摘要
通信感知融合是未来6G的核心问题,而通信感知一体化波形设计与信号处理、通感一体化联合性能研究是解决通信感知一体的关键技术。提出了一种面向通感一体的新型信号设计方案,通过设计尝试,发现它具备较宽的归一化功率谱密度、较高的峰旁瓣比和多自相关峰等特点。通过仿真评估,发现所提出的信号方案具备较好的定位性能,在15d B·Hz的情况下定位精度可达米级,且信号与其他候选信号之间的互相关小,具备更强的抗多径能力,同时在面向抗窄带干扰、频谱复用效率等性能上有出色的表现。因此,从技术可行性评估来看,该信号方案优于其他候选信号方案;从应用角度来看,所提出的信号方案可适用于新一代软件定义卫星或其他高空平台载荷搭载,也为B5G/6G和国家综合定位、导航、授时体系(PNTs)的信号设计提供理论参考。
Integrated sensing and communication(ISAC) has become the core problem of future 6G. Joint performance research, waveform design and signal processing are the key technologies to achieving ISAC. In this paper, a new signal design scheme for ISAC is proposed. Through the design attempt, it is found that the scheme has the characteristics of wide normalized power spectrum density, high peak-sidelobe ratio, and multiple autocorrelation peaks. Simulation results show that the proposed scheme has advanced localization performance. Specifically, it not only achieves meter-level positioning accuracy at 15 d B Hz, but also has small cross-correlation with other candidate signals, so it has a strong anti-multipath capability. Meanwhile, it also has an excellent performance in anti-narrowband interference and spectrum multiplexing. Therefore, from the perspective of technical feasibility evaluation, the proposed scheme is superior to other candidate signal schemes. From the application point of view, the proposed scheme can be applied to a new generation of softwaredefined satellites or other high-altitude platforms, and provides a theoretical reference for the signal design of B5G/6G and national comprehensive positioning, navigation, timing systems(PNTs).
作者
吉静
陈伟
卢红洋
李昌振
杜路遥
JI Jing;CHEN Wei;LU Hongyang;LI Changzhen;DU Luyao(Wuhan University of Technology,Wuhan 430070,China;Wuhan Xmgtuxinke Electronics Co.,Ltd.,Wuhan 430070,China;China Transport Telecommunications&Informatioii Center,Beying 100011,China)
出处
《移动通信》
2022年第5期62-68,共7页
Mobile Communications
基金
湖北省技术创新专项重大项目(2019AAA025)
国家重点研发计划(SQ2021YFB3900243)
国家自然科学基金青年项目(52102399)。
关键词
通感一体化
信号设计
软件定义卫星
integrated sensing and communication(ISAC)
signal design
software-defined satellite
