Abstract: A transmitter of an apparatus position in a moving body transmits a first move command signal for moving a radio frequency identification tag to a location within an identification distance to a receiver positioned within a communication distance. A radio frequency identification reader of the moving body transmits an information request signal to the radio frequency identification tag that moves from a first location to a second location corresponding to a location within an identification distance in accordance with a first move command signal and receives a response signal corresponding to the information request signal from the radio frequency identification tag.

Abstract: The present invention relates to a terminal and a terminal location providing method. The terminal for selectively accessing a plurality of base stations supporting different communication systems includes a first network interface card that is turned on when the terminal is turned on, a second network interface card that is turned on or activated when receiving the terminal's location information request, a power controller for controlling power of the first and second network interface cards, and a processor for receiving the terminal's location information request and controlling the power of the first and second network interface cards through the power controller.

Abstract: An apparatus for determining a position of a terminal calculates distances between a terminal and a plurality of base stations by using time information acquired by a reference station among the plurality of base stations through unidirectional communication between the terminal and the base stations and between the base stations, and determines a position of the terminal by using the calculated distances.

Abstract: Provided is a fingerprint database generating method and device for wireless location. Signal strength is estimated by using access points on a numerical map, position coordinates of grid points, and a radio wave attenuation model so as to generate a fingerprint database. A simulation error is computed based on actual survey data measured in the real space, and the estimated signal strength is corrected by using the computed simulation error to thus generate a fingerprint database.

Abstract: A radar tracking apparatus and method are provided. The radar tracking apparatus includes an ?-? tracking filter, wherein the ?-? tracking filter includes: a tracking index unit calculating a tracking index for obtaining ? and ? filter gains of an ?-? tracking filter, based on changes in the measurement error covariance of a radar-measured value that occur when the measured value of target is converted from a polar coordinate system to a rectangular coordinate system; and a filter gain update unit calculating the variations of ? and ? filter gains, based on the partial differential coefficient of the changing rate of the ? and ? filter gains with respect to the changing rate of the tracking index and the variations of the tracking index, and updating the ? and ? filter gains.

Abstract: Provided is a channel estimation method and device in a wireless communication system. A channel estimating device for estimating a channel based on a received signal generates an initial channel estimate by using a preamble extracted from the received signal, and determines whether there is a midamble between data symbols appearing next to the preamble. When there is a midamble, the channel estimating device acquires a first channel estimate by using the midamble, and acquires an updated second channel estimate by using the initial channel estimate and the first channel estimate. The channel estimating device performs channel equalization with the second channel estimate to compensate distortion.

Abstract: Provided are an integrated navigation apparatus and a method for providing navigation information using the same. The integrated navigation apparatus includes a first filter, a second filter, a mode probability updating unit, a first navigation information calculating unit, a second navigation information calculating unit, a fusion unit and a navigation information fusion unit.

Abstract: Provided is an indoor wireless positioning system and method including: a signal receiving unit receiving first signals from wireless communication access points and measuring strengths of the received first signals and a position estimating unit estimating a current position by comparing the strengths of the first signals measured by the signal receiving unit with a table recording strengths of second signals predicted by a simulation for indoor space the system is currently positioned. Accordingly, it is possible to rapidly and accurately create a fingerprint database and calculate position information on the terminal in the terminal or the server on the basis of the database information.

Abstract: A method and apparatus for acquiring a refined carrier frequency by optimizing search areas are provided. The apparatus for acquiring a refined carrier frequency by optimizing search areas includes: a refined signal generation unit using a coarse carrier frequency and a coarse code phase extracted from a digitized signal and obtaining a refined carrier frequency approximated to the carrier frequency of an original signal from which the digitized signal is obtained by conversion; and a refined carrier frequency searching unit setting and providing a search area in which the refined signal acquisition unit can obtain the refined carrier frequency based on the coarse carrier frequency. According to the method and apparatus, as a result of the searching method reducing a search time, acquisition of a refined carrier frequency as well as fast acquisition of a signal is enabled, thereby allowing a precise initial value to be provided to a signal tracking unit.

Abstract: Provided is a method for estimating a position of a mobile terminal in a wireless network. In the method according to the present invention, difference values between squared signal arrival times of base stations are used to estimate the position of the mobile terminal.

Abstract: A method for a first mobile station to transmit a safety message to a second mobile station is provided. The first mobile station competitively transmits a non-safety message to the second mobile station during a first period. The first mobile station spreads a safety message and generates a spread message when a second period starts, and transmits the spread message to the second mobile station. Accordingly, safety message transmission delay or data loss in the inter-vehicle communication can be prevented.

Abstract: An apparatus for providing vehicle accident information periodically collects vehicle travel information, and stores vehicle travel information that is collected during an accident of a vehicle, in a vehicle black box. The apparatus for providing vehicle accident information collects information about other vehicles through communication with the other vehicles during the accident of the vehicle, and stores the collected information in the vehicle black box. Since the information about the other vehicles is collected through communication with the other vehicles as described above, it is possible to provide more accurate and efficient information required for dealing with the accident. In addition, vehicle accident information, which includes time when an accident occurs, location where an accident occurs, and the type of accident, is transmitted to a related agency such as a police station and a traffic center, so that it is possible to quickly deal with the accident.

Abstract: A method for setting a destination based on an identifier of a moving object and a method for providing position information are disclosed. In accordance with an aspect of the present invention, there is provided a method for setting a destination based on an identifier of a moving object, including the steps of: a) selecting an identifier of moving object; b) requesting the providing of position information providing to the selected moving object; c) receiving the position information from the selected moving object; and d) setting a destination for the moving object based on the received position information.

Abstract: A bidirectional positioning system is disclosed.