Abstract: A method for implementing a relocatable Over-The-Horizon-Radar (OTHR) including transmitting mutually orthogonal signals on each of a plurality of antenna elements of a transmitting system, and receiving and decoding the signals at a plurality of receiving systems to synthesize beams from the orthogonal signals. Each receiving system has a plurality of antenna elements fewer in number than the plurality of antenna elements of said transmitting system. The method includes connecting as a network the transmitting system, the plurality of receiving systems, and a network controller.

Abstract: A radar transceiver includes a receiver. The receiver includes a low noise amplifier a mixer, a baseband filter, an integrator, and a phase shifter. The mixer includes an input coupled to an output of the low noise amplifier. The baseband filter includes an input coupled to an output of the mixer. The integrator includes an input coupled to an output of the baseband filter. The phase shifter includes a control input and an output. The control input is coupled to an output of the integrator.

Abstract: A radar device includes radar transmission and receiving circuits. The radar transmission circuit transmits one or more transmission signals, each having a transmission period Tr. The radar receiving circuit receives one or more reflected signals in which the transmission signals are reflected by an object and estimates a direction of the object based on the reflected signals. The radar transmission circuit includes Nt transmission antennas. A control circuit sets a transmission gap period between a first and second periods, with the transmission gap period being a period during which the transmission signals are not transmitted. The first period is equal to an integral multiple of a period Np, the period Np is equal to or more than Nt times the transmission period Tr, and the second period is set after the first period and is equal to an integral multiple of the period Np.

Abstract: A method for operating a stepped frequency radar system is disclosed. The method involves receiving digital frequency control signals that correspond to different frequencies of radio frequency (RF) signals, and performing stepped frequency scanning across a frequency range using at least one transmit antenna and a two-dimensional array of receive antennas and RF signals at the different frequencies that correspond to the digital frequency control signals.

Abstract: This document describes techniques and systems of a radar system with modified orthogonal linear antenna subarrays and an angle-finding module. The described radar system includes a first one-dimensional (1D) (e.g., linear) subarray; a second 1D subarray positioned orthogonal to the first 1D subarray; and a two-dimensional (2D) subarray. Using electromagnetic energy received by the first 1D subarray and the second 2D subarray, azimuth angles and elevation angles associated with one or more objects can be determined. The radar system associates, using electromagnetic energy received by the 2D subarray, pairs of an azimuth angle and an elevation angle to the respective objects. In this way, the described systems and techniques can reduce the number of antenna elements while maintaining the angular resolution of a rectangular 2D array with similar aperture sizing.

Abstract: A mobile device may be configured to improve measurement of carrier phase (CP) in received satellite signals for satellite positioning system (SPS) operations. For example, this may enable an SPS receiver to measure CP of at least a first positioning signal and a second positioning signal each received from the same satellite vehicle. A corrected CP of the first positioning signal may be estimated based on the measured CP of the first positioning signal and on the measured CP of the second positioning signal.

Abstract: A portable radar system that may leverage the processing power, input and/or display functionality in mobile computing devices. Some examples of mobile computing devices may include mobile phones, tablet computers, laptop computers and similar devices. The radar system of this disclosure may include a wired or wireless interface to communicate with the mobile computing device, or similar device that includes a display. The radar system may be configured with an open set of instructions for interacting with an application executing on the mobile computing device to accept control inputs as well as output signals that the application may interpret and display, such as target detection and tracking. The radar system may consume less power than other radar systems. The radar system of this disclosure may be used for a wide variety of applications by consumers, military, law enforcement and commercial use.

Abstract: The present application discloses a location detection method, an apparatus, a device and a readable storage medium, which relate to vehicle infrastructure cooperation and automatic driving in intelligent transportation. A specific implementation solution is as follows: after acquiring an initial location of a target object, a millimeter wave radar projects the initial location onto an upper interface and a lower interface of a road section respectively to obtain a first projection location and a second projection location, and then determines an accurate location of the target object according to the first projection location and the second projection location. In this process, the initial location is mapped twice to make full use of an association relationship between an installation point and installation environment, so that the target location is no longer an approximate location, but a precise location obtained according to geometric projection, which improves accuracy of location detection.

Abstract: An anti-interference microwave detection module processes frequency-selection for reducing the interferences from the electromagnetic radiation of the frequency bands different from the frequency band of the anti-interference microwave detection module in the environment to the echo signal of the anti-interference microwave detection module. A Doppler intermediate-frequency signal is trend processed to obtain a fluctuation signal. The characteristic parameter of the fluctuation of the fluctuation signal is corresponding to the characteristics of the movement of the object in the detection space, so that the anti-interference microwave detection module is able to completely reflect the characteristics of the movement of the object in the detection space and reduce the interferences of the electromagnetic radiation in the environment, including the interferences of the electromagnetic radiation of the same frequency band of the anti-interference microwave detection module, to the fluctuation signal.

Abstract: A need exists for a method to do monopulse tracking with a single beam phased array antenna. With a monopulse tracker antenna, the satellite, or moving target, will have a beacon signal that the tracker can acquire. The beacon signal may be a preamble in the transmitted signal from the satellite. The monopulse tracker antennas are scanned over the volume, minimizing the error signal. When the error signal is minimal, the antenna is pointed in the direction of the satellite or moving target. Because the tracker needs to know direction offsets in both azimuth and elevation planes, error signals from both planes are needed. The monopulse tracker antenna maintains a radio frequency link to the beacon signal, causing the antenna to lock in the direction of the satellite when the error signal is minimized to zero.

