# Help on Filters required

Started by November 10, 2001
 Greetings everyone, I am newbie in this group (and also just gotten the kit and being thrown in the deep end to figure the whole thing out myself) and hopes that some one can clear the path for me on filters. I have a question on implementing filters on the C5402 kit and i am wondering how to do it ? From some of the filter examples, I see that the filter coefficients are integer numbers while the coefficients that I have calculated (by hand and Matlab) are fractional numbers. Is it something to do with Q15 (quantized values) . How do I go around it ? Can anyone please explain how to calculate the proper methods of getting the filter coefficients ? Thanks Patrick Sebastian Univ. of Tech . PETRONAS
 To get Q15 out of fractional, multiply your fractional number by 32768 and round to the nearest integer. This will allow you to represent your fractional numbers as Q15 integers in the DSP (range is -1.0 <= x < 1.0). You can do this for all of your filter coefficients in Matlab. Good luck, Dave Helsley -----Original Message----- From: [mailto:] Sent: Saturday, November 10, 2001 7:26 AM To: Subject: [c54x] Help on Filters required Greetings everyone, I am newbie in this group (and also just gotten the kit and being thrown in the deep end to figure the whole thing out myself) and hopes that some one can clear the path for me on filters. I have a question on implementing filters on the C5402 kit and i am wondering how to do it ? From some of the filter examples, I see that the filter coefficients are integer numbers while the coefficients that I have calculated (by hand and Matlab) are fractional numbers. Is it something to do with Q15 (quantized values) . How do I go around it ? Can anyone please explain how to calculate the proper methods of getting the filter coefficients ? Thanks Patrick Sebastian Univ. of Tech . PETRONAS _____________________________________ Note: If you do a simple "reply" with your email client, only the author of this message will receive your answer. You need to do a "reply all" if you want your answer to be distributed to the entire group. _____________________________________ About this discussion group: To Join: Send an email to To Post: Send an email to To Leave: Send an email to Archives: http://www.yahoogroups.com/group/c54x Other Groups: http://www.dsprelated.com ">http://docs.yahoo.com/info/terms/