伽利略E5波段信号扩频码基于VHDL的FPGA器件设计

Design of Galileo E5-Signal Spreading Code Based on FPGA

介绍了伽利略卫星信号E5波段的基带信号结构,详细讲述了伽利略卫星信号中E5波段扩频码的结构和扩频码基于伪随机序列的线性移位寄存器的产生方法,给出了基于VHDL的FPGA器件设计方案以及modelsim仿真结果和signalta-pII逻辑分析器捕获FPGA中的最终信号结果,由最终结果可知采用FPGA来实现伽利略伪卫星的E5,E1,L1波段的基带信号合成是非常简单易行的。

The structure of the Galileo E5 baseband-signal will be introduced. And the structure of spreading frequency code in the Galileo E5 signal and generating method of linear shift register that is based on pseudo-noise sequences for this code will be detailly introduced. Also, the design method with FPGA based on VHDL, the simulation waveform in modelsim and final FPGA signals which were captured by signalta-pⅡ will be lay out. By the final result, we will know that to generating the mixture of the Galileo E5, E1 and L1 baseband-signal in FPGA is very simple and feasible.