摘要:
Real-time location tracking apparatus and method using a global positioning system (GPS) signal relay tag is provided. Here, a tag may receive a GPS signal and transmit the received GPS signal to a reader, and the reader may calculate a location of the tag, and thereby a real-time location tracking service may be provided.
摘要:
To track the location of a terminal in an indoor space by using a pseudo GPS signal transmitter, a GPS signal sent from an artificial satellite is received, and a clock signal of the artificial satellite is extracted from the received GPS signal to perform synchronization with the artificial satellite. Once synchronization with the artificial satellite is performed, a pseudo GPS signal is generated, and the transmission time of the pseudo GPS signal is controlled. The GPS signal is sent to the terminal located in the indoor space by a plurality of transmitting antennas based on the controlled transmission time, thereby enabling the terminal located in the indoor space to track its location.
摘要:
A total history management system using a radio frequency identification (RFID) tag and a barcode. The system includes an RFID tag, a barcode recorder and a barcode reader. The RFID tag is attached to a box containing a plurality of individual products to store an environmental history of a distribution. The barcode recorder is configured to provide, to each of the plurality of individual products, a barcode in which identification (ID) information of the RFID tag is recorded. The barcode reader is configured to recognize the barcode attached to each of the plurality of individual products, and to output the environmental history of the distribution, corresponding to the ID information of the RFID tag that is received in response to a query with respect to the RFID tag, using the recognized barcode.
摘要:
An apparatus and method of generating a pseudo noise (PN) code is provided. The apparatus for generating the PN code includes: a memory device unit including a plurality of memory devices; an exclusive-OR (XOR) operation unit receiving output values of at least two memory devices among output values of the plurality of memory devices to output an XOR operation value with respect to the received output values; and a PN code generation unit generating the PN code based on an output value of the XOR operation unit.
摘要:
An apparatus and method of generating a pseudo noise (PN) code is provided. The apparatus for generating the PN code includes: a memory device unit including a plurality of memory devices; an exclusive-OR (XOR) operation unit receiving output values of at least two memory devices among output values of the plurality of memory devices to output an XOR operation value with respect to the received output values; and a PN code generation unit generating the PN code based on an output value of the XOR operation unit.
摘要:
Provided are a real-time locating systems, a reader, an RFID tag and a driving method of the RFID tag for locating. The locating system includes an RFID tag, a plurality of readers, and a location processor. The RFID tag outputs a first or second transmission message frame according to whether value added information exists. The readers are disposed at different locations, receive and analyze the first or second transmission message frame to transmit extracted information and reception time information corresponding to the extracted information to a location processor. The location processor analyzes the information which is extracted through the readers and the reception time information to calculate location information or the value added information related to the RFID tag.
摘要:
A method of tracking a position of a transmitting apparatus in a sensor network is provided. The transmitting apparatus may receive Global Positioning System (GPS) information from each of satellites, may extract satellite time information and satellite identification information from the GPS information, may generate a transmission frame together with receiving time information and apparatus identification information, and may transmit the transmission frame to a receiving apparatus.
摘要:
Provided are a receiver for a real time locating system (RTLS) and a method of receiving a signal in the RTLS. The receiver includes a down converter converting a radio frequency (RF) signal into a base band signal, a matched filter filtering the converted signal using an optimal receiving filter in view of a signal-to-noise ratio (SNR) such as a shaping filter used for a transmitter, an adaptive transversal filter (ATF) estimating an interference signal with an output of the matched filter, and filtering the output to remove interference of a heterogeneous signal of the same frequency band, a de-spreader multiplying an output of the matched filter and a code according to DSSS modulation used for spreading when a tag signal is modulated, and performing chip-matched filtering to obtain a value of correlation energy, and a detector detecting original transmission data using the correlation energy value.