Abstract: A transmission antenna section includes a plurality of transmission antennas, and a reception antenna section includes one or more reception antennas. A modulation section causes a continuous wave common signal generated by an oscillation section to be branched into the same number as the transmission antennas, and performs phase shift keying using a different phase rotation amount for each of the plurality of branch signals. Thus, the modulation section generates a plurality of transmission signals inputted into the plurality of transmission antennas. A processing section generates, on the basis of a plurality of signal components, information on an object by which a radiation wave from the transmission antenna section has been reflected, the plurality of signal components being extracted from each of one or more reception signals received by the antenna section and corresponding to the plurality of transmission signals.

Abstract: An apparatus including: a communication unit configured to perform radio communication; and a control unit configured to perform control such that control information regarding a resource to which a filter for limiting a width of a guard band in a frequency band to be used in the radio communication is applied is transmitted to an external apparatus through the radio communication. The filter improves frequency use efficiency.

Abstract: Blind spot detection and alert systems, devices, and methods are provided herein. An example device includes an optical surface having a plurality of indicator elements; and a controller having a processor and a memory for storing instructions, the processor executing the instructions to control a visual attribute of at least a portion of the plurality of indicator elements displayed on the optical surface to indicate a second vehicle being in a blind-spot of a first vehicle for a period of time.

Abstract: Disclosed is a radar apparatus including: a local oscillator for outputting a local oscillation signal; a transmitter unit; and a receiver unit. The transmitter unit includes: a transmission input configured to receive the local oscillation signal; and a transmitter configured to transmit a transmission signal based on the local oscillation signal that has been received via the transmission input. The receiver unit includes: a reception input configured to receive the local oscillation signal not via the transmission input; a receiver configured to receive a reflection wave based on the transmission signal; a cancel signal generator configured to generate a cancel signal based on the local oscillation signal that has been received via the reception input; and an adder configured to superimpose the cancel signal on a reception signal.

Abstract: A radar waveform generator, having a radar waveform selection assembly, permitting a user to select a waveform by picking any one out of a set of less than 50 center frequencies named in a 5 GHz Wi-Fi standard and any one out of a set of less than 10 pulse repetition waveforms. Further, the radar waveform generator has an electronic network producing and emits the selected radar waveform.

Abstract: A multi-sense circuit includes a transistor circuit having sense nodes and a gate node, a peak detector having inputs coupled to the sense nodes of the transistor circuit and an output, and a control circuit having a gate control node coupled to the gate node of the transistor circuit and an overcurrent protection node coupled to the output of the peak detector.

Abstract: A system comprising: an interrogator device, comprising: a first transmit antenna configured to transmit radio-frequency (RF) signals circularly polarized in a first rotational direction; and a first receive antenna configured to receive RF signals circularly polarized in a second rotational direction different from the first rotational direction; and a target device, comprising: a second receive antenna configured to receive RF signals circularly polarized in the first rotational direction and a second transmit antenna configured to transmit, to the interrogator device, RF signals circularly polarized in the second rotational direction.

Abstract: Disclosed are techniques for improving the probability of detection and the probability of false alarm of a light detection and ranging (LiDAR) system. A receiver of the LiDAR system is configured to obtain a noise signal vector for an operation condition and determine the coefficients of a matched filter based on the noise signal vector. The matched filter is used to filter a returned signal vector corresponding to returned light detected by the receiver. The receiver detects an object in the field of view of the LiDAR system based on identifying, in the returned signal vector filtered by the matched filter, a pulse having a peak higher than a threshold value. In some embodiments, the receiver is configured to determine the threshold value based on the noise signal vector, energy of the transmitted signal, and a desired false alarm rate.

Abstract: A distributed-cooperative-information-processing device according to the present invention is allocated in a distributed manner within a predetermined field. The device measures an environment by using a sensor device; generates estimate determination information being information indicating a probability of a hypothetical set of states in the environment, based on a measurement result of the environment; receives the estimate determination information generated by another distributed-cooperative-information-processing device within the field; manages information of the another distributed-cooperative-information-processing device; and integrates the estimate determination information generated by own device and the estimate determination information received from the another distributed-cooperative-information-processing device.

