Re: mixed(Gaussian&impulse) noise removing - help needed
To remove gaussian noise first u have to verify the nature of the noise that can be done using 'Allan Variance Analysis' then there are several tools to eleminate noise based on the nature of your system (Analog or digital).
For Digital systems you can use Kalman filtering
For Analog systems you can apply Weiner filtering.
Note: Remember u can never remove Gaussian noise completely but can use the above method to estimate and reduce effectively.
If you still don't get the desired reduction in noise then do contact me here. I'll like to help.