG. Power allocation satisfying user fairness for integrated sensing and communication system based on orthogonal time frequency space modulation[J]. Telecommunications Science, 2022, 38(9): 50-59.

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参数名称	变量名	参数值
发射功率/W	P_t	1
天线发送、接收增益/dB	G _t、G_r	0、0
载波频率/GHz	f_c	5
OTFS多普勒维度	k	1 024
OTFS时延维度	l	1 024
OTFS符号持续时间/ms	T_otfs	3.75
OFDM载波间隔/kHz	Δf	270
OFDM符号持续时间/μs	T_ofdm	3.67
OFDM载波数	M	1 024
OFDM时隙数	N	1 024
基站和车辆距离/m	d	0~15
普通NOMA上行开销	η	30%
导频开销	[M₀,N₀]	[60,30]

基于正交时频空间调制的通信感知一体化系统的公平性功率分配方案

Power allocation satisfying user fairness for integrated sensing and communication system based on orthogonal time frequency space modulation

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