Galileo E1-B/C仿真信号合成通道设计  

Signal Synthesis Technique for Galileo E1-B/C Signal Simulation

作　　者：谢杰[1] 张博[1] 侯博 姚志成[1] 刘光斌[1] 

机构地区：[1]第二炮兵工程大学,西安710025

出　　处：《电讯技术》2011年第12期78-82,共5页Telecommunication Engineering

基　　金：军队重点科研项目(EP050068-23)~~

摘　　要：针对Galileo信号合成中超长测距码生成以及功率控制的硬件实现难题,设计了双口RAM的重载查表式测距码生成器,同时,基于CBOC副载波特性,提出了比例因子功率控制的优化方法,并进行了仿真实验对比。结果表明:该方法设计的信号合成通道极大地节约了内存空间和硬件乘法器资源,单片FPGA内信号合成通道的集成数量扩大1倍以上,合成的Galileo信号具有理想CBOC信号特征,且接收机定位解算正确,解决了仿真信号的硬件实现难题。By studying characteristics of Galileo E1 PRN code, a PRN generator based on RAM is designed in this paper. A signal attenuation control method based on software is proposed to allocate power of the two CBOC signal components approximately. Experiment results indicate that techniques proposed in this paper can save most of the Block RAM and DSP48. The number of synthesis channels in FPGA can be doubled. Features of the synthesized Galileo signal, which is verified by Galileo software receiver, are identical with those of ideal CBOC signal. One of the problems in applying Galileo E1 - B/C signal simulator is solved.

关 键 词：导航卫星信号仿真 信号合成 GALILEO系统 CBOC 功率控制 

分 类 号：TN965[电子电信—信号与信息处理]