PULSE CODE MODULATION

THE CAPABILITY IS EXAMINED OF A HIGHWAYS COMMUNICATION AND CONTROL SYSTEM UTILIZING PULSE CODE MODULATION TECHNIQUE. THE PULSE CODE MODULATION (PCM) TECHNIQUE REFERS TO THE CONVERSION OF THE ALPHANUMERIC INFORMATION INTO A BINARY FORM SO THAT THE INFORMATION CAN BE REPRESENTED BY A SERIES OF PULSES, EACH PULSE EXHIBITING ONE OF TWO POSSIBLE LEVELS- A BINARY 1 OR A BINARY 0. THESE PULSES ARE REFERRED TO AS DATA BITS OR SIMPLY BITS. THE PULSE DURATION MODULATION TECHNIQUE DEPENDS ON MODULATING OR VARYING THE RELATIVE WIDTHS OF A SERIES OF PULSES IN A MANNER REPRESENTING THE INFORMATION TO BE PROCESSED OR TRANSMITTED. THE PCM TECHNIQUE APPEARS TO BE OPTIMUM BECAUSE OF: EFFICIENCY, IMMUNITY TO NOISE AND DISTORTION, IMPLEMENTATION, AND COMPATIBILITY. A PCM COMMUNICATIONS SYSTEM CAN BE IMPLEMENTED IN A MANNER PERMITTING ECONOMICAL EXPANSION. THE BASIC ITEMS OF EQUIPMENT CAN BE DESIGNED IN A MANNER THAT WILL PREVENT PREMATURE OBSOLESCENCE BY INCORPORATING PULSE CODE PARAMETERS SEVERAL ORDERS OF MAGNITUDE IN EXCESS OF THE CURRENT REQUIREMENTS. THE PULSE CODE TECHINQUE WILL PROVIDE THIS TYPE OF EXPANSION CAPABILITY, WITHOUT THE PENALTY OF EXCESSIVE COST, COMPLEXITY, AND PHYSICAL SIZE NORMALLY ASSOCIATED WITH SYSTEMS EQUIPMENT EMPLOYING OTHER LESS- EFFICIENT DATA TECHNIQUES.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrr/1968/219/219-007.pdf
• Supplemental Notes:
  • Paper sponsored by Committee on Electronic Research in the Highway Field and presented at the 47th Annual Meeting. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Tuck, Winfree P
• Publication Date: 1968

Media Info

• Media Type: Digital/other
• Features: Figures;
• Pagination: pp 46-51
• Monograph Title: Highway communications
• Serial:
  • Highway Research Record
  • Issue Number: 219
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Communication systems; Economics; Highways; Pulse code modulation
• Old TRIS Terms: Binary digits
• Subject Areas: Economics; Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00225251
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Aug 28 1994 12:00AM