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Self-synchronizing method of point-to-point communication of UAV data chaining under time division system

A point-to-point communication and data link technology, which is applied in the field of communication engineering, can solve problems such as long initial synchronization time, out-of-synchronization, and data link communication interruption, so as to reduce weight and equipment complexity, improve synchronous locking performance, and avoid serious power waste and the effect on energy consumption

Inactive Publication Date: 2009-08-26
BEIHANG UNIV
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Problems solved by technology

Due to the extremely harsh and complex environment of the UAV communication channel and the large dynamic range of the signal, the external synchronization method assisted by the GPS second pulse signal often loses synchronization due to the missed capture of the pulse signal, and even leads to data link communication in severe cases. Completely interrupted, and an obvious drawback of this synchronization method is that the initial synchronization time is often too long

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  • Self-synchronizing method of point-to-point communication of UAV data chaining under time division system
  • Self-synchronizing method of point-to-point communication of UAV data chaining under time division system
  • Self-synchronizing method of point-to-point communication of UAV data chaining under time division system

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Embodiment Construction

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0031] The self-synchronization method of UAV data link point-to-point communication under a time-division system according to the present invention relies on the core unit of the data link baseband signal processing board, the MCS-51 series single-chip microcomputer. The communication system of the airborne and the ground control station utilizes the characteristic of delay random jitter introduced by the MCS-51 series single-chip microcomputer to deal with the timing interruption, and realizes the time separation of the data transmission of the uplink and downlink data link systems, that is, realizes the time-division system. Establish data link communication by transmitting a fixed synchronization header in each time slot, thereby ensuring the reliability of data interaction between the sending and receiving parties. The process is as follows figure 1 As s...

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Abstract

The invention discloses a self-synchronizing method of point-to-point communication of UAV data chaining under time slot allocation system, which is based on MCS-51 serial singlechips, wherein, the method comprising fives steps of: initializing data chaining communication system, synchronously initializing, synchronously locking, self-adaptedly emitting TSA as well as desynchronizing and resynchronizing. The invention adopts the time slot allocation system to carry out data chaining communication, wherein, an onboard control station and a ground control station adopt the same communication device to complete the sending and the receiving of information under the same working frequency and different time points; adopts point-to-point communication based on equivalent theory, in the synchronously building process, the communication system of the onboard control station and the ground control station has equivalent position without difference between the main and the subsidiary; adopts the self-synchronizing method based on a synchronous head, which is superior to a external-synchronizing method taking GPS second pulse signal as assist on reliability and synchronizing time; and adopts self-adaptedly allocation strategy which emmits time slot based on the the amount of information content in data buffer, thereby, being caplbe of effectively reducing onboad energy consumption.

Description

technical field [0001] The invention belongs to the technical field of communication engineering, and in particular relates to a self-synchronization method for point-to-point communication of an unmanned aerial vehicle data link under a time-division system. Background technique [0002] UAVs are responsible for tasks such as ground monitoring, target tracking, and military strikes. Because of their small size and strong flexibility, they play an extremely important role in the military and civilian fields. The performance of the drone's data link directly determines the safety and flight efficiency of the drone's mission, and it is the brain and eyes of the drone. [0003] UAV data link can be divided into uplink and downlink according to the direction of data transmission. The uplink mainly completes the transmission of remote control commands from the ground station to the UAV, realizing real-time control of flight attitude and command automation; the downlink mainly co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/042H04L7/00
Inventor 熊小军刘添君齐电海
Owner BEIHANG UNIV
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