Patent application number | Description | Published |
20100014673 | RADIO FREQUENCY IDENTIFICATION (RFID) AUTHENTICATION APPARATUS HAVING AUTHENTICATION FUNCTION AND METHOD THEREOF - Disclosed are an RFID authentication apparatus having an authentication function and a method thereof. An RFID authentication method includes determining, by an authentication reader, an AES key using authentication information received from an authentication tag, generating an output key, encrypting a predetermined length of confirmation data by using the output key, transmitting the encrypted confirmation data to the authentication tag, receiving encrypted confirm response data corresponding to the confirmation data from the authentication tag to decrypt the encrypted confirm response data, and comparing the predetermined length of the confirmation data with the decrypted confirm response data to verify authenticity of the authentication tag. | 01-21-2010 |
20110037568 | RFID READER, RFID TAG, AND CONTROLLING METHOD THEREOF - Disclosed are an RFID reader, an RFID tag, and a controlling method thereof. The RFID tag may include a state information generator to generate state information of the RFID tag, a receiver to receive an activation command including reference state information of the RFID tag, and a controller to activate the RFID tag based on the state information and the reference state information. The RFID tag may be selectively activated according to an inner state of the RFID tag. | 02-17-2011 |
20110215908 | RADIO SECURITY LEADER CONTROLLING OPERATION MODE, AND RADIO SECURITY TAG SUPPORTING SECURITY MODE AND NORMAL MODE - Disclosed are a radio secure reader and a radio secure tag for supporting a secure mode and a normal mode. The radio secure reader for controlling an operation mode of the radio secure tag may include a reader modem to receive the operation mode from the radio secure tag, and a reader processing unit to identify the received operation mode as a normal mode or a secure mode, and to control the radio secure tag based on the identified operation mode. | 09-08-2011 |
20130265893 | APPARATUS FOR ANALYZING INTERFERENCE OF WIRELESS COMMUNICATION DEVICE, AND SYSTEM AND METHOD FOR ANALYZING INTERFERENCE USING THE SAME - An apparatus for analyzing interference of a wireless communication device includes a frequency detector configured to detect a frequency signal in a low frequency band that is generated in a wireless communication device; and a band-pass filter configured to extract an interference signal reflecting auditory sensitivity at each frequency, in an audible frequency band of the detected frequency signal. Further, the apparatus includes a voltmeter configured to measure a magnitude of the extracted interference signal at each frequency; and an interference determination block configured to determine whether there is an influence of interference of the wireless communication device on an audio device by comparing an interference level of the measured interference signal with a preset interference reference value. | 10-10-2013 |
20130278305 | SEMICONDUCTOR WAFER AND METHOD FOR AUTO-CALIBRATING INTEGRATED CIRCUIT CHIPS AT WAFER LEVEL - In integrated circuit chips that are used for RFID, a method of calibrating an operation frequency that is generated in an operation frequency generator and a semiconductor wafer including a calibration circuit are provided. The method of calibrating an operation frequency of integrated circuit chips includes: supplying DC power to the integrated circuit chips; selecting an integrated circuit chip to perform calibration of an operation frequency; receiving an operation frequency that is generated in the selected integrated circuit chip; generating a frequency calibration value by comparing the operation frequency with a calibration target frequency; transmitting a control signal including the frequency calibration value to the integrated circuit chip; and releasing a selection of the integrated circuit chip in which calibration of the operation frequency is complete. | 10-24-2013 |
20130278309 | SEMICONDUCTOR WAFER AND METHOD FOR AUTO-CALIBRATING INTEGRATED CIRCUIT CHIPS USING PLL AT WAFER LEVEL - In integrated circuit chips that are used for RFID, a method of calibrating an operation frequency that is generated in an operation frequency generator and a semiconductor wafer including a calibration circuit are provided. The method of calibrating an operation frequency of integrated circuit chips includes: supplying DC power to the integrated circuit chips; selecting an integrated circuit chip to perform calibration of an operation frequency; receiving an operation frequency that is generated in the selected integrated circuit chip; calculating a difference between a phase of the operation frequency and a phase of a calibration target frequency; generating a frequency calibration value of the operation frequency using the phase difference; transmitting a control signal including the frequency calibration value to the integrated circuit chip; and releasing a selection of the integrated circuit chip in which calibration of the operation frequency is complete. | 10-24-2013 |
20140148113 | APPARATUS AND METHOD FOR EVALUATING STATISTICAL INTERFERENCE CONCERNING MULTI-SOURCE NOISE ENVIRONMENT OF ELECTROMAGNETIC ZONE - An apparatus and method for evaluating statistical interference concerning a multi-source noise environment of an electromagnetic (EM) zone are disclosed. The apparatus for evaluating statistical interference may include a receiver to receive an EM wave in a preset frequency band, a spectrum analyzer to analyze the received EM wave and to measure interference in the preset frequency band, a frequency selector to select an interest frequency in the frequency band based on a level of the measured interference, an amplitude probability distribution (APD) measurement unit to measure an APD of an interference signal with respect to the interest frequency, and a comparator to compare the measured APD to a preset limit and to draw a probability of the limit or higher of interference occurring. | 05-29-2014 |
20140314185 | METHOD AND APPARATUS FOR IMPULSIVE NOISE MITIGATION USING ADAPTIVE BLANKER BASED ON BPSK MODULATION SYSTEM - A method for impulsive noise mitigation using an adaptive blanker based on BPSK modulation system includes estimating narrowband Middleton parameters of impulsive noise from signals received for a fixed time period; calculating a threshold using the estimated narrowband Middleton parameters; operating the first blanker to suppress impulsive noise from the signal received at a given point of time through the comparison of the SNR value of the received signal and the threshold. Further, the method includes operating the second blanker to suppress impulsive noise from the received signal through the comparison of the summation of the threshold and the SNR value with an absolute value of the received signal, when the SNR value is above the threshold. | 10-23-2014 |