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VITA 49: Difference between revisions

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The VITA Radio Transport standards encapsulate RF data. It emphasizes precise timestamps and rich signal information.
The VITA Radio Transport standards encapsulate RF data. It emphasizes precise timestamps and rich signal information, and seeks to be a common means of moving custom analog IC logic into COTS digital networks--a kind of virtual [[SDR]]. The [https://www.vita.com/Standards published standards] are not offered freely, save to VITA associates.
 
==Receipt==
* Context packet -- describes properties of the radio components and antenna
** DDC: tuning, bandwidth
** ADC: sample rate, triggering
** RF tuner: bandwidth, gain, phase lock
** Antenna: azimuth, angle, polarization, location, altitude, speed, heading
* Signal packet -- IF/digitized RF/baseband data, ID, timestamp, spectral survey
** supplied by the DDC
* VRT information stream combines Context and Signal packets
* Configuration remained ad hoc in VITA 49, added in VITA 49.2 as Control Packets
** Uses same fields as Context packets
** ACKed by controlled devices
** Can be used to interrogate device properties on demand
** Can program simple loops and event triggers
** Very similar to [[CAN bus|CAN]] in these regards
 
===Context descriptors===
* 1-D Pointing Angle, ADC Sample Rate, Bandwidth, Frequency, GPS Coordinates, Velocity Vector, Power or Gain Settings, Reference Point, Timestamp, System Latency, 2-D Pointing Angle, Antenna Beamwidth, Noise Figure, Phase, Polarization, Relative Time Stamp, Scan Control, SNR, Waveform Type
 
==Transmission==
* Signal packets containing waveform and time schedule
*

Latest revision as of 13:40, 2 July 2020

The VITA Radio Transport standards encapsulate RF data. It emphasizes precise timestamps and rich signal information, and seeks to be a common means of moving custom analog IC logic into COTS digital networks--a kind of virtual SDR. The published standards are not offered freely, save to VITA associates.

Receipt

  • Context packet -- describes properties of the radio components and antenna
    • DDC: tuning, bandwidth
    • ADC: sample rate, triggering
    • RF tuner: bandwidth, gain, phase lock
    • Antenna: azimuth, angle, polarization, location, altitude, speed, heading
  • Signal packet -- IF/digitized RF/baseband data, ID, timestamp, spectral survey
    • supplied by the DDC
  • VRT information stream combines Context and Signal packets
  • Configuration remained ad hoc in VITA 49, added in VITA 49.2 as Control Packets
    • Uses same fields as Context packets
    • ACKed by controlled devices
    • Can be used to interrogate device properties on demand
    • Can program simple loops and event triggers
    • Very similar to CAN in these regards

Context descriptors

  • 1-D Pointing Angle, ADC Sample Rate, Bandwidth, Frequency, GPS Coordinates, Velocity Vector, Power or Gain Settings, Reference Point, Timestamp, System Latency, 2-D Pointing Angle, Antenna Beamwidth, Noise Figure, Phase, Polarization, Relative Time Stamp, Scan Control, SNR, Waveform Type

Transmission

  • Signal packets containing waveform and time schedule