QM/PSK VOICE/DATA MODEM

Two Quadrature Modulation/Phase Shift Keyed (QM/PSK) Voice/Data Modem systems have been developed as part of the satellite communications hardware for advanced air traffic control systems. These systems consist of a modulator and demodulator unit which provides for the one-way communication of voice and/or data signals. The modulator and demodulator unit provides simultaneous transmission of analog voice and digital data signals multiplexed on a single carrier, using quadrature modulation techniques. The modem interfaces with the transmitter/receiver at 70 MHz intermediate frequency. The report contains design theory, circuit descriptions, diagrams, calibration procedures, and laboratory test results. (Author)

• Corporate Authors:

  Bell Aerospace Company

  Buffalo, NY  United States 
• Authors:
  • Lerner, T
  • McChesney, J
• Publication Date: 1976-3

Media Info

• Pagination: 97 p.

Subject/Index Terms

• TRT Terms: Air traffic control; Analog computers; Communications satellites; Data communications; Digital computers; L band; Modems; Modulation; Multiplexing; Phase shift; Phase transitions; Satellite communication; Speech; Transceivers; Voice communication
• Uncontrolled Terms: Data links
• Old TRIS Terms: Analog systems; Digital systems; Modulators; Phase shift keyers
• Subject Areas: Operations and Traffic Management; Safety and Human Factors;

Filing Info

• Accession Number: 00133379
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: FAA-RD-76-63
• Contract Numbers: DOT-TSC-631
• Files: NTIS
• Created Date: Jul 13 2002 12:00AM