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公开(公告)号：US20180231656A1
公开(公告)日：2018-08-16
申请号：US15892865
申请日：2018-02-09
Applicant: UHNDER, INC.
Inventor： Monier Maher , Jean Pierre Bordes , Wayne E. Stark , Raghunath Krishna Rao , Frederick Rush , Curtis Davis , Srikanth Gollapudi , Steve Borho , Murtaza Ali
Abstract: A radar sensing system for a vehicle has multiple transmitters and receivers on a vehicle. The transmitters are configured to transmit radio signals which are reflected off of objects in the environment. There are one or more receivers that receive the reflected radio signals. Each receiver has an antenna, a radio frequency front end, an analog-to-digital converter (ADC), and a digital signal processor. The transmitted signals are based on spreading codes generated by a programmable code generation unit. The receiver also makes use of the spreading codes generated by the programmable code generation unit. The programmable code generation unit is configured to selectively generate particular spreading codes that have desired properties.
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公开(公告)号：US09971020B1
公开(公告)日：2018-05-15
申请号：US15892764
申请日：2018-02-09
Applicant: UHNDER, INC.
Inventor： Monier Maher , Curtis Davis , Frederick Rush , Aria Eshraghi
CPC classification number: G01S13/931 , G01S7/032 , G01S7/285 , G01S7/352 , G01S7/354 , G01S7/4017 , G01S7/4021 , G01S13/06 , G01S13/325 , G01S13/34 , G01S13/42 , G01S13/584 , G01S13/64 , G01S13/87 , G01S13/878 , G01S2013/9375 , G01S2013/9378 , G01S2013/9385 , G06F7/724 , G11C11/409
Abstract: A radar system includes transmitters and receivers configured for installation and use in a vehicle. The transmitters transmit radio signals. The receivers receive radio signals that include the transmitted radio signals reflected from objects in an environment. Each receiver has an RF front end, an analog-to-digital converter (ADC), a digital signal processor, and a controller. The digital signal processor processes the data from the ADC and stores data samples in a buffer. The buffer operates in several modes defined by the controller. These modes include replay mode, loopback mode, quiet mode, and throttle mode. By controlling the buffer, the same received samples can be processed in multiple ways to generate information on targets at different ranges and velocities. The buffer is read out and the data is processed further to enable the radar system to determine range, velocity, and angle of targets in the environment.
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公开(公告)号：US20170307729A1
公开(公告)日：2017-10-26
申请号：US15496314
申请日：2017-04-25
Applicant: UHNDER, INC.
Inventor： Aria Eshraghi , Jean P. Bordes , Curtis Davis , Raghunath K. Rao , Murtaza Ali , Paul W. Dent
CPC classification number: G01S7/354 , G01S7/038 , G01S7/292 , G01S7/4021 , G01S13/347 , G01S13/87 , G01S13/931 , G01S2007/358 , G01S2013/9375 , G01S2013/9378
Abstract: A digital FMCW radar is described that simultaneously transmits and receives digitally frequency modulated signals using multiple transmitters and multiple receivers and associated antennas. Several sources of nearby spillover from transmitters to receivers that would otherwise degrade receiver performance are subtracted by a cancellation system in the analog radio frequency domain that adaptively synthesizes an analog subtraction signal based on residual spillover measured by a correlator operating in the receivers' digital signal processing domains and based on knowledge of the transmitted waveforms. The first adaptive cancellation system achieves a sufficient reduction of transmit-receive spillover to avoid receiver saturation or other non-linear effects, but is then added back in to the signal path in the digital domain after analog-to-digital conversion so that spillover cancellation can also operate in the digital signal processing domain to remove deleterious spillover components.
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64.发明申请公开(公告)号：US20170307728A1
公开(公告)日：2017-10-26
申请号：US15492159
申请日：2017-04-20
Applicant: UHNDER, INC.
