I have this OFDM simulation in simulink, but now I want to measure its PAPR, can anyone help me with that; what exact block should I chose to put it into my simulation.
You have to use a time scope to get the signal as a function of time x(t) after the ifft block. You can process this signal to get the average power as P average= Sum x[n]^2/N where N is the total number of samples in the signal. The signal itself must contain many ofdm symbols to be statistically expressive. The peak power Pm is the maximum scored power in the N samples. The peak to average power ratio is then the ratio of Pm to Paverage.
You have to use a time scope to get the signal as a function of time x(t) after the ifft block. You can process this signal to get the average power as P average= Sum x[n]^2/N where N is the total number of samples in the signal. The signal itself must contain many ofdm symbols to be statistically expressive. The peak power Pm is the maximum scored power in the N samples. The peak to average power ratio is then the ratio of Pm to Paverage.