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公开(公告)号：US11815589B2
公开(公告)日：2023-11-14
申请号：US17006503
申请日：2020-08-28
Applicant: NXP B.V.
Inventor： Feike Guus Jansen , Francesco Laghezza , Saif Alhasson
IPC: G01S13/34 , G01S13/931 , H04B1/00 , H04B1/18 , H04B1/38
CPC classification number: G01S13/34 , G01S13/931 , H04B1/0064 , H04B1/18 , H04B1/38 , G01S2013/93271 , G01S2013/93275
Abstract: In imaging radar, examples are directed to uses of multiple sets of transmit antenna included with transceiver circuitry, for transmitting in a plurality of modes. Transmissions may involve having at least one transmit antenna, from each of at least two of the multiple sets, to transmit continuous-wave energy concurrently (simultaneously) in one or more of the plurality of different modes. Transceiver circuitry may include multiple receive antennas which may be receiving reflections of the continuous-wave energy from various targets. Signals from the multiple receive antennas may route to signal processing circuitry. The signal processing circuitry may respond to the received reflections of the continuous-wave energy by assessing differences in antenna gain and/or phase due to transmit antenna position associated with the received reflections. This signal processing assessment may mitigate or resolve at least one spatial ambiguity in at least one direction of arrival dimension associated with the received reflections.
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公开(公告)号：US20230251348A1
公开(公告)日：2023-08-10
申请号：US18081169
申请日：2022-12-14
Applicant: NXP B.V.
Inventor： Jeroen Overdevest , Francesco Laghezza
Abstract: A data processing device and method for detecting interference in FMCW radar signals, configured to use an adaptive thresholding technique to identify interference in a plurality of samples forming a beat signal, the adaptive thresholding including grouping the plurality of samples into a plurality of subsets, determining a maximum magnitude of each subset and extracting an nth lowest maximum magnitude of the plurality of subsets to determine an adaptive threshold, and applying the adaptive threshold to each sample to generate a mask.
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公开(公告)号：US20210341567A1
公开(公告)日：2021-11-04
申请号：US16865824
申请日：2020-05-04
Applicant: NXP B.V.
Inventor： Francesco Laghezza , Franz Lampel
IPC: G01S7/00 , G01S7/35 , G01S13/931
Abstract: A radar system is disclosed that provides joint object detection and communication capabilities. The radar system includes a communication signal generator that provides a communication signal, a pre-distortion module that applies a pre-distortion to the communication signal to provide a pre-distorted communication signal, a linear frequency modulation (LFM) signal generator that provides a LFM signal, and a mixer that mixes the pre-distorted communication signal onto the LFM signal to provide a radar signal to be transmitted by the radar system. The radar system further includes an all-pass filter that filters a plurality of de-ramped reflected images of the radar signal to provide a filtered signal. Each de-ramped reflected image includes an associated image of the pre-distorted communication signal. The all-pass filter provides a linear group delay, and a non-linear phase response. The pre-distortion is an inverse of the non-linear phase response of the all-pass filter.
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14.发明申请公开(公告)号：US20210132185A1
公开(公告)日：2021-05-06
申请号：US17083743
申请日：2020-10-29
Applicant: NXP B.V.
Inventor： Yu Lin , Francesco Laghezza
Abstract: Disclosed is a digital signal processing unit, for a frequency modulated continuous wave, FMCW, radar receiver module and configured to receive a digital in-phase signal and a digital quadrature signal and to provide an interference-suppressed signal, wherein the digital signal processing unit comprises: a processing subunit, configured to provide an an-band intermediate frequency, IF, signal and an image-band IF signal; an image-band processing unit configured to identify an interference window, estimate an interference crossing moment, and mirror the image band IF signal across the interference window about the interference crossing moment; and combinatorial logic configured to subtract the mirrored signal from the in-band IF signal. Related FMCW radar receiver modules and methods for interference suppression also disclosed
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公开(公告)号：US20200256948A1
公开(公告)日：2020-08-13
申请号：US16272083
申请日：2019-02-11
Applicant: NXP B.V.
Inventor： Feike Guus Jansen , Francesco Laghezza , Franz Lampel
Abstract: Aspects of the present disclosure are directed to a method and/or apparatus involving frequency modulated continuous wave (FMCW) radar signals. As my be implemented in accordance with one or more embodiments, receiver circuitry is configured and arranged to receive a FMCW radar signal having an information signal embedded into a radar waveform, and to indicate a relationship in the FMCW radar signal between beat frequency magnitude and time delay. A filter processing circuit is configured and arranged to filter the information signal in the FMCW radar signal by applying a group delay function based on the relationship between beat frequency magnitude and time delay. Signal processing circuitry is configured and arranged to detect a remote object by using the filtered FMCW radar signal.
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Patent Agency Ranking
公开(公告)号：US20200072941A1
公开(公告)日：2020-03-05
申请号：US16412693
申请日：2019-05-15
Applicant: NXP B.V.
Inventor： Feike Jansen , Francesco Laghezza
Abstract: A data processing device and method for detecting interference in a FMCW radar system are described. For each of a plurality of transmitted chirps of the radar system, a high pass filter is applied to a receiver signal of a receiver channel of a radar receiver during an acquisition time corresponding to a transmitted chirp to remove those parts of the receiver signal corresponding to a reflected chirp having a power at the radar receiver greater than the noise power of the radar receiver of the radar system. The receiver signal power is calculated from the high pass filtered receiver signal. The receiver signal power is compared with a threshold noise power based on an estimate of the thermal noise of the radar receiver to determine whether the receiver signal corresponds to an interfered received chirp including interference or a non-interfered received chirp not including interference.
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公开(公告)号：US20230280447A1
公开(公告)日：2023-09-07
申请号：US18174279
申请日：2023-02-24
Applicant: NXP B.V.
Inventor： Francesco Laghezza , Feike Guus Jansen
CPC classification number: G01S7/354 , G01S13/584 , G01S13/931
Abstract: In accordance with a first aspect of the present disclosure, a radar system is provided, comprising: a plurality of receive channels; a first radar detector stage configured to detect, through said receive channels, at least one target using a detector threshold; a noise correlation determination unit configured to determine a noise correlation level indicative of noise correlation between the receive channels if the first radar detector stage has detected the target; a detector threshold adjustment unit configured to adjust the detector threshold in dependence on the noise correlation level determined by the noise correlation determination unit; a second radar detector stage configured to detect the target using the adjusted detector threshold. In accordance with a second aspect of the present disclosure, a corresponding method of operating a radar system is conceived.
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公开(公告)号：US20230102833A1
公开(公告)日：2023-03-30
申请号：US17823288
申请日：2022-08-30
Applicant: NXP B.V.
Inventor： Jeroen Overdevest , Arie Geert Cornelis Koppelaar , Francesco Laghezza
Abstract: A method of processing radar signalling, the method comprising: receiving a mask (815) that represents samples in the radar signalling that are detected as including interference. The mask (815) comprises a matrix of data having a first dimension and a second dimension, wherein the first dimension represents a fast-time axis and the second dimension represents a slow-time axis. The method further comprises performing frequency analysis on the mask (815) across each of the fast-time axis and the slow-time axis of the mask in order to provide a range-Doppler processed mask (817); and deconvolving a range-Doppler map (813) of the received radar signalling using the range-Doppler processed mask (817) in order to provide a deconvolved-range-Doppler map (814).
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公开(公告)号：US11525908B2
公开(公告)日：2022-12-13
申请号：US16790319
申请日：2020-02-13
Applicant: NXP B.V.
Inventor： Francesco Laghezza , Feike Guus Jansen
IPC: G01S13/58 , G01S13/34 , G01S7/35 , G01S7/41 , G01S13/536
Abstract: Embodiments are directed to a method for determining velocity of an object. The method includes in response to two interleaved chirp sequences being sent towards the object, processing responsive chirps of each of the two interleaved chirp sequences independently from one another to produce respective Doppler-spectrum data sets, and calculating the velocity of the object based on the respective Doppler-spectrum data sets. Each of the interleaved chirp sequences being characterized by a common time spacing between respective chirps of the respective chirp sequence, and each chirp of one of the chirp sequences being offset by an amount of time that is different than the common time spacing.
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20.发明申请公开(公告)号：US20220283283A1
公开(公告)日：2022-09-08
申请号：US17190222
申请日：2021-03-02
Applicant: NXP B.V.
Inventor： Arie Geert Cornelis Koppelaar , Yiting Lu , Francesco Laghezza , Feike Guus Jansen
IPC: G01S13/44
Abstract: A mechanism is provided for determining an unambiguous direction of arrival (DoA) for radio frequency (RF) signals received by a sparse array. A DoA angle domain is split into hypothesis regions. The hypothesis regions are derived from the phase differences of the antenna element pairs used for the DoA angle estimate. In each hypothesis region, the ambiguous phase of antenna element pairs is unwrapped according to expected wrap-around. After unwrapping the phase, for each hypothesis region, a phasor is calculated by combining the individual antenna element pair phasors. The hypothesis region that obtains the phasor with a largest amplitude is selected as the most likely DoA region and the phase of the winning phasor is used as an unambiguous estimate for the DoA angle.
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