基于FPGA的MSK调制器设计与实现

介绍了MSK信号的优点,并分析了其实现原理,提出一种MSK高性能数字调制器的FPGA实现方案;采用自顶向下的设计思想,将系统分成串/并变换器、差分编码器、数控振荡器、移相器、乘法电路和加法电路等6大模块,重点论述了串/并变换、差分编码、数控振荡器的实现,用原理图输入、VHDL语言设计相结合的多种设计方法,分别实现了各模块的具体设计,并给出了其在QuartusII环境下的仿真结果。结果表明,基于FPGA的MSK调制器,设计简单,便于修改和调试,性能稳定。

Design and realization of MSK modulation based on FPGA technique

The advantage of MSK is introduced,the implementation principle is analyzed.A high-preformance MSK digital modulator’s implementation method based on FPGA is proposed;The system is divied into serial/parallel conversion,differential encoding,NCO,phase shifter,multiplication circuit and adder using Top-to-Down design;And achieved the specific design of each module by schematic and VHDL;The simulation and experiment of FPGA design were given with QuartusII.Result shows the MSK modulator based on FPGA,simple in design,convenient to modify or debug,and it operates stable.