Since 802.11g uses OFDM, I did a bit of reading about that modulation scheme as used in WiFi. OFDM is not spread spectrum, so there may be a way to do this. Now if I can find a datasheet on either the BCM5352 OR BCM5454 chips. So far, Google isn't turning up any datasheets.
Joe KA5ZEC On Sat, Jan 9, 2010 at 7:12 PM, Lux, Jim (337C) <[email protected]> wrote: > Not with an unmodified interface, however there are several ways to do it.. > > Lock the access point's local oscillator to your external reference. > When the receiver gets carrier lock and sync, its local oscillator is locked > to the AP's local osc which is locked to your ref. Use that to discipline > your local reference. > > Mind you the "receiver's local oscillator" is probably partly analog (an XO > driving a PLL for the RF front end) and partly digital (in the demodulator). > > If you're ambitious, I believe that someone has implemented > 802.11(something) for the Ettus USRP. > > You might start by just seeing how many oscillators there are in the access > point, and whether you can generate those from your external reference. If > you run ALL the clocks in the thing off the reference, you've got a fair > chance that any signal emitted will also be locked. > > > On 1/9/10 6:05 PM, "Joseph Gray" <[email protected]> wrote: > >> I'm thinking of repurposing some 802.11G WiFi routers for amateur >> radio. Sending NTP over WiFi should be usable, but is it possible to >> send a frequency reference over this type of link? Being spread >> spectrum and packetized, I don't see how. Please enlighten me if you >> know of a method. >> >> Joe >> KA5ZEC >> >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
