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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, and seeks to be a common means of moving custom analog IC logic into COTS digital networks--a kind of virtual [[SDR]]
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]]


==Types==
==Receipt==
* Context packet -- describes properties of the radio components and antenna
* Context packet -- describes properties of the radio components and antenna
** DDC: tuning, bandwidth
** DDC: tuning, bandwidth
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** RF tuner: bandwidth, gain, phase lock
** RF tuner: bandwidth, gain, phase lock
** Antenna: azimuth, angle, polarization, location, altitude, speed, heading
** Antenna: azimuth, angle, polarization, location, altitude, speed, heading
* Signal packet -- IF data, ID, timestamp, supplied by the DDC
* Signal packet -- IF/digitized RF/baseband data, ID, timestamp, spectral survey
** supplied by the DDC
* VRT information stream combines Context and Signal packets
* VRT information stream combines Context and Signal packets
* Configuration remains ad hoc
* 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
*

Revision as of 11:56, 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

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