The PSD can be computed by taking the ratio of the signal power to bandwidth.
To compute the Power spectral density, enter
- Signal power Ps in either Watt/Milliwatt/Microwatt/Nanowatt OR dBm
- Bandwidth BW in GHz/MHz/kHz/Hz
PSD = Ps/BW
A total power of 10 Watt across bandwidth of 1 kHz results in a PSD of 0.01 W/Hz or 10 dBm/Hz.
This calculator can be used to determine the noise power spectral density.
SNR (in dB) is the difference between the PSD and the noise density.