Add Gaussian Noise to a Signal
조회 수: 13 (최근 30일)
이전 댓글 표시
I'm trying to add a 65 db Gaussian noise to a current signal. With the following function:
Ia = awgn(Ia,65)
The problem is that apparently the signal is not suffering any kind of noise.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/895115/image.jpeg)
댓글 수: 0
채택된 답변
Voss
2022년 2월 15일
65 dB is a high enough SNR that you can't tell the difference visually between a signal with no noise and a signal with noise 65 dB down added to it:
SNR = 65;
t = linspace(0,20,10000);
Ia = sin(2*pi*1000*t);
Ia_noise = awgn(Ia,SNR);
figure
plot(t,Ia,'LineWidth',2);
hold on
plot(t,Ia_noise,':');
But if you drop SNR down (to around 35-40 or lower in this particular example), you can see the difference:
SNR = 35;
t = linspace(0,20,10000);
Ia = sin(2*pi*1000*t);
Ia_noise = awgn(Ia,SNR);
figure
plot(t,Ia,'LineWidth',2);
hold on
plot(t,Ia_noise,':');
댓글 수: 0
추가 답변 (0개)
참고 항목
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!