Abstract: A subsurface interferometric synthetic aperture radar (InSAR) imaging technique for the detection and localization of underground targets in the presence of a rough ground surface comprises a two-step procedure. First, surface clutter suppression is performed with a polarimetric difference operation that does not alter the propagation phase of the target scattered signal; then a subsurface interferometric algorithm is applied to infer target depth by correlating the clutter-suppressed images obtained along two observation paths.

Abstract: Sparse phase unwrapping is disclosed. A first image and a second image are received. The first image and the second image are coregistered. The first image and the second image comprise respective phase data. An unwrapped interferogram is generated, including by solving an optimization problem using a nonconvex penalty function, where minimizing the penalty function produces sparse minimizers.

Abstract: The disclosed subject matter broadly involves a device and a method for determining characteristics of a rock sample. The rock sample can be provided in a sample receptacle. Length of the rock sample can be automatically determined when the rock sample is in the sample receptacle. A current can be provided through the rock sample, which, along with the determined length, can be used to determine one or more of resistance-, porosity-, and permeability-related characteristics of the rock sample.

Abstract: The echoes being picked up in the distance-speed domain, the method being wherein it includes a step of producing a mask, in the distance-speed plane, overlying the zone of detection of the ground and/or sea clutter echoes picked up by the sidelobes, the zone being determinable by the antenna parameters of the radar, the waveform emitted by the radar and the environmental context of the radar, all the points of the distance-speed plane which are covered by the mask being assigned a characteristic which is specific to the mask; a step of filtering the received echoes, in which the echoes covered by the mask are rejected from the radar reception processing.

Abstract: A radar system includes an antenna array for sending and receiving electromagnetic radiation, the array including N transmitting antennas and M receiving antennas, objects being detectable within the detection area of the antennas according to the MIMO principle using the antennas. The transmitting antennas transmit signals that are orthogonal to one another during a transmission cycle. N-n of the transmitting antennas are situated horizontally next to one another and n of the transmitting antennas are situated in a horizontally offset manner at an identical offset from respective ones of the N-n transmitting antennas. M-m of the receiving antennas are situated horizontally next to one another and m of the receiving antennas are situated vertically offset from the M-m receiving antennas.

Abstract: Analysis device 3 is provided with a data acquisition unit 22 for acquiring reflected light data for a laser light reflected by an atmospheric aerosol, and a control unit 21 for analyzing a Doppler shift of the reflected light data. The control unit 21 is provided with a result smoothing unit 43 for excluding a peak portion 51 in the reflected light originating from an obstacle. Further, a peak portion 51 originating from an obstacle is determined to be a peak portion originating from an obstacle when there is a steep slope of a predetermined amount or more in reception intensity within a frequency of a predetermined extent from a transmission frequency of the laser light. The Doppler shift is thus analyzed with a high degree of accuracy.

Abstract: A noise-mitigated continuous-wave frequency-modulated radar includes, for example, a transmitter for generating a radar signal, a receiver for receiving a reflected radar signal and comprising a mixer for generating a baseband signal in response to the received radar signal and in response to a local oscillator (LO) signal, and a signal shifter coupled to at least one of the transmitter, LO input of the mixer in the receiver and the baseband signal generated by the mixer. The impact of amplitude noise or phase noise associated with interferers, namely, for example, strong reflections from nearby objects, and electromagnetic coupling from transmit antenna to receive antenna, on the detection of other surrounding objects is reduced by configuring the signal shifter in response to an interferer frequency and phase offset.

Abstract: Method of slowly moving target detection with application for coastal surveillance radars. This method improves the well know other methods and efficiently detects targets with a high accuracy. The proposed method consists of three steps that are: step of generation and processing of signals with complex modulation; step of target clustering and step of detection of slowly moving targets in clutter environments.

Abstract: A method including providing a replica of a signal emitted by an on-board radar, receiving by a radar detector a signal, the received signal being the sum of a first signal depending on the signal emitted by the on-board radar and a second signal independent of the signal emitted by the on-board radar, the first signal being able to be represented by a linear combination of elementary signals each having an amplitude coefficient and a delay relative to the signal emitted by the on-board radar, processing the received signal, determining the amplitude coefficients and the delays of the elementary signals of the first signal relative to the signal emitted by the on-board radar, from the provided replica and the processed received signal, and eliminating, in the processed received signal, the first signal to obtain the second signal, from the provided replica.

