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A secure transmission method of a wireless energy-carrying cooperative system

A cooperative system and secure transmission technology, applied in the field of wireless communication and physical layer security, can solve the problems of loss of spectral efficiency, waste of resources, etc., and achieve the effects of good system performance, optimized security performance, and low bit error rate

Active Publication Date: 2019-05-10
CHONGQING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Transmitting a packet in half-duplex mode requires two time slots, with a 50% loss in spectral efficiency
In addition, TS mode needs to use one time slot for energy collection and one time slot for data transmission, which is a waste of resources

Method used

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  • A secure transmission method of a wireless energy-carrying cooperative system
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  • A secure transmission method of a wireless energy-carrying cooperative system

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Embodiment 1

[0050] Such as figure 1 As shown, the system model used in the present invention is composed of a source node S, a destination node D, a single-antenna eavesdropping node E and a multi-antenna full-duplex relay node R. There are direct links between source node S and eavesdropping node E, source node S and relay node R, relay node R and destination node D, relay node R and eavesdropping node E, and their respective channel coefficients are expressed as h se , h sr , h rd , h re ; where M is the number of antennas of the relay node. The self-interference caused by the full-duplex relay can be suppressed to a large extent by using the self-interference cancellation technology, but the present invention still considers that the relay node has residual self-interference, which is defined as h si ,

[0051] The present invention assumes that all channels experience independent Rayleigh fading and that the fading remains constant over the same transport block. ||.|| rep...

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Abstract

The invention belongs to the technical field of physical layer security, and provides a secret transmission method of a wireless energy-carrying cooperative system, and the transmission method comprises the steps: realizing system secret rate maximization on the basis of comprehensively considering energy collection constraint and cooperative interference performance; A relay node of the system isprovided with a plurality of antennas and works in a full duplex mode, a power switching mode is adopted for energy collection and data receiving and transmitting, artificial noise is sent for collaborative interference while information signals are forwarded, and the signal-to-noise ratio of a destination node is increased by adjusting an antenna array matrix by adopting a beam forming technology; According to the method, the energy collection constraint and the cooperative interference performance are comprehensively considered, the maximum confidentiality rate is taken as an objective function, and the optimal values of an energy collection factor and a cooperative interference power distribution factor are solved; Simulation results show that the proposed confidential transmission scheme can effectively improve the confidentiality rate of the system.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to the technical field of physical layer security, and relates to a secure transmission method of a wireless energy carrying cooperation system. Background technique [0002] In recent years, researchers have proposed an energy harvesting scheme based on Radio Frequency (RF) signals, that is, RF signals transmit energy while transmitting information. This transmission method is defined as Simultaneous Wireless Information and Power Transfer (Simultaneous Wireless Information and Power Transfer, SWIPT for short), which is a promising energy replenishment method for devices with limited battery capacity. The system can work in a time switching (Time Switching, TS for short) mode and a power switching (Power Switching, PS for short) mode to process data transmission and energy collection. However, the connection and wireless access of thousands of mobile devices makes t...

Claims

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Application Information

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IPC IPC(8): H04W12/02H02J50/20
Inventor 张梦郑建宏
Owner CHONGQING UNIV OF POSTS & TELECOMM
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