Hi everybody, Low-pass filter design is considered trivial and Matlab makes it even easier, but I would like some advice in this situation. I would like a low-pass filter with attenuation in the transition band of 30 dB. the transition band should be 5% of the cut-off frequency. But the big problem is that I have a time constraint that prevents me from using a filter of order more than 10. I know it is almost impossible to achieve these condition. But I would like some advice. I can relax a little in the transition band up to 10%. I would like also to know which kind of filter is better if you consider a flat pass-band as a desired feature. Thanks in advance, Hugo |