> Basically I have a radio circuit that is outputing audio data. I have setup a system to sample it all in, but that there is where I get stuck. I wish to decode it again into a bit stream. At first I used a data slicer but that proved very susceptable to interference, hence my wish for some psudo DSP. If it`s any use the modulation is basically just on and off ASK. I think some intereference is coming in and tipping the comparator over the edge so it detects a change. I was hoping DSP could average or something?? I am sure there is a well defined algo for this.



You should post more info abour the modulation of the bitstream, and about the receiver
you made.

Maybe you just have a DC offset problem. Make sure that the comparator treshold is not
at a fixed voltage (eg GND) but relative to the signal.  You can accomplish that
by connecting the signal directly to +, and via a series resistor of eg 10k to -
of the comparator. At the - pin, also connect a capacitor (eg 100nF) to GND.
This setup on the - pin works as a low-pass-filter and will make your receiver
independant of the DC offset.

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