# Filter Design Question

1. Aug 13, 2009

### blackout77

Does anyone know the steps to design/ calculations of bandpass filter, linear phase FIR with these specifications?
a). N= 23 (number of taps) Freq sample = 10kHZ, Freq low= 2.2kHz, Freq high = 3kHz

b). apply a 23 tap to blackman windowing?

Any additional such as the comparison of the two FI design would be helpful, thanks

2. Aug 13, 2009

### Staff: Mentor

What learning resources do you have available for this question? What textbook are you using for filter design? What have you done so far on these questions?

3. Aug 13, 2009

### blackout77

I am first computing the impulse sequence h(n) via the fourier transform method for bandpass filter. Then I multiply the fenerated FIR filter coefficients h(n) by the selected windows sequence of blackman windowing to obtain the hx(n), window impulse sequence. I delay the window impulse sequence hw(n) by M sample (N = 2M + 1) to get the causal windowed FIR filter coefficient ...

Is this correct?

4. Dec 22, 2009

### dsprao

use MATLAB, you can find functions for direct FIR designing using Remez Exchange Algorithm or using different Windows.