文中构建了一种以LabVIEW为软件平台的多通道噪声倍频程分析系统,介绍了系统构成与工作原理,详细阐述了信号调理电路放大设计方法,并采用滤波器组法实现了噪声信号的倍频程谱分析。该系统具备9个可同时工作的测量通道,人机交互界面友好...文中构建了一种以LabVIEW为软件平台的多通道噪声倍频程分析系统,介绍了系统构成与工作原理,详细阐述了信号调理电路放大设计方法,并采用滤波器组法实现了噪声信号的倍频程谱分析。该系统具备9个可同时工作的测量通道,人机交互界面友好,具有数据存储、报表打印等管理功能,提高了系统的智能性和灵活性。实测结果表明,该系统的倍频程滤波器组满足国家标准GB/T 3241-2010规定的1级衰减要求,同一信号经任意两通道测量的声压级误差小于0.3 d B,可用于多点噪声倍频程测量与分析的场合。展开更多
In this paper,the conventional method of establishing spatial channel models(SCMs)based on measurements is extended by including clusters-of-scatterers(CoSs)that exist along propagation paths.The channel models result...In this paper,the conventional method of establishing spatial channel models(SCMs)based on measurements is extended by including clusters-of-scatterers(CoSs)that exist along propagation paths.The channel models resulted utilizing this new method are applicable for generating channel realizations of reasonable spatial consistency,which is required for designing techniques and systems of the fifth generation wireless communications.The scatterers’locations are estimated from channel measurement data obtained using large-scale antenna arrays through the Space-Alternating Generalized Expectation-Maximization(SAGE)algorithm derived under a spherical wavefront assumption.The stochastic properties of CoSs extracted from real measurement data in an indoor environment are presented.展开更多
文摘文中构建了一种以LabVIEW为软件平台的多通道噪声倍频程分析系统,介绍了系统构成与工作原理,详细阐述了信号调理电路放大设计方法,并采用滤波器组法实现了噪声信号的倍频程谱分析。该系统具备9个可同时工作的测量通道,人机交互界面友好,具有数据存储、报表打印等管理功能,提高了系统的智能性和灵活性。实测结果表明,该系统的倍频程滤波器组满足国家标准GB/T 3241-2010规定的1级衰减要求,同一信号经任意两通道测量的声压级误差小于0.3 d B,可用于多点噪声倍频程测量与分析的场合。
基金jointly supported by the key project “5G Ka frequency bands and higher and lower frequency band cooperative trail system research and development” of China Ministry of Industry and Information Technology under Grant number 2016ZX03001015the Hong Kong,Macao and Taiwan Science&Technology Cooperation Program of China under Grant No.2014DFT10290.
文摘In this paper,the conventional method of establishing spatial channel models(SCMs)based on measurements is extended by including clusters-of-scatterers(CoSs)that exist along propagation paths.The channel models resulted utilizing this new method are applicable for generating channel realizations of reasonable spatial consistency,which is required for designing techniques and systems of the fifth generation wireless communications.The scatterers’locations are estimated from channel measurement data obtained using large-scale antenna arrays through the Space-Alternating Generalized Expectation-Maximization(SAGE)algorithm derived under a spherical wavefront assumption.The stochastic properties of CoSs extracted from real measurement data in an indoor environment are presented.
