DStahl,

While Chen definitely states a lot of correct and straightforward info, he's hardly comprehensive enough on the general point since modulation is not at all necessary for signal transmission. One may simply stress the transmitter with a short "delta pulse" and record signal delay from the receiver, no time-consuming encoding is necessary; furthermore, since we need no more than one single bit to measure the transmission speed, his mention of delta-f/baud-rate issue can't apply. The original W/D scheme didn't provide for such a single-bit operation mode, while a simple mod can do that. Cheers!

<font size=-1>[ This Message was edited by: AgoraBasta on 2003-01-13 17:21 ]</font>