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: A device comprising: a substrate; a semiconductor die mounted on the substrate; a transmit antenna fabricated on the substrate and configured to transmit radio-frequency (RF) signals at least at a first center frequency; a receive antenna fabricated on the substrate and configured to receive RF signals at least at a second center frequency different than the first center frequency; and circuitry integrated with the semiconductor die and configured to provide RF signals to the transmit antenna and to receive RF signals from the receive antenna.

Abstract: A signal demodulation device includes an IQ mixer, a differential element and a signal processor. The IQ mixer is configured to output a first mixed signal and a second mixed signal. The differential element is electrically connected to the IQ mixer for receiving the first and second mixed signals and configured to differentiate the first and second mixed signals and output a first derivative signal and a second derivative signal. The signal processor is electrically connected to the differential element for receiving the first and second derivative signals and configured to demodulate the first and second derivative signals and output a first demodulated signal.

Abstract: A method and system for identifying an object in one space monitored by at least one radar transceiver. The method comprises storing intervals of critical distance values (10) associated with the position of a fixed object upon which a time-varying radio signal shadow may be generated, which may be confused with a moving object. Through successive radar detections, the signals are processed and generate a measurement range profile (40), from which a background range profile (41) is extracted to obtain an object range profile (50). The distance of a possible detected object (60) is determined from the analysis of the object range profile. If the distance of the object (4) is external to the critical intervals (51), the object is classified as valid (55). If the distance is internal to the intervals, the detected object may be a shadow and unless further checks are performed, its presence is not indicated.

Abstract: An enhanced LOng RAnge Navigation (eLORAN) system may include a plurality of eLORAN transmitter stations, and at least one eLORAN receiver device. The eLORAN receiver device may include an eLORAN receive antenna, an eLORAN receiver coupled to the eLORAN receive antenna, and a controller coupled to the eLORAN receiver. The controller may be configured to cooperate with the eLORAN transmitter stations to determine an eLORAN receiver position and receiver clock error corrected from additional secondary factor (ASF) data, the ASF data based upon different geographical positions and different times for each different geographical position.

Abstract: A multiple scalable radar on chip (SROC) based system in a multi-array configuration; may include: a first SROC; and a second SROC. The first SROC may include a ramp generator, a fractional-N PLL synthesizer, a frequency multiplier, a power amplifier, ‘Y’ number of transmitter chains, ‘Z’ number of receiver chains, and a receiver section. The second SROC may include a ramp generator, a fractional-N PLL synthesizer, a frequency multiplier, a power amplifier, ‘Y’ number of transmitter chains, ‘Z’ number of receiver chains, and a receiver section. The ramp generator of the first SROC may be configured to drive the fractional-N PLL synthesizer of the second SROC. The fractional-N PLL synthesizer of the second SROC may be configured to produce radio frequency (RF) ramp signals to drive both the first and second SROCs. ‘Y’ and ‘Z’ may represent positive integers.

Abstract: Context sensitive communication augmentation is disclosed. A user equipment (UE) can receive a trigger related to determining a context of a UE. The trigger can be manual, automatic, or remote. In response to receiving the trigger, the context of the UE can be determined based on sensor data. The sensor data can be received from a sensor of the UE or another sensor. Based on the context of the UE, a metric related to a communication modality of the UE can be determined. The metric can be communicated to another device. Information related to the context of the UE, including location information, can be communicated to the other device. A communication modality can be selected based on the metric relate to the UE and communication modalities of the other device. The metric can be updated based on changes in the context of the UE, allowing for updating the communication modality.

Abstract: The embodiments described herein provide ranging capabilities in RF-opaque environments, such as a jungle, utilizing transponders located on a property line. In particular, the embodiments described herein provide for determining a perpendicular distance to a property line from a ranging device. The transponders are located on the property line and a separated from each other by a known distance. The ranging device transmits RF signals to the transponders, which are received by the transponders and re-broadcasted back to the ranging device on a different frequency. The ranging device uses information about the transmitted and received RF signals and the known distance to calculate a perpendicular distance from the ranging device to the property line.

Abstract: An FM-CW radar includes a high frequency circuit that receives a reflected wave from a target, and a signal processing unit that converts an analog signal generated by the high frequency circuit into a digital signal and detects at least a distance to the target and velocity of the target. The high frequency circuit includes a VCO that receives a modulation voltage from the signal processing unit and generates a frequency-modulated high frequency signal. The signal processing unit includes an LUT that stores default modulation control data. The signal processing unit applies a default chirp having a linear characteristic, calculates an initial frequency value and an initial voltage value from a voltage-frequency characteristic manifested by the application of the default chirp, generates time data using a result of the calculation, and updates the data stored in the LUT with the time data generated.

Abstract: Methods of checking the integrity of the estimation of the position of a mobile carrier are provided, the position being established by a satellite-based positioning measurement system, the estimation being obtained by the so-called “real time kinematic” procedures. The method verifies that the carrier phase measurement is consistent with the code pseudo-distance measurement. The method comprises a step of calculating the velocity of the carrier, at each observation instant, a step of verifying that at each of the observation instants, the short-term evolution of the carrier phase of the signals received on each of the satellite sight axes is consistent with the calculated velocity and a step of verifying that at each of the observation instants, the filtered position obtained on the basis of the long-term filtered measurements of pseudo-distance through the carrier phase is dependable.

