Aug 1, 2010 #1 W watertreader Full Member level 3 Joined Dec 2, 2005 Messages 174 Helped 4 Reputation 8 Reaction score 0 Trophy points 1,296 Activity points 2,560 Hi, For a low frequency modulated signal.. about 1khz or so, would it be possible to directly read off the modulation via using fft on the collected signal? any additional preprocessing step or equipment is required? thanks
Hi, For a low frequency modulated signal.. about 1khz or so, would it be possible to directly read off the modulation via using fft on the collected signal? any additional preprocessing step or equipment is required? thanks
Aug 1, 2010 #2 P permute Advanced Member level 3 Joined Jul 16, 2010 Messages 918 Helped 295 Reputation 590 Reaction score 266 Trophy points 1,343 Activity points 8,543 demodulation via fft What exactly are you trying to do? certainly, a basic FFT will be able to demod low-rate signals. especially low-rate ASK/FSK signals, and even some PSK ones. but without timing/carrier recovery, or equalization, you will eventually run into limits.
demodulation via fft What exactly are you trying to do? certainly, a basic FFT will be able to demod low-rate signals. especially low-rate ASK/FSK signals, and even some PSK ones. but without timing/carrier recovery, or equalization, you will eventually run into limits.