介绍了qpsk调制解调及Dijkstra最短路径算法，并给出了仿真的结果和程序。-Introduced qpsk modem and Dijkstra shortest path algorithm, and the simulation results and procedures.

利用FPGA实现QPSK数字调制。编程采用Verilog HDL语言。-By using the FPGA realization of QPSK digital modulation. Use Verilog HDL language programming.