Abstract: A method for predicting a false positive detection by a radar sensor includes simulating a radar signal, determining a plurality of reflected radar signal rays based on the simulated radar signal and data regarding at least one vehicle component that may be a source of a false positive detection based on received reflected radar signal rays, selecting detectable rays from the reflected radar signal rays, determining an energy level for each detectable ray based on a reflectivity of the at least one vehicle component, clustering at least some of the detectable rays based on a distance between a reflection origin location of at least two of the detectable rays being within a predefined range, determining an energy level of clustered detectable rays, and determining a false positive based on the determined energy level of the clustered detectable rays being above an energy threshold.

Abstract: Systems and methods for enhanced fault tolerance for a radio frequency identification (RFID) phased array antenna are provided. The systems include a RFID reader that includes (i) a phased array antenna having N antenna elements; and (ii) a controller operatively connected to the phased array antenna. The controller is configured to (1) monitor a characteristic for each antenna element of a set of the N antenna elements; (2) based on the characteristic, detect a fault of a faulty antenna element of the set of the N antenna elements; and (3) responsive to detecting the fault of the faulty antenna element of the set of the N antenna elements, adjust a parameter of at least one other antenna element of the N antenna elements, wherein the parameter is a weight applied to a signal that is transmitted to or received at an antenna element.

Abstract: A method for building a coherent radar cross-section (RCS) model database for real-time dynamic simulation of range-Doppler radars is disclosed. The database may be used with radar sensors that employ different waveforms. A pre-processing operation before the dynamic simulation performs fast Fourier Transforms (FFTs) to interpolate the target frequency responses from the database to match the frequency samplings of the radar used in the dynamic simulation. The method determines the frequency responses of the targets to a reference chirp in a coherent processing interval (CPI) and the radial velocities of the targets relative to the radar at the time of the reference chirp. The method extrapolates, using FFTs, the frequency responses of the targets to the reference chirp across the velocity dimension based on the relative radial velocities to determine the frequency responses of the targets to the other chirps across the CPI, reducing the computational burden for the simulation.

Abstract: A method is provided for calibrating a radar sensor. According to the method, a plurality of radar detections is acquired via the radar sensor, and an angle of arrival is determined for each of the radar detections. Equidistant bins of an electric angle are defined which are related to the angle of arrival, and the radar detections are assigned to the equidistant bins of the electric angle. Based on the assignment, a reconstructed array manifold is determined for calibrating the radar sensor.

Abstract: A method (10) for restoring a microwave link is provided. The method (10) is performed by a network entity (7) and comprises receiving (11) information from a node (3) controlling a microwave antenna (5), the information indicating that an obstacle is at least partly obscuring the microwave antenna (5), and instructing (12), based on the received information, an unmanned aerial vehicle (6) adapted for maintenance work to fly to a given location for removing the obstacle on the microwave antenna (5). A method (40) in a network node (3), a method (70) in an unmanned aerial vehicle (6) and devices are also provided.

Abstract: A temperature test apparatus 1 includes a test antenna 6 configured to transmit or receive a radio signal to or from the antennas 110 in order to measure reception characteristics or transmission characteristics of the DUT 100, a heat-insulating housing 70 made of heat-insulating material surrounding a space region 71 including a quiet zone QZ, and a measuring device 20 configured to measure the transmission characteristics or the reception characteristics of the DUT 100. The heat-insulating housing 70 has a flat plate shaped part 70a in a region through which radio waves of a radio signal transmitted from the test antenna 6 passes before entering the quiet zone QZ. The flat plate shaped part 70a is perpendicular to the traveling direction of the radio waves of the radio signal entering the quiet zone QZ.

Abstract: A calibration system including a signal generator device, at least one calibration receiver and a processing circuit is described. The signal generator device has a signal generation circuit configured to generate a signal, at least one signal path terminating at a signal output port of the signal generator device, and at least one tap provided in the signal path. The at least one calibration receiver is connected with the at least one tap in the signal path. The at least one calibration receiver is connected with the processing circuit. The processing circuit is configured to receive measurement results obtained by the at least one calibration receiver and to analyze the measurement results received, thereby determining analysis results.

