BPSK modulation circuit based on low-power-consumption backscattering amplification tag and method thereof

A technology of backscattering and modulating circuits, applied in the field of wireless communication, can solve the problems of increased circuit complexity and increased power consumption, and achieve the effect of simple circuit implementation

Active Publication Date: 2021-06-29
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the power consumption of the existing phase-shift control circuit

Method used

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  • BPSK modulation circuit based on low-power-consumption backscattering amplification tag and method thereof
  • BPSK modulation circuit based on low-power-consumption backscattering amplification tag and method thereof
  • BPSK modulation circuit based on low-power-consumption backscattering amplification tag and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0049] Example one

[0050] See figure 1 , figure 1 It is a schematic structural diagram of a BPSK modulation circuit based on a low power reverse scattering amplification label according to an embodiment of the present invention. This embodiment proposes a BPSK modulation circuit based on low-power reverse scattering amplification label including an antenna, low power reverse scattering amplifying label, bias voltage switching module.

[0051]Specifically, the BPSK modulation circuit includes a low power reverse scattering amplifying label, a bias voltage switching module, and an antenna, in particular: the function of the bias voltage switching module is to provide different bias voltages to control different offset. The voltage is powered on low-power reverse scattering label; the effect of low power reverse scattering amplification label is to enlarge the incident excitation signal with lower power consumption, and the specific bias voltage switching module makes low power. To...

Example Embodiment

[0061] Example 2

[0062] On the basis of one of the above embodiments, see Figure 4 , Figure 4 It is a flow chart of a BPSK modulation method based on low power reverse scattering amplification label according to an embodiment of the present invention. This embodiment proposes a BPSK modulation method based on low-power reverse scattering amplification label, based on the BPSK modulation circuit based on low power reverse scattering amplified label according to Embodiment, and specifically includes the following steps:

[0063] Step 1, the bias voltage switching module provides a number of bias voltages.

[0064] Specifically, the bias voltage switching module outputs a number of different bias voltages through the DAC module of the single chip microcomputer to power the low power consumption reverse scattering amplification tag for different bias voltages.

[0065] Step 2, measuring the low-power reverse scattering amplification label at several bias voltages to enlarge the inci...

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Abstract

The invention discloses a BPSK modulation circuit and method based on a low-power-consumption backscattering amplification tag, the circuit comprises an antenna, the low-power-consumption backscattering amplification tag and a bias voltage switching module, wherein the antenna is used for receiving an incident excitation signal; the bias voltage switching module is used for providing different bias voltages; the low-power-consumption backscattering amplification tag is respectively connected with the antenna and the bias voltage switching module and is used for amplifying the incident excitation signal according to the different bias voltages and outputting a scattering signal; and the antenna is also used for sending the scattering signal. The bias voltage switching module performs switching power supply on the low-power-consumption backscattering amplification tag, and utilizes different impedances presented by the low-power-consumption backscattering amplification tag under different bias voltages to change phase information of a scattering coefficient of the low-power-consumption backscattering amplification tag so as to realize BPSK modulation, and the circuit is simple to realize.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a BPSK modulation circuit based on a low-power backscattering amplification tag and a method thereof. Background technique [0002] In passive RFID systems, when the antenna senses a current through an incoming radio frequency signal, it provides enough power to drive an integrated circuit on the tag and respond, using a technique known as backscatter modulation. Therefore, the antenna must be designed to be able to collect power from the incoming signal and send out a backscattered signal. [0003] In current RFID, generally speaking, no-gain backscatter tags and simple LC circuits are used for phase modulation of backscatter signals. Satisfied well, but the operability of the circuit and the instability of the phase modulation and the transmission distance are also a problem that needs to be faced. Using a control circuit capable of phase shifting t...

Claims

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Application Information

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IPC IPC(8): H04L27/20H04W4/80
CPCH04L27/20H04W4/80Y02D30/70
Inventor 马涛钟林灵马彩虹
Owner XIDIAN UNIV
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