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D-STAR
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Im Folgenden Informationen zu D-STAR:
(Für eine vergrößerte Version bitte aufs Bild klicken.)

 

 

Folie 1

D-STAR is a multi-media communications system that utilizes Amateur radio data and voice communications that have been digitalized, for the purpose of communication.

Folie 2

D-STAR, the result of the development by the Japanese Amateur Radio League (JARL) of the combination of data and voice communications, is a complete digital communications system connected by a backbone relay that connects the respective repeater sites.
This is an open system that anyone can participate in and use to communicate with. Also, as this is Amateur radio, there is no special encryption preventing use of or communication on the system.

Folie 3

D-STAR has been made according to the concepts listed below, to best match the needs for Amateur radio.

  • The terminal is not heavily restricted by the system
    A system like a cellular phone where if immediate registration is not made, the phone cannot be used, is not suitable for D-STAR. Other than the necessary components required for communication, the condition where frequencies etc. can be freely chosen is left unchanged.
  • Compatibility with the Internet
    In a world where the Internet is now a daily necessity in any country around the world, it is convenient for Amateur radio to have compatibility with the Internet. The application sources available for use are numerous, and data communication protocol is the same as that of the Internet, TCP/IP.
  • Necessity for user’s to be able to make by themselves
    As this is an Amateur radio system, it is not suitable for the system to be able to be made only by a manufacturer’s Engineers. It is necessary for general user’s with a certain amount of electrical knowledge, to be able to make it also.
  • Operation as a single system with sequential expansion possible via infrastructure maintenance
    A system like a cellular phone where the system does not work unless the infrastructure is complete is not suitable for Amateur radio. It is necessary that the system can operate with only one data repeater, and that the system can be expanded as required anytime after that.
  • Necessity for communication with existing analog systems
    It is not suitable to have just a new digital communication system, but it is also necessary to be able to use existing analog systems via an appropriate interface. In principal, this form of operation has been tested and confirmed.

Folie 4

The D-STAR system can utilize 128kbps high-speed data communication and 8kbps digital voice communication, and direct communication with the other station is possible via communication through the respective data and voice repeaters.
Data communication is relayed by the alternation between transmit and receive (simplex), and voice communication is relayed in the same way as existing analog FM, by semi-duplex.
In D-STAR, there is a broadband backbone that links the respective repeater sites, and it is possible to send the data and voice communication signals by multiplexing. Because of this, it is possible to communicate digitally with another station in a different area.
I.e. Communication between stations in separate repeater areas is possible.

Folie 5

It is possible to communicate with another station by digital data communication via a digital data repeater. As mentioned earlier, data communication is carried out using the same TCP/IP protocol as the Internet.
In actuality, the digital transceiver ID-1 is connected to a computer via its 10 Base-T connecter, and communication is carried out using the TCP/IP protocol of the computer. Therefore, it is possible to be able to communicate the same images, text, and voice etc. that is handled on the Internet.
Naturally, direct communication with another station is possible without being relayed through the repeater.



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