GPS接收机应用于手机中所遇到的射频干扰

将GPS接收机嵌入到手机硬件中,GPS接收频率将与手机中其它射频源共存.这些射频源包括GSM,UMTS,WLAN和Bluetooth.指出这些射频源对GPS接收信号的干扰程度,以明确哪种射频源对GPS接收机的阻塞影响最大,成为提出相应的解决方案是关键.验证方法主要是由Texas Instrument提供的GPS评估板接收来自GPS卫星模拟器发出的GPS信息,由具备GSM,UMTS,WLAN,Bluetooth功能的手机分别对GPS评估板发出不同的射频传导信号.结果证明:主要验证了UMTS1 900 MHz作为手机发射源时,对GPS接收机的阻塞影响最大,对改善GPS接收机带通滤波器的性能,为抑制UMTS信号起到很好的作用.

GPS Receiver in Mobile Phone Application RF Coexistence Issues

When GPS(Global Positioning Finding System)receiver integrated into mobile phone,GPS frequency coexists with other radio frequencies used by mobile phone,they are GSM(Globel System for Mobile Communication),UMTS(Universal Mobile Telecommunications),WLAN(Wireless Local Area Network)and Bluetooth.The most important thing is how big the interference from those radio frequencies to the GPS receiver,and which one is the biggest,it also needs to get out the solution.The method is mainly used to input the interfer...