shav
Newbie level 2
Hi!
I have generated a sine signal with square envelope (signal for echolocation). My task is to add white gaussian noise, which I already did and then to filter the noise.
How can I filter the noise with this kind of signal? I tried Bandpass IIR, but it does not completely filter the noise.
Here are signal parameters:
Sine frequency: 5kHz
Square signal period: 0,2 s.
Below signal in time domain and the spectrum without the noise:
![spectrum.PNG spectrum.PNG](https://www.edaboard.com/data/attachments/75/75766-07c7a48fd11e713f3071853682fe6a3c.jpg)
Below signal in time domain and the spectrum with the noise:
![spectrum_noise.PNG spectrum_noise.PNG](https://www.edaboard.com/data/attachments/75/75768-bdc7a947050206b3f0731f6533d3f724.jpg)
I have generated a sine signal with square envelope (signal for echolocation). My task is to add white gaussian noise, which I already did and then to filter the noise.
How can I filter the noise with this kind of signal? I tried Bandpass IIR, but it does not completely filter the noise.
Here are signal parameters:
Sine frequency: 5kHz
Square signal period: 0,2 s.
Below signal in time domain and the spectrum without the noise:
![sig_in_time.PNG sig_in_time.PNG](https://www.edaboard.com/data/attachments/75/75765-39f9c912b8a0f63bcc7d57d6c5dac6bb.jpg)
![spectrum.PNG spectrum.PNG](https://www.edaboard.com/data/attachments/75/75766-07c7a48fd11e713f3071853682fe6a3c.jpg)
Below signal in time domain and the spectrum with the noise:
![sig_in_time_noise.PNG sig_in_time_noise.PNG](https://www.edaboard.com/data/attachments/75/75767-3176a30ba043d15925d522b496ac526a.jpg)
![spectrum_noise.PNG spectrum_noise.PNG](https://www.edaboard.com/data/attachments/75/75768-bdc7a947050206b3f0731f6533d3f724.jpg)