Disclosed is an apparatus for tracking an object based on radar image reconstruction, the apparatus including a two-dimensional image producing unit configured to produce a two-dimensional image by collecting multiple one-dimensional radar signals from which clutter is removed, an object detecting unit configured to determine the presence or absence of an object from the two-dimensional image and estimate a two-dimensional position of the present object, and an object tracking unit configured to track a movement path of the object based on the two-dimensional position estimated by the object detecting unit.

When a combination of a plurality of sensors is used for obstacle detection, the present invention is to detect the relative positions of the sensors, to correct inter-sensor parameters, and to provide accurate obstacle detection. This calibration system is provided with a first landmark detecting unit for detecting the position of a first landmark from three-dimensional shape information; a landmark associating unit for determining a correspondence relation, between the first landmark position detected by the first landmark detecting unit and an attachment position to the vehicle of the first landmark estimated by a vehicle landmark relative position estimating unit; and a vehicle sensor relative orientation estimating unit for estimating the relative position and orientation of the vehicle and a first measurement section based on the information from the vehicle landmark relative position estimating unit and a landmark associating unit.

A radar transmitter comprises orthogonal frequency division multiplexing (OFDM) symbol generation circuitry, windowing circuitry, and control circuitry. The OFDM symbol generation circuitry is operable to modulate data onto a plurality of subcarriers to generate a plurality of OFDM symbols. The windowing circuitry is configurable to support a plurality of windowing functions. The control circuitry is operable to analyze returns from a previous transmission of the radar transmitter to determine characteristics of the environment into which the previous transmission was transmitted. The control circuitry is operable to select which one of the plurality of windowing functions the windowing circuitry is to apply to each of the plurality of OFDM symbols based on the characteristics of the environment. A first one of the windowing functions may correspond to a first radiation pattern and the second one of the windowing functions may correspond to a second radiation pattern.

A radar system configured to determine radar-ground distance measurements. The radar system includes transmission and reception means configured to transmit two radiofrequency signals towards the ground and to receive the signals obtained by the reflection of the two transmitted signals by the ground and computation means configured to determine the frequential representations of the transmitted signals and of the received signals and determine a frequential quantity as a function of the frequential representations. The radar system is wherein the computation means are configured to sample the frequential quantity over a determined number of samples, which provides a sampled signal; determine a number of frequency measurements as a function of a constant distance measurement accuracy value; determine frequency measurements by applying to the sampled signal a spectral decomposition by fast Fourier transform using a decimation of the sampled signal in a ratio dependent on the distance measurement accuracy value, and determine a distance measurement corresponding to each frequency measurement.

Systems and methods for ship motion forecasting are described herein. These ship motion forecasting systems can enable accurate real-time forecasting of waves and resultant vessel motions, and the useful displaying of such forecasts to users. In general, the ship motion forecasting systems and methods provide users with useful indications of ship motion forecasts by generating scrolling graphical representations of the ship motion forecasts. For example, the systems can be implemented to display on a first window portion a plurality of graphical representations of ship motion forecasts generated over a plurality of forecast cycles, where the graphical representations of new ship motion forecasts are added as generated, and where the graphical representations of previously generated ship motion forecasts are scrolled as new ship motion forecasts are added.

Ship motion forecasting systems and methods are described herein that can enable accurate real-time forecasting of ocean waves and resultant ship motions. Such systems and methods can be used to improve the efficiency and safety of a variety of ship operations, including the moving of cargo between ships at sea. In general, the systems and methods transmit radar signals from multiple radars, and those radar signals from the multiple radars are reflected off the surface of a body of water. The reflected radar signals are received, and radar data is generated from the received radar signals. The radar data is used to generate ocean wave components, which represent the amplitude and phase of a multitude of individual waves that together can describe the surface of the ocean. These ocean wave components are then used generate ship motion forecasts, which can then be presented to one or more users.

The present invention discloses mm-wave radar sensor system and its method of operation, comprising utilization of the passive markers, being placed on known objects. The proposed system can track distance and 3D orientation of the known objects under observation, can differentiate the shape classes of the previously passively marked known objects, and can improve navigation redundancy and autonomous driving in pre-defined environments, by using passive markers being placed on the traffic environment. Generic object can also be human being, having cloths having passive markers.

A data fusion system for combining and parsing data from multiple EO and RF threat warning systems, the system including a plurality of input systems capable of providing feature-level data about an environment in which they are operating. Each input system may be configured to output information regarding its capabilities and the environment in which it is operating. A fusion block is placed in operative communication with the plurality of input systems and battlespace information and configured to algorithmically combine the data and determine the presence or absence of a threat. An output may be placed in operative communication with the fusion block, thereby allowing the fusion block to provide information and/or notifications to the relevant parties and/or systems.

A method of determining facial location and orientation may include receiving a location of a first radio frequency (RF) tag on a subject; receiving a location of a second RF tag on the subject; determining a location and orientation of a face of the subject using at least the location of the first RF tag and the location of the second RF tag; and sending commands to one or more camera units. The commands may cause the one or more camera units to capture the location and orientation of the face of the subject.

A boat stabilization system includes a first radar unit constructed and arranged to be associated with a port side of a boat so as to obtain wave data of a port side wave prior to the port side wave contacting the port side of the boat. A second radar unit is constructed and arranged to be associated with a starboard side of the boat so as to obtain wave data of a starboard side wave prior to the starboard side wave contacting the starboard side of the boat. A control unit is connected with each of the first and second radar units and constructed and arranged to develop, based on the wave data of the port side wave and the starboard side wave, a three-dimensional wave map. The control unit is constructed and arranged to control a boat stabilizing device based on the wave map.