> > BTW a lot of GPS receivers don't have a "first LO".. they are more like a >> Tuned RF receiver - an input BPF for L1, L2, or L5, then direct sampling at >> around 30-40 MHz - something that makes the GPS signals alias down >> somewhere convenient (and always have positive frequency offset from zero, >> even at max negative Doppler) > > True. I've been wanting to try this with an FPGA transceiver; even the cheap ones go to 6 Gb/s now, but binary only. The newest transceivers support PAM-4, which would be great, but they're not affordable yet. Also that's a lot of gain at one frequency.
Cheers, Peter _______________________________________________ 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.
