1. A transceiver, comprising: one or more integrated circuits including an R.F front end adapted for connection to an antenna, a pulse detector coupled to the R.F. front end and adapted for detecting received pulses intended for the transceiver, and a pulse coupled oscillator including a monotonically increasing state function that is concave downward, wherein the oscillator is adapted for receiving synchronizing pulses from the pulse detector and for causing a predetermined state increment in the state function in response to received synchronizing pulses.