I got my BER vs SNR graph as shown. I was trying to show the difference in BER with OFDM signal transmission under Doppler effect and without Doppler effect. However, based on my understanding, the BER with Doppler effect should be worse than without Doppler effect. I wonder is my BER vs SNR graph showing decent Doppler effect ?
I tried to simulate doppler effect by the following
[Q1,M1] = rat(1+doppler_scale); %the received signal(tf_ofdm1) after convolution of input signal with channel is resampled tf_ofdm = resample(tf_ofdm1, M1, Q1); %Noise is added -> rt_ofdm1 %At the receiver, err_dopp = 2e-3; %error in Doppler scale estimation [Q2, M2] = rat(1+(1-err_dopp)*doppler_scale); rt_ofdm = resample(rt_ofdm1, Q2,M2); %proceed to demodulation and calculate BER.