• The Architecture and Design of Parallel Processing for Real-Time Multiplexing Telemetry Data

      Jun, Zhang; Qishan, Zhang; Beijing University of Aeronautics and Astronautics (International Foundation for Telemetering, 1992-10)
      The parallel processing technology has been widely applied to many science and engineering technical fields, also to telemetry. In particular, telemetry develops towards the trend of large capacity, high rate, several data streams and programmable formats. This sets a still higher demand on processing for real-time multilexing telemetry data. On the basis of analyzing of the characteristics of telemetry data processing (TDP), the parallel processing conception and methods are adopted, countering multiiple-channel data streams of different objects, several architectures of parallel processing for real-time multiplexing telemetry data are presented. It makes better use of the concurrency during the process of TDP and handles the telemetry information effectively in every processing level of the whole telemetering information processing system. The paper shows the property comparison of these parallel processing architectures and main features too. Experiments have indicated that it is an economical and effective method to improve the performance of telemetry information processing system by using paralle processing architecture which is based on concurrency of telemetry data processing.
    • FIBER-OPTIC NETWORKS FOR TELEMETRY APPLICATIONS

      Zhang, Jian-Guo; Li, Zheng; Università degli Studi di Parma Viale delle Scienze; Beijing University of Aeronautics and Astronautics (International Foundation for Telemetering, 1992-10)
      In this paper, we investigate high-capacity fiber-optic networks for real-time telemetry applications. The network topologies and related network components are analyzed for telemetry fiber-optic Local Area Network (LAN) and Metropolitan Area Network (MAN) as well as MAN internetworking with LANs. Two types of multiplexing techniques, namely, Wavelength Division Multiplexing and Time Division Multiplexing, are proposed to support real-time high-capacity telemetry applications, and the perspective of such networks is also considered. Finally, the optical modulation technique and the choice of optical devices are discussed, which are based on improving the reliability of fiber-optic LANs and MANs.
    • A High Performance MIL-STD-1773 Data Bus

      Zheng, Li; Yu-De, Ni; Jian-Guo, Zhang; Beijing University of Aeronautics and Astronautics; Civil Aviation Institute of China; University of Parma (International Foundation for Telemetering, 1992-10)
      This paper gives detailed ideas and methods about the design and development of high performance MIL-STD-1773 airborne fiber optic data bus. To reject impulsive interference efficaciously, the large core and large numerical aperture fiber optics are adopted, as well as high- emitted power LEDs and a low noise optical receiver structure to get high signal-to-noise ratio at decision time. Two new modulation technique----digital frequency shift keying and partial tri-level Manchester are recommended, which are very attractive in the design of modern optical bus. Meanwhile, VLSI chips COM1553B are used to construct bus control interface unit, thus many advantages have been brought out.