Decoding device and decoding method

A decoding device and decoding technology, applied in the field of signal decoding, can solve problems such as decoding errors and wrong judgments of the decoder 6, and achieve the effect of improving the accuracy rate and avoiding decoding errors

Active Publication Date: 2010-03-17
MEDIATEK INC
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Problems solved by technology

Because the result of decoder 6 judging the digital logic value of this bit has an inseparable relationship with the setting of the critical value of the cor

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  • Decoding device and decoding method

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[0033] The first specific embodiment of the present invention is a decoding device. In this embodiment, the decoding device can be applied to an RFID system and used to decode data signals containing a plurality of bits. After the data signal is sampled, a plurality of sampled data can be generated. Such as image 3 As shown, the data signal includes a header section and a data section, and the data section immediately follows the header section and includes the plurality of bits. Each of the plurality of bits has the same bit period.

[0034] In this embodiment, the data signal can be encoded by Manchester encoding method, differential Manchester encoding method or other similar encoding methods. The so-called "Manchester encoding method" is a commonly used encoding method in many local area networks. Its main characteristic is that no matter the digital logic value of the bit of the data signal is 0 or 1, there will ideally be a transition between a high logic level and a lo...

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Abstract

The invention discloses a decoding device and a decoding method, which can effectively avoid the phenomenon of decoding errors easily because the conventional RFID system decodes signals by adopting an association method so as to improve the accuracy of the RFID system in signal decoding. The decoding device is applied to data signals comprising a plurality of bits. The data signals generate a plurality of sampling data after being sampled. The bits have the same bit period. The decoding device comprises a statistical module and a decision module, wherein the statistical module sets a first time section and a second time section of the bit period for a specific bit, generates a first count according to the sampling data corresponding to a first logic level in the first time section, and generates a second count according to the sampling data corresponding to a second logic level in the second time section; and the decision module decides a numerical logic value of the specific bit according to the first count and the second count.

Description

technical field [0001] The present invention relates to signal decoding, in particular to a decoding device and method applied to a radio frequency identification (Radio Frequency Identification, RFID) system. Background technique [0002] In recent years, research related to radio frequency identification (RFID) has developed rapidly. The so-called "RFID technology", in simple terms, is a non-contact RFID technology composed of tags and readers. automatic identification technology. Please refer to FIG. 1 . FIG. 1 is a partial schematic view of a traditional high-frequency RFID receiving device. As shown in FIG. 1 , the high-frequency RFID receiving device 2 receives signals from an RFID reader or an RFID tag through an antenna 3 . After the signal is processed by the analog circuit 4 and sampled by the sampling circuit 5, it will be sent to the decoder 6 for decoding. [0003] Generally speaking, the decoder 6 of the high-frequency RFID receiving device 2 mostly uses a c...

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Application Information

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IPC IPC(8): G06K7/00H03M5/12
Inventor 张琼宏蒋英杰
Owner MEDIATEK INC
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