摘要
频谱感知(Spectrum Sensing,SS)技术能有效地提高频谱利用率,在每一代通信系统中都发挥着重要作用。考虑到未来通信系统中涉及大量非正交多址(Non-orthogonal Multiple Access,NOMA)场景,需要设计契合未来复杂通信环境的新一代频谱感知技术。结合多用户下行非正交系统的特点,提出了频谱感知的加权融合合并判决方法,并设计了工作流程和推导了相应的阈值表达式闭式解。仿真结果表明,所提方法与现有方法相比有较显著优势,对于不同用户功率比和信噪比(Signal to Noise Ratio,SNR)有稳定的性能,在实际的NOMA场景中有较好的实用性。
Spectrum Sensing(SS)technology can effectively improve spectrum utilization and has played an important role in every generation of communication systems.Considering that the future communication system involves a large number of Non-orthogonal Multiple Access(NOMA)scenarios,it is necessary to design a new generation of spectrum sensing technologies in order to fit the future complex communication environment.Combined with the characteristics of the downlink NOMA system with multi-user,a weighted fusion decision method for spectrum sensing is proposed,and then the workflow is designed and the closed-form solutions of threshold expressions are derived.The simulation results show that the proposed technology has significant advantages over the existing technologies,and has stable performance for different power ratios and Signal to Noise Ratio(SNR),which has good practicability in the actual NOMA scenarios.
作者
吴静怡
徐天衡
周婷
胡宏林
WU Jingyi;XU Tianheng;ZHOU Ting;HU Honglin(Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201210,China;University of the Chinese Academy of Sciences,Beijing 100049,China;Shanghai Frontier Innovation Research Institute,Shanghai 201100,China)
出处
《无线电工程》
北大核心
2022年第12期2149-2155,共7页
Radio Engineering
基金
国家重点研发计划(2020YFB1806600)
上海市科委重大项目(21511101400)。
作者简介
吴静怡,女,(1998-),就读于中国科学院上海高等研究院电子信息专业,硕士研究生。主要研究方向:非正交多址技术、新一代频谱感知技术;徐天衡,男,(1989-),博士,副研究员。主要研究方向:B5G/6G移动通信关键技术、隐性维信号传输技术;周婷,女,(1982-),博士,研究员。主要研究方向:异构融合网络协同关键技术、下一代无线网络等;胡宏林,男,(1975-),博士,研究员。主要研究方向:信号与通信系统、移动通信系统与异构网络优化等。
