Article View: comp.dsp
Article #1221Impulse Response Filter Coeffs Needed
From: David B. Chorlian
Date: Sat, 14 Nov 1992 01:47
Date: Sat, 14 Nov 1992 01:47
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1831 bytes
I am trying to construct a 1024 point high pass FIR filter using the IEEE Digital Signal Processing program eqfir.f. I was successful in constructing 256 point filters, but although I enlarged the array sizes to accomodate contructing 1024 point filters, the program failed to converge and then crashed with a segmentation fault. Not being a FORTRAN programmer and being in somewhat of a hurry, I appeal to someone on the net to supply me with the coefficients for a high-pass filter with the cutoff point at 2Hz (1024pts = 1 sec). Or, if someone has a better idea for accomplishing the same goal, I'd appreciate the advice. The coefficients are used for digital filtering using an fft of the signal, an fft of the coefficients, their convolution (since the coefficients are symmetric around the center of the array, a simple term by term multiplication is fine), and an inverse fft to get the filtered signal. If you have or can easily generate the coefficients, please email them to me. If you have other ideas, use your judgment on posting. This project involves the processing of EEG data. If you want to know more about it, email and I will give you the details. David B. Chorlian Neurodynamics Lab SUNY/HSCB davidc@panix.com -- David B. Chorlian Neurodynamics Lab SUNY/HSCB davidc@panix.com
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arc1-ca.pugleaf.net!sparky!uunet!charon.amdahl.com!pacbell.com!sgiblab!zaphod.mps.ohio-state.edu!cis.ohio-state.edu!rutgers!cmcl2!panix!davidcShow Full Headers
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Path: arc1-ca.pugleaf.net!sparky!uunet!charon.amdahl.com!pacbell.com!sgiblab!zaphod.mps.ohio-state.edu!cis.ohio-state.edu!rutgers!cmcl2!panix!davidc From: davidc@panix.com (David B. Chorlian) Newsgroups: comp.dsp Subject: Impulse Response Filter Coeffs Needed Summary: Impulse Response Coeffs needed for 1024 point high pass FIR filter Keywords: Filter, FIR, IEEE, FFT Message-ID: <1992Nov14.014758.11680@panix.com> Date: 14 Nov 92 01:47:58 GMT Organization: PANIX Public Access Unix, NYC Lines: 29