| 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Ga
lileo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。 |
| 关键词: 导航卫星信号仿真 信号合成 Galileo系统 CBOC 功率控制 |
| DOI： |
|
| 基金项目:军队重点科研项目(EP050068-23) |
|
| Signal Synthesis Technique for Galileo E1-B/C Signal Simulation |
| XIE Jie,ZHANG Bo,HOU Bo,YAO Zhi-cheng,LIU Guang-bin |
| (The Second Artillery Engineering College, Xi′an 710025, China) |
| Abstract: |
| By studying characteristics of Galileo E1 PRN code, a PRN generator ba
sed 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 appr
oximately. Experiment results indicate that techniques proposed in this paper ca
n 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 pro
blems in applying Galileo E1-B/C signal simulator is solved. |
| Key words: navigation satellite signal simulation signal synthesis Galileo system CBOC attenuation control |
《电讯技术》编辑部 