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Diversity access method and system based on iterative detection in drone swarm measurement and control

An iterative detection and access method technology, applied in radio transmission systems, transmission systems, wireless communications, etc., can solve the problem of time-frequency resource division, which cannot meet the needs of practical applications, and the design of access slot frames does not consider service slot integration Design and other issues

Active Publication Date: 2020-11-20
BEIJING RES INST OF TELEMETRY +1
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Problems solved by technology

This document designs a random access method from the perspective of the physical layer and the link layer system frame, but it is difficult to realize different training sequences, and the design of the access slot frame does not consider the integrated design of the service slot, which is not practical enough
[0007] The above-mentioned literatures fail to design dynamic access networking according to the time-frequency resource division characteristics that may be used in specific actual projects, and most of them are for satellite communication or aerospace measurement and control communication research, which cannot meet the needs of practical applications

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  • Diversity access method and system based on iterative detection in drone swarm measurement and control
  • Diversity access method and system based on iterative detection in drone swarm measurement and control
  • Diversity access method and system based on iterative detection in drone swarm measurement and control

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Embodiment 1

[0109] The diversity access method based on iterative detection in the UAV cluster measurement and control of the present invention is analyzed.

[0110] Such as figure 1 Shown is a schematic diagram of the time-frequency planning of the diversity access method based on iterative detection in the UAV cluster measurement and control of the present invention. For example, the superframe can be designed to contain 10 frames, and there are 6 frequency points in total. The superframe length is 200ms, and the frame length is 20ms. The point bandwidth is 1MHz, the frequency band guard interval is 0.2MHz, the frame contains 40 long time slots of 0.5ms, the guard interval in the time slot is 0.1ms, the length of the preamble segment is 208, the length of the signaling segment is 192, and the effective information of the signaling segment is 128 bits. QPSK modulation, 1 / 3 code efficiency Turbo code, 60 first time slots for random access and control, the first frequency point corresponds...

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Abstract

The invention relates to a diversity access method and a system based on iterative detection in the UAV cluster measurement and control. The method uses the same preamble sequence as a training sequence at the sending end, and the signaling part bears the signaling information of the access node. At the receiving end, the random access time slot of each node in the superframe time slot is synchronously detected by the training sequence, and then the access information of all distinguishable nodes is obtained by iterative processing according to the detection result; The method realizes the signal detection under the UAV cluster access collision scenario, and can realize the quasi-time synchronous network access, high-precision synchronous estimation and low signal-to-noise ratio signalingtransmission, improve the system capacity, and reduce packet loss rate and transmission delay.

Description

technical field [0001] The invention relates to the technical field of digital wireless communication transmission, in particular to a diversity access method and system based on iterative detection in unmanned aerial vehicle cluster measurement and control. Background technique [0002] The self-organizing network communication of UAV swarms is the premise of UAV cooperative operations. UAV swarms must have self-organizing network communication capabilities, information perception capabilities, and link invulnerability. The network should meet the requirements of scenarios where nodes join and leave at any time, the topology changes at any time, and the space is highly dynamic. The drone ad hoc network uses drones as network nodes, and each drone is a terminal system and also a route for other drone nodes. The data transmission in the Ad Hoc network adopts the method of competition to access the wireless channel to improve the success rate of information transmission. Acc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/08H04B7/185
CPCH04B7/18506H04W74/0833H04W74/0866H04W74/0891
Inventor 闫朝星付林罡谌明
Owner BEIJING RES INST OF TELEMETRY
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