veyepar: Open Source Two Way Radio

Author(s):	David Rowe
Location	D2.211
Date	feb Fri 05	Days Raw Files
Start	14:15	First Raw Start	14:03
Duration	0:45:00	Offset	0:11:46
End	15:00	Last Raw End	14:59
Chapters	00:00 0:27:19
Total cuts_time	43 min.

https://linux.conf.au/schedule/30097/view_talk
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Description:	This talk will describe how an open source codec, modem, and open hardware can be used to improve two way VHF radio by a factor of 10. Push to talk two way radio is commonly used for police, emergency services, and the construction industry, with a world wide market of 50 million units/year. It can be used with or without base stations, and has a range of 10s of km. Several two way digital radio systems exist and are in common use today, however these are hobbled by the use of closed source codecs, which add significantly to the radio costs, and prohibit experimentation. There is frustration throughout the radio industry with closed source codecs. A team of open source developers has been working on open two way radio systems. The team has demonstrated a performance increase of a factor of 10, which can be used in a variety of ways: Transmit power can be reduced Battery life can be extended Relatively high bit rate digital data can be sent High quality speech, or variable rate speech coding and quality The range of the radios can be extended The cost of the radio hardware can be greatly reduced due to low power, simple hardware, smaller batteries, and no codec license fees. The use of Software Defined Radio (SDR) hardware is bringing the price of the hardware down, and open software is improving the functionality and performance. The new, open two way radio protocol requires a new, open hardware radio design. Fortunately, this can be relative simple, as most of the signal processing can be done in software. markdown
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