Abstract: A system and method for verifying ADS-B messages received at an aircraft from other aircraft within its ADS-B range. This disclosure enhances the current Automatic Dependent Surveillance-Broadcast (ADS-B) IN surveillance systems, and the disclosed system is an onboard system designed to enable ADS-B IN capable aircraft to verify the information received via ADS-B from the rest of the aircraft within its ADS-B range. The system's performance is based on the principles of multilateration (MLAT). The system performs MLAT calculations to determine whether the ADS-B messages received are truthful or not truthful. The disclosed system relies on a communication protocol based on a series of requests and responses to interchange the information needed by the aircraft involved in the process to carry out the MLAT calculations.

Abstract: In one embodiment, an apparatus includes a processor for processing a plurality of radio frequency chains at a wireless device in a block based modulation environment, recording subcarrier phases and differences between the subcarrier phases, and using the subcarrier phase differences to construct a feature vector for use in angle of arrival calculated positioning of a mobile device, and memory for storing the subcarrier phases and the feature vector.

Abstract: There is provided an information processing system including: a plurality of survey markers each including a GNSS reception unit that receives a signal from a GNSS satellite; a first position measurement unit that measures a ground position of at least one survey marker on the basis of the signals received by the plurality of survey markers; and a processing unit that detects the survey marker from a captured image captured by a UAV and including the survey marker, and associates a position of the detected survey marker in the captured image with the ground position.

Abstract: A directional receiver system may include a receiver, a plurality of receive antenna elements, and a circuit. The receiver may include an input port and an output. The plurality of receive antenna elements may be fixedly configured into a known geometric relationship to each other, and each of the receive antenna elements may be connected to the input port of the receiver. The circuit may be coupled to the output of the receiver, configured to determine time differences at which signals from a source are incident upon the antenna elements, and configured to determine an angular orientation of the source to the receive antenna elements based on the time differences.

Abstract: Systems, methods, and apparatus for an electromagnetic (EM) panel are disclosed. In one or more embodiments, a disclosed electromagnetic (EM) panel comprises an outer skin, an inner skin, a core disposed between the outer skin and the inner skin, and at least one receiver to receive at least one first signal. In at least one embodiment, at least one receiver is disposed within an opening on the outer skin of the EM panel. At least one receiver is an optical sensor(s) and/or a radio frequency (RF) antenna(s). In one or more embodiments, the EM panel further comprises at least one transmitter to transmit at least one second signal. In at least one embodiment, at least one transmitter is disposed within an opening on the outer skin of the EM panel. At least one transmitter is a laser(s) and/or a RF antenna(s).

Abstract: An information processing apparatus which is capable of identifying an exact distance to a transmitting apparatus. A received radio wave intensity is measured when a radio wave transmitted from a transmitting apparatus via a short-range wireless communication is received, and a distance to the transmitting apparatus is identified based on a distance management table in which the received radio wave intensity and a distance associated with the received radio wave intensity are managed. A received radio wave intensity at a reference position a predetermined distance away from the transmitting apparatus is measured. The distance management table is calibrated based on the measured received radio wave intensity at the reference position.

Abstract: A radar device includes a signal processing unit and a target information output unit. The target information output unit outputs only pair data having addition reliability equal to or larger than a threshold to the outside of the radar device as target information. The signal processing unit determines whether a first target and a second target belong to the same object. The first target is pair data derived later than the second target. If it is determined that the first target and the second target belong to the same object, the signal processing unit transfers reliability of the second target to the first target.

Abstract: An apparatus including an antenna and a processing device. The antenna includes a steerable array. The steerable array may transmit a signal at an angle of transmission toward a portion of an object. The steerable array may receive a reflection of the signal off of the portion of the object. The processing device may be coupled to the antenna. The processing device may determine a digital representation of the portion of the object in view of the reflection of the 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: A reflection microwave barrier for monitoring a limit level in at least one working area by outputting a switching signal. The reflection microwave barrier including a microwave transmitter for continuously emitting a time modulated microwave signal, a microwave receiver arranged on the same side of the at least one working area as the microwave transmitter to receive a reflection of the microwave signal, and a control circuitry communicating with the microwave receiver for a detection and monitoring of echo signals in the received reflection of the microwave signal. The control circuitry calculates the runtime of an echo signal), when the amplitude of the echo signal rises or increases. Furthermore, the control circuitry determines by the calculated runtime, whether an origin of the echo signal lies within the at least one working area, and only outputs the switching signal in this case.

