• DocumentCode
    1179561
  • Title

    Dgital HF Communication System for Long-Distance Air-to-Ground Communication

  • Author

    Otten, Klaus W.

  • Author_Institution
    Communication Research Laboratory of the Advanced Development Division, National Cash Register Company, Dayton, Ohio
  • Issue
    4
  • fYear
    1964
  • Firstpage
    285
  • Lastpage
    291
  • Abstract
    Design characteristics and test results of an HF digital communication system for long-distance (several thousand miles) air-to-ground communication are described. The system was designed to operate reliably under adverse (multiple) propagation conditions by applying frequency and time diversity in form of quantized frequency modulation (QFM). Comparative tests with an audio-frequency-shift keying (AFSK) system under equal conditions show significantly better performance for the QFM system.
  • Keywords
    Delay effects; Digital communication; Distortion; Earth; Fading; Frequency diversity; Frequency modulation; Ionosphere; Reflection; System testing;
  • fLanguage
    English
  • Journal_Title
    Aerospace and Navigational Electronics, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0096-1957
  • Type

    jour

  • DOI
    10.1109/TANE.1964.4502213
  • Filename
    4502213
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1179561