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Multi-user access backscatter security communication method

A multi-user access and backscatter technology, applied in the field of multi-user access backscatter secure communication, can solve problems such as information leakage, achieve the effect of ensuring information security, increasing the number of user access, and ensuring communication security

Active Publication Date: 2022-05-27
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the backscatter signal propagates freely in space, its information is at risk of leaking

Method used

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  • Multi-user access backscatter security communication method
  • Multi-user access backscatter security communication method
  • Multi-user access backscatter security communication method

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Embodiment Construction

[0053]The following embodiments of the present invention are illustrated by specific specific examples, those skilled in the art may easily understand other advantages and efficacy of the present invention by the contents disclosed in this specification. The present invention may also be implemented or applied by other specific embodiments, the details of the present specification may also be based on different views and applications, without departing from the spirit of the present invention under various modifications or changes. It should be noted that the illustrations provided in the following embodiments illustrate only the basic idea of the present invention in a schematic manner, without conflict, the following embodiments and features in the embodiments may be combined with each other.

[0054] Wherein, the drawings are only used for exemplary illustrations, representing only schematic diagrams, not physical drawings, can not be understood as a limitation of the present i...

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Abstract

The invention relates to a multi-user access backscatter secure communication method, which belongs to the technical field of communication, and comprises the following steps: S1, a full duplex transceiver transmits a multi-carrier continuous wave radio frequency signal to a plurality of backscatter communication devices BD; s2, performing channel estimation to obtain channel estimation states of a plurality of BDs; s3, after channel estimation, the transceiver calculates the safety rate of the system according to a channel estimation result; s4, carrying out optimization design on system parameters; s5, after parameter optimization, the transceiver sends MC-RCW to the plurality of BDs according to an optimized parameter result, and the MC-RCW is used as a radio frequency source of the plurality of BDs in the target area; s6, after the multiple BDs receive the MC-RCW signals sent by the transceiver, backscattering modulation is carried out at the same time; s7, performing down-conversion and filtering on the received backscattering signal by the transceiver, and then moving a radio frequency signal to a base band; and the transceiver demodulates in a merging mode, and decodes the information of the plurality of BDs.

Description

Technical field [0001] The present invention belongs to the field of communication technology, relates to a multi-user access backscattered secure communication method. Background [0002] Traditional backscatter communication (BackCom) uses a single carrier continuous wave as the RF source of the backcom device (BD), BD by changing the antenna impedance and other ways to modulate the reflected wave for backscatter modulation to achieve data transmission, the receiver by docking the amplitude of the received BD reflected signal, phase and other information, the BD transmitted data detection and decoding. Such methods limit the number of BD accesses at the same time, and the BD hardware complexity is usually low, limiting the number of symbols in the modulation codebook, which further limits the data transmission rate of the system. With the development of the Internet of Things, efficient data collection in massive user scenarios has become a very worthy direction for research. I...

Claims

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Application Information

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IPC IPC(8): H04B1/40H04L5/14H04L25/02H04L27/26
CPCH04B1/40H04L5/14H04L27/2601H04L25/0204Y02D30/70
Inventor 白琳陈群白桐
Owner BEIHANG UNIV