| Please explain the purpose of operation: |
To facilitate this test event, we request authorization to operate on one or more of the following frequency band(s): 2.8 GHz, 3.2 GHz, and/or 3.9 GHz with 480 MHz bandwidth at EIRP levels of up to 30 dBm and an emission designator of 500MD7W. Our prototype radio supports a frequency range of 2.8 GHz to 5.5 GHz with 25 MHz channelization if a different frequency band is available, and dynamic power control is employed to use the minimum transmit power to close the link to maintain Low Probability of Detection (LPD) characteristics. The waveform used is a custom spread spectrum waveform, using techniques similar to Direct Sequence Spread Spectrum (DSSS) to spread a baseband signal over 480 MHz of bandwidth to provide a high data rate, LPD waveform capability.
The proposed test scenario consists of two Cryptic Vector prototype radios in a point-to-point link configuration. One radio will be ground-based in a fixed base station position. The second radio will be mounted to an Unmanned Aircraft System (UAS), a Tarot X6 commercial drone, flying within line-of-sight to the ground station. Radio communication will consist of command-and-control information to the airborne platform for waypoint and camera control commands as well as video streaming from the airborne platform to the base station. The radio link provides dynamic power control to limit the over-the-air transmission power to the minimum required to maintain the link and reduce observability. An “observer” station will be set up to monitor the frequency band and attempt to detect the over-the-air transmissions while the link is active. |