Today, most military platforms depend on Global Navigation Satellite Systems (GNSS). Jamming GNSS signals may cause many platforms to fail their mission. For this reason, the development of GNSS anti-jamming systems and sustaining the performance of the military platforms in jamming environments is a crucial need.
AGNOSIS Anti-Jamming GNSS includes CRPA antenna with 4 or 8 antenna array configuration and 1 signal processing unit with multi receive channels. Signals acquired by CRPA are digitized with high dynamic range receivers and processed by a signal processing unit. Jamming signals are filtered by using signal processing techniques, and the original signal without the jamming signal is reconstructed again to deliver standard GNSS receivers.
Meteksan Defence can develop and produce platform specific GNSS receiver systems with anti-jamming and anti-spoofing capabilities, which can output precise position and velocity information. In order to suppress jamming signals, spatial filtering methods are utilized. Phased array antennas are used for spatial filtering with respect to incoming signal direction, and jamming signals are separated from GNSS signals. Depending on the number of antennas used in spatial filtering, more than one jamming signal can be nullified. It is possible to determine the direction of the GNSS signals by using phased array antennas. By using this information, while powerful jamming signals are nullified by the anti-jamming system, GNSS spoofing signals can also be filtered.
Technical Requirements:
| AGNOSIS AJ-430-X/R-M | AGNOSIS AJ-430-X/R | AGNOSIS AJ-460-X | |
| Frequency | GPS L1&GALILEO E1&QZSS&BEIDOU B1C&SBAS, GLONASS L1, BEIDOU B1I (Simultaneously) | GPS L1&GALILEO E1&QZSS&BEIDOU B1C&SBAS, GLONASS L1, BEIDOU B1I (Simultaneously) | GPS L1&GALILEO E1&QZSS&BEIDOU B1C&SBAS, GLONASS L1, BEIDOU B1I, GPS L2, GLONASS L2, L Band Correction Services (Simultaneously) |
| Jamming Suppression | > 40 dB | > 40 dB | > 40 dB |
| GNSS receiver | Embedded Receiver Option GPS L1, GLONASS L1 | Embedded Receiver Option GPS L1, GLONASS L1 | Internal Receiver Option GPS L1&GALILEO E1&QZSS&BEIDOU B1C&SBAS, GLONASS L1, BEIDOU B1I, GPS L2, GLONASS L2 |
| Communication | Embedded Receiver Option GPS L1, GLONASS L1 RS 232 – 485, Ethernet | RS 232 - 485 | RS 232 – 485, Ethernet |
| Sizes | 75 x 70,5 x 24,5 mm | 135 x 90 x 16 mm | 150 x 150 x 24 mm |
| Weight | 300 ± 50 gr | 300 ± 50 gr | < 450 gr |
| Power | 28 V <15W | 5V, 28 V <15W | 28V <33W |
| Enviromental Conditions | MIL-STD-810G | MIL-STD-810G | MIL-STD-810G |
