• WORD ERROR PERFORMANCE OF VITERBI AND TAILBITING DECODERS

      King, M. A.; The Aerospace Corporation (International Foundation for Telemetering, 1981-10)
    • WWMCCS SPACE ASSETS; CONTRIBUTORS TO A TOTAL SYSTEM

      Coyle, James; The MITRE Corporation (International Foundation for Telemetering, 1981-10)
      This paper outlines the roles of satellite systems in the context of the overall WWMCCS mission. It describes the types of operational interdependencies that exist between ground elements and the satellites of space systems and proposes that, because of these interdependencies, equal consideration of the survivability of ground elements must be included in system planning in order to capitalize on the contribution of space assets to the WWMCCS mission.
    • ZERO OVERHEAD PCM SYNC

      Veillard, Dominique H.; Spin Physics, Inc. (International Foundation for Telemetering, 1981-10)
      In the past decades, spectacular advances in the technologies related to signal processing have driven the cost effectiveness of digital systems to new levels of practicality, in spite of the theoretical complexity inherent in the process. The following is a description of a novel way of alleviating altogether one element of the complexity of a digital audio or video channel, thereby yielding code bandwidth reduction and recording medium economy as well as cost savings in the implementation of the electronic circuits. A prototype circuit operating according to this principle has been demonstrated to work satisfactorily while providing overall system simplification. The configuration of the new sync detector circuit lends itself well to implementation by integrated circuit techniques.