Patents by Inventor Udo SCHRODER
Udo SCHRODER has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11415664Abstract: A method for obtaining an adaptive angle-Doppler ambiguity function (AF) for a target using multiple-input-multiple-output (MIMO) radar that includes a transmit antenna array having a plurality of antenna elements. The method includes generating transmit signals for transmission by the transmit antenna array, the transmit signals defining at least a first transmit trajectory of a phase center within the transmit antenna array; transmitting the transmit signals using the transmit antenna array and receiving receive signals from the target, the receive signals resulting from the incidence of the transmit signals upon the target; and obtaining at least an angle-Doppler ambiguity function (AF) from the receive signals. The first transmit trajectory is such that, in operation, the phase center undergoes random phase center motion (PCM), such that a phase center position within the transmit antenna array varies randomly with time. A system for obtaining an AF is also disclosed.Type: GrantFiled: March 1, 2018Date of Patent: August 16, 2022Assignees: IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A., UNIVERSITE DU LUXEMBOURGInventors: Christian Hammes, Yogesh Nijsure, Bjorn Ottersten, Thiemo Spielmann, Bhavani Shankar Mysore Rama Rao, Udo Schroder
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METHOD AND SYSTEM FOR PROCESSING NEURAL NETWORK PREDICTIONS IN THE PRESENCE OF ADVERSE PERTURBATIONS
Publication number: 20220114445Abstract: A system and method for processing predictions in the presence of adversarial perturbations in a sensing system. The processor receives inputs from sensors and runs a neural network having a network function that generates, as outputs, predictions of the neural network. The method generates from a plurality of outputs a measurement quantity (m) that may be, at or near a given input, either (i) a first measurement quantity M1 corresponding to a gradient of the given output, (ii) a second measurement quantity M2 corresponding to a gradient of a predetermined objective function derived from a training process for the neural network, or (iii) a third measurement quantity M3 derived from a combination of M1, and M2. The method determines whether the measurement quantity (m) is equal to or greater than a threshold. If greater than the threshold, one or more remedial actions are performed to correct for a perturbation.Type: ApplicationFiled: January 3, 2020Publication date: April 14, 2022Inventors: Hans-Peter BEISE, Udo SCHRÖDER, Steve DIAS DA CRUZ, Jan SOKOLOWSKI -
Patent number: 11163055Abstract: An automotive spread MIMO-configured radar system has a plurality of transceiver antenna units for transmitting mutually orthogonal radar waves. Each transceiver antenna unit has a plurality of range gates to indicate a range detected by the transceiver antenna unit. At least one specific transceiver antenna unit (TRx1) is configured to transmit a reference signal received directly by at least one transceiver antenna unit (TRx2) that is separated by an a priori known distance from the specific transceiver antenna unit (TRx1). An evaluation and control unit is configured for reading out the plurality of range gates for the transceiver antenna unit (TRx2), and, based on the read-out range gate that indicates the received reference signal and based on the a priori known distance, for synchronizing the specific transceiver antenna unit (TRx1) and the transceiver antenna unit (TRx2) that received the reference signal and/or for correcting a measured Doppler shift.Type: GrantFiled: December 21, 2017Date of Patent: November 2, 2021Assignee: IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A.Inventors: Udo Schroder, Hans-Peter Beise, Thomas Stifter
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Patent number: 10908253Abstract: A method of operating an automotive radar system that includes a radar transmitter unit for transmitting radar waveforms towards a scene, a radar receiving unit for receiving radar waveforms that have been reflected by a target in the scene, and an evaluation and control unit for decoding range-Doppler information from the received waveforms. The method includes: transmitting a first sequence of radar waveforms (xTx) and a second sequence of radar waveforms ({tilde over (x)}Tx,k) towards the scene that differs from the first transmitted sequence of radar waveforms (xTx) by predetermined phase shifts (?k) such that each radar waveform ({tilde over (x)}Tx,k) of the second sequence has a different predetermined phase shift (?k). First range-Doppler information and second range-Doppler information are decoded. Deviations of the second range-Doppler information from the first range-Doppler information are compared to at least one predetermined deviation value.Type: GrantFiled: March 29, 2018Date of Patent: February 2, 2021Assignee: IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A.Inventors: Hans-Peter Beise, Udo Schroder, Thomas Stifter
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Patent number: 10884113Abstract: A method of direction of arrival estimation with an automotive spread radar system. The automotive spread radar system includes a plurality of at least two transceiver antenna units, which are configured to work in a MIMO configuration, wherein the transceiver antenna units are arranged at a priori known positions. The automotive spread radar system is configured to determine, for each transceiver unit antenna unit of the plurality of transceiver antenna units, a range of a target reflecting radar waves that have been transmitted by at least the specific transceiver antenna unit by reading out a plurality of range gates assigned to a specific transceiver antenna unit. The method and radar system are capable of estimating a direction of arrival without the need of ensuring a synchronization of antennas on the scale of a radar carrier frequency.Type: GrantFiled: December 7, 2017Date of Patent: January 5, 2021Assignee: IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A.Inventors: Udo Schroder, Hans Peter Beise, Thomas Stifter
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Publication number: 20200400808Abstract: A method of sensing a target in a target detection system having processing circuitry and a multiplexer coupled to the processing circuitry and to a plurality NT of transmit antennas forming a sparse transmit uniform linear array (ULA), the multiplexer being configured to generate multiplexed and phase modulated transmit signals (T1 . . . TNT) based on signals from a local oscillator. The processing circuitry receives signals via a plurality NR of receive antennas forming a dense receive ULA. The method includes transmitting the transmit signals via the transmit antennas as a general radiation pattern corresponding to a block circulant probing signal matrix, and receiving via the receive antennas receive signals resulting from backscattering of the transmit signals transmitted towards K targets. The method further includes processing the received reflection signals to determine the presence, range and/or angular position of a target within a field of view of the transmit antennas.Type: ApplicationFiled: March 8, 2019Publication date: December 24, 2020Inventors: Christian HAMMES, Bhavani Shankar MYSORE RAMA RAO, Björn OTTERSTEN, Udo SCHRÖDER
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Publication number: 20200386853Abstract: A method of operating an automotive radar system that includes a radar transmitter unit for transmitting radar waveforms towards a scene, a radar receiving unit for receiving radar waveforms that have been reflected by a target in the scene, and an evaluation and control unit for decoding range-Doppler information from the received waveforms. The method includes: transmitting a first sequence of radar waveforms (xTx) and a second sequence of radar waveforms ({tilde over (x)}Tx,k) towards the scene that differs from the first transmitted sequence of radar waveforms (xTx) by predetermined phase shifts (?k) such that each radar waveform ({tilde over (x)}Tx,k) of the second sequence has a different predetermined phase shift (?k). First range-Doppler information and second range-Doppler information are decoded. Deviations of the second range-Doppler information from the first range-Doppler information are compared to at least one predetermined deviation value.Type: ApplicationFiled: March 29, 2018Publication date: December 10, 2020Inventors: Hans-Peter BEISE, Udo SCHRODER, Thomas STIFTER
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Patent number: 10768291Abstract: A method for obtaining an angle-Doppler signature for a target using sparse arrays in multiple-input-multiple-output (MIMO) radar, the MIMO radar including a transmit antenna array, the transmit antenna array being at least one-dimensional (e.g. 2-D, 3-D or 4-D) and having a plurality of antenna elements. The method includes generating transmit signals for transmission by the transmit antenna array, the transmit signals defining at least a first transmit trajectory (e.g. circular) of a phase center within the transmit antenna array, and transmitting the transmit signals using Amplitude Modulation on the transmit antenna array. The method further includes receiving receive signals from the target, the receive signals resulting from the incidence of the transmit signals upon the target, and determining the angle-Doppler signature from the receive signals. The first transmit trajectory is such that, in operation, the phase center undergoes non-linear motion within the transmit antenna array.Type: GrantFiled: October 4, 2017Date of Patent: September 8, 2020Assignees: IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A., UNIVERSITE DU LUXEMBOURGInventors: Christian Hammes, Yogesh Nijsure, Bjorn Ottersten, Udo Schroder
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Patent number: 10768273Abstract: A method of orthogonal modulation of radar waves of a phase-modulated continuous wave radar system. The method includes selecting an equidistant bi-phased or multi-phased phase-modulation sequence, phase-modulating the continuous radar wave, and transmitting the orthogonal phase-modulated continuous radar wave towards a scene. The method includes generating a detection sequence (s) by applying an outer coding (H) to the phase-modulation sequence, selecting a communication range (C) in the complex number plane, based on the selected phase-modulation, generating a communication sequence (c) having a plurality of sequence members, mapping the communication sequence (c) into the communication range (C) by applying an injective mapping function (?) to the sequence members, and calculating a numerical product of members of the detection sequence (s) with members of an image of the mapped communication sequence (c).Type: GrantFiled: May 9, 2018Date of Patent: September 8, 2020Assignees: IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A., UNIVERSITE DU LUXEMBOURGInventors: Udo Schroder, Hans-Peter Beise, Thiemo Spielmann, Sayed Hossein Dokhanchi
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Publication number: 20200209347Abstract: A method of orthogonal modulation of radar waves of a phase-modulated continuous wave radar system. The method includes selecting an equidistant bi-phased or multi-phased phase-modulation sequence, phase-modulating the continuous radar wave, and transmitting the orthogonal phase-modulated continuous radar wave towards a scene. The method includes generating a detection sequence (s) by applying an outer coding (H) to the phase-modulation sequence, selecting a communication range (C) in the complex number plane, based on the selected phase-modulation, generating a communication sequence (c) having a plurality of sequence members, mapping the communication sequence (c) into the communication range (C) by applying an injective mapping function (?) to the sequence members, and calculating a numerical product of members of the detection sequence (s) with members of an image of the mapped communication sequence (c).Type: ApplicationFiled: May 9, 2018Publication date: July 2, 2020Inventors: Udo SCHRODER, Hans-Peter BEISE, Thiemo SPIELMANN, Sayed Hossein DOKHANCHI
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Publication number: 20200064455Abstract: A method of direction of arrival estimation with an automotive spread radar system. The automotive spread radar system includes a plurality of at least two transceiver antenna units, which are configured to work in a MIMO configuration, wherein the transceiver antenna units are arranged at a priori known positions. The automotive spread radar system is configured to determine, for each transceiver unit antenna unit of the plurality of transceiver antenna units, a range of a target reflecting radar waves that have been transmitted by at least the specific transceiver antenna unit by reading out a plurality of range gates assigned to a specific transceiver antenna unit. The method and radar system are capable of estimating a direction of arrival without the need of ensuring a synchronization of antennas on the scale of a radar carrier frequency.Type: ApplicationFiled: December 7, 2017Publication date: February 27, 2020Inventors: Udo SCHRODER, Hans-Peter BEISE, Thomas STIFTER
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Publication number: 20200011968Abstract: A method for obtaining an adaptive angle-Doppler ambiguity function (AF) for a target using multiple-input-multiple-output (MIMO) radar that includes a transmit antenna array having a plurality of antenna elements. The method includes generating transmit signals for transmission by the transmit antenna array, the transmit signals defining at least a first transmit trajectory of a phase center within the transmit antenna array; transmitting the transmit signals using the transmit antenna array and receiving receive signals from the target, the receive signals resulting from the incidence of the transmit signals upon the target; and obtaining at least an angle-Doppler ambiguity function (AF) from the receive signals. The first transmit trajectory is such that, in operation, the phase center undergoes random phase center motion (PCM), such that a phase center position within the transmit antenna array varies randomly with time. A system for obtaining an AF is also disclosed.Type: ApplicationFiled: March 1, 2018Publication date: January 9, 2020Inventors: Christian HAMMES, Yogesh NIJSURE, Bjorn OTTERSTEN, Thiemo SPIELMANN, Bhavani Shankar Mysore Rama Rao, Udo SCHRODER
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Publication number: 20190346544Abstract: A method for obtaining an angle-Doppler signature for a target using sparse arrays in multiple-input-multiple-output (MIMO) radar, the MIMO radar including a transmit antenna array, the transmit antenna array being at least one-dimensional (e.g. 2-D, 3-D or 4-D) and having a plurality of antenna elements. The method includes generating transmit signals for transmission by the transmit antenna array, the transmit signals defining at least a first transmit trajectory (e.g. circular) of a phase center within the transmit antenna array, and transmitting the transmit signals using Amplitude Modulation on the transmit antenna array. The method further includes receiving receive signals from the target, the receive signals resulting from the incidence of the transmit signals upon the target, and determining the angle-Doppler signature from the receive signals. The first transmit trajectory is such that, in operation, the phase center undergoes non-linear motion within the transmit antenna array.Type: ApplicationFiled: October 4, 2017Publication date: November 14, 2019Inventors: Christian HAMMES, Yogesh NIJSURE, Bjorn OTTERSTEN, Udo SCHRODER
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Publication number: 20190317207Abstract: An automotive spread MIMO-configured radar system has a plurality of transceiver antenna units for transmitting mutually orthogonal radar waves. Each transceiver antenna unit has a plurality of range gates to indicate a range detected by the transceiver antenna unit. At least one specific transceiver antenna unit (TRx1) is configured to transmit a reference signal received directly by at least one transceiver antenna unit (TRx2) that is separated by an a priori known distance from the specific transceiver antenna unit (TRx1). An evaluation and control unit is configured for reading out the plurality of range gates for the transceiver antenna unit (TRx2), and, based on the read-out range gate that indicates the received reference signal and based on the a priori known distance, for synchronizing the specific transceiver antenna unit (TRx1) and the transceiver antenna unit (TRx2) that received the reference signal and/or for correcting a measured Doppler shift.Type: ApplicationFiled: December 21, 2017Publication date: October 17, 2019Inventors: Udo SCHRODER, Hans-Peter BEISE, Thomas STIFTER