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ArthurDent's avatar
ArthurDent
Icon for New Contributor rankNew Contributor
6 years ago

FIR Filter II, not able to get unity gain

Hi I have designed a 26 taps FIR filter in Matlab. The coefficients are float (between -1 to 1) and the sum of the coefficient is close to 1 ( sum(taps) = 0.9991 ). In FIR II IP generator (Quartu...
CheepinC_altera's avatar
CheepinC_altera
Icon for Regular Contributor rankRegular Contributor
6 years ago

Hi AD,

As I understand it, you seems to have some inquiries related to design implementation. Generally we would use this Forum to address specific inquiry related to FPGA but not design implementation. However, I will try my best to assist to my best knowledge. Hope you could understand it.

As I understand it, you are trying to design a FIR with unity gain. Just would like to check with you if you are able to get a FIR running with unity gain in Matlab? You might need a filter work in Matlab before we could continue to port over to FPGA.

As I search through the web, I come across a post in the following link related to scaling required. Probably you could take a look to see if it is helpful.

https://www.mathworks.com/matlabcentral/answers/89435-normalization-of-a-given-filter-to-have-unity-gain-at-dc

Please let me know if there is any concern. Thank you.

Best regards,

Chee Pin