Inventor： Aria Eshraghi , Curtis Davis , Murtaza Ali , Paul Dent
CPC classification number: G01S7/352 , G01S7/282 , G01S13/325 , G01S13/87 , G01S13/931 , G01S2007/358 , G01S2013/936 , G01S2013/9375 , G01S2013/9378
Abstract: A radar system for a vehicle includes a transmitter and a receiver. The transmitter transmits an amplified and frequency modulated radio signal. Each transmitter comprises a frequency generator, a code generator, a modulator, a constant-envelope power amplifier, and an antenna. The frequency generator generates the radio signal with a desired center frequency. The code generator generates a sequence of chips at a selected chiprate. A modulation interval between successive chips is a reciprocal of the chiprate. The modulator frequency modulates the radio signal using shaped frequency pulses. The shaped frequency pulses correspond to a first signal, the frequency of which deviates from the desired center frequency during each of the modulation intervals according to a selected pulse shape. The selected pulse shape is determined by the generated sequence of chips. The constant-envelope power amplifier amplifies the frequency modulated radio signal at a desired transmit power level. The antenna transmits the radio signal.
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公开(公告)号：US09791564B1
公开(公告)日：2017-10-17
申请号：US15492160
申请日：2017-04-20
Applicant: UHNDER, INC.
Inventor： Fred Harris , David Trager , Curtis Davis , Raghunath K. Rao
CPC classification number: G01S13/931 , G01S7/023 , G01S13/325 , G01S13/34 , G01S13/36 , G01S13/93 , G01S2007/356 , G01S2013/9375 , G01S2013/9378
Abstract: A radar sensing system for a vehicle includes a transmitter configured for installation and use on a vehicle and able to transmit radio signals. The radar sensing system also includes a receiver and a processor. The receiver is configured for installation and use on the vehicle and able to receive radio signals. The received radio signals include transmitted radio signals that are reflected from objects in the environment. The received radio signals further include radio signals transmitted by at least one other radar system. The processor samples the received radio signals to produce a sampled stream. The processor is configured to control an adaptive filter. Responsive to the processor, the adaptive filter is configured to filter the sampled stream, such that the radio signals transmitted by the at least one other radar system are removed from the received radio signals.
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Patent Agency Ranking
公开(公告)号：US09599702B1
公开(公告)日：2017-03-21
申请号：US15204002
申请日：2016-07-07
Applicant: UHNDER, INC.
Inventor： Jean P. Bordes , Raghunath K. Rao , Monier Maher
CPC classification number: G01S13/50 , G01S7/354 , G01S13/18 , G01S13/325 , G01S13/36 , G01S13/931 , G01S2007/356 , G01S2013/9375 , G01S2013/9378 , G01S2013/9385 , G01S2013/9392
Abstract: A radar sensing system for a vehicle includes a transmitter, a receiver, a memory, and a processor. The transmitter transmits a radio signal and the receiver receives a reflected radio signal. The processor samples reflected radio signals during a plurality of time slices. The processor produces samples by correlating reflected radio signals to time-delayed replicas of transmitted radio signals. The processor accumulates the time slices into a first radar data cube and stores the first radar data cube in a memory. The processor combines a portion of the first radar data cube with a portion of a previously stored radar data cube. Based at least in part on the combined portions of the radar data cubes, the processor processes a time series that is a time series of the first radar data cube concatenated with a time series from the previously stored radar data cube.
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公开(公告)号：US20230243964A1
公开(公告)日：2023-08-03
申请号：US18191101
申请日：2023-03-28
Applicant: UHNDER, INC.
Inventor： Curtis Davis , Monier Maher , Jean P. Bordes , Manju Hegde , Otto A. Schmid , Raghunath K. Rao , Marius Goldenberg , Aria Eshraghi , Vito Giannini , David S. Trager , Nikhilesh Bhagat , Srikanth Gollapudi , Sundar Govindarajan , Steve Borho , Jonathan Preussner , Paul W. Dent , Paul Bassett , Stephen W. Alland , Fred Harris , Wayne E. Stark , Murtaza Ali
IPC: G01S13/931 , G01S7/02 , G01S13/32
CPC classification number: G01S13/931 , G01S7/023 , G01S13/32 , G01S7/0233 , G01S7/0234 , G01S2013/9316 , G01S2013/9322 , G01S2013/9323 , G01S2013/9324
Abstract: A method for operating a radar sensing system includes configuring a transmitter to transmit a radio signal. A receiver is configured to receive radio signals. The received radio signals include the transmitted radio signal transmitted by the transmitter and reflected from objects in the environment. The method includes with advanced temporal knowledge of the codes used to modulate the transmitted radio signal, using code values of the plurality of codes, and in combination with a bank of digital finite impulse response (FIR) filters, generating complementary signals of any self-interference noise. The method further includes subtracting the complementary signals at one or more points in the receiver prior to the interference desensing the receiver. The radar sensing system further includes a frequency modulated continuous wave (FMCW) interference canceller for detecting the largest interference signals and sequentially cancelling them while signal processing the received radio signals.
