Apparatus and method for receiving tag signal in mobile RFID reader
First Claim
1. A tag signal receiving apparatus for a Radio Frequency Identification (RFID) reader, comprising:
- a digital demodulating block for performing Amplitude Shift Keying (ASK) demodulation onto a digital tag signal received through a reader antenna and converted by an analog-to-digital (AD) converter; and
a decoding block for detecting edge position information of the demodulated tag signal by performing accumulation and decoding the demodulated tag signal by using the detected edge position information.
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Abstract
Provided are a tag signal receiving apparatus that can perform digital Amplitude Shift Keying (ASK) demodulation onto signals received in a tag, decode the demodulated tag signal in synchronization, and acquire tag data in a mobile RFID reader, and a method thereof. The tag signal receiving apparatus includes: a digital demodulating block for performing ASK demodulation onto a digital tag signal received through a reader antenna and converted into a digital tag signal in an analog-to-digital (AD) converter; and a decoding block for detecting edge position information of the demodulated tag signal by performing accumulation and decoding the demodulated tag signal by using the detected edge position information. The digital demodulating block includes a channel level comparator, a phase inverter, a signal converter; and an adder. The decoding block includes an edge information detector, a correlator, and a bit data decider.
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Citations
38 Claims
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1. A tag signal receiving apparatus for a Radio Frequency Identification (RFID) reader, comprising:
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a digital demodulating block for performing Amplitude Shift Keying (ASK) demodulation onto a digital tag signal received through a reader antenna and converted by an analog-to-digital (AD) converter; and a decoding block for detecting edge position information of the demodulated tag signal by performing accumulation and decoding the demodulated tag signal by using the detected edge position information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A tag signal receiving method for an RFID reader, comprising the steps of:
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a) converting a tag signal received through a reader antenna into a digital tag signal; b) performing digital Amplitude Shift Keying (ASK) demodulation onto the digital tag signal; c) detecting edge position information of the demodulated tag signal; d) decoding the demodulated tag signal based on the detected edge position information; and e) detecting a preamble from the decoded tag data. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A Radio Frequency Identification (RFID) reader mounted on a wireless communication terminal, comprising:
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a digital demodulating block for performing Amplitude Shift Keying (ASK) demodulation onto a digital tag signal received through a reader antenna and converted by an analog-to-digital (AD) converter; a decoding block for detecting edge position information of the demodulated signal and decoding the demodulated signal based on the detected edge position information; and a reader control unit for acquiring tag data from the decoded tag signal and transferring the tag data to the wireless communication terminal. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification