摘要
介绍了集群通信系统由模拟到数字、从窄带到宽带的发展过程,分别对比了已在国内广泛应用的4种窄带数字集群通信系统和2种宽带数字集群通信系统的关键技术及其性能,并分析了它们各自在不同环境中的优势。详细地分析了一种典型的宽带数字集群通信系统——基于TD-LTE(time-division long-term evolution)技术的数字集群通信系统中所应用的正交频分复用、多入多出、时分双工以及混合自动重传等关键技术的工作原理和优点,并介绍了目前对基于TD-LTE的宽带数字集群通信系统的研究进展,以及它在城市轨道交通通信、石油专网通信、高速铁路通信以及城市应急通信等情况下的应用现状和发展趋势。最后对数字集群通信系统在国内的发展现状做出分析总结,并展望了数字集群通信系统在国内外的发展前景。
This paper introduces the developmental process of trunked communication system from the analog to the digital,from the narrowband to the broadband,and also examines comparatively the key technology and performance index of four narrowband trunked communication systems and tow broadband trunked communication systems which have been widely used in our country,and also analyzes advantages of each system. The present study analyze the working principle and advantages of technologies as orthogonal frequency division multiplexing,multiple-input multiple-output,time division duplexing and hybrid automatic repeat request which were used in a typical broadband digital trunked communication system—the trunked communication systems based on TE-LTE（ time-division long-term evolution）,and introduces resent research related,and its applications in urban rail transportation communication,oil production communication,high-speed railway communication and emergency communication. Finally,our study summarizes the domestic developmental status of trunked communication and expounds the development tendency of trunked communication at home and abroad.
出处
《重庆邮电大学学报（自然科学版）》
CSCD
北大核心
2016年第6期777-782,共6页
Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)
关键词
数字集群通信
协议标准
TD-LTE
发展趋势
digital trunked communication
protocol standards
td-lte
development tendency
