这是一个多用途的测量电路，可以用于测量电阻，测量电流，测量电压～-This is a multi-purpose measurement circuit can be used to measure resistance, measuring current, measuring voltage ~

仿真QPSK信号通过瑞利衰落信道的误比特率，并与AWGN信道下误比特率进行比对-Simulation of QPSK signal through the Rayleigh fading channel bit error rate, and AWGN channel bit error rate comparison