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Dear all I am designing a 16FSK demodulator using DSK6711 and Goertzel Algorithm. The demodulator can detect correctly different frequencies when I use signal generator to generate different frequencies. However when I connect this demodulator to the modulator (using another DSK6711), my demodulator can't detect any frequency although my modulator generated the same frequencies which I used for testing with signal generator. I noticed that the sinewave from signal generator has a 0V mean value but signal from my modulator has around 4V mean value. Is this the problem ?? How can I move signal which I generated from the modulator down to 0V mean value. Thanks and best regards, Mai |
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Asking help for Goertzel Algorithm
Started by ●March 30, 2004
Reply by ●March 30, 20042004-03-30
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Mai, The simplest way I know to implement A FSK demod is following the algorithm detailed in this aplication note from Texas: spra347. I'm attaching the file now but I don't know if this group's settings permit us to attach files. If not, please go to http://www.dspvillage.com and look for the app note number. It doesn't use goertzel and I think it works very well. Thanks and good luck, Alexandre -----Original Message----- From: burin_burin [mailto:] Sent: Tuesday, March 30, 2004 12:55 PM To: Subject: [c6x] Asking help for Goertzel Algorithm Dear all I am designing a 16FSK demodulator using DSK6711 and Goertzel Algorithm. The demodulator can detect correctly different frequencies when I use signal generator to generate different frequencies. However when I connect this demodulator to the modulator (using another DSK6711), my demodulator can't detect any frequency although my modulator generated the same frequencies which I used for testing with signal generator. I noticed that the sinewave from signal generator has a 0V mean value but signal from my modulator has around 4V mean value. Is this the problem ?? How can I move signal which I generated from the modulator down to 0V mean value. Thanks and best regards, Mai _____________________________________ 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/c6x Other Groups: http://www.dsprelated.com Yahoo! Groups Links | |||
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