Abstract: An in-flight entertainment (IFE) system for an aircraft includes a phased array antenna and control circuitry associated therewith to be carried by the aircraft and to generate dual antenna beams for television programming and Internet data from respective spaced apart satellites. A television programming distribution system is to be carried by the aircraft and coupled to the phased array antenna and control circuitry to provide television programming within the aircraft. At least one access point is to be carried by the aircraft and coupled to the phased array antenna and control circuitry to provide a wireless local area network (WLAN) within the aircraft for the Internet data.

Abstract: For the purpose of providing an electromagnetic wave absorber capable of holding excellent performance over a long period of time, the electromagnetic wave absorber includes: a dielectric layer B including a polymer film and having a first surface and a second surface; a resistive layer A formed on the first surface of the dielectric layer Band containing indium tin oxide as a main component; and an electrically conductive layer C formed on the second surface of the dielectric layer B and having a sheet resistance lower than that of the resistive layer A, wherein the indium tin oxide in the resistive layer A contains 20 to 40 wt. % of tin oxide based on the total weight of the indium tin oxide.

Abstract: A system and method to resolve angle of arrival (AOA) ambiguity in a radar system include receiving received reflections at a plurality of transceiver nodes. Each transceiver node among the plurality of transceiver nodes of the radar system receives one or more of the received reflections at respective one or more receive elements. The method includes determining candidate AOAs {circumflex over (?)}i based on phases differences in the received reflections at the plurality of transceiver nodes, and determining Doppler frequencies fdi based on the received reflections. An estimated AOA {circumflex over (?)} is selected from among the candidate AOAs {circumflex over (?)}i based on matching metrics ?i between the Doppler frequencies and the candidate AOAs {circumflex over (?)}i.

Abstract: The present application discloses embodiments that relate to an electromagnetic apparatus. In one aspect, the present apparatus includes a circuit board configured to propagate an electromagnetic signal. The apparatus also includes a waveguide configured to propagate an electromagnetic signal. The apparatus further includes a coupling port configured to couple a signal between the circuit board and the waveguide, where the coupling port has dimensions based on a desired impedance of the port.

Abstract: A system and method for forming synthetic aperture radar images. Radar return pulses are grouped into sub-dwells, and their frequency content is separated into frequency sub-bands. A coarse image is formed for each sub-band/sub-dwell combination. The coarse images are iteratively interpolated to higher resolution and combined, to form a single high-resolution synthetic aperture radar image.

Abstract: A water vapor observing system which is capable of observing water vapor regardless of a situation of an external system may be provided. The water vapor observing system may be configured to observe water vapor contained within atmospheric air, and include a transmission unit configured to transmit transmission waves, one of a reception unit configured to receive reflection waves caused by the transmission waves reflected on and returned from a stationary object as reception waves, and a reception unit disposed at a different position from the transmission unit and configured to receive the transmission waves as reception waves, and a relative water vapor amount calculating module configured to calculate a relative water vapor amount that is a relative value of water vapor with respect to a reference water vapor amount being a comparison target, based on the reception wave received by the one of the reception units.

Abstract: In an embodiment, an antenna subsystem includes a sparse receive antenna and an electronically steerable transmit antenna. The sparse receive antenna includes an array of receive elements each configured to receive a respective signal having a wavelength and each spaced apart from each adjacent one of the receive elements by a respective first distance that is more than one half of the wavelength. And the electronically steerable transmit antenna includes an array of transmit elements each configured to radiate a respective signal having the wavelength and each spaced apart from each adjacent one of the transmit elements by a respective second distance that is less than one half of the wavelength. To reduce aliasing, such an antenna subsystem can be operated to filter, spatially, a receive beam pattern generated by the receive antenna with a transmit beam pattern generated by the transmit antenna.

Abstract: 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.

Abstract: In some examples, a system includes a radar device configured to transmit first X-band radar signals in a weather mode and receive first return X-band radar signals in the weather mode. In some examples, the radar device is further configured to transmit second X-band radar signals in a landing mode and receive second return X-band radar signals in the landing mode. In some examples, the system also includes processing circuitry configured to detect, in the weather mode, weather formations based on the first return X-band radar signals. In some examples, the processing circuitry is further configured to determine, in the landing mode, a position of a transponder based on the second return X-band radar signals received by the radar device and determine a location of a runway based on the position of the transponder.

Abstract: A radar system and method of extending a parameter of a location of a target obtained by radar is disclosed. The system receives an echo signal that is a reflection of a radar source signal from the target. The echo signal is sampled and a peak for the echo signal is objected in frequency space. For a peak that is located at a frequency greater than a Nyquist frequency of the echo signal, the peak is moved to a negative domain of the frequency space and the location of the target is determined using the peak in the negative domain.