摘要
本文通过分析GSM-R系统的频率范围,论述了GSM-R系统可能遭受的各种合法或非法的干扰类型,如CDMA信号,一些非法基站发射的信号等。传统的无线干扰源定位是利用一台车载频谱分析仪对接收信号进行频域计算,得到信号的频谱成分从而确定接收信号是否存在干扰信号,这种方法比较耗时,因此为了提高定位的实时性,本文提出了直接将接收信号混频并以零中频输出,并以GPS为辅助工具实时地定位GSM-R干扰源,优化GSM-R通信网络。
This paper discusses various sources to disturb the GSM-R system, which are legal or illegal, by analyzing the frequency-domain, such as some signals from CDMA and some illegal bases. A conventional method to locate the disturbing sources is by using a mobile scope, basing on the frequency-domain, to make sure whether any disturbing wireless signals exit. However this will take a lot of time, therefore, a new method is proposed to settle it. To locate the wireless disturbing sources, the signals received are mixed to make sure the carrier frequency is nearly zero. Besides, the experiment includes a GPS, which consisting of an antenna and a RF circuit to locate the GSM-R sources as quickly as possible to optimize the communication.
出处
《电子测量技术》
2007年第7期122-124,共3页
Electronic Measurement Technology
关键词
GSM-R
干扰
定位
GSM-R
disturbing sources
locate