Abstract: A communication system where a central node (base-station or access point) communicates with multiple clients in its neighbourhood using transparent immediate beam-forming. Resource allocation and channel access is such that the central node does not necessarily know when each client starts its transmission. Receive beam-forming in such a system is not possible, as beam-forming coefficients for each client should be selected according to the particular channel realization from that client to the central node. Each client is detected early in its transmission cycle, based on either a signature that is part of the physical characteristics unique to that client, or based on a signature that is intentionally inserted in the clients' signal, and accordingly adjusts its beam-forming coefficients.

Abstract: There is provided a radar sensor and method. The radar sensor comprises a plurality of transmit and receive antennas, a transceiver, a digital signal processor, a filter and an interface. The transceiver is configured to digitize received radar signals to provide a plurality of digital samples. The digital signal processor is configured to form a measurement matrix by transforming the plurality of digital samples into a distance/relative velocity matrix for each combination of the transmit and receive antennas. The filter is configured to identify samples forming the measurement matrix having a signal to noise ratio higher than a threshold value. The interface is configured to transmit the identified samples and their location in the measurement matrix to a remote host processor configured to further carry out direction of arrival processing on the identified samples.

Abstract: 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.

Abstract: A method for determining a distance to a passive intermodulation source in a device under test, the method comprising transmitting at least two signals with respective different frequencies to the device under test, receiving a complex response signal from the device under test, the complex response signal comprising a passive intermodulation of the at least two signals, generating an autocorrelation matrix using the complex response signal, the autocorrelation matrix representing power information of the complex response signal, decomposing the complex response signal, using the autocorrelation matrix, into a signal component part and a noise component part and determining a distance to the passive intermodulation source in the device under test using the noise and/or signal component part.

Abstract: During a location technique, a sensor module in a vehicle, which has non-retractable wheels in contact with a driving surface, determines a location of the vehicle. In particular, the sensor module is positioned on or in a direction of a side-facing surface of the vehicle. Moreover, during operation, the sensor module may transmit radar signals approximately perpendicular to a direction of motion of the vehicle. Then, the sensor module may receive reflected radar signals. Furthermore, the sensor module may analyze a time sequence of the reflected radar signals. Next, the sensor module may determine the location of the vehicle based at least in part on the analyzed time sequence of reflected radar signals.

Abstract: The radar signal processing device includes: a transmitter; a receiver configured to acquire a received signal based on a reflected wave received from the object; a detector unit configured to detect information to be used for type determination of the object from the received signal; an object determination unit configured to determine a type of the object; and a control unit configured to identify a weighting factor set for each piece of the information to be used for the type determination of the object based on a characteristic of the received signal. The object determination unit is configured to obtain a total sum value by multiplying the corresponding weighting factor identified by the control unit for each piece of the information detected by the detector unit, and to determine the type of the object based on the total sum value.

Abstract: A method for operating a radar sensor in which the radar sensor is provided with a signal generating device. The signal generating device generates an outgoing signal as a radar signal that is to be emitted. The radar sensor also includes a signal receiving device for receiving and processing received signals as reflected radar signals. The outgoing signal is generated within a predefinable frequency band. The received signals are monitored for the presence of an interference disruption. When an interference disruption has been detected, the frequency band for the generation of the outgoing signal is at least temporarily reduced in terms of the bandwidth.

Abstract: A capacitance sensing circuit includes a buffer circuit, a modulation circuit, and an integral circuit. The buffer circuit is coupled to an external capacitor through a touch-sensing pad, and includes a pull-up device and a pull-down device. The modulation circuit includes a first current mirror device having a current drivability corresponding to one Nth (where “N” denotes a positive real number) a current drivability of the pull-up device and a second current mirror device having a current drivability corresponding to one Nth a current drivability of the pull-down device. The integral circuit integrates voltage values at an output node of the modulation circuit to output the integrated voltage values. The pull-up device and the first current mirror device constitute a current mirror circuit, and the pull-down device and the second current mirror device constitute another current mirror circuit.

