基带滤波在GLONASS卫星信号仿真器中的应用  

The Application of Base-band Filter in the Simulator of GLONASS

作　　者：范志良[1] 刘光斌[1] 

机构地区：[1]第二炮兵工程学院,西安710025

出　　处：《微计算机信息》2009年第25期146-148,共3页Control & Automation

摘　　要：分析了GLONASS卫星信号的频谱特性,针对其频谱混叠现象,首先采用CIC滤波器对GLONASS的基带信号进行插值滤波,然后再调制到相应的中频载波上;同时完成了CIC滤波器的FPGA实现,并分析了滤波对接收机信号捕获的影响。该方法使得产生的仿真信号在理论和实际上都达到了GLONASS系统要求,并通过实验验证了基带滤波在GLONASS卫星信号仿真中的可行性和有效性。The spectrum of GLONASS signals are analyzed in this paper. Considering the mixture in spectrum, the CIC filter is used to interpolate the base-band signal of GLONASS before the signals are modulated to the corresponding IF carrier. Also the filter is realized in FPGA, and the effects of the capture in the Receivers by the filter are analyzed in theoretics. At last the feasibility and validity of the base-band filter in the simulator of GLONASS are validated by the experiment.

关 键 词：GLONASS FPGA 基带滤波 信号仿真器 

分 类 号：TP337[自动化与计算机技术—计算机系统结构]