基于FPGA的混合扩频发射机设计与实现

摘要

A direct sequence/frequency hopping spread spectrum transmitter taking Alter FPGA as a hardware platform and QuartusII as a design tool was implemented. Each module was designed with Verilog HDL and the top layer of the system was designed with the graphic method. RS code (255,223) and convolution code (2,1,7) are adopted in the coding module. Gold code sequence is adopted in the spread spectrum module, and MSK modulation technology is adopted in the modulation module. The simulation results indicate that each module meets the design requirements, and the system output is stable without burr. The desired result was achieved.%以Alter公司的FPGA为硬件平台,以QuartusⅡ为设计工具,来实现该直扩/跳频混合发射系统.顶层采用图形设计方式,各个模块均采用Verilog语言进行设计.编码模块采用了RS(255,223)码与卷积码(2,1,7)相结合,扩频模块采用GOID码序列进行扩频,调制模块采用MSK调制.仿真结果表明:各个仿真模块均满足设计的要求,整个系统输出稳定无毛刺,达到了预期的效果.