Abstract: Methods and systems are provided for dynamically adjusting the beamform of an antenna array. An intended beamform, which should ideally be propagated by an antenna array based on a supply of a first set of signals, may not be realized if one or more antenna elements of the antenna array are experiencing a fault. Utilizing various methods, one or more faulty antenna elements of the antenna array are identified and a second set of signals is calculated that, when propagated by one or more operational antenna elements, yield an optimized beamform, wherein the optimized beamform at least partially recovers a portion of a coverage gap.

Abstract: A transportation apparatus includes an external detection device configured to detect an object. The external detection device includes: an irradiation surface; and an adjustment portion for adjusting an angle of the irradiation surface, the adjustment portion is adjustable from a hole portion provided in the transportation apparatus, and the hole portion is offset with respect to the adjustment portion and the irradiation surface.

Abstract: Techniques and apparatuses are described that enable radar attenuation mitigation. To improve radar performance, characteristics of an attenuator and/or properties of a radar signal are determined to reduce attenuation of the radar signal due to the attenuator and enable a radar system to detect a target located on an opposite side of the attenuator. These techniques are beneficial in situations in which the attenuator is unavoidably located between the radar system and a target, either due to integration within other electronic devices or due to an operating environment. These techniques save power and cost by reducing the attenuation without increasing transmit power or changing material properties of the attenuator.

Abstract: A communication apparatus that includes a first antenna array having a first plurality of antenna elements, and a first plurality of thermoelectric devices that are arranged on the first plurality of antenna elements of the first antenna array such that each thermoelectric device covers a different subset of antenna elements of the first plurality of antenna elements. The communication apparatus further includes a processor that determines an operational state of the first plurality of antenna elements. The processor controls each of the first plurality of thermoelectric devices based on the determined operational state of the first plurality of antenna elements such that an adaptive cooling is applied on different subsets of antenna elements of the first plurality of antenna elements to maintain a temperature of the first plurality of antenna elements in a specified temperature range.

Abstract: Devices, systems and processes for identifying and detecting an interfering signal are described. A process may include conducting a scan of one or more frequency bands to obtain at least one scan result and determining therefrom if a response condition has been detected. If so detected, a first frequency band corresponding to the detected response condition may be identified and a response condition action to be performed determined. If no response condition action is to be performed, scanning continues. If a response condition is to be performed two or more available sensors are identified and a first sensor is selected. A scan plan is developed and then initiated by the first sensor. Data from the first sensor is received and analyzed to identify a second frequency band indicative of an interfering signal. Based on at least the scan data, a location for a signal interference source (SIS) may be estimated.

Abstract: A radar sensor for use in a vehicle is described. The radar sensor comprising: at least one transmitter and at least once receiver to transmit and receive radar signals of the radar sensor; an acceleration sensor to measure the acceleration of said radar sensor or the chassis of said vehicle; a processor coupled to said acceleration sensor to calculate a tilt in a radar signal projected from said vehicle using said measured acceleration; a memory for storing said calculated radar tilt.

Abstract: A FMCW radar system with a built-in self-test (BIST) system for monitoring includes a receiver, a transmitter, and a frequency synthesizer. A FMCW chirp timing engine controls timing of operations at least one radar component. The BIST system includes at least one switchable coupling for coupling a first plurality of different analog signals including from a first plurality of selected nodes in the receiver or transmitter that are all coupled to a second number of monitor analog-to-digital converters (ADCs). The second number is less than (<) the first plurality of different analog signals. The BIST system includes a monitor timing engine and controller operating synchronously with the chirp timing engine, that includes a software configurable monitoring architecture for generating control signals including for selecting using the switchable coupling which analog signal to forward to the monitor ADC and when the monitor ADC samples the analog signals.

Abstract: A pulse generating device of an in-vehicle radar configured to output a high frequency pulse including a main lobe and a side lobe includes a high frequency oscillator that generates a carrier wave of a predetermined frequency, an output variable device that adjusts an output of the high frequency oscillator, a power measuring unit that measures the output of the high frequency oscillator, a temperature measuring unit that measures an ambient temperature, a baseband pulse generating unit that generates a signal of a pulse shape, and a modulator that modulates the output of the high frequency oscillator with the signal of the pulse shape, and, when the ambient temperature is a first threshold value or less, the output or the pulse shape is adjusted so that the side lobe is a predetermined output or less.

