I need to generate random white Gaussian noise of some x second length. I also need to add multiple sinusoidal pulses of y (y<<x) duration and SNRs of a dB, b dB and c dB respectively at random locations in x sec length Gaussian noise.
Can any one kindly help me ?
Also how can i verify the results i.e. the required SNR has been generated?
Thanks for helping material.
The article is clear in case of single pulse as i understand it. As i have to insert multiple pulses at different locations with different SNRs, should i repeat the 4 steps mentioned in article separately for all pulses and then simply add them together?
Well in that case :
Suppose your signal chunks are X1, X2, X3, ....Xn and your SNR requirement is SNR_dB1, SNR_dB2, SNR_dB3, .... SNR_dBn
You do as :
Y1 = add_awgn_noise(X1,SNR_dB1);
Y2 = add_awgn_noise(X2,SNR_dB2);
Y3 = add_awgn_noise(X2,SNR_dB3);
Yn = add_awgn_noise(X2,SNR_dBn);
And finally you concatenate Y1, Y2, Y3, .... Yn.