mcd
04-01-2005, 01:55 PM
Hi,
I'm urgently trying to get my head around methods for decoding an FS
encoded signal on my PC.
I have a .wav file of the transmitted data, and I want to get the dat
out.
I'm doing my work in Matlab/Simulink for now for simplicity.
So far I've tried:
- Goertzel algorithm as used for dtmf
- mag˛ of fft and peak detect
I've struggled with both of these techinques. With a 22kHz .wav source
don't have enough samples/bit for Goertzel and seemingly for the df
technique either. I have the mag˛ working at 50 baud but not at 10
(reqd).
So, I went back to the drawing board and searched again, this time on fs
decoding. I came up with:
- Matched filters and Cauchy-Schwarz inequality
- Soft PLL
Is there a standard way of decoding FSK please? If so can anybody offe
any tips on what it is/how to do it, a dummys guide as it were. I lik
the idea of the matched filter but I'm completely stuck when it comes t
implementing the Caucht-Schwarz inequality.
Any help would be very much appreciated...
Thanks,
Martin
This message was sent using the Comp.DSP web interface o
www.DSPRelated.com
I'm urgently trying to get my head around methods for decoding an FS
encoded signal on my PC.
I have a .wav file of the transmitted data, and I want to get the dat
out.
I'm doing my work in Matlab/Simulink for now for simplicity.
So far I've tried:
- Goertzel algorithm as used for dtmf
- mag˛ of fft and peak detect
I've struggled with both of these techinques. With a 22kHz .wav source
don't have enough samples/bit for Goertzel and seemingly for the df
technique either. I have the mag˛ working at 50 baud but not at 10
(reqd).
So, I went back to the drawing board and searched again, this time on fs
decoding. I came up with:
- Matched filters and Cauchy-Schwarz inequality
- Soft PLL
Is there a standard way of decoding FSK please? If so can anybody offe
any tips on what it is/how to do it, a dummys guide as it were. I lik
the idea of the matched filter but I'm completely stuck when it comes t
implementing the Caucht-Schwarz inequality.
Any help would be very much appreciated...
Thanks,
Martin
This message was sent using the Comp.DSP web interface o
www.DSPRelated.com