anti jamming receiver ajx airborn
anti jamming receiver ajx airborn

KV-AJx-A Airborne RAJA
Multi band Anti-Jamming Receiver

Category:
  • NavIC L1, L5, S-band support
  • Multi-band anti-jamming GNSS receiver: up to 3 frequency bands simultaneously (consider specified options)
  • Multi-system solution: NavIC (IRNSS) / GPS / Galileo / GLONASS/ BeiDou can be used (consider specified options)
  • Up to 100 dB J/S performance
  • Low power consumption: 5…8 W (depending on options)
  • Support of up to 3 jammers simultaneously for each of frequency bands
  • Receiver based on own NTLab’s high-performance ASICs: RFFE, baseband, anti-jamming processors
  • Up-converter RF output for external GNSS receivers
  • Internal receiver with INS, RAW data and with velocity, acceleration option by request

 

The purpose of using the KV-AJx-A RAJA GNSS receiver is to ensure stable reception of the navigation signal, including S-band signal, in conditions of staged interference. The receiver must be used with KV-AJAx phased antenna array (see the antenna array description page). The MIL-STD rugged enclosure is designed to work at the harsh environment and to meet EMI/EMC requirements.

Coupled with the use of a multi-band 4-element antenna array (the module can be provided by Kosminis Vytis), the tri-band solution allows to suppress interferences in up to 3 directions on 3 frequency plans simultaneously. This approach provides significantly higher protection against interference compared to single-frequency options. KV-AJx-A RAJA receiver contains a MEMS inertial sensor and thus allows the creation the GNSS-aided INS (GNSS+INS) solutions for position, velocity, time, and attitude. The jamming-free cleared RF signal can also be delivered to external non-protected GNSS receivers to obtain position, velocity, and time.

 

Parameter Description Note
Supported GNSS constellations Option 1:

GPS L1(C/A),L5; NavIC L5,S;

Galileo E1; SBAS L1

Option 2:

GPS L1(C/A), L2(CM), L5;

GLONASS L1(C/A), L2(C/A);

Galileo E1B, E1C, E5b; NavIC L5

Option 3:

GPS L1(C/A),L2(CM); Beidou B1; Galileo E1;SBAS L1

Option 4:

GPS L1, L2 (C/A, M-code);

Galileo E1

  

Simultaneous GNSS signal reception

 

Option 1 by default.

All other constellations available by request

 

C/A, CM codes: PVT digital out and interference-clear RF out

 

M-code: – RF output only, hardware ready (not tested).

 
Interference rejection:
Single jammer interference resistance Up to 40* dB Single jammer:

– one CW signal centered at the 1575,42 МНz;

– one CW signal centered at the 1227,6 МНz;
Up to 30* dB Single jammer:

– one AWGN signal centered at the 1575,42 МНz and 40 MHz bandwidth;

– one AWGN signal centered at the 1227,6 МНz and 30 MHz bandwidth;
Several interference suppression (up to three) Up to 32* dB Each of jammer:

– one CW signal centered at the 1575,42 МНz;

– one CW signal centered at the 1227,6 МНz;
Up to 23* dB Each of jammer:

– one AWGN signal centered at the 1575,42 МНz and 40 MHz bandwidth;

– one AWGN signal centered at the 1227,6 МНz and 30 MHz bandwidth;
Interference resistance:
Single jammer interference resistance Up to 90 dB (J/S)
Several jammers interference resistance (up to three) Up to 82 dB (J/S)
Number of receiver channels 4  for each frequency band
Positioning accuracy (RMS):
-horizontal 2.1 m
-vertical 3.8 m
Data interfaces 3xRS422
Peripheral interfaces 1x1PPS out
Up-converter RF output (optional*) 1 pcs Clear GNSS signal. L1 band by default. Other bands by request.
GNSS+INS coupling (optional available by request*) with onboard MEMS sensor With external IMU via RS422 (optional available by request*)
Data protocols NMEA, NTL Binary
Data update rate:
Standalone mode 20 Hz PVT data
Raw ranging measurements 20 Hz
GNSS+INS mode 200 Hz PVT data
Operation conditions:
Altitude 18000 m up to 50000 m by request
Velocity 512 m/s up to 3000 m/s by request
Supply voltage 12V…36V, 24V typical
Power consumption <15.0W (typical) max <19W (with three bands up-converter)
Dimensions 210.5 mm х 160 mm x 52 mm
Weight <2000 g
Operating temperature – 40°C …+ 71°C
Storage temperature – 45°C … + 85°C
Environmental According to MIL-STD 810G 514.6, 501.5, 502.5, 500.5, 516.6, 510.5, 503.5, 516.6, 513.6, 507.5, 509.5, 504.1
Connectors 4xSMA Female  (L1, E1)

4xSMA Female  (L2)

 

 RF IN+DC Antenna Out
1xSMA Female (L1, E1, L2) RF OUT
D38999/21NA98PN (Amphenol Aerospace)

Circular MIL Spec Connector HERMETIC

 Power
D38999/21YC35PN (Amphenol Aerospace)

Circular MIL Spec Connector HERMETIC

 Data
EMC / EMI According to MIL-STD 461G CE101, CE102, CE106, CS101, CS106, CS114, CS115, CS116, RE101, RE102, RS101, RS103

 

* – TBC

The actual product may differ in appearance

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