Fast FIR Filter: Removing Linear Phase & Minimizing Distortion

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To remove the linear phase introduced by windowing in an FIR filter, advancing the signal before filtering can effectively cancel out the filter's delay, bringing the signal back to time zero. The discussion highlights the importance of understanding the filter length and its impact on distortion, as well as the method used for calculating FIR coefficients. Participants were encouraged to share their own insights and work for more tailored assistance. Ultimately, the solution involves a simple adjustment to the signal timing. This approach minimizes distortion while maintaining the desired filter characteristics.
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hi.
in an FIR filter how do you remove the linear phase introduced by windowing?
also if the phase is non linear how can the distortion be minimized?
could someone please reply asap i badly need help with this. thanx
 
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Welcome to the PF. This sounds like homework, so I moved it from the general EE forum to the appropriate homework forum.

You need to show us a little more of your own work and thoughts in order for us to help you. For example, what effect does the length of the filter have on the distortions you are asking about? Why does length affect the distortions? What method are you using to calculate the FIR coefficients, and why use that method over others?
 
it's alright . i found the answer. apparently you just need to advance the signal before sending it through the filter. that way the delay of the filter cancels out with the advance and your signal ends up back at time zero.
 
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