| Patent application number | Description | Published |
|---|
| 20090086869 | METHOD AND SYSTEM OF RECEIVING TAG SIGNAL FROM RFID READER - Disclosed are a method and system for receiving a tag signal in a Radio Frequency Identification (RFID) reader. The method includes generating an edge signal using a tag signal received from an RFID tag; extracting edge information from the generated edge signal, and generating an edge clock corresponding to the extracted edge information; and determining bit data with respect to the tag signal using the generated edge clock. | 04-02-2009 |
| 20100026460 | APPARATUS AND METHOD FOR TRANSMIT LEAKAGE SIGNAL SUPPRESSION IN RFID READER - A method and apparatus for suppressing a transmit leakage signal of a radio frequency identification (RFID) reader is provided. The apparatus includes: a first power distributor distributing a transmission signal to output a first transmission signal and a second transmission signal; a second power distributor distributing the second transmission signal to output a third transmission signal and a fourth transmission signal; a first amplitude/phase converter converting an amplitude and a phase of the first transmission signal to generate a first converted signal; a second amplitude/phase converter converting an amplitude and a phase of the third transmission signal to generate a second converted signal; a first power combiner combining the first converted signal with a first leakage signal generated in association with the fourth transmission signal; and a second power combiner combining the second converted signal with a second leakage signal generated in association with the fourth transmission signal. | 02-04-2010 |
| 20100026582 | NEAR-FIELD RADIO FREQUENCY IDENTIFICATION READER ANTENNA - A near-field radio frequency identification (RFID) reader antenna includes: a plurality of pairs of slots being formed on a ground surface of a single dielectric layer to emit a field; and a micro-strip line being formed on another surface of the single dielectric layer and having an open end to feed the plurality of pairs of slots. | 02-04-2010 |
| 20100039227 | APPARATUS AND METHOD FOR DEMODULATING SUBCARRIER TAG SIGNAL IN RFID READER - An apparatus and a method for demodulating a subcarrier tag signal in a radio frequency identification (RFID) reader is provided. The apparatus for demodulating the subcarrier tag signal in the RFID reader may include: an edge signal generation unit receiving a subcarrier tag signal and generating an edge signal with respect to the tag signal; an edge information extraction unit extracting edge information from the generated edge signal; and a decoding unit decoding the tag signal using the extracted edge information. | 02-18-2010 |
| 20110064165 | DEMODULATION APPARATUS AND METHOD FOR RFID READER IN PASSIVE RFID ENVIRONMENT - A demodulation apparatus for a Radio Frequency Identification (RFID) reader includes: a direct current (DC) offset cancellation unit for cancelling DC-offset noise contained in a PSK-modulated or ASK-modulated subcarrier tag signal from the tag signal when the tag signal is received; and a subcarrier digital demodulator for eliminating a subcarrier from the tag signal from which DC-offset noise has been cancelled to demodulate the DC-offset noise-cancelled tag signal. | 03-17-2011 |
| 20110074555 | MOBILE RFID DEVICE AND DATA COMMUNICATION METHOD THEREOF - Provided are a mobile Radio Frequency Identification (RFID) device and a data communication method thereof. In the method, a mobile communication terminal unit provides a command to an mRFID reader unit and receives a response to the command from the mRFID reader unit. It is checked whether there is an error in a protocol message of the command or the response, and the command to the mRFID reader unit according to a check result is re-transmitted. | 03-31-2011 |
| 20110090130 | RFID READER ANTENNA AND RFID SHELF HAVING THE SAME - An RFID reader antenna including: a printed circuit board (PCB) formed as a dielectric substance; a plurality of slot groups, each having a plurality of slots, disposed on a first face of the PCB; a ground face disposed on areas, excluding the plurality of slot groups, of the first face of the PCB; and a feeder formed as a microstrip line with an open end on a second face of the PCB to feed the plurality of slot groups. Because the slots periodically formed on the ground face are fed in series by using the single microstrip line, the RFID reader antenna can reliably recognize a larger area with a simple structure. In particular, the RFID reader antenna can be useful for the bookstands for book management or smart shelves for displaying articles or goods including clothing goods in superstores or hypermarkets through the use of the ILT RFID application. | 04-21-2011 |
| 20110096883 | SYMBOL SYNCHRONIZATION APPARATUS AND METHOD OF PASSIVE RFID READER - Provided is a symbol synchronization apparatus and method of a passive REID reader. The symbol synchronization apparatus includes: an edge clock detector generating edge clocks by detecting phase inversion positions of a received signal; a preamble detector detecting a preamble section by analyzing the generation times of the edge clocks; a symbol decision time extractor extracting a symbol decision time by averaging distances between the edge clocks consecutively generated in the preamble section, when the preamble section is detected; and a symbol decider deciding a symbol by analyzing the magnitude of the received signal, when the time reaches the symbol decision time. | 04-28-2011 |
| 20110136445 | RFID READER AND METHOD FOR SUPPRESSING TRANSMISSION LEAKAGE SIGNAL THEREOF - Provided are an RFID reader and a method for suppressing transmission leakage signals thereof. The RFID reader includes a first loop, a second loop, and a digital signal processor. The first loop suppresses a first transmission leakage signal of an RX signal in response to a first leakage control signal. The second loop suppresses a second transmission leakage signal of the RX signal, received through the first loop, in response to a second leakage control signal. The digital signal processor generates the first leakage control signal and the second leakage control signal. The digital signal processor generates the first leakage control signal until the level of the first transmission leakage signal becomes equal to or lower than the level of a first reference transmission leakage signal. | 06-09-2011 |
| 20110148585 | PASSIVE RFID SYSTEM AND METHOD - Disclosed are a passive RFID (Radio Frequency Identification) system and method capable of recognizing a great deal of tags at a high speed. A reader of a passive RFID system, including: a processor dividing slots and subchannels to configure a round, recognizing subchannels that are not involved in a collision and interference by the slots, and changing the subchannels that are not involved in a collision and interference, into a sleep state; a transmission unit encoding a command generated through the processor, performing an amplitude jitter modulation on the encoded command, and transmitting the modulated command; and a reception unit acquiring and demodulating tag signals received through a plurality of subchannels by the slots, and providing the demodulated tag signals to the processor. | 06-23-2011 |
| 20110148599 | RFID READER, RFID TAG, AND METHOD OF RECOGNIZING PLURALITY OF RFID TAGS - The RFID reader of an RFID system includes a processor for processing a command for the RFID tag and a response from the RFID tag, a modem for modulating the command from the processor or demodulating the response from the RFID, and an RF unit for transmitting the modulated command transferred from the modem to the RFID tag or receiving the response from the RFID tag and transferring the response to the modem. The RFID tag of the RFID system includes a power supply unit for generating energy using a radio wave received from the RFID reader, a receiver for demodulating a signal received from the RFID reader, a data processor for performing operation according to the signal demodulated by the receiver, and a transmitter for backscattering a signal from the data processor. | 06-23-2011 |