Abstract: A computer-implemented method is provided for maximizing surveillance volume in a radar system. This includes determining saturation range probability fsat; determining sensitivity probability fsens; calculating surveillance volume from multiplying the saturation range probability by the sensitivity probability as Vs=fsatfsens; and adjusting the radar system to maximize the surveillance volume.

Abstract: A radar system for discriminating between sources of radar interference and targets of interest. The system includes a transmitter for transmitting radar signals into a region, a receiver for receiving return signals of the radar signals returned from within the region, and a processor for processing the return signals to discriminate between return signals returned from a first object and return signals returned from a second object where the return signals from the second object comprise both zero and non-zero Doppler components and interfere with the return signals from the first object. The radar system is operable for discriminating between the return signals when the return signals are received at a distance from the second object which is less than a proximity limit based on the geometry of the object.

Abstract: A numerically stable and computationally efficient method for updating and downdating during MVDR (minimum variance distortionless response) adaptive beamforming. The method involves downdating and updating of the triangular (Cholesky) factor of the covariance matrix. The covariance matrix is never explicitly formed, but rather is partitioned and expanded after substituting in the Cholesky factors.

Abstract: A signal detector for detecting an information component of a passive radar detection signal, comprises a sampler operable to obtain a sample segment, in time domain, of a radar detection signal, a signal processor operable to identify a relatively high power periodic component of the sample segment signal spectrum in contrast to a relatively low power information component of the sample segment signal spectrum, and a signal rejector operable to window the detection signal with respect to the identified periodic component, to retain parts of the signal not interfered by said periodic component.

Abstract: A method is described for operating a radar device for a motor vehicle, the method comprising the following steps: Providing operating data of a HF unit of the radar device; Transmitting the operating data of the HF unit via a digital data bus to a microcomputer unit; and Evaluating the operating data of the HF unit with the aid of the microcomputer unit.

Abstract: Described embodiments provide sidelobe cancellation for Simultaneous Transmit and Receive systems. The sidelobe cancellation system includes an array having a primary aperture and an auxiliary array. The auxiliary array includes a plurality of antenna elements disposed adjacent to at least one side of the primary aperture. Each element of the auxiliary array is coupled to a variable attenuator, a variable phase shifter or a variable true time delay unit. A controller tunes the auxiliary array to cancel sidelobes of the primary aperture by adaptively selecting an attenuation value of the variable attenuator, a phase shift value of the variable phase shifter and a time delay value of the variable true time delay unit for each element of the auxiliary array. The auxiliary array operates as an adaptive finite-impulse response (FIR) filter with each antenna element of the auxiliary array operating as an adaptive tap of the adaptive FIR filter.

Abstract: Systems and methods for labeling radar tracks for machine learning are disclosed. According to some aspects, a machine accesses data from radar unit(s), the data from the radar unit(s) comprising radar tracks, each radar track comprising one or more of the following: Doppler and micro-Doppler measurement(s), range measurement(s), and angle measurement(s). The machine accesses data from computer vision device(s), the data from the computer vision device(s) comprising image(s), the data from the computer vision device(s) being associated with a common geographic region and a common time period with the data from the radar unit(s). The machine labels, using an image recognition module, objects in the image(s). The machine determines, based on the common geographic region and the common time period, that labeled object(s) in the image(s) map to radar track(s). The machine labels the radar track(s) based on labels of the labeled objects.

Abstract: A method of detecting a synchronization switching pulse using a power detector in a time division duplexing (TDD) system includes receiving an input signal, detecting a power level associated with the input signal using a digital power meter, and determining a configuration associated with the input signal. The method also includes determining that a pulse width associated with the input signal is greater than a threshold, determining an offset associated with a special subframe configuration, and generating an estimated sync pulse. The method further includes forming a regenerated sync pulse, determining an error between the estimated sync pulse and the regenerated sync pulse, determining that the error is less than a threshold, and providing a lock detect.

Abstract: The present technique presents a hardware mechanism by which high performance computational engines utilize external/system memory buffers for data source and sync thus requiring a minimized amount of local buffering and imposing almost no buffer or data size limitations.

Abstract: A stochastic Bayesian nonlinear filtering system and method that improves the filtering of noisy signals by providing efficiency, power, speed, and flexibility. The filter only requires the likelihood function p(observation|state) to determine the system state and works in various measurement models. This allows for the processing of noisy signals to be used in real time, such as in a biofeedback device that senses noisy surface electromyography muscle electrical activity, filters the sensed signal using the nonlinear filtering method, and provides vibrations based on the muscular activity.

Abstract: The present disclosure relates to a method and apparatus for detecting a target object by a radar device for a vehicle. The method includes recognizing the situation that causes the deterioration in the function of a radar, and preventing the performance from deterioration through a signal processing technology. The apparatus includes: a signal transmitting unit that transmits a transmission signal for detecting a target object; a signal receiving unit that receives a reception signal generated by a reflection of the transmission signal; a signal analyzing unit that calculates frequency spectrum information of the reception signal, and extracts periodicity information for determining a periodicity of the frequency spectrum information; a determining unit that determines whether a clutter structure exists; and a target detecting unit that detects a target object by deleting a peak value component of the periodicity information when it is determined that the clutter structure exists.

Abstract: A method begins by one or more processing modules of one or more computing devices of a radar system determining whether a radar signature varies cyclically with time, and when the radar signature varies cyclically with time the method continues with the one or more processing modules collecting state telemetry information for the radar signature, along with a signal representation for the radar system. The state telemetry information includes rotation angle, yaw angle and rotation rate for the object responsible for the observed radar signature and the signal representation for the radar system includes data sufficient to determine an I/Q signal for the radar system. The method then determines a characterized radar signature for the object responsible for the radar signature and based on the state telemetry and the signal representation, substantially removes the radar signature from radar data.

Abstract: A system and method for resolving a first target from a second target by radar is disclosed. The system includes a transmitter for transmitting a source signal, a receiver for receiving first and second echo signals from reflection of the source signal from at least a first target and a second target, respectively. A processor is used to subtract the first echo signal from the composite signal to obtain a second generation of the second echo signal, subtract the second generation of the second echo signal from the composite signal to obtain a second generation of the first echo signal, and estimate a parameter value for the first target from the second generation of the first echo signal and a parameter value for the second target from the second generation of the second echo signal.

Abstract: In a computerized method to reduce noise in phased-array signals from a set of receivers at different locations, time-series are received from the receivers, which time-series form phased-array signals. The time-series are ordered based on the different locations of the receivers and spatially phased series are obtained from the ordered time-series. Each of the spatially phased series obtained includes a series of signal values that are spatially phased. A noise component is identified in each of the spatially phased series obtained and removed from the spatially phased series to obtain denoised series. Related receiver systems and computer program products are also provided.

Abstract: Embodiments of the present invention allow for radar imaging that is not range dependent for resolution. Arrays of cells comprised of antennas and true delays can be placed behind the target. The signal reflected by the individual cells provides information on whether the cell is blocked by the target. Additional information can be determined from the radar returns, such as material properties and target thickness. Similar structures can be constructed to act as wireless barcodes.

Abstract: A radar device includes: radar transmitting circuitry which, in operation, generates Nt radar signals by modulating Nt transmission code sequences and transmits the radar signals via Nt transmission antennas, Nt being more than 1; and radar receiving circuitry which, in operation, receives reflection wave signals via Nr reception antennas and performs Doppler frequency analysis, Nr being more than 1. The radar transmitting circuitry stores a predetermined pulse sequence and Nt or more orthogonal code sequences, second half elements of the Nt or more orthogonal code sequences are arranged in an order reverse to first half elements of the Nt or more orthogonal code sequences and generates each of the Nt transmission code sequences by multiplying elements of the predetermined pulse sequence by elements of the Nt or more orthogonal code sequences different from each other.

Abstract: Methods, systems, and non-transitory computer readable media for reconstructing electronic images using blurring and noise-enhanced pixel intensity resampling are disclosed. One method includes, at an image reconstructor including at least one processor, receiving an image compressed using an image compression algorithm. The method further includes decompressing the image using an image decompression algorithm. The method further includes modifying pixel intensities in the image by blurring and/or resampling the pixel intensities according to a noise distribution generated by the reconstructor without receiving a noise estimate from an image compressor. The method further includes outputting the image with the modified pixel intensities.

Abstract: The present disclosure provides a gated range scanning linear frequency modulated continuous wave (LFMCW) radar structure, including: a frequency synthesizer, a first mixer, a second mixer, a first filter, and a third mixer. The frequency synthesizer is configured for generating a first local oscillating signal and a second local oscillating signal, a frequency of the first local oscillating signal varying in a frequency range, each frequency corresponding to a sub-range of a coverage range scanned by the LFMCW radar structure. The first mixer is configured for mixing a copy of a transmitted signal and the first local oscillating signal to generate a first output signal (the receiver's first local oscillator). The second mixer is configured for mixing the first output signal and a received signal from a receiving antenna to generate a second output signal that includes an intermediate frequency (IF) signal being received by the first filter.

Abstract: Phased array radar systems for unmanned aerial vehicles (UAVs) are disclosed. A disclosed example radar apparatus for a small UAVs includes a transmitter to transmit a transmit signal in the X-band, a receive phased array including at least two receive antennas, wherein the receive phased array provides a field-of-view of at least 100 degrees in a first direction and at least 20 degrees in a second direction perpendicular to the first direction, a first processor programmed to determine a location of an object based on an output from each of the at least two antennas, a second processor programmed to perform collision avoidance based on the location of the object, and a mount to mechanically couple the radar apparatus to the UAV.

Abstract: Disclosed is an ATC Radar and a method of operating an ATC Radar, including the steps of: receiving In-phase (I) and Quadrature (Q) signals; creating first and second complex clutter maps using the I and Q signals; wherein the first map comprises data which is dynamically updated on a per-scan basis and the second map comprises data indicative of a static environment with no targets; subtracting data from the second map from the received I and Q signals to mitigate the effects of static objects in the environment, to yield compensated I and Q data; and using the compensated I and Q data for target detection and/or tracking.

Abstract: The present disclosure relates to exemplary embodiments of radar systems for providing increased robustness against radar interference transmissions and methods for controlling such radar systems. The radar system comprises at least one radar antenna configured at least for receiving a radar signal, a radar signal dividing means, a first receiver device and a second receiver device. The first receiver device is configured for monitoring a first frequency range and the second receiver device is configured for monitoring a second frequency range, wherein the second frequency range is wider than the first frequency range and the first frequency range is a subset of the second frequency range. The second receiver device is configured for measuring interference levels within the second frequency range.

Abstract: Systems and methods for providing a synthetic track to observation devices are provided. In one embodiment, a method can include determining a location range and a time range for a synthetic track to be created by a plurality of platforms. The method can further include determining an emission location and an emission time for each of the platforms of the plurality of platforms based, at least in part, on the location range and the time range. The method can include sending a set of data to each of the plurality of platforms, each respective set of data indicating the emission location and the emission time at which the respective platform is to generate the emission to create the synthetic track.

Abstract: A variable bandwidth filter is described herein, wherein a bandwidth of a passband of the variable bandwidth filter is dynamically tunable. The variable bandwidth tuner is implemented on a CMOS chip, and acts to filter analog signals. The variable bandwidth filter comprises a plurality of finite impulse response (FIR) filters, wherein each FIR filter comprises a plurality of tunable transconductors. The tunable transconductors are tunable in their gain.

Abstract: The various technologies presented herein relate to detecting small moving entities or targets in radar imagery. Two SAR images can be captured for a common scene, wherein the scene is imaged twice from the same flight path. The first image is captured at a first instance and the second image is captured at a second instance, and differences between the two images are determined using a complex SAR change measure, excess coherency factor or DeltaC, based in part upon quantification of incoherent (or magnitude) change between the two images. A plurality of operations are performed to enable extraction of coherent change measures relating to the small moving entities from measures relating to large objects, stationary reflective structures, radar focusing artifacts, etc.