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NOMA secure transmission method and system combining artificial noise and power distribution

A technology of artificial noise and safe transmission, applied in safety devices, electrical components, wireless communication, etc., can solve problems such as insufficient security of NOMA system, achieve the effect of improving safety, ensuring reliability, and improving safety

Active Publication Date: 2021-04-23
AIR FORCE UNIV PLA
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a NOMA security transmission method and system that combines artificial noise and power distribution to solve the problem of insufficient security of the NOMA system in the prior art

Method used

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  • NOMA secure transmission method and system combining artificial noise and power distribution
  • NOMA secure transmission method and system combining artificial noise and power distribution
  • NOMA secure transmission method and system combining artificial noise and power distribution

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Embodiment 1

[0050] refer to figure 1 , this embodiment discloses a wireless power supply NOMA system, which includes an energy tower PB, a source S, a security-demanding user U1, a reliability-demanding user U2, and M eavesdroppers Em(m∈{1,...,M }), where PB is equipped with N antennas, and other nodes are equipped with single antennas, and the working mode of all nodes is half-duplex; Em tries to eavesdrop on the signal of U1.

[0051] In the following, the communication process is divided into two time periods of energy collection and information transmission, and the working process of the system in each time period is described respectively:

[0052] energy harvesting stage

[0053] 1) PB uses the maximum ratio transmission (MRT) method to send radio frequency signals to S within θT time (θ represents the time ratio of energy collection and information transmission), and the energy collected by S can be expressed as:

[0054] E=ηθTP 0 ||h bs w|| 2 =ηθTP 0 ||h bs || 2

[0055] ...

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Abstract

The invention belongs to the technical field of wireless communication, and discloses a wireless power supply non-orthogonal multiple access (NOMA) safety transmission method and system combining artificial noise and power distribution; for an NOMA system with an eavesdropper, in an energy collection stage, a signal source obtains energy from an energy tower by using an energy collection technology; and in the information transmission stage, the information source sends superposed coded signals to the two users. In an information transmission stage, a dynamic power distribution method is adopted to ensure that a reliable demand user can successfully decode, a security demand user can successfully eliminate serial interference, and meanwhile, an energy tower sends artificial noise to deteriorate the receiving quality of an eavesdropper, so that security transmission between an information source and the security demand user is ensured. Compared with a traditional wireless power supply NOMA system transmission method, the reliability and safety of the system are remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a NOMA safe transmission method and system combining artificial noise and power distribution. Background technique [0002] In order to improve the spectrum efficiency and energy efficiency of future wireless networks, Non-Orthogonal Multiple Access (NOMA) technology and wireless power transmission have attracted extensive attention in the industry. NOMA technology is considered to be a very promising multiple access method in the 5G and post-5G era. Among them, the power domain NOMA technology has received extensive attention due to its low implementation complexity and high compatibility. The basic idea of ​​NOMA in the power domain (hereinafter referred to as NOMA) is to use superposition coding to allocate different powers to different user signals at the transmitting end, and at the same time to use Serial Interference Cancellation (Successive Int...

Claims

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Application Information

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IPC IPC(8): H04W12/122H04W72/04
CPCH04W72/0473Y02D30/70
Inventor 王布宏曹堃锐刁丹玉东润泽程天昊魏青梅胡航
Owner AIR FORCE UNIV PLA
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