Abstract: Example systems and methods for antenna pattern characterization are described herein. The systems and methods are based on compressive sensing. An example method can include arranging a test antenna and a probe antenna in a spaced apart relationship; arranging a spatial light modulator within in a near field region of the test antenna; and projecting, using a light source, a plurality of light patterns onto the spatial light modulator. The method can also include transmitting, using the test antenna, a respective beam while each of the light patterns is projected onto the spatial light modulator; and receiving, using the probe antenna, a respective signal corresponding to each of the respective beams transmitted by the test antenna. The method can further include reconstructing the test antenna's near field using the respective signals received by the probe antenna. The test antenna's near field can be reconstructed using a compressive sensing algorithm.

Abstract: A prevention section generates a prevention signal by performing an interference removal process of preventing an influence of radio wave interference with respect to a non-prevention signal acquired by an acquisition section from a radar sensor for each processing cycle. An analysis section performs a frequency analysis process by using the prevention signal when an operation mode is an interference mode and by using the non-prevention signal when the operation mode is a normal mode. A determination section determines, based on an analysis result obtained by the analysis section, whether radio wave interference is present. When the operation mode is the normal mode and the interference is determined to be present, a switching section switches the operation mode to the interference mode, maintains the interference mode during a certain number of processing cycles, and then switches the operation mode to the normal mode.

Abstract: An apparatus includes a phased array antenna panel and one or more dual-polarization beam former circuits mounted on the phased array antenna panel. The phased array antenna panel generally comprises a plurality of dual-polarization antenna elements. The plurality of dual-polarization antenna elements are generally arranged in one or more groups. Each dual-polarization beam former circuit may be coupled to a respective group of the dual-polarization antenna elements. Each dual-polarization beam former circuit generally comprises a plurality of transceiver channels. Each transceiver channel generally comprises a horizontal channel and a vertical channel. Each dual-polarization beam former circuit provides polarization rotation through bias current control in each of the vertical and horizontal channels.

Abstract: In order to enable both a circuit scale of an apparatus that receives signals via antennas and a band of an interface between apparatuses to be small, a first communication apparatus according to the present invention includes: a reception processing unit configured to receive, from a second communication apparatus which receives signals via a plurality of antennas, channel related information related to a channel of signals received via the plurality of antennas; and a transmission processing unit configured to transmit, to the second communication apparatus, weight information related to receiving antenna weights by which the second communication apparatus multiplies signals received via the plurality of antennas, the weight information being generated based on the channel related information.

Abstract: Wireless communications systems and methods related to mitigation of calibration errors are provided. A base station (BS) transmits, via an antenna array including a plurality of antenna elements, a first communication signal using a first number of the plurality of antenna elements and a first transmission power level to a user equipment (UE). The BS receives from at least one UE, a measurement report based on the first communication signal. The BS transmitting a second communication signal using a second number of the plurality of antenna elements and a second transmission power level based on the one or more measurement reports. At least one of the first number of the plurality of antenna elements is different from the second number of the plurality of antenna elements, or the first transmission power level is different from the second transmission power level. Other aspects and features are also claimed and described.

Abstract: The present invention provides a base station antenna, which includes a plurality of radiating unit arrays, a plurality of feeding modules, and a calibrating module. Each radiating unit array includes a plurality of radiating units. Each feeding module includes a power division network and a radio frequency inlet, the power division network is configured for allocating an input power from the radio frequency inlet to each radiating unit of the radiating unit array. The calibrating module includes a plurality of directional couplers and combiners, a coupling end of each directional coupler connected with the radio frequency inlet is defined as a coupler input terminal, a coupling end of each directional coupler connected with the combiner is defined as a coupling terminal, and the calibrating module is configured for monitoring and comparing signal amplitudes and phases of each of the radio frequency inlets.

Abstract: This application discloses a correction and testing system, comprising a first phased array, a second phased array, and a test instrument, wherein the first phased array comprises a first radio frequency RF channel, the test instrument is configured to: determine, based on a coupling signal, an amplitude deviation value and a phase deviation value that correspond to the first RF channel; if the amplitude deviation value and the phase deviation value satisfy a preset error correction condition, correct an amplitude coefficient and a phase coefficient that correspond to the first RF channel to obtain a target amplitude coefficient and a target phase coefficient; and measure performance indicator parameters of the first phased array by using the target amplitude coefficient and the target phase coefficient. The correction and testing system can improve test efficiency, reducing a floor area, and lowering costs.

