How to calculate energy of an OFDM signal?

1. How is OFDM bandwidth calculated?
2. How do you calculate the number of subcarriers in OFDM?
3. What are the parameters of OFDM?

How is OFDM bandwidth calculated?

Thus the bandwidth of the OFDM baseband signal is N/2*delta_f,delta_f is the sub-carrier frequency spacing. The sub-carrier frequency spacing delta_f =1/Ts= 1/(Td * N), Ts is the OFDM symbol duration,Td is the sampling symbol duration and equal to the smapling time interval。 Thus Td=1/fs, fs is the DAC sampling rate.

How do you calculate the number of subcarriers in OFDM?

If you divide the channel bandwidth (20 MHz) by the subcarrier bandwidth (312.5 kHz) you will see that 802.11a/g comprises 64 subcarriers.

What are the parameters of OFDM?

Once the incoming signal is classified as an OFDM modu- lation, parameter extraction is carried out. In this paper, these parameters include symbol duration, cyclic prefix duration and number of subcarriers. First, a cyclostationarity test is applied to the incoming signal to detect the OFDM symbol duration Ts.