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Multi-domain switching communication method based on intelligent decision

A communication method and intelligent decision-making technology, applied in multi-frequency code systems, transmission monitoring, digital transmission systems, etc., can solve the problems of easy interference and easy detection of wireless communication methods, so as to improve anti-interference ability and reduce the risk of signal interception The effect of probability

Active Publication Date: 2021-02-12
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The fixed wireless communication method has defects that are easy to interfere and easy to detect. Therefore, in order to meet the communication requirements of high reliability and high security, a smarter and more flexible communication method is needed

Method used

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  • Multi-domain switching communication method based on intelligent decision
  • Multi-domain switching communication method based on intelligent decision
  • Multi-domain switching communication method based on intelligent decision

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Embodiment Construction

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

[0031] According to the intelligent decision-based multi-domain switching communication method of the present invention, it is assumed that the available transmission frequency band Q=4, the length of each subframe is K=128bit, the modulation adopts QPSK, and the pseudo-random code length L=64, that is, 64 subcarriers. There are three modulation domains, namely time domain, frequency domain and delay-Doppler domain. Combining the transmission frequency band and the modulation domain, there are 12 transmission schemes, and the specific implementation methods are as follows.

[0032] sender such as figure 1 As shown, it specifically includes the following steps:

[0033] Step 1: Sampling the surrounding environment, and analyzing the surrounding electromagnetic environment by the spectrum sensing module to obtain the optimal transmission frequency band....

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Abstract

The invention provides a multi-domain switching communication method based on intelligent decision, which comprises the following steps: counting the power spectrum amplitude of each transmission frequency band to obtain an optimal transmission frequency band, performing MPSK modulation to obtain a modulation symbol, expanding through a non-return-to-zero pseudo random code, transmitting in an OFDM mode, and performing IFFT to realize carrier addition; performing parallel-serial conversion, and adding a cyclic prefix CP in front of each segment of IFFT data; converting from digital to analog and sending in a frequency band; performing reverse processing at receiving end. Due to the fact that the technical means of spectrum sensing and modulation domain switching are adopted, a transmissionchannel with interference can be actively avoided in real time, an idle frequency band is selected for transmission, meanwhile, the modulation domain where transmission information is located is dynamically switched, the anti-interference capacity of a communication system can be improved, and the probability that signals are intercepted can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of wireless communication, and relates to a multi-domain switching communication method. Background technique [0002] Fixed wireless communication methods are prone to interference and detection. Therefore, in order to meet the communication requirements of high reliability and high security, a more intelligent and flexible communication method is needed. Aiming at the complex and changeable electromagnetic environment and eavesdropping methods, the frequency band switching and modulation domain switching methods based on intelligent decision-making provide a new solution. [0003] Multi-domain conversion communication includes two parts. The first part is to estimate the surrounding electromagnetic environment through real-time spectrum sensing, actively select idle or better frequency bands for transmission, and switch frequency bands in time when the channel status changes, so as to avoid The interferen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/382H04L27/26
CPCH04B17/382H04L27/2601Y02D30/70
Inventor 陶明亮段正祥杨欣王伶张兆林谢坚粟嘉汪跃先邢自健范一飞
Owner NORTHWESTERN POLYTECHNICAL UNIV
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