Unmanned aerial vehicle communication method and device and unmanned aerial vehicle

An unmanned aerial vehicle (UAV) communication device, comprising a processor and a memory which are communicatively connected via an internal bus, wherein the memory stores a computer program executable by the processor, and when the computer program is executed by the processor, the following steps are carried out:

• acquiring position information of the UAV and position information of a ground station, wherein the ground station and the UAV are communicated wirelessly;
• determining a distance between the UAV and the ground station according to the position information of the UAV and the position information of the ground station;
• determining an operating mode of a power amplifier on the UAV according to the distance and a distance judgment rule, wherein the distance judgment rule includes distance change trend attributes and stores correspondences between distance thresholds and operating modes of the power amplifier;
• sending a control signal corresponding to the operating mode to the power amplifier
• controlling the power amplifier to select a gain parameter threshold corresponding to the operating mode according to the control signal and to perform power amplification of a RF transmitting signal according to the gain parameter threshold;
• and
• sending the amplified signal to the ground station;
• acquiring a distance change trend of the distance between the UAV and the ground station within a preset duration;
• selecting a distance judgment rule corresponding to the distance change trend according to the distance change trend;
• determining a distance change trend of a distance corresponding to a current moment with respect to a distance corresponding to a first moment, wherein the first moment is a historical moment that differs from the current moment by a first preset duration;
• and
• if the distance change trend of the current moment with respect to the first moment is opposite to a distance change trend of the first moment with respect to a second moment, wherein the second moment is a historical moment that differs from the first moment by a second preset duration, increasing or decreasing an original distance threshold by a preset value.

An unmanned aerial vehicle (UAV), comprising:

• a processor;
• a power amplifier;
• and
• an antenna;
• wherein the processor is configured to:
• acquire position information of the UAV and position information of a ground station, wherein the ground station and the UAV are communicated wirelessly;
• determine a distance between the UAV and the ground station according to the position information of the UAV and the position information of the ground station;
• determine an operating mode of a power amplifier on the UAV according to the distance and a distance judgment rule, wherein the distance judgment rule includes change trend attributes and stores correspondences between distance thresholds and operating modes of the power amplifier;
• and
• send a control signal corresponding to the operating mode to the power amplifier;
• acquire a distance change trend of the distance between the UAV and the ground station within a preset duration, and select a distance judgment rule corresponding to the distance change trend according to the distance change trend;
• determine a distance change trend of a distance corresponding to a current moment with respect to a distance corresponding to a first moment, wherein the first moment is a historical moment that differs from the current moment by a first preset duration;
• and
• if the distance change trend of the current moment with respect to the first moment is opposite to a distance change trend of the first moment with respect to a second moment, wherein the second moment is a historical moment that differs from the first moment by a second preset duration, increase or decrease an original distance threshold by a preset value;
• wherein the power amplifier is configured to select a gain parameter threshold corresponding to the operating mode according to the control signal, and perform power amplification of the RF transmitting signal according to the gain parameter threshold;
• and
• wherein the antenna is configured to send the amplified signal to the ground station.