Hello,
In the OFDM simulation, while adding the noise at the receiver, how can we calculate the noise power from the given SNR, which is defined as -- SNR per subcarrier per receive antenna?
If the Signal-to-Noise Ratio (SNR) is defined as the ratio of the power of the received signal to the power of the noise at the receiver, then the noise power can be calculated as follows:
SNR_linear = 10^(SNR_dB/10)
where SNR_dB is the SNR in decibels.
Signal_power = Number_of_subcarriers * Number_of_receive_antennas * Average_received_signal_power_per_subcarrier
where Average_received_signal_power_per_subcarrier is the average power of the received signal per subcarrier.
Noise_power = Signal_power / SNR_linear
This formula assumes that the noise power is the same for all subcarriers and receive antennas.
Note that this calculation provides an estimate of the noise power based on the assumption that the SNR is constant over all subcarriers and receive antennas. In practice, the SNR may vary, and the noise power may need to be estimated separately for each subcarrier and receive antenna.
- Badges
- Science topic