基于matlab的QPSK仿真，是老师布置的一个期中作业，我自己做的-Based on the matlab QPSK simulation, was assigned by the teacher a midterm homework, I made it myself

通信系统仿真大作业，卷积码编码，QPSK调制，接收端维特比软判决。程序正确。-Communication system simulation a large operation, convolution coding, QPSK modulation, soft-decision Viterbi receiver. Program is correct.