Nxp B.v.

Koninklijke Philips Corporation N.v.

Taiwan Semiconductor Manufacturing Comp. Ltd.

Arie Geert Cornelis Koppelaar

Frank Leong

Alessio Filippi

Wolfgang Küchler

Thomas Baier

Jan Dutz

Artur Tadeusz Burchard

Feike Guus Jansen

Hong Li

Francesco Laghezza

Yiting Lu

Ewout Brandsma

Oswald Moonen

Emmanuel David Lucas Michael Frimout

Marinus Van Splunter

Gert-Jan Koolen

Onno Eerenberg

Jeroen Overdevest

Ludovicus Marinus Gerardus Maria Tolhuizen

Lucien Johannes Breems

Andries Pieter Hekstra

Constant Paul Marie Jozef Baggen

Massimo Ciacci

Stefan Drude

Paul Mattheijssen

Wilhelmus Johannes Van Houtum

Aly Aamer Syed

Marco Jan Gerrit Bekooij

Özgün Paker

Frank Harald Erich Ho Chung Leong

Weihua Tang

Lars Van Meurs

Sonia Marcela Heemstra De Groot

Abraham Jan De Bart

Tarik Kazaz

Karan Jayachandra

Luis Fernando Abanto Leon

Andrew Turley

Armand Stuivenwold

Wolfgang KÜCHLER

A non-transitory computer-readable medium stores machine instructions that cause a processor to obtain a range-sample-antenna data cube for a received radar signal comprising reflections of a plurality of interleaved chirp sequences. The processor generates, for each chirp sequence, a Hankel matrix based on subset of range bins for the particular chirp sequence, and generates a block Hankel matrix based on the Hankel matrices for the plurality of interleaved chirp sequences. The processor performs truncated singular value decomposition to estimate subspaces, and object detection to identify selection matrices. The processor calculates least-squares approximations for the selection matrices and the block Hankel matrix to obtain, for each chirp sequence, a first phase shift matrix θand a second set of phase shift matrices θ, l=2, . . . , L. The processor performs joint diagonalization and Doppler division multiplexing compensation on θand θ, l=2, . . . , L, then resolves ambiguities in determined velocities based on comparison of θand θ, l=2, . . . , L.

Method and apparatus for processing joint multiple chirp sequences

Phase noise reduction is described for symmetric bistatic radar. In one example, a first beat signal is generated of a second signal received at a first antenna and a third beat signal is generated at a second antenna of a first linear antenna array. A second beat signal is generated of a first signal received at a first antenna of a second linear antenna array. The first beat signal and the third beat signal are multiplied with the complex conjugate of the second beat signal to generate products that are combined to generate a phase estimation correction term that is applied to first and second sets of radar return signals.

Phase noise reduction for symmetric bistatic radar

A method of processing radar signalling, the method comprising: receiving a mask () that represents samples in the radar signalling that are detected as including interference. The mask () 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 () across each of the fast-time axis and the slow-time axis of the mask in order to provide a range-Doppler processed mask (); and deconvolving a range-Doppler map () of the received radar signalling using the range-Doppler processed mask () in order to provide a deconvolved-range-Doppler map ().

Method of processing radar signalling

An apparatus configured to receive an input dataset,, indicative of radar signals reflected from targets as received at a plurality of antenna elements; define a matrix, A, formed of direction-of-arrival-angle vectors,, each direction-of-arrival-angle vector representing an expected response at the plurality of antenna elements of radar signals from one of the targets; define a signal amplitude vectorto represent expected complex amplitudes as received in the radar signals; define an objective function based on, A and; search for a set of direction of arrival angles for each of the plurality of targets by the repeated evaluation of the objective function for a plurality of candidate matrices based on matrix A; and wherein said search space comprises a plurality of discrete points, z, associated with the direction of arrival angles by a function of sin(θ).

Method and apparatus for determination of direction of arrival angle

A radar processor for processing a frame of radar data received from one or more targets, the frame of radar data having a carrier frequency and comprising a sequence of codewords with a codeword repetition interval, wherein the carrier frequency and the codeword repetition interval define an unambiguous velocity range, the radar processor configured to: receive the frame of radar data; transform the frame to obtain a velocity data array; apply a correction algorithm to the velocity data array to correct a Doppler shift of the frame to obtain a corrected array, wherein the correction algorithm comprises a set of Doppler correction frequencies corresponding to a set of velocity gates and at least one of the set of Doppler correction frequencies corresponds to a velocity gate outside the unambiguous velocity range; and perform range processing on the corrected array to obtain a range-Doppler map.

Radar processor

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.

Method and system for single target direction of arrival estimation for sparse array radar systems

Aspects of the present disclosure may involve use of a radio frequency receiver and in such a receiver, tracking multipath gains and delays of multipath reflections corresponding to an OFDM multipath transmission channel. The gains and delays are based on time-domain evolution of the channel impulse response. Multipath reflections are searched for and then used to calculate channel correlation information to provide channel estimations to aid in mitigating or cancelling distortion of the received signal.

Processing signals to account for multipath-reflection phenomena in RF communications

Aspects of the disclosure are directed to a communications environment involving a plurality of remote transmitters that communicate over respective subchannels. As may be implemented in accordance with one or more embodiments, energy characteristics of wireless transmissions received from one of the remote transmitters and a location that remote transmitter are respectively ascertained, for each of such subchannels. One of the subchannels is selected based on the ascertained energy characteristics and locations of the remote transmitters, and data is generated for transmission over the selected one of the subchannels.

Location-based communication

Interference cancellation is provided, according to certain aspects, by a filter, a signal detection circuit, synthesis circuitry and signal-generation circuitry. The filter is used to filter an incoming signal having an associated signal-to-noise metric and to output therefrom a filtered signal having an interference attribute of the incoming signal by amplification and/or isolation. The signal detection circuit is used to detect the interference attribute in the filtered signal. The synthesis circuitry is used to synthesize interference in the incoming signal based on the interference attribute. The signal-generation circuitry is used to generate, in response to the synthesized interference in the incoming signal, a filtered version of the incoming signal which provides an improved signal-to-noise metric.

Systems and methods involving interference cancellation

A processing module for a first lock device of a range determination system, the range determination system comprising a lock group comprising a plurality of lock devices of which the first lock device forms part, the plurality of lock devices physically spaced over a lockable element and configured to communicate with a key group comprising a plurality of key devices, a shortest distance between any one of the key devices of the key group and any one of the lock devices of the lock group providing for access to the lockable element relative to a threshold distance.

Processing module and associated method

A processing module for a receiver device is disclosed. The processing module is configured to provide for processing of a signal received by the receiver device from a transmitter device. The signal includes a secure training sequence divided into a plurality of time spaced blocks. The secure training sequence incoudes a non-repeating pattern of symbols. The processing module is configured to, based on a first phase marker in the first block and a second phase marker in the second block defining a phase difference of the signal between the first and second antennas and a known spacing of the first antenna relative to the second antenna, determine an angle of arrival of the signal relative to the receiver device.

An apparatus is configured to, based on a first signal comprising one or more data transmission frames received from a first radio device by a second radio device. The first signal has a particular carrier frequency of a carrier wave thereof and the one or more data transmission frames comprising a plurality of symbols provided at a particular symbol frequency. The carrier frequency and symbol frequency based on a reference clock frequency of the first radio device. One or more of an estimate of the particular carrier frequency is determined and an estimate of the particular symbol frequency relative to a reference clock frequency of the second radio device and provide for transmission of a response signal from the second radio device to the first radio device.

Apparatus for a radio device

A processing module for a receiver device configured to provide for processing of a frame received by the receiver device from a transmitter device, the at least one frame comprising a plurality of repeating predetermined synchronization symbols for providing synchronization between the processing module and the transmitter device and one or more start-of-frame symbols defining the end of the synchronization symbols, the processing module configured to:

A processing module for a transmitter device configured to provide for generation of a signal comprising at least one frame for transmission by the transmitter device to a receiver device, the processing module configured to provide for processing of an input pulse stream comprising a stream of pulses representative of data, to provide an output pulse stream, each pulse of the pulse streams having one of two states defining the phase with which a carrier wave is modulated; the processing module configured to;

A receiver for receiving an input signal is disclosed. The receiver includes a processor, a memory, a plurality of sub-receivers configured to receive a plurality of versions of the input signal through a plurality of transmission channels, a sub-receiver selection module configured to select one more of the plurality of sub-receivers using expected contributions to signal-to-noise (SNR) of an output signal based on an uncertainty of the estimated contributions. The receiver also includes a combiner to combine outputs of the selected sub-receivers to produce the output signal.

Growing community of inventors

Giessen, Netherlands

Arie Geert Cornelis Koppelaar