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1.发明申请公开(公告)号：US20180356532A1
公开(公告)日：2018-12-13
申请号：US15777035
申请日：2016-11-18
Applicant: KOREA AEROSPACE RESEARCH INSTITUTE
Inventor： Sung Hyuck IM , Moon Beom HEO , Eun Sung LEE
CPC classification number: G01S19/42 , B64C39/02 , B64C39/024 , B64C2201/12 , G01S19/03 , H04W64/00
Abstract: An apparatus for determining a precise location including: a plurality of unmanned aerial vehicles each having a first broadband signal module and a global position system GPS receiver attached thereonto and flying in the air; and a terminal provided at a location and determining the location by communication with the first broadband signal modules. In addition, a method for determining a precise location including: respective GPS receivers receiving GPS signals from artificial satellites and detecting locations of each of the plurality of unmanned aerial vehicles, transmiting locations of the unmanned aerial vehicles and distances between the unmanned aerial vehicles and the terminal and determining a location of the terminal using information received from the first broadband signal modules.
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Patent Agency Ranking
公开(公告)号：US20210075466A1
公开(公告)日：2021-03-11
申请号：US16627749
申请日：2018-08-13
Applicant: KOREA AEROSPACE RESEARCH INSTITUTE
Inventor： Sung Hyuck IM , Se Bum CHUN , Moon Beom HEO
Abstract: The present invention relates to a device for operating a navigation satellite on the basis of a code division transmission array antenna and a method for operating a navigation satellite. The device for operating a navigation satellite on the basis of a code division transmission array antenna, according to the present invention, comprises: a code generation unit for allocating a spread spectrum code to each of a plurality of antennas; a determination unit for determining, as transmission-end antennas, at least some of the plurality of antennas, to which different spread spectrum codes are allocated; and a processing unit, which arranges each of the transmission-end antennas at predetermined coordinates such that a plurality of signals transmitted from the transmission-end antennas are transmitted to reception-end antennas through multiple paths.
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3.发明申请公开(公告)号：US20190011568A1
公开(公告)日：2019-01-10
申请号：US16065822
申请日：2016-12-21
Applicant: Korea Aerospace Research Institute
Inventor： Sung Hyuck IM , Moon Beom HEO , Eun Seong SON , Koon Tack KIM
Abstract: Disclosed are a multiple satellite navigation signal combining device, and a signal processing device comprising same. The multiple satellite navigation signal combining device comprises: a plurality of reception antennas for receiving satellite navigation signals from a satellite; a time delay unit for setting one satellite navigation signal, among the satellite navigation signals received by means of the reception antennas, as a reference satellite navigation signal and time-delaying other satellite navigation signals excluding the reference satellite navigation signal; and a signal combining device for combining the reference satellite navigation signal and other satellite navigation signals that have been time-delayed and transmitting same to a global navigation satellite system receiver.
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公开(公告)号：US20190011525A1
公开(公告)日：2019-01-10
申请号：US16065825
申请日：2016-12-21
Applicant: Korea Aerospace Research Institute
Inventor： Sung Hyuck IM , Moon Beom HEO , Se Bum CHUN , Deok Wo LIM , Eun Seong SON , Koon Tack KIM
Abstract: Provided is a radio source position estimation system including a plurality of radio transmission devices spaced a predetermined distance apart from one another and configured to transmit radio frequency (RF) signals received from an arbitrary radio source and a central radio reception device configured to estimate a position of the radio source using the RF signals received from at least three radio transmission devices.
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公开(公告)号：US20180143325A1
公开(公告)日：2018-05-24
申请号：US15819926
申请日：2017-11-21
Applicant: KOREA AEROSPACE RESEARCH INSTITUTE
Inventor： Jae Ik PARK , Eun Sung LEE , Moon Beom HEO , Gi Wook NAM
Abstract: A Global Positioning System (GPS) receiver, a control method of the GPS receiver, and a GPS system are provided, which are capable of reducing an initial position check time using an SBAS signal transmitted from a SBAS satellite. The control method of a GPS receiver includes receiving an SBAS signal from a SBAS satellite and calculating a satellite clock and a satellite position of the GPS receiver using the received SBAS signal. The SBAS signal may contain a difference value between the ephemeris data and the almanac data of the GPS satellite. The difference value between the ephemeris data and the almanac data may include a satellite clock difference value and a satellite position difference value for the GPS satellite. Accordingly, it is possible to acquire the current position and time information more quickly and accurately, by shortening the initial position check time using the difference value between the ephemeris data and the almanac data included in the SBAS signal.
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公开(公告)号：US20170184723A1
公开(公告)日：2017-06-29
申请号：US15342431
申请日：2016-11-03
Applicant: Korea Aerospace Research Institute
Inventor： Young Sun YUN , Eun Sung LEE , Moon Beom HEO , Gi Wook NAM
Abstract: Disclosed is a system for determining a protection level. The system includes a receiver configured to receive an error augmentation for a satellite orbit and clock error, an error augmentation for an ionospheric error, an error augmentation for noise and multi-path between a receiver and a satellite, and an error augmentation for a tropospheric error, a first calculator configured to calculate a first adjustment coefficient to be applied to the error augmentation for the satellite orbit and clock error and the error augmentation for the ionospheric error, and a second calculator configured to calculate a protection level by applying the first adjustment coefficient.
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