一种提高数字AM广播系统传输质量的方法  

Method of improving transmission quality in digital AM broadcasting system

作　　者：程继兴[1] 

机构地区：[1]莱芜职业技术学院,莱芜271100

出　　处：《电子测量技术》2006年第4期126-128,共3页Electronic Measurement Technology

摘　　要：本文在DRM标准的基础上,结合我国数字AM广播的实现方案,给出了一种在信号带宽只有DRM标准一半的情况下,保证数字AM广播系统的传输效率和传输质量的方法。文章重点讨论了用128-QAM和256-QAM来代替64-QAM,并对系统MSC的星座映射在64-QAM、128-QAM和256-QAM情况下的性能进行了仿真,还指出了用Turbo信道编码的方法可以提高较好的纠错性能。本方案采用128-QAM星座映射并结合Turbo码,来实现较好的传输质量。In this thesis, a method of improving transmission quality in digital AM broadcasting system is proposed based on the DRM standard and according to the practical instance of our country. How to guarantee the transmission rate and quality are answered in this paper. The amelioration of the MSC signal constellations and mapping is researched emphatically, the key problem is the application of 128-QAM and 256-QAM instead of 64-QAM. We also test their performance and give the relevant analysis to the system. This paper points out that Turbo code has a better performance. , 128-QAM and Turbo code are used together to guarantee the transmission quality.

关 键 词：数字AM广播 星座映射 传输质量 TURBO码 

分 类 号：TN934.3[电子电信—信号与信息处理]