Howtosignalprocessing
Negative SNR (Signal to Noise Ratio) when expressed in dB just means that you have more noise than signal. For simple communications systems this means you have no useful signal and so can not make reliable estimates of the transmitted information.
- What does it mean to have a negative SNR?
- Should SNR be positive or negative?
- What is a good SNR dB?
- What does negative noise mean?
What does it mean to have a negative SNR?
SNR can be either positive and negative value if you represent it in dB scale. Negative SNR means that Signal power is lower than the noise power.
Should SNR be positive or negative?
As SNR is simply the ratio , and we know that ratio should be anything i.e positive or negative. But for practical case SNR should always be positive value means signal power should always be greater than the noise power. If it is negative than that system has no significance....
What is a good SNR dB?
Generally, a signal with an SNR value of 20 dB or more is recommended for data networks where as an SNR value of 25 dB or more is recommended for networks that use voice applications. Learn more about Signal-to-Noise Ratio.
What does negative noise mean?
A positive dB means that the sound is a few times louder than the threshold, while a negative dB means that you are a few times softer than that threshold.
