EFFICIENT USE OF NARROWBAND RADIO CHANNELS FOR MOBILE DIGITAL COMMUNICATIONS

Data communications systems linking field equipment such as traffic sensors, changeable message signs and incident response vehicles with traffic operations centers are a fundamental requirement of Federal Highway Administration (FHWA) plans for deployment of Intelligent Transportation System (ITS) traffic management and traveler information services. The FHWA has received an allocation of five channels in the 220 MHz band to provide a communications resource for ITS applications. High efficiency modems will be required to make maximum beneficial use of the ITS 220 MHz channels. This Innovations Deserving Exploratory Analysis (IDEA) project developed a wireless modem architecture that provides bandwidth efficient data communications in the 220 MHz ITS spectral allocations. The goal was to provide greater than 12 kbps transmission capacity on the 4 kHz channels (3 bps/Hz spectral efficiency) for mobile applications. This work has resulted in a proof of concept of a general purpose resource for data communications in traffic management systems, traveler information systems, and/or commercial vehicle operations. The system was verified by a rigorous theoretical performance analysis, bench testing and indoor field testing. Field tests in mobile urban environments are planned.

  • Record URL:
  • Supplemental Notes:
    • This ITS-IDEA project was conducted by Purdue University, West Lafayette, Indiana.
  • Corporate Authors:

    Transportation Research Board

    500 Fifth Street, NW
    Washington, DC  United States  20001
  • Authors:
    • Fitz, M P
    • Krogmeier, J V
    • Grimm, J
    • Chen, T-A
    • Magnusen, T
    • Gansman, J
    • Kuo, W-Y
  • Publication Date: 1996-2-5

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00727278
  • Record Type: Publication
  • Contract Numbers: ITS-15
  • Files: NTL, TRIS, TRB
  • Created Date: Oct 15 1996 12:00AM