摘要
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。
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.
出处
《电子设计工程》
2012年第6期16-18,22,共4页
Electronic Design Engineering
