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Carrier elimination method and device

A carrier and register technology, applied in the field of RFID readers, can solve the problem of poor reception performance of the reader, and achieve the effect of improving the reception performance

Inactive Publication Date: 2018-07-03
AEROSPACE INFORMATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, one of the technical problems solved by the embodiments of the present invention is to provide a method and device for carrier cancellation, to overcome the defect of poor receiving performance of the reader in the prior art, and to improve the receiving performance of the reader Effect

Method used

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  • Carrier elimination method and device

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Experimental program
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Effect test

Embodiment 1

[0059] figure 1 It is a flowchart of a carrier cancellation method provided by an embodiment of the present invention. Such as figure 1 As shown, the carrier cancellation method of this embodiment includes:

[0060] S101. Acquire an optimal register value of the first register, where the first register is associated with the first carrier of the transmitting end.

[0061] Specifically, the reader of the RFID system mainly includes: a transceiver and a control chip; wherein the transceiver includes a transmitter and a receiver, the transmitter is used to transmit a carrier signal, and the receiver is used to receive the signal returned by the tag; the control chip is the reader The core component of the writer has registers in the control chip that control the transmitter to transmit carrier signals. By configuring different register values, the transmitter is controlled to transmit carrier signals with different power levels. The carrier signal transmitted by the transmitti...

Embodiment 2

[0076] This embodiment is a supplementary description of the above-mentioned embodiments. figure 2 It is a flow chart of a carrier cancellation method provided by another embodiment of the present invention. Such as figure 2 As shown, the carrier cancellation method of this embodiment includes:

[0077] S201. Acquire an optimal register value of a first register, where the first register is associated with a first transmitting end carrier.

[0078] Step S201 in this embodiment is implemented in the same manner as step S101 in Embodiment 1 above, and will not be repeated here.

[0079] S202. Acquire an optimal register value of the second register, where the second register is associated with the second carrier of the transmitting end.

[0080] Step S202 in this embodiment is implemented in the same manner as step S102 in Embodiment 1 above, and will not be repeated here.

[0081] S203. Configure the optimal register value of the first register to the first register and c...

Embodiment 3

[0093] image 3 It is a schematic structural diagram of a carrier cancellation device according to another embodiment of the present invention. Such as image 3 As shown, the carrier cancellation device in this embodiment includes:

[0094] The first acquisition module 30 is configured to acquire the optimal register value of the first register, the first register being associated with the first carrier of the transmitting end;

[0095] The second acquiring module 31 is configured to acquire the optimal register value of the second register, the second register is associated with the second carrier of the transmitting end;

[0096] The processing module 32 is configured to configure the optimal register value of the first register to the first register and configure the optimal register value of the second register to the second register to obtain a signal at the receiving end with the smallest signal power. The signal at the receiving end with the smallest signal power is ...

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Abstract

The invention provides a carrier elimination method and device, which belong to the technical field of RFID readers. According to the carrier elimination method and the device provided in the invention, the optimal register value of a first register is acquired and configured to the first register and the first register is related to first-path transmission terminal carriers; the optimal registervalue of a second register is acquired and configured to the second register and the second register is related to second-path transmission terminal carriers; and thus, receiving-terminal signals withthe minimum signal power can be acquired at the receiving terminal, the receiving-terminal signals subjected to carrier elimination can be received at the receiving terminal, and the receiving performance of the reader is thus improved.

Description

technical field [0001] The embodiment of the present invention relates to the technical field of RFID reader-writers, in particular to a method and device for carrier cancellation. Background technique [0002] Radio Frequency Identification (RFID) is a non-contact automatic identification technology that uses electromagnetic fields as the medium for energy and information transmission to complete the information exchange between the host and the measured object. It has the advantages of non-contact, fast reading speed, high recognition efficiency, can handle multiple tags at the same time, and is safe and not easy to attack. It is widely used in various fields such as logistics, security, anti-counterfeiting, transportation, and automatic production. It has broad development prospects. . [0003] A typical RFID system consists of two basic parts: the reader / interrogator and the tag (Tag / Transponder). In the UHF RFID system, the energy required for the passive tag chip to w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K17/00
CPCG06K17/0029
Inventor 邓海何义生董旭
Owner AEROSPACE INFORMATION