射频直接采样多频GNSS信号采集系统的实现  

Implementation of a Multi-frequency GNSS Signal Collecting System Based on Direct-RF Sampling

作　　者：杨亮[1] 郭佩[1] 秦红磊[1] 

机构地区：[1]北京航空航天大学电子信息工程学院,北京100191

出　　处：《电讯技术》2011年第8期51-55,共5页Telecommunication Engineering

摘　　要：设计了一种多频信号采集系统。系统使用射频直接采样技术,不需混频,对多频信号同时采样。然后进行分路滤波,最后通过以太网对多路信号进行同步采集。该方法不仅使系统结构简单灵活,同时减少了由模拟组件引入的干扰。实验结果表明,系统能够连续地采集多个频带的数据,并通过对"北斗"系统(COMPASS)信号的捕获验证了系统的有效性。A multi-frequency signal collecting system is designed. The system uses RF direct-sampling without mixing and samples the multi-frequency signals at the same time. After optical filtering, it collects the multi-fre- quency signals simultaneously through the Ethernet. This design can not only make the system simple and flexi- ble, but also decrease the interference of the analog components. Experimental results show that the system can continuously collect data from multiple frequencies, which verifies the feasibility of the system by capturing the COMPSS signals.

关 键 词：全球导航卫星系统 射频直接采样 带通采样 多频接收机 软件无线电 以太网 

分 类 号：TN911[电子电信—通信与信息系统] TN965[电子电信—信息与通信工程]