Thread View: comp.sys.next.programmer
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Started by charles d. kincaid
Wed, 27 Jan 1993 22:10
DSP questions
Author: charles d. kincaid
Date: Wed, 27 Jan 1993 22:10
Date: Wed, 27 Jan 1993 22:10
26 lines
1617 bytes
1617 bytes
Hello, I am trying to do a convolution between a data array and a filter. I am looking into using the DSP for this (hey, it's there! why not!). However, I am having some problems getting into the right mindset. If some very kind person can help I would appreciate it very much. This is a small part of my work for my dissertation and it's bogging me down. First, the DL documentation says that when two vectors are multiplied the range of the data must be between -1 and 1. Does it matter how this is done? Can I just subtract the minimum and then divide by the range to get into -1 to 1? Then after the fft do I just multiply and add to get the right answer? I am using the fft.c code in the DSP folder of the Examples. It does an FFT, but not an inverse FFT. Can the inverse FFT be calculated using DSPAPfftr2a? As you can see, I am new to Fourier transforms. That may be part of my problem. I originally intended to use the Numerical Recipes in C book, but their method isn't working properly. Any help is greatly appreciated. Sincerely, charles d. kincaid statman@stat.ufl.edu ------------------------------------------------------------------------------ Dept. of Statistics \_ \_ \_\_\_\_\_ 'Damn fine coffee...and hot, too!'
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