Abstract: An antenna array testing circuit can include a circuitry including a plurality of memory registers, a testing sequence generation logic, and a testing control logic. The memory registers can store, for each antenna element of a plurality of antenna elements of the phased antenna array, a corresponding antenna element ID. The memory registers can store a testing step ID indicative of a testing step of a sequence of testing steps. The testing sequence generation logic can determine, for each antenna element of the phased antenna array, using the corresponding antenna element ID and the testing step ID, a corresponding testing signal indicative of a testing state of the antenna element during the testing step. The testing control logic can cause each antenna element the phased antenna array to be configured according to the corresponding testing signal during the testing step.

Abstract: The present invention relates to a device for operating a navigation satellite on the basis of a code division transmission array antenna and a method for operating a navigation satellite. The device for operating a navigation satellite on the basis of a code division transmission array antenna, according to the present invention, comprises: a code generation unit for allocating a spread spectrum code to each of a plurality of antennas; a determination unit for determining, as transmission-end antennas, at least some of the plurality of antennas, to which different spread spectrum codes are allocated; and a processing unit, which arranges each of the transmission-end antennas at predetermined coordinates such that a plurality of signals transmitted from the transmission-end antennas are transmitted to reception-end antennas through multiple paths.

Abstract: A device may cause a change for each remote electrical tilt component of a plurality of remote electrical tilt components associated with a plurality of antennas of a base station. The device may receive a set of return loss values associated with the plurality of antennas, based on causing the change for each remote electrical tilt component of the plurality of remote electrical tilt components, to generate a plurality of sets of return loss values. The device may calculate statistical measures for return loss values of the plurality of sets of return loss values. The device may identify port identifiers for the ports associated with the plurality of antennas based on at least in part on comparing the statistical measures for the return loss values of the plurality of sets of return loss values with a threshold.

Abstract: A radar method is described herein. In accordance with one embodiment the method includes receiving a plurality of chirp echoes of transmitted radar signals, generating a digital signal based on the plurality of chirp echoes, and calculating a range map based on the digital signal. The range map includes a plurality of values, each value is represented by an amplitude value and a phase value, and each value is associated with one frequency bin of a set of frequency bins and one chirp echo of the plurality of chirp echoes. The method further includes identifying chirp echoes which are affected by interference and determining, for one or more selected frequency bins, corrected phase values based on phase values that are associated with chirp echoes not identified as affected by interference.

Abstract: A testing system for testing the performance of a detector is described, comprising a target generator for generating a target and a control unit that comprises at least one of a processing sub-unit, an analyzing sub-unit and a calculation sub-unit. The control unit is connected to the target generator such that the control unit is configured to control the target generator for controlling the target generated. The target generator is configured to transmit signals to the detector and/or to receive signals from the detector. The control unit is further configured to receive and to process data related to a detected target by the detector wherein the control unit is configured to determine a constant false alarm rate based on the data received by the detector and/or the data of the target generator for characterizing the performance of the detector. Furthermore, a method for testing the performance of a detector is described.

Abstract: Small cell identification using machine learning is provided. A method can include extracting, by a device comprising a processor, signal strength information for a cell in a cellular communication network from user equipment log data; estimating, by the device, path loss information associated with the cell at respective distances based on the signal strength information for the cell, resulting in estimated path loss information; and, based on the estimated path loss information, optionally along with other information such as antenna transmission power, antenna transmission frequency band, percentage of user equipments having a distance to a base station within a threshold, maximum user equipment distance to a base station, etc., classifying, by the device, the cell as a type from a group of types of cells, the group comprising a macro cell and a small cell.

Abstract: A wireless test system includes a load board having an upper surface and a lower surface. The load board has a testing antenna disposed on the load board. A socket for receiving a device under test (DUT) having an antenna structure therein is disposed on the upper surface of the load board. The antenna structure is aligned with the testing antenna. The wireless test system further includes a handler for picking up and delivering the DUT to the socket. The handler has a clamp for holding and pressing the DUT. The clamp is grounded during testing and functions as a ground reflector that reflects and reverses radiation pattern of the DUT from an upward direction to a downward direction toward the testing antenna.

