这是基于SPW仿真软件，做的QPSK信号产生、调制、解调的性能仿真图样-This is based on SPW simulation software, to do QPSK signal generation, modulation, demodulation performance simulation of pattern

基于matlab的QPSK信号产生仿真代码。信号产生与图形生成。-The QPSK signal is generated based on matlab simulation code. Signal generation and graphics generation.