OFDM仿真包括信号源,卷积码编码，交织，qpsk调制，IFFT，组帧，上采样，通过FIR滤波器 通过高斯信道，再经过低通FIR滤波器，下采样，拆帧，FFT，qpsk解调，接收数据；计算误比特率-OFDM simulation including the signal source, sampling convolutional encoding, interleaving, QPSK modulation, IFFT, frame,, through the FIR filter throu

 结合理论课讲解基于Matlab仿真OFDM信号，绘制OFDM符号星座图，时域、频域曲线；  绘制发送端、接收端低通滤波器的幅频特性； 分析AWGN信道条件下OFDM系统的误码率性能( combined with the theory of lesson based on Matlab simulation OFDM signal, drawing OFDM symbol constellation, time domain, frequency