Accession Number:

AD0920281

Title:

Expanded Intercom Multiplex Study.

Descriptive Note:

Final technical rept. 29 Jun 72-30 Apr 73,

Corporate Author:

HUGHES AIRCRAFT CO EL SEGUNDO CALIF SPACE AND COMMUNICATIONS GROUP

Personal Author(s):

• Julian,Richard L.
• Kosco,Thomas J.
• Schaefler,Norman W.

Report Date:

1974-06-01

Pagination or Media Count:

94.0

Abstract:

Means of utilizing multiplexing technology in the interior communication systems of large military aircraft were studied. Candidate system approaches included Time division multiplexing TDM of digitized audio samples onto a common distribution cable to subscriber stations frequency division multiplexing FDM of audio onto a common distribution cable in a phase synchronous single sideband suppressed carrier SSBSC system and digital TDM control of a centralized switching matrix which performs all audio switching and mixing as in the ANAIC-27 airborne interphone system. These approaches were compared using the audio distribution system of the Airborne Warning and Control System AWACS as a model requirements set. The ANAIC-27 approach was found to be clearly superior because of its low complexity and its ability to provide secure communications. A system for the AWACS requirements utilizing this approach was configured in detail and is described. Author

Descriptors:

• *MULTIPLEXING
• *VOICE COMMUNICATIONS
• AIRBORNE EARLY WARNING
• AIRCRAFT
• TIME DIVISION MULTIPLEXING
• MIXERS(ELECTRONICS)

Subject Categories:

• Patrol and Reconnaissance Aircraft
• Voice Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE