According to one embodiment, a system includes first to fourth transmission antennas, a plurality of reception antennas, and a processor. The processor is configured to acquire a first signal of radio waves which are transmitted by the first and third transmission antennas in a case where the measurement target is at a first position, acquire a second signal of radio waves which are transmitted by the second and fourth transmission antennas in a case where the measurement target is at a second position, and generate information of the measurement target by using the first and second signals. A first interval between the first and third transmission antennas and a second interval between the second and fourth transmission antennas are the same.

A data generation device is provided with environment setting means (200), model setting means (210), image calculation means (220) and data output means (230). The environment setting means sets a radar parameter that indicates a specification of a radar that is a synthetic aperture radar or an inverse synthetic aperture radar. The model setting means sets a three-dimensional model that indicates a shape of a target object to identify. The image calculation means calculates a simulation image based on the three-dimensional model and the radar parameter. The data output means outputs training data in that the simulation image and a type of the target object are associated to each other. In addition, the data output means outputs difference data that indicate a difference between a radar image and the simulation image. The model setting means changes the three-dimensional model based on model correction data inputted based on the difference data.

A radar signal imaging device 30 includes: a transmission unit 31 which transmits a radar signal toward an object to be imaged that is a non-rigid body; a position estimation unit 32 which estimates the position of the object; an oscillation degree estimation unit 33 which estimates an oscillation degree which is a degree of change within a predetermined period in the relative positions of feature points constituting the object; and a synthetic aperture processing unit 34 which performs synthetic aperture processing on the radar signal reflected by the object on the basis of the estimated position of the object and the estimated oscillation degree.

Systems and method are provided for three-dimensional (3D) imaging by using Doppler and interferometric processing techniques for general planar phased arrays. Systems and methods according to embodiments of the present disclosure incorporate motion compensation techniques in a way that utilizes the full aperture of a phase array. Embodiments of the present disclosure can be applied to a variety of different radar imaging modalities, including X-band and millimeter wave (MMW) regimes.

A method of imaging within an absorptive object comprising: placing transmit and receive antennas in close proximity to a surface of said object; transmitting electromagnetic pulses from the transmit antenna into the object; and receiving a receive signal at the receive antenna simultaneously with the transmit antenna transmitting said pulses; wherein the transmitting and receiving comprises the following steps: a) setting a threshold level for the receive signal strength; b) transmitting one or more pulses; c) comparing the receive signal for said one or more pulses with the threshold level; d) changing the threshold level; e) repeating steps b), c) and optionally d) one or more times. This arrangement can operate at extremely high speed due to the absence of any slow multi-bit ADCs.

Systems and methods are provided for autonomous airborne vehicle control using a millimeter-wave (MMW) radar. Embodiments of the present disclosure enable a MMW radar system to support an unmanned aerial vehicle (UAV) in accomplishing missions involving interacting with peers. In an embodiment, a MMW radar module of a UAV in accordance with an embodiment of the present disclosure enables the UAV to take a measurement (e.g., regarding the location of another UAV) using the MMW radar, classify a return (e.g., a MMW radar return), determine whether the detected object is a peer, and update the vehicle velocity accordingly.

A millimeter-wave real-time imaging based safety inspection system and safety inspection method. The safety inspection system includes a conveying device (10), a millimeter wave transceiver module (11), an antenna array (17, 18), a switch array (16a, 16b), a switch control unit (15a, 15b), a quadrature demodulation and data acquisition module (12), and an image display unit (13). By using an Inverse Synthetic Aperture Radar (ISAR) imaging principle, the millimeter-wave real-time imaging based safety inspection system performs real-time imaging on an object to be inspected when the object moves, so that not only the imaging speed is improved, but also the field of view is enlarged. A safety inspector can determine whether an inspected person carries dangerous goods by observing a three-dimensional diagram of the inspected person, thereby eliminating the inconvenience caused by back-and-forth movement of a safety inspection device used by the safety inspector around the inspected person.

Systems and methods for radar systems to produce a radar image of a region of interest (ROI with targets. Sensors to transmit source signals to the ROI and to measure echoes reflected back from the targets corresponding to the transmitted source signals. A processor to calculate an estimate of a noisy and a partial Euclidean Distance Matrix (EDM) of the sensors and the targets. Decompose the noisy and the partial EDM into a low rank EDM that corresponds to locations to actual sensors and target locations, and a sparse matrix of distance errors, using a constrained optimization process. The low rank EDM is mapped into the sensors and the targets locations, to obtain estimated actual sensor locations. Implement an inverse imaging process using the estimated actual sensor locations and the received data, to produce the radar image to output to a communication channel.

A constellation of satellites and associated methods for Earth Observation are disclosed. One method includes transmitting a set of at least four signals towards the Earth using a constellation of at least four satellites and receiving a set of at least four reflected signals from the Earth using the constellation. The method also includes analyzing, using a set of at least four signal analyzers, the set of at least four signals to generate a set of data. Each satellite in the constellation individually houses a signal analyzer in the set of at least four signal analyzers. The method also includes deriving the set of Earth observations using the set of data. Each satellite receives a signal in the set of at least four signals from every other satellite in the constellation.

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.