SNR estimation prior to demodulation?

1. What is the need to find the SNR estimation?
2. What does SNR depend on?
3. How do you calculate audio SNR?
4. Why SNR is measured in dB?

What is the need to find the SNR estimation?

The importance of accurately calculating the signal to noise ratio is imperative to the ultimate goal of efficient and accurate designs. Furthermore, computing the SNR will also provide insight into design functionality and design performance.

What does SNR depend on?

SNR also depends on the number of transmitter and receiver elements within the RF coils. The higher the number of transmitter and receiver elements, the better the SNR eg. a 32-channel (receiver element) body coil will produce better SNR compared to a 4-channel body coil.

How do you calculate audio SNR?

The SNR is calculated with the desired output from the device divided by the background noise. This can be expressed as either a percentage or as a decibel value. The DB value is calculated by using 20 log desired signal divided by noise. The ratio can produce small and large numbers.

Why SNR is measured in dB?

More specifically, SNR is measured in dB, because dB are convenient for the situation. dBs are convinient for the situation, as the differences of signal and noise can have a large dynamic range, that is, to be small or very large. So the SNR of 100000V signal with 1V noise is 100000.