Anti-blackout communication method based on carrier aggregation and frequency diversity

A frequency diversity and carrier aggregation technology, applied in signaling distribution, transmission path separation device, transmission path sub-channel distribution, etc., can solve the problems of changing the shape of the aircraft, difficult to implement, etc., to increase the bandwidth span and ease the communication distance. short effect

Inactive Publication Date: 2020-03-06
NORTHWESTERN POLYTECHNICAL UNIV
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However, both of these methods need to change the s

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  • Anti-blackout communication method based on carrier aggregation and frequency diversity
  • Anti-blackout communication method based on carrier aggregation and frequency diversity
  • Anti-blackout communication method based on carrier aggregation and frequency diversity

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0017] After the aircraft enters the atmosphere, the invention assists in the detection of the interruption state of the communication link through the detection of the state information such as the distance to the ground and the temperature of the shell. After the conventional communication link is interrupted, switch to the anti-black barrier communication system of the present invention, that is, the communication information is respectively modulated to subcarriers of different frequency bands through OFDM carrier aggregation technology, and these subcarriers are located in different frequency bands such as low frequency, intermediate frequency and high frequency. , the same transmission information is modulated on each subcarrier. The receiving end obtains multiple bac...

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Abstract

The invention provides an anti-blackout communication method based on carrier aggregation and frequency diversity, and the method comprises the steps: detecting the to-ground distance and housing temperature of an aircraft after the aircraft enters the atmosphere, and carrying out the detection of the interruption state of a communication link after the to-ground distance and housing temperature reach a set parameter range; after the communication link is interrupted, modulating the communication information to subcarriers of different frequency bands through an OFDM carrier aggregation technology, wherein the same transmission information is modulated on each subcarrier; and enabling a receiving end to obtain backups of a plurality of pieces of sent information by performing data demodulation on the corresponding subcarriers, merge and judge the information through frequency diversity, and finally recover the sent information.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to an anti-blackout communication method. Background technique [0002] The black barrier is a kind of plasma sheath formed around the aircraft as a result of the interaction between the air and the friction with the air to form a high temperature when the aircraft returns to the earth at high speed. Spread, thus forming a black barrier. Black obstacles will seriously affect the measurement and control and information transmission of the aircraft. [0003] In the prior art, anti-black barrier communication can be achieved by changing the strength of the magnetic field. R.L.Stenzel and J.M.Urrutia et al. described the method in the document "A New Method for Removing The Blackout Problem OnReentry Vehicles": an insulated conductor immersed in the plasma through a pulsed current generates a rising magnetic field, thereby magnetizing the electrons and causing them to b...

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Application Information

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IPC IPC(8): H04L5/00
CPCH04L5/001H04L5/0055H04L5/0098
Inventor 左晓亚姚如贵徐娟王圣尧
Owner NORTHWESTERN POLYTECHNICAL UNIV
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