Abstract: In order to address the potential for antenna failure in large antenna arrays, a method, a computer-readable medium, and an apparatus are provided for wireless communication, e.g., at a base station or CPE. The apparatus detects a failure of a plurality of antenna elements in an antenna array associated with an antenna module in an antenna array comprising a plurality of antenna modules. The apparatus then applies a mitigation procedure in response to detecting the failure, e.g., when a fraction of antenna elements for which a failure is detected meets a threshold. The mitigation procedure may include any of switching to a different codebook, increasing DL or UL transmission power, or a VGA. The failure may be detected by transmitting pilot signals using sets of antenna elements of the antenna array and using signal strength measurements to detect antenna element failures.

Abstract: Embodiments of this application provide an antenna calibration method and apparatus. In the method, for a first antenna unit and a second antenna unit, candidate phase compensation coefficients used for antenna calibration are determined based on channel responses indicating that a first calibration signal sent by the first antenna unit is received by the first antenna unit and the second antenna unit and channel responses indicating that a second calibration signal sent by the second antenna unit is received by the first antenna unit and the second antenna unit; and a phase compensation coefficient is selected from the candidate phase compensation coefficients based on measurement on an uplink signal sent by user equipment.

Abstract: A radar imaging device having a mission to produce a radar image of a given target, comprising a step of determining the trajectory of the carrier of the imaging device comprises at least: a phase of determining a segment of trajectory for the picture capture, as a function of the position of the target and of the type of image to be produced, the picture capture segment being dedicated to the picture capture of the target by the imaging device; a phase of adding a segment of trajectory of stabilizing the carrier, situated upstream in the extension of the picture capture segment; a phase of addition of a segment of trajectory for homing the carrier onto the stabilizing segment.

Abstract: A FMCW radar system with a built-in self-test (BIST) system for monitoring includes a receiver, a transmitter, and a frequency synthesizer. A FMCW chirp timing engine controls timing of operations at least one radar component. The BIST system includes at least one switchable coupling for coupling a first plurality of different analog signals including from a first plurality of selected nodes in the receiver or transmitter that are all coupled to a second number of monitor analog-to-digital converters (ADCs). The second number is less than (<) the first plurality of different analog signals. The BIST system includes a monitor timing engine and controller operating synchronously with the chirp timing engine, that includes a software configurable monitoring architecture for generating control signals including for selecting using the switchable coupling which analog signal to forward to the monitor ADC and when the monitor ADC samples the analog signals.

Abstract: Techniques and apparatuses are described that enable radar attenuation mitigation. To improve radar performance, characteristics of an attenuator and/or properties of a radar signal are determined to reduce attenuation of the radar signal due to the attenuator and enable a radar system to detect a target located on an opposite side of the attenuator. These techniques are beneficial in situations in which the attenuator is unavoidably located between the radar system and a target, either due to integration within other electronic devices or due to an operating environment. These techniques save power and cost by reducing the attenuation without increasing transmit power or changing material properties of the attenuator.

Abstract: A precoding method is provided. The precoding method includes computing a relaxed beamforming matrix according to multiple desired channel correlation matrices and multiple interfering channel correlation matrices; computing an approximated beamforming matrix according to the relaxed beamforming matrix; computing multiple degradations corresponding to the data streams according to multiple relaxed beamforming vectors within the relaxed beamforming matrix and multiple approximated beamforming vectors within the approximated beamforming matrix; selecting a selected data stream index according to the degradations; decomposing a selected relaxed beamforming vector corresponding to the selected data stream index into a first vector and a second vector; and updating the approximated beamforming matrix according to the first vector and augmenting the approximated beamforming matrix according to the second vector, to obtain an updated-and-augmented beamforming matrix.

Abstract: There is a need for coupling, for example within an automation area, particularly critical subareas with less critical subareas of the automation area. The invention relates to a method and a network filtering device for filtering a data packet between a first network and a second network. According to the invention, a data packet is checked several times in parallel by means of a multiplier and a plurality of filtering devices.

