The main challenges that stand in the way of creating long-range communication systems are as follows:
Direct visibility between the aircraft and the ground control system can be achieved by increasing the aircraft flight altitude and increasing the elevation of the ground antenna. High-speed information transmission over distances greater than 300 km is possible using repeater equipment, satellite communication systems, or stationary information transmission systems.
Compensation for severe signal attenuation along the path can be accomplished via the following measures:
Many of the problems solved by modern onboard systems of unmanned aerial vehicles (UAVs) call for the availability of high-speed information transmission lines between the UAV and the ground control system (GCS). For example, the use of UAV technology for real-time monitoring or reconnaissance purposes involves working with raster images of different dpi that are to be received onboard from sensors operating in different wavelength ranges and delivered to the GCS. The technology that is most commonly used for information transmission today is to transmit image data continuously as it is received, in either digital or analog format whose structure does not change throughout the mission.
Name | Value |
---|---|
WORKING FREQUENCY RANGE | 2400–2483 MHz |
RECEIVE/TRANSMIT SPEED | 10–80 Mbps |
CHANNEL WIDTH | 5–40 MHz |
RANGE CAPABILITY | Up to 150 km (depending on the antennas used) |
MODULATION MODE | NMEA-0183, binary, proprietary |
GUARD INTERVAL LENGTH | 400, 800 ns |
SPECTRAL POWER PER BAND, NO LESS THAN | 2 x 2 W |
MAXIMUM TRANSMITTER POWER | 2 x 5 W |
RECEIVER SENSITIVITY | -96 dBm |
DIMENSIONS OF ONBOARD TRANSCEIVER MODULE | 145 x 65 x 22 mm |
WEIGHT OF ONBOARD TRANSCEIVER MODULE | 250 g |
WORKING TEMPERATURE RANGE | -30 °С...+70 °С |
MAXIMUM POWER CONSUMPTION OF ONBOARD TRANSCEIVER MODULE | 28 W |
AVERAGE POWER CONSUMPTION OF ONBOARD TRANSCEIVER MODULE * | 8 W |
SUPPLY VOLTAGE | 15...28 V |
* where required, the scope of delivery can be changed to include an electrically-controlled beam-scanning antenna array