A method includes generating an initial radar track using radar data and initial radar parameters and an initial camera track using image angular position data, initial camera parameters, and the radar range data in combination with calculating correction parameters to be applied to one of the radar data and the image data by comparing positions for the object from the initial radar track and the initial camera track, the first correction parameters being selected so that, when applied to the data from the other of the radar and the camera, to generate a first corrected track, a degree of correspondence between the first corrected track and the track of the other of the radar and camera is higher than a degree of correspondence between the initial radar track and the initial camera track.

A vehicle having a communication system is disclosed. The system includes two electrical couplings, coupled by way of a rotary joint having a bearing waveguide. Each electrical coupling includes an interface waveguide configured to couple to external signals. Each electrical coupling also includes a waveguide section configured to propagate electromagnetic signals between the interface waveguide and the bearing waveguide of the rotary joint. Additionally, the rotary joint is configured to allow one electrical coupling to rotate with respect to the other electrical coupling. An axis of rotation of the rotary joint is defined by a center of a portion of the waveguides. Yet further, the rotary joint allows electromagnetic energy to propagate between the waveguides of the electrical couplings.

Disclosed herein are embodiments that relate to phase coded linear frequency modulation for a radar system. Embodiments include transmitting at least two signal pulses. The transmitting includes transmitting a first pulse with a first phase modulation and a first chip rate, and transmitting a second pulse with a second phase modulation and a second chip rate. The second chip rate may be different than the first chip rate. Embodiments also include receiving a signal that includes at least two reflection signals associated with reflection of the at least two transmitted signal pulses. Embodiments further include processing the received signal to determine target information. The processing includes filtering the received signal to time-align the at least two reflection signals. The filtering includes applying a frequency-dependent time delay to one or more of the at least two reflection signals. Additionally, embodiments include removing phase code modulations from the time-aligned reflection signals.

A method for determining the complex impedance between a first stage and a second stage in a microwave system includes detecting an incident signal emitted by the first stage and detecting a reflected signal reflected from the second stage. The magnitudes of the incident signal and the reflected signal are measured. The detected incident signal is phase shifted by a first angle to yield a first incident signal and the detected reflected signal is phase shifted by the first angle to yield a first reflected signal. The detected incident signal and the first incident signal are mixed with the detected reflected signal and the first reflected signal. The angle of the reflection coefficient is determined based on the mixing and the magnitudes of the incident signal and the reflected signals.

Techniques are disclosed for systems and methods to provide remote sensing imagery for mobile structures. A remote sensing imagery system includes a radar assembly mounted to a mobile structure and a coupled logic device. The radar assembly includes an orientation and position sensor (OPS) coupled to or within the radar assembly and configured to provide orientation and position data associated with the radar assembly. The logic device is configured to receive radar returns corresponding to a detected target from the radar assembly and orientation and/or position data corresponding to the radar returns from the OPS, determine a target radial speed corresponding to the detected target, and then generate remote sensor image data based on the remote sensor returns and the target radial speed. Subsequent user input and/or the sensor data may be used to adjust a steering actuator, a propulsion system thrust, and/or other operational systems of the mobile structure.

A method (100; 200) for digital signal processing (S(t)) of a pulse and scanning radar during an observation of a coastal zone in land/sea detection mode, the signal being sampled according to a two-dimensional temporal map, a distance dimension (d) and a recurrence dimension (rec), comprising: selecting a digital terrain model file (MNT) of the observed coastal zone; transforming (110; 210) the temporal map and/or the digital terrain model file to obtain a transformed temporal map and/or a transformed digital terrain model file the data of which are expressed in a common reference frame; constructing (120) a mask (MT; MF) from the transformed digital terrain model file; and applying (130) the mask to the samples (E(d, rec); E(d, Δf)) of the map associated with the transformed temporal map, in such a way as to obtain filtered samples (Ef(d, rec); Ef(d, Δf)).

Disclosed is an optical unit wherein a rotating reflector rotates about a rotation axis in one direction, while reflecting light emitted from a light source. The rotating reflector is provided with a reflecting surface such that the light reflected by the rotating reflector, while rotating, forms a desired light distribution pattern, said light having been emitted from the light source. The light source is composed of light emitting elements. The rotation axis is provided within a plane that includes an optical axis and the light source. The rotating reflector is provided with, on the periphery of the rotation axis, a blade that functions as the reflecting surface.

A wide angle of a range of a field of view of a radar is handled with a wider reception interval. There is provided a radar system which converts a reception signal into digital data using a receiving array to perform sensing through arithmetic processing, the radar system including: the receiving array composed of three or more receiving systems; and at least two transmitting antennas having directional properties each of which is in horizontal symmetry and which are different in beam width, wherein the transmitting antennas different in directional property alternately perform transmissions, and a region of an arrival wave is determined based on a difference in measurement between reception levels corresponding to the individual transmissions. Defining a range in which a measurement of a propagation path length difference between adjacent receiving systems is less than a half-wavelength as a main region and outsides thereof as outside regions, in the case of the arrival wave from the outside regions, the arrival wave is determined to be from the outside region on a horizontally opposite side to a measured orientation to calculate an orientation in accordance with relation between an angle measurement value and an arrival angle in the outside region. Thereby, an angle range within which a sensing coinciding with the arrival angle is obtained is expandable from a conventional main region to a range within which the measurement of the propagation path length difference between the adjacent receiving systems is less than one wavelength.

A signal distribution system includes: a first signal divider arranged to generate a first output oscillating signal according to a first input oscillating signal; a second signal divider arranged to generate a second output oscillating signal according to the first input oscillating signal; a first transmitting channel coupled to the first signal divider and the second divider for transmitting the first input oscillating signal to the first signal divider and the second signal divider; and a second transmitting channel coupled to the first signal divider and the second divider for transmitting a second input oscillating signal to the first signal divider and the second signal divider; wherein the first input oscillating signal has a first frequency, the second input oscillating signal has a second frequency, and the second frequency is smaller than the first frequency.

The radiation-direction changing and maintaining portion includes: a linear-movement generator, which is provided on a surface of a wave energy radiating portion opposite to a surface of the wave energy radiating portion from which the wave energy is radiated, and is configured to generate power required to change the direction of radiation of the wave energy radiating portion linearly along the wave energy radiating portion; a direction changer, which is provided so as to face the linear-movement generator, and is configured to change a direction of the power generated by the linear-movement generator toward the wave energy radiating portion to turn the wave energy radiating portion; and a force applying member configured to apply a force to the wave energy radiating portion in a direction against the turning of the wave energy radiating portion, which is caused by the power.