• Home
  • Current congress
  • Public Website
  • My papers
  • root
  • browse
  • IAC-06
  • B3
  • 5
  • paper
  • Skyswitch: the conceptual design of the Chinese broadband multimedia communication satellite system

    Paper number

    IAC-06-B3.5.02

    Author

    Mr. Zhong Wen Yan, China Academy of Space Technology (CAST), China

    Year

    2006

    Abstract
    Broadband satellite communication is an important trend in the development of satellite communication today. Since the 1980’s, broadband multimedia satellite system experienced its fast expansion in the beginning, to its depression at the turn of the century, and its revitalization in recent years.
    
    Broadband multimedia communication satellite system is an advanced communication system that incorporates modern electronics technology, communication technology and network technology. It is an essential part of the entire communication network and a necessary supplement for terrestrial network. A communication system integrated with space and ground network will bring great conveniences to people.
    
    Judging from the history of the development of broadband satellite, one can see many new technical trends. In orbit selection, from the co-existence of MEO, LEO and GEO in early days to the preference of GEO orbit today; in frequency planning, from Ku band to Ka band; in antenna coverage, it is extended to multiple beams and combined beams; in transponder technology, from transparent transmission to regenerative and processed transmission; in satellite platform, to large scale, high power platform and high ‘payload/platform ratio’; in communication technology, to high efficiency modulation/demodulation, high coding gain and high performance error correction; in terminal application, from isolated terminal usage to unified scheduling and management by network management center. These technology advances help the broadband multimedia communication satellite system meet the market demand better, and provide more profits.
    
    The Skyswitch Project plans to use Ka band. It employs 11 communication antennas to form 32 beams and makes seamless coverage of Chinese territory. There are 5 different widths of beams according to the geographical and service demand in the service area. Satellite EIRP ranges from 53.5dBw to 65 dBw. 4-color frequency reuse scheme is adopted in the system and each frequency is reused 8 times. The highest uplink information rate of the terminal is 2.048Mbps and in the downlink the highest rate of terminal reception is as high as 100Mbps. The satellite processing rate is up to 3.4Gbps. In the uplink, the access method is MF-TDMA and in the downlink the signal is time division multiplexed. The transport, multiplex and switching architecture of system is ATM. The network architecture is IP over ATM.
    
    To meet the requirements of payload, DFH-4, the most powerful satellite platform in China today, will be used. Its RF output power is 3000~4000w.
    In this paper, we introduce the overall system architecture of the Skyswitch system and the technical scheme of its platform, payload and network management center.
    
    Abstract document

    IAC-06-B3.5.02.pdf

    Manuscript document

    IAC-06-B3.5.02.pdf (🔒 authorized access only).

    To get the manuscript, please contact IAF Secretariat.