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Secure transmission method based on artificial noise and beamforming in downlink full-duplex relay network

A relay network and artificial noise technology, applied in security devices, transmission systems, network planning, etc., to achieve the effect of increasing security transmission rate, improving security performance, and reducing channel quality

Active Publication Date: 2020-08-18
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of malicious eavesdroppers eavesdropping on each hop of the relay network, the present invention proposes a secure transmission method based on artificial noise and beamforming in the downlink full-duplex relay network

Method used

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  • Secure transmission method based on artificial noise and beamforming in downlink full-duplex relay network
  • Secure transmission method based on artificial noise and beamforming in downlink full-duplex relay network
  • Secure transmission method based on artificial noise and beamforming in downlink full-duplex relay network

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Embodiment Construction

[0051] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0052] figure 1 Given the system framework diagram, consider a model in which a relay assists a base station in transmitting private information to a legitimate receiver, and there is an eavesdropper trying to eavesdrop on every hop of the relay network. Assume that due to fading, obstacles, etc., there is no direct link between legitimate users and base stations. The relay node is equipped with N antennas and works in full-duplex mode, while the remaining nodes are equipped with 1 antenna and work in half-duplex mode. Among them, the relay points use N antennas to send interference signals to eavesdroppers while receiving or sending private signals. Each channel obeys independent and identically distributed Rayleigh fading with mean 0 and variance 1. The noise generated by each node is Gaussian white noise with a mean of 0 and a variance of 1.

[0053] b...

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Abstract

The invention discloses a safety transmission method based on manual noise and beam forming in a downlink full-duplex relay network. The method comprises two stages: in a first stage, a full-duplex relay receives signals of a base station and transmits interference signals to an eavesdropper to puzzle the eavesdropper; and in a second stage, the relay combines amplified signals with the manual noise and transmits the combined signals and noise to a legal receiving terminal, wherein the legal receiving terminal obtains private signals transmitted by the base station through direct decoding, andthe eavesdropper tries to obtain the private signals by employing maximal-ratio combining. The network successfully puzzles the eavesdropper through the design of manual noise and beam forming of a relay node. To maximize the safety transmission rate of the network, a corresponding constraint condition and an optimization problem are made. According to the method, through solution of the optimization problem, safety transmission based on manual noise and beam forming in the downlink full-duplex relay network is realized.

Description

technical field [0001] The invention belongs to the field of wireless communication, and in particular relates to a safety transmission method based on artificial noise and beamforming in a downlink full-duplex relay network. Through the design of artificial noise and beamforming, the safety performance of the network is improved. Background technique [0002] Full-duplex technology is a technology with great potential in 5G networks. The full-duplex relay network is composed of legal transceivers and full-duplex relays, which can send and receive information at the same time, which greatly improves the capacity of the 5G network. Due to the broadcast nature of wireless networks, full-duplex relay networks are vulnerable to malicious eavesdropping. Therefore, the issue of information security becomes particularly prominent. However, traditional high-level encryption technology is difficult to implement due to its complexity and the heterogeneity of 5G networks. Physical l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W12/02H04W16/28H04K3/00H04B7/155H04L5/14
CPCH04B7/155H04K3/62H04L5/14H04W12/02H04W16/28
Inventor 任品毅李强徐东阳贺洪亮
Owner XI AN JIAOTONG UNIV
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