FIR filtering

[LabWINC]

Hi all,
i'm looking for a module to implement a digital FIR filter!
Can anyone help me?

Thanks,

Vincent

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Re: FIR filtering

[LabWINC]

It's for research work. I'm implementing an algorithm from a matlab
one.
It could be very difficult to find the fir coefficients because i have
lot of fileters to implement.

Vincent

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Re: FIR filtering

[LabWINC]

What's gnuradio?

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Re: FIR filtering

[LabWINC]

I can't understand how gnuradio can help me...
I find scipy is the only way to implement a good FIR.

Thanks,

Vincent

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Re: FIR filtering

[LabWINC]

Thank you too Georg

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Re: FIR filtering

[LabWINC]

I'm interested in finding coefficient and implementig the filter as
well.
John's post is what i need.

John Hunter wrote:
> help scipy.filter (see FIR filter design below)

How can i get the help like yours?

If i type help scipy.filter it give me an error

help scipy.filter
  File "", line 1
help scipy.filter
 ^
SyntaxError: invalid syntax



I'm sorry but i'm new of python,

Vincent

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Low Pass Hamming filter design

[LabWINC]

Hi all,
i have a question for all :-D

I would like to design and apply a FIR low pass filter with Hamming
window.
I'm using scipy module.

First I create the windows with the signal.firwin function and after i
apply this window to my signal with the signal.lfilter function.

I didn't understand where i can specify what kind of filter i'm
implementing (low, high or band pass).

Thanks all,

Vincenzo

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Re: Low Pass Hamming filter design

[LabWINC]

Is there someone that can help me?



please


Vincenzo

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How can i design a band-pass filter with scipy?

[LabWINC]

Hi all,
i would like to design a high pass filter with scipy.signal module.

This is the code i'm using to:

import scipy.signal as signal
import scipy

#first of all i design the lowpass fir filter. This is a 10 taps filter
with cutoff frequency =1 (as help tell me to do)

lpwindow=signal.firwin(10,1)

#with the following instruction i'm creating a band pass filter from
the low pass one
bpwindow=signal.lp2bp(lpwindow,1,0.5,0.2)

My problem is that the band-pass filter obtained with lp2bp function is
16 taps one!
How is it possible??

thanks,

Vincenzo

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