Space-time block coding unmanned aerial vehicle relay communication flight path planning method

Abstract

The invention relates to a space-time block coding unmanned aerial vehicle relay communication flight path planning method which comprises the steps of: establishing a space-time block coding unmanned aerial vehicle relay communication system model, which comprises the sub-steps of: at a moment t, transmitting signals in a space-time block coding mode at two continuous time slots at a mobile access node under a certain power by two transmitting antennas; by an unmanned aerial vehicle, receiving signals from the mobile access node at a first time slot and at a second time slot, and forwarding the received signals under a certain power; and receiving signals transmitted by the unmanned aerial vehicle at third and fourth time slots by a base station node, and carrying out related merging processing on the received signals by a receiver of the base station node; and establishing a flight path planning model of an unmanned aerial vehicle relay communication system, which comprises the sub-steps of: obtaining ergodic capacity of the unmanned aerial vehicle relay communication system at the moment t; respectively obtaining a distance from the mobile access node to the unmanned aerial vehicle and a distance from the unmanned aerial vehicle to the base station node; and establishing the flight path planning model of the unmanned aerial vehicle relay communication system. According to the space-time block coding unmanned aerial vehicle relay communication flight path planning method disclosed by the invention, reliability of transmission of point-to-point unmanned aerial vehicle relay communication link is effectively improved.

Description

technical field [0001] The invention relates to a method for planning a relay communication track of an unmanned aerial vehicle. In particular, it relates to a space-time block coding UAV relay communication trajectory planning method. Background technique [0002] UAV relay communication is an important technical means to realize long-distance point-to-point wireless communication. Compared with fixed relay communication, UAV relay communication has many advantages such as long communication distance, convenient deployment, flexible and controllable relay position, quick system construction, and low maintenance cost. Therefore, UAV relay communication is widely used in military and civilian applications. It has been widely used in the field [1-2]. At the same time, due to the high-speed maneuverability of UAVs and the limited energy of UAVs, and in order to ensure the connectivity and reliability of the UAV relay communication system, the problem of UAV trajectory plannin...

AI Technical Summary

Problems solved by technology

In practical application, this method has the following defects: the channel capacity is small, the probability of interruption is high, and the reliability is poor

The main defect of this scheme is that both the source node transmitter and the destination node receiver need to know the fading information of the channel accurately, and it is difficult for the transmitter to obtain the channel fading information in practical applications, so this method is very difficult to apply in the actual system

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