摘要
5G是一个万物互联的高速率、高可靠性移动通信系统,必然使用高速基带数字调制解调技术。目前技术成熟、应用广泛的是基于二维星座映射的QAM方式,但因受到幅度阶梯数的瓶颈限制,调制能力最高的正方星座是256QAM和1024QAM,对传输环境的信噪比要求很高,很难用于移动通信系统。显然,基于三维星座的高速数字调制方式,将会成为5G系统的重要技术。在简单分析二维数字调制技术QAM的性能后,又分析了毫米波通信对高阶QAM的影响,并重点研究了三维正交幅度调制技术的误码率公式,并对三维QAM的三维星座和误码率进行了仿真。
The 5G is a mobile digital communication system with high speed and reliability,in which everything is connected. The high rate baseband digital modulation technique is must used. Currently the QAM based on two-dimension constel ation mapping is mature and widely used. But it is limited by the bottleneck of the amplitude ladder number,the tetragonal constel ations with the highest modulation capability are 256QAM and 1024QAM,the requirements of which on the signal noise rate of transmis-sion environment is very high,is difficult to be used to mobile communication system. Obviously,high speed digital modula-tion mode based on three-dimension constel ation wil be the key technique in 5G system. After simply analyzing the capability of two dimension QAM,it analyzes the effects of the mil imeter wave communication on the higher order QAM,researches the BER formula of three dimension QAM,simulates three-dimension constel ation and BER of three-dimension QAM.
出处
《邮电设计技术》
2016年第7期33-38,共6页
Designing Techniques of Posts and Telecommunications
