The D-STAR voice and low-speed data signal offers a significant improvement in spectrum efficiency. Other information can be enabled as required and could include the GPS location, etc. Typically the data capability is used for sending identifiers and similar useful information - for example pressing the PTT will normally trigger the sending of the callsign via the data capability. Of the available 1200 bps, around 900 bps is available for the transmission of data. Slow speed digital voice and data are transported at 4800 bps, of which 3600 bps is used for voice transmission, the remaining 1200 bps is used for synchronisation and general use.
The data may be either what is termed high or slow speed. Read more about MSK Minimum Shift Keying Modulation.ĭ-STAR enables users to connect via both digital voice data communications. With MSK there are no phase discontinuities and this significantly reduces the bandwidth needed over other forms of phase and frequency shift keying. Minimum shift keying, MSK offers advantages in terms of spectral efficiency when compared to other similar modes. This provides a robust and spectrum efficient form of data transmission. D-STAR basicsĭ-STAR uses a data transmission based around the use of a modulation format called minimum shift keying, MSK. Originally developed in the late 1990s by the Japan Amateur Radio League, D-STAR has been adopted by a number of manufacturers and there are not only simplex transmissions, but repeaters are also equipped for D-STAR communications. D-STAR stands for Digital Smart Technology for Amateur Radio and it is an open Amateur Radio standard for digital communications.Īlthough D-STAR is able to provide both data and voice communications, D-STAR is used primarily for voice, but the addition of data can provide some useful features. Ham radio voice modes Amplitude modulation Frequency modulation Single sideband Digital voice summary D-STARĭ-STAR is a form of digital communications used for amateur radio. What is D-STAR: ham radio digital voice D-STAR is a form of transmission used to provide rich featured digital voice for amateur radio.
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