Patent application number | Description | Published |
20110074632 | WIRELESS POSITIONING METHOD AND APPARATUS - A wireless positioning method of a receiver is provided. Signals are received from a plurality of transmitters, propagation taps of the plurality of transmitters received from the plurality of transmitters are determined, respectively, the distance between the receiver and each of the transmitters is calculated, respectively, the weight of each of the transmitters is calculated by using each of the propagation delay tap, the distance is adjusted by using the weight of each of the transmitters, and an area, in which circles away by the adjusted distances between the receiver and each of the transmitters on the basis of each of the transmitters overlap with each other, is estimated as the location of the receiver. Thus, an error of wireless positioning according to a propagation environment can be reduced. | 03-31-2011 |
20110076975 | METHOD AND APPARATUS FOR WIRELESS LOCATION MEASUREMENT - A wireless location measurement method of a receiver includes: receiving signals from a transmitter for a plurality of time intervals; extracting a final propagation delay tab profile based on a plurality of signals that are received for the plurality of time intervals; and calculating a distance between the transmitter and the receiver by using the final propagation tab delay profile. A wireless location measurement apparatus includes: a receiver for receiving signals from a transmitter for a plurality of time intervals; an accumulator for accumulating the plurality of signals and outputting an accumulated signal; a propagation delay tab extractor for extracting a propagation delay tab profile of the accumulated signal; and a location measurer for measuring a location by using the propagation delay tab profile. | 03-31-2011 |
20110077007 | WIRELESS LOCATION MEASUREMENT METHOD - A method for a base station to search terminals broadcasts a search initiated message for notifying searching, receives a response message from a terminal having received the search initiated message, and determines whether the terminal having transmitted the response message is a search target. A method for a simplified base station installed in an event zone to perform a location measurement process with a terminal broadcasts a search initiated message for notifying searching to an event zone, and performs a location measurement process with a terminal having received the search initiated message. A method for a terminal to perform a location measurement process receives a search initiated message for notifying searching, and performs a location measurement process by using information included in the search initiated message. | 03-31-2011 |
20110090810 | METHOD FOR AQUIRING PROCESSING TIME OF WIRELESS SIGNAL - A base station resets a wireless signal processing time depending on the processing capability of a terminal, and determines the transmission position of a feedback signal for a data packet using the reset wireless signal processing time and transmits the same to the terminal. If the feedback signal indicates the success of reception of the data packet, the data packet can be processed using the reset wireless signal processing time, and the wireless signal processing time can be reset to a smaller value. | 04-21-2011 |
20110130152 | METHOD AND APPARATUS FOR WIRELESS LOCATION MEASUREMENT - A method for wireless location measurement of a receiver is provided. The method includes: estimating radio channels of a plurality of frequency domains respectively corresponding to a plurality of transmitters by using received signals from the plurality of transmitters; extracting a plurality of propagation delay tab profiles based on the radio channels of the plurality of frequency domains; calculating the distance between each of the transmitters corresponding to the respective propagation delay tab profiles and the receiver by using the propagation delay tab profiles; and estimating the location of the receiver by using the distance between each transmitter and the receiver. | 06-02-2011 |
20110171993 | WIRELESS POSITIONING METHOD, WIRELESS POSITIONING APPARATUS, AND MOBILE STATION - A wireless positioning apparatus receives a plurality of channel responses for a plurality of locations, generates a plurality of channel response patterns from the plurality of channel responses, and stores the plurality of channel response patterns. The wireless positioning apparatus receives an estimated channel response from a mobile station and compares the estimated channel response with the plurality of channel response patterns to estimate a location of the mobile station. The wireless positioning apparatus provides the estimated location information to the mobile station. | 07-14-2011 |
20110177777 | BASE STATION, REPEATER, AND OPERATING METHOD THEREOF - A base station provides information on a reference time to a repeater. The repeater determines a delay time based on a distance between the base station and the repeater, and determines an elapsed time of a delay time from the reference time as a transmission time. The base station transmits a positioning reference signal at the reference time. The repeater transmits a positioning reference signal at the transmission time. | 07-21-2011 |
