LAND MOBILE VOICE PRIVACY COMMUNICATIONS

The need for voice security in Land Mobile Radio communications is addressed, followed by a discussion of the thinking and engineering behind Motorola's development of a digital voice scrambler, the Digital Voice Protection (DVP) System. The radio hardware developed for the scrambler system is also described. Key technological advancements in realizing the DVP System were in the areas of large-scale integration (LSI)/hybrid technology and binary digital voice processing techniques. The DVP System utilizes 12,000 bit/sec. Continuously Variable Slope Delta modulation, a proprietary custom LSI CMOS (complementary metal oxide semiconductor) encryption device, and binary frequency shift keying for coded mode radio frequency transmission modulation.

• Supplemental Notes:
  • Conference held in Dearborn, Michigan, 15-17 September 1980. published in HS-030 396 (IEEE-80CH1601-4; SAE-SP-90), "Convergence 80. IEEE Vehicular Technology Society Annual Conference (30th), International Conference on Transportation Electronics Proceedings," Utica, Michigan, 1980.
• Corporate Authors:

  Institute of Electrical and Electronics Engineers (IEEE)

  Operations Center, 445 Hoes Lane, P.O. Box 1331
  Piscataway, NJ  United States  08855-1331

  Society of Automotive Engineers (SAE)

  400 Commonwealth Drive
  Warrendale, PA  United States  15096
• Authors:
  • Hennen, H A
  • Mulford, K
• Publication Date: 1980

Media Info

• Features: References;
• Pagination: 8 p.

Subject/Index Terms

• TRT Terms: Digital computers; Mobile communication systems; Mobile radio; Privacy; Radio; Radio equipment; Speech; Speech recognition; Voice communication
• Uncontrolled Terms: Scramblers (Telecommunications)
• Old TRIS Terms: Digital systems; Voice security
• Subject Areas: Safety and Human Factors;

Filing Info

• Accession Number: 00382061
• Record Type: Publication
• Source Agency: National Highway Traffic Safety Administration
• Report/Paper Numbers: IEEE-80CH1601-4, HS-030 470, SAE-SP-90
• Files: HSL, USDOT
• Created Date: Mar 30 1984 12:00AM