Abstract: A method of estimating the location of a signal source comprises, by a processing unit: determining ???m,n which represents a difference between accumulated phases of signals, Sm and Sn, received by at least one pair of the receivers, determining a first estimate of the location of said signal source based on position data and ???m,n of at least one pair of receivers, said first estimate being associated with an accuracy area, determining data representative of difference in times of arrival of modulation patterns of the signals Sm, Sn, wherein said data comprise an ambiguity, and for said at least one pair of receivers, using at least said data representative of difference in times of arrival of the modulation patterns of the signals, ???m,n, and said accuracy area, to obtain second estimates êSrck of the source location, at least some of them being located within the accuracy area.

Abstract: A cellular communication system comprising a population of cellular communication network nodes comprising a stationary core, a plurality of base stations, and at least one node having mobile station functionality; and a client tunneling functionality co-located with the node having mobile station functionality which is operative to use network topology information obtained via the mobile station functionality to initiate generation of a tunnel having a first end at the node and a second far end at the stationary core.

Abstract: A system operative to down a target drone having propellers deployed along a perimeter p, comprising a processor-controlled interceptor drone bearing a processor-controlled flexible elongate intercepting agent cannon and an onboard camera; and an onboard processor to receive sensed wind conditions and to a firing distance d, between interceptor and target drones, given a firing angle A, and wherein the processor is configured to track the target drone using imagery generated by the onboard camera including at least once, when said wind conditions exist, guiding the interceptor drone to a firing position whose distance from the target drone is d, and commanding the cannon to fire at firing angle A, once said firing position is achieved, thereby to use the flexible elongate intercepting agent to down target drones.

Abstract: A tracking system and method for constructing pictures of tracks of moving targets on a scene from electro-optical (EO) detections are described. The system includes EO sensors, and an EO tracker constructing pictures of the tracks of the targets. The EO tracker includes a pre-processing system for receiving EO detections of the targets and locating the targets on a world map, a candidate track selection system for finding candidate tracks, a track initializing module for receiving the EO detections and initializing a new track, an assigning system for assigning the EO detections to the candidate tracks, a data updating system for updating the candidate tracks after the assigning, and for generating an ambiguity set of tracks and an exclusion set of tracks, a picture providing system for receiving the ambiguity set and the exclusion set to generate a picture, and a tracker database for storing the updated tracks.

Abstract: A transponder system is presented, comprising first and second antenna arrays each comprising a plurality of antenna elements arranged in a predetermined geometry. The antenna elements of the first antenna array are respectively interconnected with corresponding antenna elements of the second antenna array by respective connection lines thereby forming plurality of receiving-transmitting pairs of antenna elements. A receiving-transmitting pair is configured to receive an input electro-magnetic signal by one antenna element thereof and transmit a corresponding output signal by the other antenna element, thereby enabling collective collection of a signal waveform and transmission of a corresponding output signal waveform. The first and second antenna arrays are rotatable with respect to one another about at least one predetermined rotation axis, thereby enabling variation of direction of propagation of the output signal waveform with respect to direction of propagation of the collected signal waveform.

Abstract: A fusion system and method for constructing tracks of a ground target from radar and optical detections are described. The system includes a radar channel and an optical channel. The radar channel includes a Ground Moving Target Indicator (GMTI) radars providing GMTI detections in the form of GMTI plots, a GMTI tracker configured for constructing GMTI tracks of the ground target from the GMTI plots, and a Smooth Radar Plots generator configured for sequentially in time producing smooth radar plots in the form of locations of ground target on the GMTI tracks and corresponding location errors. The optical channel includes electro optical (EO) sensors sequentially in time providing EO detections in the form of coordinates of the ground target, and a combiner tracker configured for combining data streams of the radar channel with data streams of the optical channel, and producing fused tracks of the ground target.

Abstract: A method of communicating information from a sensor concerning a received signal, comprising: responsive to receiving by at least one detecting sensor, during a defined time interval, data indicative of an entire data of a frequency band received by it during the defined time interval, comprising at least one signal emitted at least one emitter, and to detecting of the emitted signal by the at least one detecting sensor, sending from the sensor assistance information corresponding to the detected emitted signal during the defined time interval, to at least one non-detecting sensor. This information can be utilized by the non-detecting sensor to perform an action with respect to data indicative of an entire data of the frequency band received by the non-detecting sensor during a corresponding defined time interval, the action corresponding to at least one emitted signal received by the non-detecting sensor during the corresponding defined time interval.

Abstract: The present disclosure provides a computer implemented method of providing an indicator useful for piloting an aircraft. The aircraft comprises an antenna configured to communicate with a transceiver. The method comprises: obtaining an antenna envelope characterizing directions relative to the aircraft for which a directive gain of the antenna exceeds a predetermined threshold; determining a direction of the transceiver relative to the aircraft; calculating a maneuvering range of the aircraft by comparing the antenna envelope and the transceiver direction, wherein the maneuvering range is indicative of eligible orientations of the aircraft for maintaining the transceiver within the antenna envelope; and outputting data indicative of the maneuvering range.

Abstract: System for ex post facto upgrading of at least one Legacy personal communication device including a legacy modem and lacking at least one desired wireless communication feature, the system comprising an upgraded communication device including an auxiliary modem physically connected via an ex post facto physical connection to a Legacy personal communication device having at least one legacy wireless output channel which has been neutralized or disabled.

