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公开(公告)号：US12007467B2
公开(公告)日：2024-06-11
申请号：US17510780
申请日：2021-10-26
发明人： Byung Kwon Park , Sang Ho Nam
IPC分类号： G01S13/524 , G01S7/35 , G01S13/32 , G01S13/931
CPC分类号： G01S13/524 , G01S7/356 , G01S13/32 , G01S13/931
摘要： A multiple-input multiple-output (MIMO) radar system, including: a plurality of transmit channels configured to sequentially transmit signals with transmit-channel-designated Doppler division multiplexing (DDM) modulations; and processing circuitry configured to: determine, for each of the transmit channels, an impulse response of phase modulation errors due to DDM coupling of the respective transmit channel from each of the other transmit channels; and generate, based on the impulse response, a reconstruction matrix of modulation DDM coupling factors.
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公开(公告)号：US12019142B2
公开(公告)日：2024-06-25
申请号：US17874797
申请日：2022-07-27
发明人： Sang Ho Nam , Mohit Berry , Byung Kwon Park
IPC分类号： G01S13/536 , G01S7/35 , G01S13/34 , G01S13/931
CPC分类号： G01S13/536 , G01S7/35 , G01S13/343 , G01S13/931 , G01S7/356
摘要： A radar system includes first, second, and third transmitter branches. The first transmitter branch transmits a first frequency-modulated continuous wave (FMCW) signal having a first set of chirps having a first phase setting such that phase values of consecutive chirps differ by a first phase difference. The second transmitter branch transmits a second FMCW signal having a second set of chirps having a second phase setting such that phase values of consecutive chirps differ by a second phase difference. The third transmitter branch transmits a third FMCW signal having a third set of chirps having a third phase setting such that phase values of consecutive chirps differ by a third phase difference. The first phase difference, the second phase difference, and the third phase difference are different phase differences. The first phase difference, the second phase difference, and the third phase difference are asymmetrically distributed relative to each other.
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公开(公告)号：US11906618B2
公开(公告)日：2024-02-20
申请号：US17233715
申请日：2021-04-19
发明人： Byung Kwon Park , Sang Ho Nam
CPC分类号： G01S13/584 , G01S7/352
摘要： The present disclosure relates to a hybrid multiple-input multiple-output (MIMO) radar concept. Via a first subset of a plurality of transmit channels and during a first time interval, first frequency-modulated continuous-wave (FMCW) radar signals are con-currently transmitted with different phase offsets among different transmit channels of the first subset in accordance with a first predefined code division multiplexing scheme. Via a second subset of the transmit channels and during a second time interval subsequent to the first time interval, second FMCW radar signals are concurrently transmitted with different phase offsets among different transmit channels of the second subset in accordance with a second predefined code division multiplexing scheme.
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公开(公告)号：US20230129203A1
公开(公告)日：2023-04-27
申请号：US17510780
申请日：2021-10-26
发明人： Byung Kwon Park , Sang Ho Nam
IPC分类号： G01S13/524 , G01S13/32 , G01S7/35
摘要： A multiple-input multiple-output (MIMO) radar system, including: a plurality of transmit channels configured to sequentially transmit signals with transmit-channel-designated Doppler division multiplexing (DDM) modulations; and processing circuitry configured to: determine, for each of the transmit channels, an impulse response of phase modulation errors due to DDM coupling of the respective transmit channel from each of the other transmit channels; and generate, based on the impulse response, a reconstruction matrix of modulation DDM coupling factors.
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公开(公告)号：US11428796B2
公开(公告)日：2022-08-30
申请号：US16564213
申请日：2019-09-09
发明人： Sang Ho Nam , Mohit Berry , Byung Kwon Park
IPC分类号： G01S13/34 , G01S13/536 , G01S13/931 , G01S7/35
摘要： A radar system and a method for detecting a target using the radar system. The radar system includes a waveform generator, a plurality of phase shifters, at least one mixer, an analog-to-digital converter, a fast Fourier transform (FFT) processor, and a processor. The waveform generator generates a frequency-modulated continuous wave (FMCW) signal including a set of chirps repeated for a predetermined number of times. The phase shifters shift a phase of each chirp on a transmit branch. The phases transmitted via first and second transmit branches are shifted in accordance with first and second sets of regularly spaced phases, respectively. The first and second sets of regularly spaced phases have first and second phase differences, respectively, that are different from each other. The FFT processor performs FFT processing and the processor determines an angle of direction of the target based on range Doppler map bins.
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公开(公告)号：US20200081110A1
公开(公告)日：2020-03-12
申请号：US16564213
申请日：2019-09-09
发明人： Sang Ho Nam , Mohit Berry , Byung Kown Park
IPC分类号： G01S13/536 , G01S13/93 , G01S7/35 , G01S13/34
摘要： A radar system and a method for detecting a target using the radar system. The radar system includes a waveform generator, a plurality of phase shifters, at least one mixer, an analog-to-digital converter, a fast Fourier transform (FFT) processor, and a processor. The waveform generator generates a frequency-modulated continuous wave (FMCW) signal including a set of chirps repeated for a predetermined number of times. The phase shifters shift a phase of each chirp on a transmit branch. The phases transmitted via first and second transmit branches are shifted in accordance with first and second sets of regularly spaced phases, respectively. The first and second sets of regularly spaced phases have first and second phase differences, respectively, that are different from each other. The FFT processor performs FFT processing and the processor determines an angle of direction of the target based on range Doppler map bins.
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