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Artificial noise and self-interference zero-forcing joint precoding full-duplex transmission method

A joint precoding and artificial noise technology is applied in the field of artificial noise and self-interference zero-forcing joint precoding full-duplex transmission, which can solve the problems of reducing the complexity of the transmission system.

Active Publication Date: 2021-05-11
HUAQIAO UNIVERSITY
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  • Abstract
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a kind of artificial noise and self-interference zero-forcing joint precoding full-duplex transmission method, under the situation that legal node does not know the Channel State Information (CSI) of eavesdropping channel, in order to improve the existing eavesdropper The security performance of the multi-antenna relay wireless communication system, while reducing the implementation complexity of the transmission system

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  • Artificial noise and self-interference zero-forcing joint precoding full-duplex transmission method

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Embodiment Construction

[0041] In order to make the present invention more comprehensible, a preferred embodiment is now described in detail with accompanying drawings as follows.

[0042] The invention proposes a joint precoding scheme of artificial noise and self-interference zero-forcing, which is applied in a secure wireless communication system including four nodes of a source, a relay, a sink and an eavesdropper.

[0043] The full-duplex relay wiretapping system model is as follows figure 1 As shown, the source A needs to use the relay R to help transmit information to the sink B, and the eavesdropper E can eavesdrop on the information of the source A and the relay R, and both the source A and the sink B are equipped with multiple antennas (respectively N A and N B ), full-duplex trunk configuration N Rt root transmit antenna and N Rr root receiving antenna, and satisfy N A >N Rr and N Rt >N Rr, the eavesdropper E configures a single antenna and transmits a single data stream. In the ca...

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Abstract

The present invention provides a full-duplex transmission method for artificial noise and self-interference zero-forcing joint precoding, including a source, a relay, and a sink, including the following steps: Step 10, the source uses artificial noise precoding to send the required transmission the original signal to the relay; step 20, the relay receives the original signal sent by the source, and processes the original signal into a signal vector received by the relay; step 30, the relay uses artificial noise precoding and self-interference zero-forcing technology to convert the The relay received signal vector is converted into a relay sent signal vector, and then the relay sent signal vector is sent to the sink; step 40, the sink receives the relay sent signal vector by means of maximum ratio combining. The invention improves the safety performance of the multi-antenna relay wireless communication system with eavesdroppers, and at the same time reduces the implementation complexity of the transmission system.

Description

technical field [0001] The invention relates to the fields of wireless communication and physical layer security, in particular to a method for joint precoding full-duplex transmission of artificial noise and self-interference zero-forcing joint. Background technique [0002] In the traditional multi-antenna full-duplex relay security transmission system, the eavesdropper can eavesdrop on the useful signal from the source and the relay. In order to reduce the eavesdropping of the useful signal by the eavesdropping node, it is necessary to design appropriate sending and receiving beamforming vectors, usually using Two schemes: 1) the channel state information (CSI, namely Channel StateInformation: channel state information of known eavesdropping channel at the legal node, in the field of wireless communication, so-called CSI is exactly the channel attribute of communication link. It describes the signal in the The attenuation factor on each transmission path, that is, the val...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0456H04B7/155H04B7/06H04B7/08
CPCH04B7/0456H04B7/0617H04B7/0857H04B7/086H04B7/15585
Inventor 赵睿
Owner HUAQIAO UNIVERSITY
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