Abstract: Provided are systems, methods, and computer-readable storage media for improving accuracy of GPS in luminaires. For example, in one embodiment, there is provided a method that includes receiving, at a controller coupled to a luminaire, a GPS message. The method further includes extracting information from the GPS message, the information including data associated with a plurality of coordinates. Furthermore, the method can include determining, based on the information and not from the coordinates, an error associated with each coordinate of the plurality of coordinates. The method can also include discarding coordinates for which the error fails to satisfy a predetermined condition. Moreover, the method can include selecting, as a location of the luminaire, the coordinates for which the error satisfies the predetermined condition.

Abstract: A tunable dielectric metamaterial device for radar sensing comprises at least one metamaterial layer a plurality of electrically conductive electrodes and a plurality of electrically conductive control lines. The metamaterial layer includes a plurality of dielectric resonators comprising tunable material, wherein at least one electromagnetic property of the tunable material varies with an externally controllable electric field applied to it. Two distinct electrically conductive electrodes each are arranged in a spaced manner at any one of the dielectric resonators to cover the dielectric resonator. The electrically conductive control lines are configured for controlling the electric field to be applied to the tunable material, wherein each electrically conductive line is electrically connected to an electrically conductive electrode.

Abstract: A filter apparatus has a first filter and a second filter. The first filter receives at least an up signal of a non-linear signal of which a single cycle is a predetermined period that includes an up interval and a down interval. In the up interval, a signal level non-linearly rises along a time axis. In the down interval, the signal level non-linearly falls along the time axis. The up signal is a signal in the up interval of the non-linear signal. The first filter performs linearization of the received up signal by improving linearity of the received up signal. The second filter receives at least a down signal of the non-linear signal. The down signal is a signal in the down interval of the non-linear signal. The second filter performs linearization of the received down signal by improving linearity of the received down signal.

Abstract: A multi radiator antenna comprising an electrically conductive reflector, at least two radiating elements arranged on said reflector, a feeding network connected to the radiating elements, and a protective cover. The feeding network comprises a plurality of conductors for distributing signals to the radiators. The feeding network has means for adjusting relative phases of said signals in order to adjust a direction of the antenna main lobe of said multi-radiator base station antenna. The means for adjusting is provided with, or is connected to, an indicating portion configured to provide a visual indication of said direction. The protective cover is provided with an at least partially transparent wall portion arranged such that said indicating portion is visible there through.

Abstract: A method comprising receiving, by an apparatus, global-positioning-system data from a plurality of global-positioning-system satellites, determining a measured satellite pseudorange for each global-positioning-system satellite of the plurality of global-positioning-system satellites based, at least in part, on the global-positioning-system data, receiving, by the apparatus, of non-global-positioning-system data from at least one sensor, determining an apparatus position of the apparatus based, at least in part, on the non-global-positioning-system data, the determination of the apparatus position being absent consideration of any global-positioning-system data, determining at least one pseudorange correction associated with at least one global-positioning-system satellite of the plurality of global-positioning-system satellites based, at least in part, on the measured satellite pseudorange and the apparatus position, and causing broadcast transmission of information indicative of the pseudorange correction is

Abstract: A vehicle exterior environment recognition apparatus includes radar, a locus calculator, a lane shape recognizer, a rate-of-coincidence calculator, and a three-dimensional object reality determiner. The radar makes distance measurement of a three-dimensional object outside an own vehicle, and outputs a representative point that indicates a relative position of the three-dimensional object to the own vehicle. The locus calculator calculates a locus of the representative point within a set range. The lane shape recognizer recognizes a lane shape of a lane corresponding to the representative point. The rate-of-coincidence calculator calculates a rate of coincidence of a shape of the locus of the representative point with the lane shape. The three-dimensional object reality determiner determines, on the basis of the rate of coincidence, whether or not the three-dimensional object corresponding to the representative point is real.

Abstract: The present invention provides an amplitude comparison monopulse radar system. The system comprises a beam forming network for coupling to the phased array antenna. The beam forming network is adapted to change the phase delays between the antenna elements in a phased array antenna such that the monopulse radiation pattern is scanned over an angular range through space.

Abstract: A method of using a multi-input multi-output (MIMO) antenna array for high-resolution radar imaging and wireless communication for advanced driver assistance systems (ADAS) utilizes a MIMO radar and at least one base station. The MIMO radar establishes wireless communication with the base station via an uplink signal. Likewise, the base station sends a downlink signal to the MIMO radar. Further, unlike conventional vehicle-to-everything (V2X) systems that filter the reflected uplink signal, the MIMO radar uses the reflected uplink signal to detect a plurality of targets. Accordingly, the MIMO radar derives spatial positioning data for each target from the reflected uplink signal.

Abstract: An electronic apparatus includes communication circuitry and processing circuitry. The communication circuitry receives first and second wireless signals from a first terminal when the electronic apparatus reaches first and second measurement points. The communication circuitry receives third and fourth wireless signals from a second terminal when the electronic apparatus reaches third and fourth measurement points. The processing circuitry estimates one or more first candidates of a position of the first terminal and one or more second candidates of a position of the second terminal. The processing circuitry specifies the position of the first terminal and the position of the second terminal.

Abstract: A transponder system is presented, comprising first and second antenna arrays each comprising a plurality of antenna elements arranged in a predetermined geometry. The antenna elements of the first antenna array are respectively interconnected with corresponding antenna elements of the second antenna array by respective connection lines thereby forming plurality of receiving-transmitting pairs of antenna elements. A receiving-transmitting pair is configured to receive an input electro-magnetic signal by one antenna element thereof and transmit a corresponding output signal by the other antenna element, thereby enabling collective collection of a signal waveform and transmission of a corresponding output signal waveform. The first and second antenna arrays are rotatable with respect to one another about at least one predetermined rotation axis, thereby enabling variation of direction of propagation of the output signal waveform with respect to direction of propagation of the collected signal waveform.