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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