20110183689 | APPARATUS AND METHOD FOR DETERMINING POSITION - Provided is a wireless position determining method and apparatus. The wireless position determining includes: a measuring unit that measures a propagation delay tap of a signal received from a transmitting end through a channel; and extractor that extracts delay spread information having various forms based on the propagation delay tap; and an obtaining and calculating unit that obtains a distance between transmission and reception ends based on the delay spread information and calculates a position of a receiving end based on the obtained distance between the transmission and reception ends. | 07-28-2011 |
20120184297 | WIRELESS LOCATION MEASUREMENT METHOD - A method for a receiving node to find a distance from a transmitting node and measure a location includes: measuring a delay tab by receiving a location measurement signal from the transmitting node, temporarily determining a distance between the receiving node and the transmitting node by using the delay tab to compare it with a reference distance, selecting one of a distance estimation method using propagation delay and a distance estimation method using delay spread, and estimating a final distance. | 07-19-2012 |
20120190383 | LOCATION MEASUREMENT METHOD - In a method for a terminal to measure a location by using a public safety monitoring system, when a public safety mode available for tracking a location while a terminal is turned off is set, the terminal acquires location measurement information and transmits it to the public safety monitoring system. In a method for measuring a location of a terminal to which plural stages of public safety modes are set, when a stage for performing a location measurement process is set, the terminal acquires location measurement information, transmits location measurement information to the public safety monitoring system, and enters the next stage when the public safety mode is not cancelled after a predetermined time. In a method for measuring a location of a terminal in a public safety monitoring system, a public safety mode setting request message including control information is transmitted to the terminal to which a public safety mode setting is requested, location measurement information is received from the terminal, and the location of the terminal is tracked. | 07-26-2012 |
20130288705 | WIRELESS LOCATION DETERMINATION APPARATUS AND METHOD USING WEIGHTED VALUE IN WIRELESS COMMUNICATION NETWORK - Disclosed is a wireless location determination apparatus using weighted values in a wireless communication network, including: a fixed infrastructure searching unit configured to search and accept information of nodes to be located and neighbor fixed infrastructures; an infrastructure combination generating unit configured to generate fixed infrastructure combinations to be used for location determination from the information of the fixed infrastructures; a location determination information element extracting unit configured to extract location determination information elements between the fixed infrastructures from each generated fixed infrastructure combination; a weighted value calculating unit configured to allocate the weighted values to each fixed infrastructure combination using the extracted location determination information elements; a fixed infrastructure combination selecting unit configured to select the fixed infrastructure combinations for location determination using the allocated weighted values; and a location calculating unit configured to calculate locations of the nodes to be located using the selected fixed infrastructure combinations. | 10-31-2013 |
20140064402 | APPARATUS AND METHOD FOR MODULATION CLASSIFICATION IN WIRELESS COMMUNICATION SYSTEM - An apparatus is used for modulation classification of unknown input signal in a wireless communication system. The apparatus includes a signal classification unit configured to classify the input signal into a PSK signal and an FSK signal and a modulation index decision unit configured to decide a modulation index for the PSK signal and the FSK signal classified by the signal classification unit. | 03-06-2014 |
20140125524 | METHOD AND APPARATUS FOR RADIO DIRECTION FINDING - An apparatus for radio direction finding, the apparatus comprising: a receiver configured to receive target signals to be subjected to the direction finding of signal sources, which are acquired by an antenna array; a channel profiler configured to produce profiles of the target signals received through the receiver; a pre-analyzer configured to preemptively process in a narrowband the wideband target signals based on the profiles that are produced by the channel profiler to produce pre-analyzed information for the wideband target signals; and a direction finder configured to perform the direction finding on the signal sources using the pre-analyzed information and the profilers of the target signals. | 05-08-2014 |