Jim wrote: a square wave, >> multiplied by itself, has the same output as input. > > Oh... I was assuming you had the two quadrature square waves (which are > just like the saturated LO for the mixer in RF land)
You don't have two square waves in quadrature. You have the (amplified) signal from the antenna. >> A Costas Loop recovers the bit stream and the carrier frequency (from >> the local VCO) from a BPSK. It is self syncronizing. > > > Yes.. but if you don't care about the bitstream, and you want simpler > hardware, squaring works. (especially if the modulator doesn't have good > carrier suppression) I think a better implementation would be: Analog multiplier Adaptive comparator (slice level = 1/2 P_P signal) Flip Flop Rabbit ears filter at 60 kHz -John ============= > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
