DIGITAL SAT SIGNALLING
Original Publication Date: 1987-Oct-01
Included in the Prior Art Database: 2001-Oct-24
The following is a description of a method for providing continuous signalling over cellular radio-telephone voice channels. The current U.S. cellular system blanks the audio for 100 msec to send 10K bibsec data messages. Increasing the capacity by splitting the channels would require the data rate to be reduced. This increases the blank time and places more of the data transmission spectrum in the audio band. Therefore, continuous signalling provides a fundamental advantage in the quest for improved spectrum efficiency.