A chip-implementation of a millimeter wave MIMO radar comprises transmitters for transmitting short bursts of digitally modulated radar carrier signals and receivers for receiving delayed echoes of those signals. Various signal formats defined by the number of bits per transmit burst, the transmit burst duration, the receive period duration, the bitrate, the number of range bins, and the number of bursts per scan, facilitate the choice of modulating bit patterns such that when correlating for target echoes over an entire scan, the correlation codes for different ranges and different transmitters are mutually orthogonal or nearly so as compared to a random selection of codes. In the event of imperfect orthogonality, the subtraction of strong already-detected target signals allows for better detecting of weaker signals or moving targets that are rendered non-orthogonal by their Doppler shift.

Radar installation and calibration systems and methods are provided. In one example, a controller of a radar system receives installation parameters associated with an installation of a radar system. A present orientation of a radar device of the radar system is determined and compared to the installation parameters to determine a deviation of the present orientation from the installation parameters. The deviation is sent to a coordinating device associated with the radar device to cause the deviation to be outputted as installation feedback through the coordinating device. Related systems and methods are also provided.

A method and device for suppressing range ambiguity and a computer readable storage medium are provided. The method includes: determining a pulse timing relationship of a transmission signal; determining orthogonal nonlinear frequency modulation signals; modulating the transmission signal by using the orthogonal nonlinear frequency modulation signals; transmitting the modulated transmission signal according to the pulse timing relationship, and determining echo data of the modulated transmission signal; and generating an image according to a polarization scattering matrix for the echo data of the modulated transmission signal.

A system includes a moveable element adapted to move relative to a coordinate system defined for a robot, an object detection transceiver unit adapted to be mounted on the moveable element, and a controller. The controller controls the object detection transceiver unit to emit a signal and obtain a return signal for an operational cell of the robot at each of a series of predetermined positions to emulate a transceiver aperture larger than an aperture of the object detection transceiver unit. A location corresponding to a marker present in the operational cell is determined from the return signals. A predetermined operation is carried out where the predetermined operation includes using the determined location to guide movement of the robot.

A system includes a moveable element adapted to move relative to a coordinate system defined for a robot, an object detection transceiver unit adapted to be mounted on the moveable element, and a controller. The controller controls the object detection transceiver unit to emit a signal and obtain a return signal for an operational cell of the robot at each of a series of predetermined positions to emulate a transceiver aperture larger than an aperture of the object detection transceiver unit. A location corresponding to a marker present in the operational cell is determined from the return signals. A predetermined operation is carried out where the predetermined operation includes using the determined location to guide movement of the robot.

Provided is a distance measuring device which allows the measurement accuracy to be improved while the memory size is reduced. A distance measuring device includes a light emitting element which emits range-finding light as pulse light, a light receiving element which receives reflected range-finding light obtained as the range-finding light is reflected on a measurement object, an AD converter which converts the light reception signal output from the light receiving element from an analogue signal to a digital signal, multiple memories which have different memory sizes from each other and store sampled data output from the AD converter, and a rough distance calculator which calculates a distance on the basis of the sampled data stored in the multiple memories.

Provided is a distance measuring device which allows the measurement accuracy to be improved while the memory size is reduced. A distance measuring device includes a light emitting element which emits range-finding light as pulse light, a light receiving element which receives reflected range-finding light obtained as the range-finding light is reflected on a measurement object, an AD converter which converts the light reception signal output from the light receiving element from an analogue signal to a digital signal, multiple memories which have different memory sizes from each other and store sampled data output from the AD converter, and a rough distance calculator which calculates a distance on the basis of the sampled data stored in the multiple memories.

Disclosed is a compact integrated apparatus of an interferometric radar altimeter (IRA) and a radar altimeter (RA) capable of performing individual missions by altitude, which includes: a plurality of antennas; a signal processing control unit selecting an RA mode at a low altitude and selecting an IRA mode at a high altitude based on a mode threshold and selecting an FMCW waveform at the low altitude and selecting an FM pulse waveform at the high altitude based on a waveform threshold; and a transceiving unit transmitting a signal by a first antenna positioned at an outermost portion among the plurality of antennas and receiving a signal by an nth antenna positioned at another outermost portion among the plurality of antennas in the RA mode and transmitting a signal through the first antenna and receiving signals through the plurality of antennas in the IRA mode.

A retrofit system applied to existing FMCW radars in order to convert them into pulsed linear frequency-modulated radars with the ability to dynamically switch between two pulsed modes and an FMCW mode based on the estimated range of a target. This retrofit also includes provisions for adaptively configuring chirp and sweep parameters to optimize range resolution. The result is a retrofit system capable of converting an FMCW radar into a dual pulsed mode radar with adaptive sweep configuration.

A method and a system for locating underground targets by using radar signals emitted from a radar transmitter coupled to a transmitter antenna, and echoed signals collected from a target by a radar receiver coupled to a transmitter antenna. The radar signals are collected via the receiver antenna which translates above ground along a closed course in cooperation with the transmitter antenna. The radar signals are processed in correlation with time and with a respective momentaneous location of the receiver antenna and the location of the transmitter antenna. The transmitter antenna is disposed on a land borne platform and the receiver antenna is disposed on the same land borne platform or on another land borne platform or on an airborne platform. The land borne platform and the airborne platform are selected as a mobile platform, a driver guided platform, a remotely guided platform, or an autonomously guided platform.