滚降系数不匹配对基带传输系统的性能影响  

The effects of mismatched roll-off factor on the performance of digital baseband transmission system

作　　者：左金钟[1] 马伊民[1] 习清伶[1] 

机构地区：[1]中国空间技术研究院西安分院,西安710100

出　　处：《国外电子测量技术》2011年第8期21-28,共8页Foreign Electronic Measurement Technology

摘　　要：介绍了高速数字基带传输系统的基本要求,重点仿真分析了滚降系数不匹配时,采用数字成形滤波技术对数字基带传输系统的性能的影响。仿真结果表明,滚降系数误差对高速数字基带传输系统有重要的影响,通过调节接收端的滚降系数能改善系统性能。对工程中数字基带传输系统的设计与研究以及高速通信中的成形滤波器的实现有着重要的指导意义。In this paper, basic design requirement of high digital baseband transmission system is introduced, and the effects of mismatched roll-off factor on the performance of digital baseband transmission system is analyzed. The simulation results indicate that it is significant to investigate the effects of roll-off factor error on the system, and it is reasonable to improve the performance with adjusting the roll-off factor of the receiver. It is useful for the practical design and research of digital baseband transmission system and also helpful for the implementation of shaping filter in high speed communication system.

关 键 词：平方根升余弦成形滤波器 滚降系数 数字基带传输系统 误码性能 

分 类 号：TN914[电子电信—通信与信息系统]