Wireless information and power transfer system maximum safety rate optimization method based on NOMA

A technology of wireless energy-carrying communication and safe rate, applied in the field of maximum safe rate optimization of wireless energy-carrying communication system based on NOMA, can solve the problems of access and energy consumption security at the same time, achieve optimal power allocation and save spectrum The effect of resources

Active Publication Date: 2018-09-04
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

However, the existing network is a single NOMA network or SWIPT network, which cannot solve the problems of access, energy consumption and security at the same time

Method used

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  • Wireless information and power transfer system maximum safety rate optimization method based on NOMA
  • Wireless information and power transfer system maximum safety rate optimization method based on NOMA
  • Wireless information and power transfer system maximum safety rate optimization method based on NOMA

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Embodiment

[0029] This embodiment provides a method for optimizing the maximum safe rate of a NOMA-based wireless portable energy communication system, the method comprising the following steps:

[0030] Step 1. Deploy a single-antenna cell base station BS, M information receivers IR and K energy receivers ER in the NOMA-based wireless energy carrying communication system, where ER obtains energy from the signal transmitted by the BS, and can Eavesdropping on the confidential information sent by the BS to the IR; the channel model used in this embodiment is a large-scale fading model, as shown in the formula: where d m =80m, means the distance from IR to BS, α=3 means path fading coefficient, v m ~CN(0,1) is the Rayleigh fading channel gain; where d k =80m, indicates the distance between ER and BS, α=3 indicates path fading coefficient, v k ~CN(0,1) is the Rayleigh fading channel gain; the above channel parameters are independent of each other, and each element is a complex Gaussia...

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Abstract

The invention discloses a wireless information and power transfer system maximum safety rate optimization method based on NOMA; the method comprises the following steps: firstly, a wireless information and power transfer system based on the NOMA is provided, the system is provided with a cell base station BS, M information receivers IRs and K energy receivers ERs, wherein the ER obtains energy from a radio frequency signal transmitted by the BS and eavesdrops on the information sent by the BS to the IR; according to the principle of the NOMA technology, the information transmitted by the BS tothe IR transmits a signal through a superposition coding technology, and the expression is as follows: formula; in the formula, am is the signal transmission power distribution coefficient of the mthIR, P is the signal transmission total power of the BS, xm is the confidential information of the mth IR, and sigma 2 is the additive gaussian white noise; and an optimization parameter AM is adjusted according to the method, certain energy can be provided for the ER, and a certain information rate is provided for the IR; and the purpose of providing the maximum safety information rate is provided for the IR in the case of the ER eavesdropping on information.

Description

technical field [0001] The invention relates to the field of wireless transmission, in particular to a method for optimizing the maximum safe rate of a NOMA-based wireless energy-carrying communication system. Background technique [0002] As the network grows, equipment access and service requirements are increasing, spectrum resources are becoming increasingly scarce, and the required energy consumption is also greatly increasing. NOMA (Non-orthogonal Multiple Access, non-orthogonal multiple access) as a technology that can provide higher spectral efficiency and more access, thus gaining more attention, has become the next generation of mobile communication multiple access technology One of the popular candidates. Different from the previous 3G code division access and 4G orthogonal frequency division multiplexing, the NOMA system allocates the same spectrum resources to multiple users, and realizes power multiplexing by allocating different power, while users with good c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/06H04W52/34
CPCH04W28/06H04W52/34
Inventor 唐杰戴土旺余钰罗静慈冯婉媚
Owner SOUTH CHINA UNIV OF TECH
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