There are provided methods and systems for producing a wave-beam having substantially constant lateral extent over a desired range of distances, and interrogation and response system and methods utilizing the same. The method for producing a wave-beam having substantially constant lateral extent includes generating a plurality of at least partially incoherent constituent wave-beams having different divergences and directing the plurality constituent wave-beams to propagate along substantially parallel propagation axes such that the constituent wave-beams at least partially overlap and superpose to form a combined wave-beam. The divergences and intensities of the constituent wave-beams are selected such that the combined wave-beam has a desired substantially constant extent over a desired range of distances along said propagation axes.

The radar includes an antenna having a radiation pattern forming a sum channel, SUM, a radiation pattern forming a difference channel, DIFF, and a pattern forming a control channel, CONT, a first transmission and reception chain being associated with the SUM channel and a second transmission and reception chain being associated with the CONT channel, a reception channel being associated with the DIFF channel. Each of the transmission and reception chains is able to transmit and to receive simultaneously, the transmission chain comprising a filtering operation that filters signals transmitted at 1090 MHz and the reception chain comprising a filtering operation that filter signals transmitted at 1030 MHz, in such a way that the chains operate independently of one another.

Embodiments for providing side lobe modulation in a radio frequency (RF) transmitting are generally described herein. In some embodiments, an antenna side lobe is modulated to add data to the side lobe for communication with an intended recipient.

An operation method of an electronic device for transmitting and receiving data through an ultra wideband (UWB) in a wireless communication system includes: transmitting, to another electronic device, a first ranging control message; transmitting, to the other electronic device, a ranging start message based on the first ranging control message; and receiving, from the other electronic device, a ranging response message based on the first ranging control message.

A vehicle control system includes at least one control inceptor to provide pilot control of an associated vehicle and a communications interface to process external entity SA data associated with an external entity that is received at a communications system associated with the associated vehicle. An SA video screen displays video data to a pilot of the associated vehicle. The video data includes pilot-perspective visual data corresponding to a real-time dynamic virtual representation of surroundings of the associated vehicle that simulates a real-world visual perspective of the pilot to the surroundings of the associated vehicle and is responsive to the pilot control. A visual indicator of the external entity is superimposed onto the pilot-perspective visual data at an approximate location corresponding to an actual location of the external entity relative to the associated vehicle and beyond a visual range of the pilot based on the external entity SA data.

Embodiments of the present invention disclose systems and methods for providing an ATC Overlay data link. Through embodiments of the present invention, existing ATC (or other) modulated signals using existing standard frequencies may be utilized to transmit (e.g., from an aircraft transponder) additional information in a manner that does not render the transmitted signal unrecognizable by legacy ATC equipment. Legacy equipment will be able to demodulate and decode information that was encoded in the transmitted signal in accordance with preexisting standard modulation formats, and updated equipment can also extract the additional information that was overlaid on transmitted signals.

A method for identifying ghost aircraft and a system for displaying information in an aircraft including a flight display onboard the aircraft and configured to display a visual expression of at least some air traffic information and an interrogation module configured to determine information about an other aircraft based on the identification address to define interrogated data, determine real-time information about the other aircraft, compare the real-time information and the interrogated data and update the flight display based on the comparison.

A radar is equipped with a main antenna having three radiation patterns, sum, difference and control, corresponding to the antenna, the radar comprises an auxiliary antennal device, composed of an antenna and of a rear radiating element which is situated at the rear of the antenna, fixed above the antenna and coupling means, the auxiliary antennal device: having three radiation patterns, sum, difference and control, the control pattern ensured for the direction opposite to the antenna by the rear radiating element; the antenna inclined to guarantee a maximum gain of its sum pattern in the elevational domain (60°-90°).

A method, a device, and a system for measuring physiological state information based on channel state information are provided. The method includes: respectively transmitting, by at least two transmitting antennas of a transmitter, a measurement signal. Respectively receiving, by at least two receiving antennas of a receiver, a reflected signal reflected the measurement signal through a target object. Obtaining, by the receiver, channel state information (CSI) between the transmitting antennas and the receiving antennas according to the reflected signals. Receiving, by a computing device, the CSI transmitted by the receiver and obtaining physiological state information of the target object according to the CSI.

The secondary radar includes an antenna having a radiation pattern forming a sum channel, designated SUM, a radiation pattern forming a difference channel, designated DIFF, and a pattern forming a control channel, designated CONT, the targets are located by implementing the following steps: detecting ADS-B squitters received via the CONT channel, via the SUM channel and via the DIFF channel; measuring at least the power of the squitters and their azimuth with respect to the radar; the location of a target transmitting ADS-B squitters being computed by exploiting at least the detection of one ADS-B squitter, in light of the latitudinal and longitudinal position of the radar and of the azimuthal measurement with respect to the radar, the position cell, designated the CPR cell, coded in the squitter being selected via the azimuthal measurement.