Abstract: Wireless communications systems and methods related to mitigation of calibration errors are provided. A base station (BS) transmits, via an antenna array including a plurality of antenna elements, a first communication signal using a first number of the plurality of antenna elements and a first transmission power level to a user equipment (UE). The BS receives from at least one UE, a measurement report based on the first communication signal. The BS transmitting a second communication signal using a second number of the plurality of antenna elements and a second transmission power level based on the one or more measurement reports. At least one of the first number of the plurality of antenna elements is different from the second number of the plurality of antenna elements, or the first transmission power level is different from the second transmission power level. Other aspects and features are also claimed and described.

Abstract: A non-transitory computer-readable recording medium storing a program that causes a computer to execute a procedure to determine a feature of each standard of a wireless environment in which radio signals including a CSS signal chirp-modulated co-exist, the procedure includes obtaining a spectrum by subjecting each radio signal to fast Fourier transform with predetermined frequency resolution and time resolution capable of visualizing a feature of the CSS signal, coarsening the frequency resolution of the spectrum by adopting an effective value in a specific frequency domain, calculating a duration of the radio signal, based on the coarsened frequency resolution of the spectrum, coarsening the time resolution of the spectrum by adopting an effective value in the duration, calculating a bandwidth of the radio signal, based on the coarsened time resolution of the spectrum, and determining the feature of the radio signal of each standard, based on the duration and the bandwidth.

Abstract: According to some exemplary embodiments, the present disclosure is related in general to a soil moisture monitoring system comprising a first PVC pipe holding one or more sensing units, a top of the first PVC pipe mated to a “T” intersection, and a base of the “T” intersection mated to a rodent resistant cord. The first PVC pipe is generally round in shape with one or more flat surfaces of approximately six inches in length, each flat surface at an approximately 90 degree angle relative to a next closest flat surface. Each of the one or more sensing units further comprises a controller communicatively coupled between two antennas. In most exemplary embodiments, four sensing units may be vertically stacked on the first PVC pipe and configured to transmit eight separate directional radio frequencies into nearby dirt, each of the eight separate directional radio frequencies vertically spaced six inches apart.

Abstract: The present application relates to the technical field of luminaire, and provides a track head for mounting a lamp body on a track strip, the lamp body comprises a mounting rack, the track head comprises a cassette body fixed to the mounting rack and a cover body movably mounted on the track strip, the cover body is detachably mounted on the cassette body, a plurality of first resilient sheets which are electrically connected to the lamp body are provided in the inner part of the cassette body, a plurality of second resilient sheets which are electrically connected to the first resilient sheets respectively are provided in the inner side of the cover body, a conductive structure is provided between the cover body and the track strip for electrical interconnection with each other.

Abstract: A test arrangement for wirelessly testing a device under test comprises a number of test antennas that are placed in the near-field of the device under test for receiving wireless signals from the device under test and/or transmitting wireless signals to the device under test, a channel modifier coupled to the test antennas for weighting the signals received by the test antennas and/or the signals transmitted by the test antennas according to predetermined weighting parameters, and a near-field to far-field transformer that is coupled to the channel modifier and transforms the weighted signals received by the test antennas into far-field signals.

Abstract: Systems and methods for detecting biometrics using a life detecting radar are disclosed. Life detecting radars can include transmit antennas configured to transmit continuous microwave (“CW”) radio signals that reflect back upon making contact with various objects. The signal can be systematically varied in frequency to provide a signal that is essentially continuous with short gaps between transmissions at different frequencies. The reflected return signals are received by one or more receive antennas and processed to detect one or more targets. The received signal can include a static (i.e. constant phase) signal corresponding to reflections from objects that do not move. The received signal can also include a phase varying signal that corresponds to reflections from a living target having measurable biometrics including (but not limited to) breathing patterns and heartbeats. Clutter can be removed and the remaining portions of the received signal are analyzed for target detection.

Abstract: Methods and systems are provided for replacing hardware during active communications. A replacement circuit may be added into a communication system during active communications with a link peer, with a circuit being replaced handling signals communicated with the link peer. The replacement circuit may be configured to handle a first subset of the signals communicated with the link peer, with the circuit being replaced being configured to handle a second subset of the signals communicated with the link peer. Signals of the first subset and the second subset may differ based on at least one signal related attribute. After ensuring that the replacement circuit is operating correctly, the replacement circuit may be configured to handle all signals communicated with the peer link, and the circuit being replaced may be configured for removal. The replacement circuit and the circuit being replaced may interact during the replacement sequence.

