Add White Gaussian Noise MATLAB

0
votes

When we use following Matlab function

signal=awgn(signal,5,'measured')

How much SNR do we have added to original signal? I mean the SNR is 5 dB? How can I add 20 dB noise to signal by using this command?

1
matlabsignal-processingnoise
According to the docs, the SNR of your syntax will be 5dB. So just change your 5 to a 20 if you want 20dB... – Dan

1 Answers

0
votes

Like Dan has mentioned in the comments, the second argument is used to set the value of SNR.

However, this is under the assumption that your signal has a power of 0 dBW. In case the signal power is different, you need to increase (or decrease) the value of the snr argument appropriately.