Abstract: For example, a radar processor may be configured to determine a first 1D AoA spectrum corresponding to a first dimension of an Azimuth-Elevation domain based on radar Rx data, to determine a second 1D AoA spectrum corresponding to a second dimension of the Azimuth-Elevation domain based on the radar Rx data, to detect one or more first object hypotheses in the first dimension based on the first 1D AoA spectrum, to detect one or more second object hypotheses in the second dimension based on the second 1D AoA spectrum, to determine a plurality of 2D object hypotheses corresponding to the Azimuth-Elevation domain based on the first object hypotheses and the second object hypotheses, and to generate 2D AoA information based on a 2D AoA spectrum analysis of the radar Rx data according to the plurality of 2D object hypotheses.

Abstract: In a radar apparatus of the present invention, a ghost deciding unit decides whether or not a first condition that a first object candidate and a second object candidate are in the same direction with respect to the transmission/reception unit is satisfied, and then decides whether or not a second condition that, of the first and second object candidates, a reflection power from the first object candidate located farther away from the transmission/reception unit is smaller than a reflection power from the second object candidate located closer to the transmission/reception unit is satisfied. The ghost deciding unit decides that only when the first condition and the second condition are satisfied, the first object candidate is a ghost.

Abstract: An image generating device for a radar includes a receiving module configured to receive a radar signal from an antenna and process the radar signal to generate an echo, an edge image generator configured to generate an edge echo image based on the echo acquired at a first time instance, a projected image generator configured to generate a projected echo image based on the echo acquired at a second time instance, and a superimposition generator configured to superimpose the edge echo image on the projected echo image based on the first and second time instances, to generate a superimposed echo image.

Abstract: In a mobile part having at least one module, and a method for operating a mobile part, the mobile part is able to be moved on a driving surface, and the module includes a controllable illumination device. The illumination device is provided and/or situated in elongated form along a planar curve, in particular, a line.

Abstract: Embodiments of the present invention provide a method, system and computer program product for bit transition enhanced direct position estimation (DPE) from global navigation satellite system (GNSS) signals and includes the reception in a GNSS receiver of signals from multiple, different satellites in multiple satellite constellations adapted for use with the GNSS. The method estimates the GNSS receiver parameters position, velocity, clock bias, clock drift, and optionally and if unknown, the receiver time. The method generates a model of the received GNSS signals that depends on the receiver parameters. Uniquely, the method includes the synchronization of both a primary code and also a secondary code in the received GNSS signal model, in addition to time delays, Doppler shifts, and other relevant parameters for positioning. Finally, if the secondary code of a particular signal is unknown, the method determines the combination of bit transitions that maximizes the optimization problem.

Abstract: The present disclosure provides a phase shifter, an antenna including the phase shifter, and a control method of the phase shifter. The phase shifter includes a first base substrate; a plurality of microstrip lines arranged on the first base substrate and configured to transmit an electromagnetic wave signal and apply a common voltage; a dielectric layer arranged on a side of the plurality of microstrip lines away from the first base substrate; and a plurality of separate voltage control layers correspondingly arranged with the plurality of microstrip lines respectively on a side of the dielectric layer away from the first base substrate. The separate voltage control layers are configured to apply a control voltage. A dielectric constant of the dielectric layer varies with the control voltage applied to the voltage control layers and the common voltage applied to the microstrip lines.

Abstract: This document describes techniques and systems to enable a radar system to detect angles in bistatic and monostatic scenarios. In some examples, an automotive radar system includes one or more processors. The processors can obtain electromagnetic (EM) energy reflected by objects and generate, based on the reflected EM energy, a two-dimensional (2D) data matrix. The 2D data matrix has a number of rows corresponding to the number of antenna elements in a transmitter array and a number of columns corresponding to the number of antenna elements in a receiver array. Using the 2D data matrix, the processors can determine DoA estimates and DoD estimates in monostatic and bistatic scenarios. By comparing the DoA estimates to the DoD estimates, the processors can determine an angle associated with the objects. In this way, the described techniques and systems can enable angle detection in monostatic and bistatic conditions with improved angular resolution and reduced cost.

Abstract: A system and method for identifying damage to an embankment includes acquiring satellite imagery of an area of the embankment, generating a set of input data from the satellite imagery, removing at least one anomaly in the set of input data to obtain a cleaned set of input data, and identifying the damage by determining a dam motion area indicative of ground motion in the embankment from the cleaned set of input data and determining an anomalous vegetation area and an anomalous wetness area indicative of seepage in the embankment from the cleaned set of input data.

Abstract: A low-profile, ultra-wideband, conformal antenna is actively driven by a four-port quadrature feed circuit for both cardioid and monopole radiation patterns. The quadrature four-port and differential two-port driven radiating elements are organized into a log periodic array that is driven without frequency dispersion. The log periodic array may produce circularly polarized beams. For radiating elements that do not operate via a ground plane, stepped artificial magnetic conductors isolate the drive circuitry.

Abstract: A system and method for detecting a suspicious object, including a wireless signal transmitter with first and second transmitter antennas, a first wireless signal receiver on an opposite side of the object from the transmitter having first and second receiver antennas, and a second wireless signal receiver on a same side of the object as the transmitter having a third receiver antenna. The transmitter may emit wireless signals from each of the transmitter antennas. The signals emitted by the first transmitter antenna may be received at the first and second receiver antennas. The signals emitted by both transmitter antennas may be received at the third receiver antenna. The object's material type may be determined based on channel state information of the wireless signals received at first receiver. A size of the object may be determined based on channel state information of the wireless signals received at the second receiver.