Howtosignalprocessing
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.... No, Vikram Kumar!
- What does a positive SNR mean?
- Can SNR value be negative?
- What does it mean to have a negative SNR?
- Is a positive SNR good?
- What is a normal SNR value?
What does a positive SNR mean?
SNR (dB) = Preceived_signal (dBm) - Pnoise (dBm) SNR (dB) = -65 dBm -(-90 dBm) = 25 dB. The positive SNR means that the signal power is greater than the noise power, i.e. the receiver will be able to demodulate the signal.
Can SNR value be negative?
The ratio can be zero, a positive number or a negative number. A signal-to-noise ratio over 0 dB indicates that the signal level is greater than the noise level.
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.
Is a positive SNR good?
An SNR greater than 40 dB is considered excellent, whereas a SNR below 15 dB may result in a slow, unreliable connection.
What is a normal SNR value?
The range of SNR may vary between 1dB and 30dB. The optimum SNR range is 18–30dB. 18dB is the minimum value at which the device can still operate and deliver relatively optimum performance. Values lower than 18dB can drastically reduce the performance.
