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High-Order Directional Modulation Method Based on Beamforming

A technology of beamforming and direction modulation, which is applied in the direction of modulation carrier system, multi-carrier system, diversity/multi-antenna system, etc. It can solve the problems of relative phase relationship distortion and the inability of eavesdroppers to demodulate communication information, etc.

Active Publication Date: 2020-07-31
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

The relative phase relationship between the received signal constellation points of the transmitted wireless communication signal in the desired azimuth is the same as that of the baseband digital modulation signal, and legitimate users can normally demodulate the received signal; instead of the relative phase relationship between the desired azimuth eavesdropping receiver received signal constellation points The relationship is distorted, and the eavesdropper cannot demodulate the communication information from the received signal

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  • High-Order Directional Modulation Method Based on Beamforming
  • High-Order Directional Modulation Method Based on Beamforming
  • High-Order Directional Modulation Method Based on Beamforming

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Embodiment Construction

[0024] The present invention will be described below in conjunction with the accompanying drawings.

[0025] A method for realizing high-order directional modulation based on beamforming, the specific steps are as follows:

[0026] S1: Establish an antenna far-field model different from traditional beamforming: Assume that the number of antenna arrays is N=16, and the distance between array elements is λ / 2.

[0027] It can be seen from the formula that the far-field radiation vectors are consistent in different modulation symbols, and the safety of the radiation electric field can be effectively enhanced by introducing a new degree of freedom in different modulation symbols.

[0028] In directional modulation (DM), G mn with D m The changes are constantly updated, and the as a new complex gain G mn ' to control the beamforming network while replacing the baseband D m It can also be regarded as a new antenna weight.

[0029] S2: Divide the 16APSK modulation constellati...

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Abstract

The invention belongs to the field of array signal processing in communication technology, and is used in high-speed transmission requiring anti-eavesdropping communication, and the realization method is high-order direction modulation based on beamforming. The invention provides a high-order direction modulation method based on beamforming. The method of the present invention utilizes the gain magnification of the beamforming to realize the modulation of different amplitudes when dealing with high-order modulation, and approaches the traditional beamforming gain as far as possible. The direction modulation method is used to update the array element weights instead of the baseband modulation, while ensuring the safety of the desired direction and the non-reduction of the beamforming gain.

Description

technical field [0001] The invention belongs to the field of array signal processing in communication technology, and is used in high-speed transmission requiring anti-eavesdropping communication, and the realization method is high-order direction modulation based on beamforming. Background technique [0002] With the wide application of wireless communication technology in different industries, the security of communication information in the transmission process has attracted more and more attention. Traditional solutions use keys and secure transmission protocols to ensure the security of communication information, but with the enhancement of eavesdroppers' computing power and the development of new decentralized networks, traditional security solutions are increasingly challenged . Physical layer security is a research hotspot developed on the basis of Shannon's information theory in recent years, using the characteristics of wireless communication systems to solve the ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06H04L27/34
CPCH04B7/0617H04L27/3477
Inventor 程龙岳光荣曾丽群余代中邹显炳李少谦
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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