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Symbol Detection Method for Environmental Backscatter System Based on Manchester Coding

A technology of backscattering and detection methods, applied in the field of wireless communication, to achieve the effect of reducing communication delay and widely used

Active Publication Date: 2019-10-25
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of detector needs to estimate the decision threshold, which will introduce obvious time delay, and is only applicable to the situation of "0" and "1" symbols, which has great limitations.

Method used

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  • Symbol Detection Method for Environmental Backscatter System Based on Manchester Coding
  • Symbol Detection Method for Environmental Backscatter System Based on Manchester Coding
  • Symbol Detection Method for Environmental Backscatter System Based on Manchester Coding

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Embodiment Construction

[0031] The present invention will be further described below in combination with specific embodiments and accompanying drawings.

[0032] Such as figure 1 As shown, the environmental backscattering system is composed of an environmental radio frequency signal source, an electronic tag and a reader. The environmental backscattering system uses the environmental radio frequency signal as a carrier signal, and the electronic tag modulates the carrier signal. Information.

[0033] Among them, h st 、h tr and h sr Represent the channel parameters between the environmental radio frequency signal source and the electronic tag, the electronic tag and the reader, and the environmental radio frequency signal source and the reader, and assume that it is a Rayleigh channel that is invariant in the coherence time.

[0034] Such as figure 2 As shown, the symbol detection method based on the Manchester coded ambient backscatter system includes the following steps:

[0035] 1) The elect...

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Abstract

The invention relates to a symbol detection method of an environmental backscatter system based on Manchester encoding. The environmental backscatter system comprises an environmental radio frequencysignal source, an electronic tag and a reader. The method comprises the following steps: 1) the electronic tag performs Manchester encoding on the original binary symbols, and determines to reflect environmental radio frequency signals or not according to a Manchester code; and 2) the reader judges the original binary symbols of the electronic tag in view of the received signals by using a self comparison test method. By adoption of the detection method, the energy at the front and back of the Manchester code corresponding to each original binary symbol needs to be compared, thereby omitting the estimation of the threshold and greatly shortening the communication delay.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a symbol detection method of an environmental backscattering system based on Manchester coding. Background technique [0002] The Internet of Things is a hot development field in the current wireless communication industry, which has attracted great attention from the industry and academia. One of the characteristics of the Internet of Things is that a large number of devices need to be connected to the network through wireless communication technology, which brings several huge challenges to the actual deployment. First of all, due to the large number of devices, the cost of a single device cannot be too high. At the same time, massive scattered devices make daily battery maintenance difficult. Therefore, how to effectively solve the above key issues is crucial to the development of the Internet of Things. [0003] Backscatter communication is a promising technology to s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H03M5/12G06K7/10
CPCG06K7/10009H03M5/12H04L1/0014H04L1/0033H04L1/0036
Inventor 钟财军陶琴张朝阳
Owner ZHEJIANG UNIV