Abstract: A radar system and method in a host system include a radar detector detecting reflected radar signals and converting the reflected radar signals into digital data signals. A motion detector detects motion of the host system and indicates velocity of the host system. A processor receives the digital data signals and processes the digital data signals to categorize the digital data signals into target categories, one of the target categories being an environmental clutter category, the processor associating each of a plurality of processed groups of the digital data signals with a velocity, one of the groups of digital data being associated with a first preselected velocity. When the velocity of the host system changes, if the velocity associated with the one of the groups of digital data of the environmental clutter category has not changed, then the processor indicates that the radar detector is at least partially blocked.

Abstract: The present invention is directed to a system and method for providing an estimated design specification as a function of a number of spatially separated far-field measurements and a predetermined design specification. The predetermined design specification corresponds to an antenna being in a properly configured and a properly excited state. The system maps the spatially separated far-field measurements into an estimated far-field antenna pattern of the antenna based on the estimated design specification. The system provides difference data based on a comparison of the predetermined design specification and the estimated design specification and can adjust the electrical excitation signals of the antenna in accordance with the difference data or the estimated far-field antenna pattern.

Abstract: A device for detecting objects such as mines placed in a zone to be explored, the device being placed on a vehicle moving at a velocity V and including a panel on which a radiation set is arranged to transmit signals at an illumination frequency and to receive signals reflected from the zone, and a processing circuit to provide information about the presence of the objects after processing of the reflected signals, wherein the radiation set includes an alignment of antennas arranged transverse to the velocity V of displacement of the vehicle.

Abstract: A method of calibrating transmit and/or receive paths of an antenna comprising at least two antenna columns, each of which comprising two co-located sub-arrays of antenna elements. The method includes the steps of transmitting a measurement signal on at least one of the antenna elements, and receiving a representation of the measurement signal on at least one other of the antenna elements, the representation comprising at least a mutual coupling component dependent on the mutual coupling between the at least one antenna element and the at least one other antenna element.

Abstract: A method and apparatus for improving a performance of an antenna system. An influence network is generated for an array of elements in the antenna system using a reconfiguration algorithm. The influence network indicates an influence of an undesired event occurring at any element in the array of elements on a remaining portion of the array of elements given a current state of the array of elements. A relative ranking of vulnerability is created for elements in the array of elements based on the influence network. The reconfiguration algorithm is modified to take into account the relative ranking of vulnerability to form a modified reconfiguration algorithm. The antenna system using the modified reconfiguration algorithm to compensate for undesired events improves the performance of the antenna system.

Abstract: The present invention relates to an apparatus and a method for controlling an alignment of a vehicle radar capable of automatically detecting a vertical angle of a target to perform an alignment in a vertical direction. The apparatus includes: a substrate; a transmitting antenna unit configured to be disposed at one side of the substrate; a receiving antenna unit configured to be disposed at the other side of the substrate; and a vertical angle detection unit configured to detect a vertical angle of a target based on a signal received from the receiving antenna unit, wherein the receiving antenna unit includes: a plurality of first antennas configured to be arranged in a row direction to a surface of the substrate; and a plurality of second antennas configured to be arranged in a column direction to the surface of the substrate.

Abstract: A circuit includes an RF oscillator coupled in a phase-locked loop. The phase-locked loop is configured to receive a digital input signal, which is a sequence of digital words, and to generate a feedback signal for the RF oscillator based on the digital input signal. The circuit further includes a digital-to-analog conversion unit that includes a pre-processing stage configured to pre-process the sequence of digital words and a digital-to-analog-converter configured to convert the pre-processed sequence of digital words into the analog output signal. The circuit includes circuitry configured to combine the analog output signal and the feedback signal to generate a control signal for the RF oscillator. The pre-processing stage includes a word-length adaption unit configured to reduce the word-lengths of the digital words and a sigma-delta modulator coupled to the word-length adaption unit downstream thereof and configured to modulate the sequence of digital words having reduced word-lengths.