Abstract: A method for repetition of uplink transmissions comprises: a repeater apparatus, aka uplink repeater, has a controller, a downlink receiver and an uplink transmitter and receiver. Use the downlink receiver to receive a downlink signal from a base station whose cell the uplink repeater is serving. For downlink frame(s) thus received: the controller demodulates at least a portion of the downlink frame and extracts MAP_D data describing allocation of an uplink transmission in upcoming uplink frame(s) to be transmitted after the downlink frame; controller determines a subset of UL transmission allocations to be repeated, to define a subset of mobile stations in the cell, whose uplink transmissions are to be repeated; the uplink receiver receives the UL transmissions to be repeated from each mobile station, and repeats the UL transmissions to be repeated by commanding the UL transmitter to send the content.

Abstract: A direction-finding antenna system is described. The direction-finding antenna system comprises a plurality of tapered dipole antenna elements arranged in circular array around a central axis. Each tapered dipole antenna element comprises a pair of rectangular elongated antenna elements mounted radially from said central axis and configured to be curved such that a distance between said pair of rectangular elongated antenna elements is larger at periphery of the system with respect to center thereof.

Abstract: A reflective antenna comprising a flexible reflective sheet extending between a central hub and a perimeter edge, and a reflective sheet support mechanism comprising one or more spiral ribs articulated to the reflector sheet at least at several locations along the perimeter edge of the reflective sheet; wherein at a collapsed, stowed position of the reflective antenna the one or more spiral ribs are coiled about a common center and the reflective sheet is folded at a compact configuration, and at an expanded, deployed position the one or more spiral ribs are radially expanded and the reflective sheet is stretched over the expanded one or more spiral ribs, imparting the reflective sheet a parabolic shape.

Abstract: System for ex post facto upgrading of at least one Legacy personal communication device including a legacy modem and lacking at least one desired wireless communication feature, the system comprising an up-graded communication device including an auxiliary modem physically connected via an ex post facto physical connection to a Legacy personal communication device having at least one legacy wireless output channel which has been neutralized or disabled.

Abstract: A cellular communication system comprising a population of cellular communication network nodes comprising a stationary core, a plurality of base stations, and at least one node having mobile station functionality; and a client tunneling functionality co-located with the node having mobile station functionality which is operative to use network topology information obtained via the mobile station functionality to initiate generation of a tunnel having a first end at the node and a second far end at the stationary core.

Abstract: A heatsink assembly including a substrate having an active circuitry, at least one cavity located adjacent to at least one heat producing element of the active circuitry, at least one vessel sealably coupled to said substrate in fluid communication with the at least one cavity, and a phase change material (PCM) contained inside the vessel. The vessel and at least one cavity are configured to facilitate migration of the PCM from the vessel into the at least one cavity for absorbing heat produced by the at least one heat producing element of the active circuitry.

Abstract: A cellular system comprising at least one moving non-stationary base station for enabling cellular communication between at least two mobile stations in a geographic area that lacks adequate cellular coverage by at least one stationary base station.

Abstract: A method of communicating information from a sensor concerning a received signal, comprising: responsive to receiving by at least one detecting sensor, during a defined time interval data indicative of an entire data of a frequency band received by it during the defined time interval, comprising at least one signal emitted at least one emitter, and to detecting of the emitted signal by the at least one detecting sensor, sending from the sensor assistance information corresponding to the detected emitted signal during the defined time interval, to at least one non-detecting sensor. This information can be utilized by the non-detecting sensor to perform an action with respect to data indicative of an entire data of the frequency band received by the non-detecting sensor during a corresponding defined time interval, the action corresponding to at least one emitted signal received by the non-detecting sensor during the corresponding defined time interval.

Abstract: A floating structure is described. The floating structure includes a floating platform disposed at a water surface, a mooring system and a damping system. The mooring system is configured for mooring one side of the floating platform to a sea floor, thereby to permit rotation of the floating structure and to provide a desired orientation down-wind with respect to an anchor point. The damping system is arranged at one side of the floating platform and is configured for absorbing wave energy and stresses imparted by the motion of waves in order to stabilize a horizontal position of the floating structure down-wind during a storm against the waves.

Abstract: A semiconductor substrate structure and process for fabrication of the semiconductor substrate structure are described. The semiconductor substrate structure includes a silicon carbide (SiC) wafer substrate, an active gallium nitride (GaN) layer and a layer of microcrystalline diamond (MCD) layer disposed between the SiC wafer substrate and the GaN active layer. The MCD) layer is bonded to the SiC wafer substrate and to the GaN active layer.

Abstract: A method for converting a conventional cellular network e.g. having nodes equipped with conventional modems operating in accordance with a cellular communication protocol e.g. LTE and storing first orthogonal sequences, into a private cellular network, including coupling an (e.g. external) device to only nodes sought for the private cellular network, the device storing second orthogonal sequences not hard-coded in the modems, the device storing a one-to-one correspondence enabling translation of each second orthogonal sequence, to one of the first sequences. at least when in a private network supporting mode, a device associated with a transmitting node sought for the private network, uses a processor to determine which first orthogonal sequence is being used, translate that sequence using the one-to-one correspondence into a second orthogonal sequence, and use the translated sequence to transmit a synchronization signal.