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公开(公告)号：US20230176179A1
公开(公告)日：2023-06-08
申请号：US18060158
申请日：2022-11-30
Applicant: UHNDER, INC.
Inventor： Andrew Graff , Lun Chen , Murtaza Ali , Jingning Tang , Suleyman Gokhun Tanyer , Paul W. Dent
CPC classification number: G01S7/2927 , G01S7/354 , G01S2013/0245
Abstract: A radar system with enhanced processing for increased contrast ratio, improved angular separability and accuracy, and elimination of ghost targets. The radar system is equipped with transmitters, receivers, pluralities of transmit antennas, and pluralities of receive antennas. The enhanced processing chain on-board the radar system iteratively detects target(s) by first finding the strongest target, subtracting the estimated received signal from the detected target, and repeating the process for subsequent targets until a predefined number of iterations is completed or an exit condition is tripped. The enhanced processing chain's subtraction increases the contrast ratio of detectable targets. The detection is thus refined by determining optimal azimuth, elevation, gain, and phase of each detection through a joint optimization of all detections. The subtraction and refinement aid in eliminating ghost targets by removing sidelobe signals and residual errors that cause ghost targets to appear.
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公开(公告)号：US20230051731A1
公开(公告)日：2023-02-16
申请号：US17967189
申请日：2022-10-17
Applicant: Uhnder, INC.
Inventor： Paul W. Dent , Curtis Davis , Murtaza Ali
IPC: G01S13/10 , H01Q19/10 , G01S13/28 , H01Q1/32 , H01Q21/06 , G01S7/282 , G01S7/295 , G01S13/931 , G01S7/288
Abstract: A chip-implementation of a millimeter wave MIMO radar comprises transmitters for transmitting short bursts of digitally modulated radar carrier signals and receivers for receiving delayed echoes of those signals. Various signal formats defined by the number of bits per transmit burst, the transmit burst duration, the receive period duration, the bitrate, the number of range bins, and the number of bursts per scan, facilitate the choice of modulating bit patterns such that when correlating for target echoes over an entire scan, the correlation codes for different ranges and different transmitters are mutually orthogonal or nearly so as compared to a random selection of codes. In the event of imperfect orthogonality, the subtraction of strong already-detected target signals allows for better detecting of weaker signals or moving targets that are rendered non-orthogonal by their Doppler shift.
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公开(公告)号：US11474225B2
公开(公告)日：2022-10-18
申请号：US16674543
申请日：2019-11-05
Applicant: Uhnder, INC.
Inventor： Paul W. Dent , Curtis Davis , Murtaza Ali
IPC: G01S13/10 , H01Q21/06 , H01Q19/10 , G01S7/295 , G01S7/282 , H01Q1/32 , G01S13/28 , G01S7/288 , G01S13/931
Abstract: A chip-implementation of a millimeter wave MIMO radar comprises transmitters for transmitting short bursts of digitally modulated radar carrier signals and receivers for receiving delayed echoes of those signals. Various signal formats defined by the number of bits per transmit burst, the transmit burst duration, the receive period duration, the bitrate, the number of range bins, and the number of bursts per scan, facilitate the choice of modulating bit patterns such that when correlating for target echoes over an entire scan, the correlation codes for different ranges and different transmitters are mutually orthogonal or nearly so. In the event of imperfect orthogonality, simple orthogonalization schemes are revealed, such as subtraction of strong already-detected target signals for better detecting weaker signals or moving targets that are rendered non-orthogonal by their Doppler shift.
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