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Method and system for two-node opportunistic cooperative communication based on environmental backscattering

A technology of backscattering and cooperative communication, applied in transmission systems, radio transmission systems, diversity/multi-antenna systems, etc. The effect of reducing the probability of transmission interruption and improving the average sum rate

Active Publication Date: 2021-09-03
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method and system for two-node opportunistic cooperation communication based on environmental backscattering, so as to solve the problems that the backscattering system in the prior art does not have peer-to-peer transmission capability and the transmission reliability is weak.

Method used

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  • Method and system for two-node opportunistic cooperative communication based on environmental backscattering
  • Method and system for two-node opportunistic cooperative communication based on environmental backscattering
  • Method and system for two-node opportunistic cooperative communication based on environmental backscattering

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Embodiment 1

[0079] For the sake of fair comparison, the simulation parameters corresponding to the paper "Outage analysis for cooperative ambient backscattersystems" published by H.Ding et al. in IEEE Wireless Communications Letters in 2020 are set as follows: Receive SNR threshold τ 0 =-35dB, path loss index β=3, the relationship between the average channel power gain and the distance between nodes satisfies l=1,2,3. Without loss of generality, the average channel power gain is set to λ 0 = 1, λ 1 =0.5,λ 2 =0.4, the backscattering efficiency is set to η 1 = η 2 =η=0.6.

[0080] The idea of ​​the simulation program code is as follows: set the parameters, respectively for |h 0 | 2 、 |h 1 | 2 、 |h 2 | 2 、 |h 12 | 2 Generate random samples from exponential distribution10 7 , and then according to the corresponding expression in the previous article, use the known parameters to express α 1 * and alpha 2 * , when α 1 * and alpha 2 * When greater than 1, take 1, when α 1...

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Abstract

The invention belongs to the technical field of wireless communication, and discloses a communication method and system for two-node opportunity cooperation communication based on environment backscattering. Optimal reflection coefficient α for calculating backscatter nodes BD1 and BD2 by 1 * and alpha 2 * , and according to α 1 * and alpha 2 * The value of , select the transmitting and receiving relationship between the backscatter nodes BD1 and BD2, so as to realize the purpose of highly reliable peer-to-peer transmission between the backscatter nodes. The present invention can self-adaptively improve transmission reliability. Compared with the existing environmental backscatter cooperative communication method, it can flexibly select the backscatter transmission direction between two nodes according to the dynamic fluctuation characteristics of wireless channel fading, and adaptively configure the nodes The reflection coefficient is used to ensure the transmission rate requirements of the main system and the backscattering system, and improve the reliability of transmission between nodes.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a method and system for two-node opportunistic cooperation communication based on environment backscattering. Background technique [0002] Environmental backscatter communication technology is a key technology in the passive Internet of Things transmission system by using the electromagnetic waves that already exist in the environment to carry information and realize communication. It has a good application prospect in the 5G mobile communication era. This technology solves the problems of scarcity of available spectrum resources and high energy consumption of the Internet of Things through the secondary utilization of environmental electromagnetic waves. [0003] In the environmental backscatter communication system, the backscatter transmitter has the function of cooperative relay and forwarding of the main system signal, while the backscatter receiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/44H04B7/06
CPCH04B1/44H04B7/0626
Inventor 丁海洋赖泓旭陈华梁金凤李兵刘中伟
Owner NAT UNIV OF DEFENSE TECH
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