在调幅干扰下的UM71轨道电路信号的频域识别  

UM71 track circuit signal identification in frequency domain with AM interference

作　　者：赵胜凯[1] 邱宽民[1] 赵明[1] 

机构地区：[1]北方交通大学电子信息工程学院,北京100044

出　　处：《铁道学报》2001年第2期109-111,共3页Journal of the China Railway Society

基　　金：铁道部科技研究开发计划项目!(2 0 0 0 X0 1 7- B)

摘　　要：目前随着频谱分析技术在铁路中的应用 ,人们发现当调制系数较小时的频移键控 (FSK)信号 (如 UM71轨道电路信号 )与调幅 (AM)信号的频谱图非常相似 ,很难区分。本文从理论上分析了这两种信号的频谱特点 ,指出它们在频域内的本质区别 ,提出一种能从根本上消除 AM信号对 FSK信号干扰的解决方案。With the wide application of spectrum analysis techniques in railway, it is discovered that the spectrums of FSK signal and AM signal are very similar, and very difficult to be distinguished. A theoretical analysis is done to the spectrums of these two signals in this paper. The essential difference between these two signals in frequency domain is pointed out. A resolution method is proposed to eliminate the interference of AM signal to FSK signal.

关 键 词：调幅信号 频移键控信号 频谱分析 相角 铁路 轨道电路信号 频域识别 

分 类 号：U284.2[交通运输工程—交通信息工程及控制]