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Manchester signal decoding method and device

A decoding method and a technology of a decoding device, which are applied in the field of Manchester signal decoding methods and devices, can solve problems such as false triggering of modulated waveforms, decoding failures, and label chips that are not strictly synchronized, and achieve stable decoding effects

Active Publication Date: 2021-03-16
GUANGZHOU INTELLIGENT CITY DEV INST
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Problems solved by technology

However, in practical applications, there will be a complex situation where multiple tag chips respond at the same time, and the responses of multiple tag chips are not strictly synchronized. In fact, there will be a certain magnitude of phase difference between their phases, resulting in modulation waveforms false triggering of
If you sample directly, it is easy to cause decoding failure and communication interruption

Method used

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  • Manchester signal decoding method and device
  • Manchester signal decoding method and device
  • Manchester signal decoding method and device

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Embodiment Construction

[0036] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0037] figure 1 It is a schematic flowchart of the Manchester signal decoding method provided by the present invention. refer to figure 1 , the Manchester signal decoding method provided by the present invention may include:

[0038] S110. Sampling the synchronous Manchester input signal within half of the basic time unit etu to obtain a sampling signal;

[0039] S120. Determine that the ...

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Abstract

The present invention provides a Manchester signal decoding method and device. The method includes: sampling a synchronous Manchester input signal within half etu to obtain a sampling signal; determining that the number of pulses of the sampling signal reaches a preset number, and adjusting the level of the sampling signal to a low level ; Decode the sampled signal adjusted to the low level to obtain the Manchester decoded signal within the half etu. The Manchester signal decoding method and device provided by the present invention can realize the decoding of the Manchester signal accurately and stably.

Description

technical field [0001] The invention relates to the technical field of signal modulation and demodulation, in particular to a Manchester signal decoding method and device. Background technique [0002] In the communication process of non-contact RFID (Radio Frequency Identification, radio frequency identification) equipment, if the tag chip uses the OOK (On-Off Keying, on-off keying) modulation method in the process of replying to the reader, then the code modulation process will be There will be a certain number of pulses. In 1 etu (elementary time unit, basic time unit), the modulation appears in different positions to represent different coded information. [0003] During the communication of RFID equipment, the tag chip will reply the reader with thousands of bits of coded data, which will form a large number of modulation or non-modulation, modulation in different positions and other combinations on the signal line, which gives the coded signal Accurate decoding and t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/49H03M5/12
CPCH03M5/12H04L25/4904
Inventor 胡建国李洋王德明吴劲林格王金桥
Owner GUANGZHOU INTELLIGENT CITY DEV INST