基于FPGA的GPS基带产生与控制模块设计

摘要

全球定位系统(GPS)基带信号可以用于导航定位设备的研发、性能测试以及生成式欺骗干扰信号的产生.针对一种基于现场可编程门阵列(FPGA)的GPS基带信号产生与控制模块进行研究,主要通过硬件电路设计和软件代码编写,利用FPGA生成C/A码、P码,利用直接数字式频率合成器(DDS)产生L1、L2载波等功能,实现了多路可控增益GPS信号同时输出.测试结果表明,本设计输出增益可调、输出频点可控,可以为射频模块提供多路基带信号及控制信号.%Global Positioning System(GPS) baseband can be used to test the performance of navigation and positioning equipment research and generate deception jamming signal.The design and realization of GPS baseband generation and control module based on field programmable gate array (FPGA) are presented,which includes hardware circuit design and code writing.It realizes multichannel controllable gain GPS signal output at the same time,generates C/A code and P code by using FPGA,and generates carriers L1,L2 by using direct digital frequency synthesizer(DDS).It shows that the design has the adjustable output gain and the controllable output frequency,and can provide multi-channel the baseband signals and control signals for RF module.