GPS中频信号生成器的FPGA设计

Design of GPS IF signal generator in FPGA

介绍了一种GPS中频信号生成器的设计,利用了Xilinx公司的microblaze软核技术,生成器的核心部分在一块FPGA内部实现。降低了电路设计的复杂性以及实现成本,并且使得系统更具灵活性和扩展性。将详细描述生成器核心部分中microblaze系统的搭建以及关键逻辑电路的设计,最后给出生成器输出中频信号的频谱分析结果,并使用GPS接收机对上变频后的信号进行了接收测试。

A kind of design for GPS IF signal generator is introduced in the article. The key block of the design is implemented in one FPGA chip under the support of the microblaze soft core technology of Xilinx. In this way the complexity and cost of circuit are reduced, and the system is made more flexible and easier to update. The article will describe the details of the construction of rnicroblaze system and the logic circuit in the key block of the generator. And the frequency spectra analysis of the IF signal will be shown at the last of the article as well as the test results by GPS receiver.