A multi-channel interior communication system utilizing time multiplexing
Kellem, Carl William
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The development of a multi-channel interior communication system utilizing a single wire as a transmission line was undertaken in this paper. The principle of time multiplexing was used incorporating the Pulse Amplitude scheme of modulation. Synchronization was accomplished by continuously transmitting a synchronization pulse from one "Master" station to all other "Slave" stations. This system permits mutually exclusive conversations between any stations concurrently. A master station and one slave station were built and tested. Using a 10-kHz sampling frequency, a frequency response of from 100 Hz to 4.8 kHz was obtained. By using solid-state devices throughout, the size and weight of each station are minimized. This in conjunction with the need for only one connecting wire, make this system ideal for modern aircraft.
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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