Abstract:
The representative embodiments discussed in the present disclosure relate to techniques in which the transmission and reception of phase array antennas (69) may be measured to more accurately and more efficiently estimate incidence angles of the associated RF signals. More specifically, in some embodiments, RF signals may be transmitted and received by various subsets of antennas (69) in a pair of phased antenna arrays (67), and the resulting signals may adaptively filtered and fed back to perform iterations until incidence angles may be accurately determined.
Abstract:
The invention relates to a method, devices and systems, where a first radio connection is formed from a user device to a communication network,and information of a location of the user device is provided to a server system connected to the communication network over the first radio connection. Then, link setup information is formed at the server system and provided from said server system over the first radio connection. The link setup information comprises data for forming a second radio connection from the location of the first user device to a communication network using a beam forming antenna. Utilizing this link setup information, a second radio connection is formed from the first user device to a communication network, and a beam forming antenna operating in a beam forming mode is used in the forming of the radio connection. The second radio link may be a link between the user device mounted in a fixed location, e.g. a wall of a building and a network radio node. The user device may be e.g. a LTE-to-the-home(LTTH) router that provides internet connectivity locally.
Abstract:
Winkelauflösender FMCW-Radarsensor mit mehreren Antennenelementen, die in einer Richtung, in welcher der Radarsensor winkelauflösend ist, in verschiedenen Positionen angeordnet sind und mindestens drei Sendearrays sowie mindestens ein Empfangsarray bilden, und mit einer Steuer- und Auswerteeinrichtung, die für eine Betriebsweise ausgelegt ist, bei der die mindestens drei Sendearrays periodisch Signale senden, deren Frequenz gemäß einer Folge von Modulationsrampen moduliert ist und bei der Radarechos der gesendeten Signale jeweils von mehreren Antennenelementen des mindestens einen Empfangsarrays empfangen werden und der Winkel eines georteten Objekts anhand von Amplituden- und/oder Phasenbeziehungen zwischen Radarechos bestimmt wird, die unterschiedlichen Kombinationen von Sende- und Empfangsarrays entsprechen, wobei ein Messzyklus des Radarsensors mindestens zwei Perioden umfasst, in denen jeweils zwischen mindestens zwei Kombinationen von Sende- und Empfangsarrays gewechselt wird, und dass die beteiligten Kombinationen von Sende- und Empfangsarrays für die mindestens zwei Perioden voneinander verschieden sind.
Abstract:
The present invention relates to a polarimetric radar, consisting of a transmission assembly that emits circularly polarized waves by means of transmission antennas and a receiver assembly that receives the reflected circularly polarized wave components by means of an antenna assembly. A plurality of two-channel receivers are provided as the receiver assembly, which simultaneously receive clockwise-rotating and anti-clockwise-rotating circularly polarized signal components, which are provided for digital beam shaping downstream of the antenna assembly. The invention further relates to a method for object classification.
Abstract:
In one embodiment, an antenna system has a plurality of antenna paths and a calibration circuit. Each of the antenna paths has a transceiver and an antenna element. The calibration circuit has (i) a calibration transceiver and a different coupler coupled to each antenna path. The couplers are connected in series with one another and with the calibration transceiver. Connecting the couplers in series, rather than in parallel, reduces the amount of cabling needed and the need for a combiner/splitter or switch matrix between the couplers and the calibration transceiver, thereby reducing the cost, volume, and/or weight associated with the calibration circuit.
Abstract:
Method and system for provided a long range, high capacity ad-hoc mobile communication network where a narrow antenna beam formed by a plurality of antenna elements, radio transceivers and digital spatial signal processing is used to provide a high accuracy positioning system integrated into the communication system. The relative positions and directive orientation of all the units in the network is done by mutual exchange of positioning data as an element in the communication protocol in the network.
Abstract:
Method and system for provided a long range, high capacity ad-hoc mobile communication network where a narrow antenna beam formed by a plurality of antenna elements, radio transceivers and digital spatial signal processing is used to provide a high accuracy positioning system integrated into the communication system. The relative positions and directive orientation of all the units in the network is done by mutual exchange of positioning data as an element in the communication protocol in the network. The integrated communication and positioning system is used to optimize range and communicationquality, reduce interference in the network and comply with regulationsaccording to the geographical position and direction of transmission. The low latency, high accuracy distributed positioning system is in one embodiment an efficient real-time guidance system for moveable object such as un-manned aircrafts where the reference system on the ground can consist of one or more moving units.
Abstract:
Systems and methods for resource allocation for an uplink control channel for a user equipment UE (110) using multiple transmit antennas (124) in a wireless communication network (100) are disclosed. A plurality of orthogonal resources (108) for use by the UE (112) on the uplink control channel is selected. Control information is transmitted from the UE on the uplink control channel on the plurality of orthogonal resources with transmit diversity.
Abstract:
A system and method for media access control optimization for long distance wireless communication between an airborne platform and a surface base station is provided. The system includes receiving an incoming beamform signal. The incoming beamform signal includes a data portion and a token. It is possible, in some embodiments, that the data portion and the token are independently modulated. The token identifies a subsequent transmitter by including any of: an identification of which transmitter is to transmit next, length of time the next transmitter should transmit for, and transmit timing data. The system may then transmit an outgoing beamform signal including a data portion and a token. After which the system may wait for a return transmission, or a timeout. The system may also be enabled, in some embodiments, to maintain a list of active transmitters. This list of active transmitters may be updated periodically by adding and removing particular transmitters according to successful response transmissions.