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公开(公告)号：US10931294B2
公开(公告)日：2021-02-23
申请号：US16925908
申请日：2020-07-10
发明人： Sang Won Kim , Dong Keun Lee , Jeung Min Joo , Jung Hoon Kim , Sung Jin Jo , Un Seob Jeong
摘要： Provided are an apparatus and a method for measuring a frequency of a broadband signal by using low-speed ADCs having sub-Nyquist sampling rates. A plurality of channels each including a low-speed ADC having a sub-Nyquist sampling rate (e.g. sampling frequency from several MHz to hundreds of MHz) are provided, and the frequency of an input signal corresponding to a combination of frequencies calculated through the respective channels is estimated. Therefore, as the number of channels increases, the range of measurable frequencies may be extended.
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公开(公告)号：US11977175B2
公开(公告)日：2024-05-07
申请号：US17480903
申请日：2021-09-21
发明人： Sang Won Kim , Dong Keun Lee , Jeung Min Joo , Jung Hoon Kim , Sung Jin Jo
CPC分类号： G01S5/0268 , G01S5/021 , G01S5/0244 , G01S5/0247 , G01S5/0295 , G01S5/06 , G01S2205/03 , G01S2205/07
摘要： Provided is a technology for increasing accuracy of position estimation by estimating a position of a signal source based on an error due to altitudes of a sensor and a signal source and an error due to a pitch of an aircraft as well as an error due to curvature of the earth. At this time, a position estimation method may include receiving measurement data from a plurality of sensors, estimating first position data of the signal source based on the measurement data, identifying an altitude error of the first position data, and estimating second position data that is data obtained by correcting the first position data based on the altitude error.
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