Abstract:
Method for object detection in rain environment with W-band radar detection system. Radar data of region of interest is obtained, and range-velocity map generated. Initial threshold values are calculated in the range-velocity map. A rain condition is established in the region of interest based on amount of cells in the range velocity map exceeding initial threshold values. If rain condition is present, rain cells and object cells are designated in the range-velocity map, the designated rain cells forming a rain cell pattern. Rain cell threshold values are calculated in rain cell pattern. A first object cluster is detected within the rain cell cluster, a second object cluster is detected outside the rain cell pattern in the vicinity of the first object cluster, and the first object cluster is merged with the second objet cluster to form a unified object pattern. Required information associated with the object of interest is obtained.
Abstract:
A radar imaging system comprises a radar transmitter (103) configured to transmit radar at a target (105); an aperture (115) comprising an array of physically independent airborne carriers (101), each of the carriers (101) configured to receive radar echoes from the target (105); and a base station (107), which may be located at ground level, in communication with each of the airborne carriers (101) to receive the radar echoes and determine an image of the target (105) from the received radar echoes.
Abstract:
Technologies are described effective to implement an atmospheric radar system. An antenna array transmits a wave toward an atmospheric target and receives a reflected wave that includes voltages corresponding to backscattered radar signal measurements. A processor includes a coherency matrix generator module effective to receive the voltages and generate a coherency matrix. The processor further includes an eigenvalue calculator module effective to receive the coherency matrix and calculate eigenvalues of the coherency matrix The processor includes an eigenvalue variable calculator module effective to receive the eigenvalues and calculate eigenvalue meteorological variables from the eigenvalues. The processor further includes an atmosphere display module effective to receive the eigenvalue meteorological variables and generate an output signal that corresponds to the meteorological property of the atmospheric target in response.
Abstract:
Die Erfindung betrifft ein Verfahren zur kommunikationssignalbasierten Positionsermittlung von Objekten im Straßenverkehr, bei welchem mindestens ein Daten transportierendes Kommunikationssignal von mindestens einem Absender (217, 218, 219, 220, 221, 34) kabellos gesendet und an mindestens einem Objekt (211, 212, 213, 214, 215, 216, 35) zumindest anteilig als Reflektionssignal reflektiert wird, wobei von einem Empfänger (222, 33) das mindestens eine Kommunikationssignal und das Reflektionssignal empfangen werden und wobei der Empfänger (222, 33) seine Eigenposition und einen Standort des mindestens einen Absenders (217, 218, 219, 220, 221, 34) kennt. Das Verfahren zeichnet sich dadurch aus, dass vom Empfänger (222, 33) eine Laufzeitdifferenz des Kommunikationssignals und des Reflektionssignals bestimmt wird. Die Erfindung betrifft weiterhin eine entsprechende Vorrichtung (100) sowie deren Verwendung.
Abstract:
An imaging apparatus may include an interrogating apparatus, such as a scanner, configured to transmit toward and receive from a test subject in a target position, electromagnetic radiation in a frequency range of about 100 MHz to about 2 THz. The interrogating apparatus or scanner may produce an image signal representative of the received radiation. A controller may store in memory reference- image data for at least one reference subject. The controller may produce test- image data from the image signal and may compare at least a portion of the test- image data with at least a portion of the reference-image data for the at least one reference subject.
Abstract:
The present invention relates to a motion detector device (1) comprising a receiver (2) arranged for reception of at least one electromagnetic signal (3b, 4b, 5b) constituted by a corresponding transmitted electromagnetic signal (3a, 4a, 5a) being transmitted by a corresponding source (6, 7, 8) and influenced by a corresponding channel (9; 9a, 9b, 9c). The motion detector device (1) comprises predetermined information regarding each transmitted electromagnetic signal (3a, 4a, 5a). The motion detector device (1) further comprises analyzing means (10) arranged to analyze all components of the received signal to determine how certain parameters of each transmitted electromagnetic signal (3a, 4a, 5b) are influenced by each corresponding channel (9; 9a, 9b, 9c) by means of the predetermined information. The analyzing means (10) is also arranged to analyze the temporal variation of said certain parameters during a certain time. It is determined if said temporal variation exceeds a predetermined threshold. The present invention also relates to a corresponding method.
Abstract:
A system for identification and location of a minefield in a geographical region of interest (ROI), said system comprising: c. a sensing unit for receiving the electromagnetic radiation of said ROI and generating at least one image of said electromagnetic radiation of said ROI, said ROI being characterized by a specific geographical location; and, d. an analyzing unit adapted to classify the probability of said at least one image to be a minefield by using one or more spectral parameters associated with at least one exposed chemical of said ROI; wherein said spectral parameters are selected from the group consisting of: SR, NDVI, PVI, SAVI, NLI, RDVI, MSR, WDVI, MNLI, NDVI*SR, SAVI*SR, TSAVI, green-ratio, Red-NIR parameters, NIR-SWIR1 slope, SAM algorithm in SWIR2, PPI, Nitrogen spectral index, and any combination thereof
Abstract:
In one aspect, a method to detect an object in an area includes forming a wireless network among a plurality of nodes, each of the nodes being configured to generate an electromagnetic field (EMF) in the area and determining changes in the EMF between two nodes based on: a first difference in received signal strength values between a previously determined received signal strength value and a currently determined received signal strength value, a second difference in received signal strength values between the currently determined received signal strength value and an average received signal strength value and a third difference in link quality values between a previously determined link quality value and a currently determined link quality value. The method further comprises detecting the object based on the changes in the EMF.
Abstract:
An apparatus, imager elements, and a method for detecting a radio frequency image using phased array techniques. An example apparatus includes an array of radio frequency antennas fabricated on one or more packaged integrated circuits. The apparatus also includes a controller configured to selectively phase shift radio frequency signals from the antennas such that the at least a portion of the radio frequency image is focused.
Abstract:
A method and system are provided in which a device having one or more illumination sources and may receive information for a target location through a network connection. The information may be based on video captured by a surveillance camera. The device may adjust a projection position of one of the illumination sources based on the target location information and may project a light beam generated by the illumination source onto the target location when the projection position is adjusted. The light beam may project a pattern onto the target location, which may comprise an image, a letter, a word, a symbol, or a combination thereof. The device may receive an indication of a type of situation taking place at the target location and may utilize the indication to select an illumination source and/or a type of pattern to project onto the target location.