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Environmental backscatter signal detection method based on clustering analysis

A technology of backscattering and cluster analysis, applied in the field of communication, can solve the problems of increasing the system bit error rate and difficult to estimate the related channel of the AmBC system, and achieve the effect of reducing the system bit error rate and improving the transmission efficiency.

Active Publication Date: 2020-09-18
TAIYUAN UNIV OF TECH
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Problems solved by technology

There are two main reasons for the above mission challenges: (1) the direct link signal is much stronger than the backscatter signal due to the double fading of the backscatter link; (2) unlike the point-to-point system, the correlated channel of the AmBC system hard to estimate
These two reasons lead to a great increase in the bit error rate of the system

Method used

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  • Environmental backscatter signal detection method based on clustering analysis
  • Environmental backscatter signal detection method based on clustering analysis
  • Environmental backscatter signal detection method based on clustering analysis

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Embodiment Construction

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail in combination with the embodiments and accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. The technical solutions of the present invention will be described in detail below in conjunction with the embodiments and drawings, but the scope of protection is not limited thereto.

[0027] A method for detecting environmental backscatter signals based on cluster analysis: specifically the following steps:

[0028] In the first step, design the figure 1 Environmental backscatter communication model in . First describe the proposed AmBC system, and then build its system model under flat fading channel, as figure 1 As shown, the system includes an ambient RF source, a...

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Abstract

The invention discloses an environmental backscatter signal detection method based on clustering analysis, and belongs to the technical field of communication. The objective of the invention is to improve the signal detection performance of a receiver in a downlink of an environmental backscatter system and improve the transmission efficiency of information. The method specifically comprises the following steps: establishing an environment backscatter communication model, extracting a received backscatter signal, extracting a backscatter signal, calculating a distance between an energy set anda clustering center by using a K-means algorithm, determining a cluster to which the energy set belongs, and further decoding a backscatter signal. Through the method, the transmission efficiency ofthe information in the downlink of the environmental backscatter system is effectively improved, and meanwhile, the bit error rate of the system is reduced.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to an environmental backscattering signal detection method based on cluster analysis. Background technique [0002] Wireless communication systems powered by ambient or dedicated Radio frequency (RF) sources have recently attracted considerable attention. Among them, the ambient backscatter communication (AmBC) system enables the backscatter device (BD) to obtain power from the ambient RF signal, and uses the ambient RF signal as a carrier to transmit its information to a nearby receiver. Since AmBC operates on the same frequency band as ambient wireless systems, they can be considered as spectrum sharing systems. Unlike traditional backscatter communications such as radio frequency identification (RFID) systems, AmBC can dispense with reader generation of RF sinusoidal carriers, enabling low-cost and energy-efficient ubiquitous communications. Harvested power from ambient RF ...

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Application Information

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IPC IPC(8): H04L12/24G06K9/62
CPCH04L41/145H04L41/142G06F18/23213Y02D30/70
Inventor 赵菊敏李灯熬张亮
Owner TAIYUAN UNIV OF TECH
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