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Match Document Document Title
8907846 Single-antenna direction finding system for multi-rotor platforms  
The single-antenna radio frequency (RF), direction finding (DF) system includes a single-element directional antenna, which is mounted on a multi-rotor UAV (Unmanned Aerial Vehicle) and integrates...
8811974 Coordinated multipoint wireless communication  
Multipoint wireless communications are coordinated in cells with radiation that is emanated from antennas in an inward direction. In an example embodiment, an apparatus includes a first antenna, a...
8624780 Method and system for using a wireless local area network (WLAN) phase shifter for smart antenna beam steering  
Phase shift values between signals received at a plurality of receiving antennas are determined to orient one or more receiving antennas of the plurality of receiving antennas during signal...
8599071 Adaptive antenna radio communication device  
A device for estimating a direction-of-arrival of a radio wave, the device comprising an array antenna including a plurality of antenna elements for receiving a high frequency signal, a...
8570150 Sensing system and method with integral sensor locating capability  
A sensing system includes integrated sensor locating capability. Sensors can transmit spread spectrum encoded data pulses which are received at mobile nodes. Based on time of arrival information...
8565208 Apparatus and method for transmitting coexistence beacon protocol in a cognitive radio system  
An apparatus and method for transmitting Coexistence Beacon Protocol (CBP) in a cognitive radio system are provided. The apparatus includes a detector, a controller, and a transmitter. The...
8542785 Communication apparatus and communication system  
A communication apparatus that can suppress an increase in circuit size and reduce influence of interference, includes reception array antenna elements, a reception digital beam forming (DBF)...
8450997 Electromagnetic position and orientation sensing system  
Magnetic tracking systems and methods for determining the position and orientation of a remote object. A magnetic tracking system includes a stationary transmitter for establishing a reference...
8451173 Maximum likelihood angle estimation of wideband signals using phased array antennas  
A method for estimating a target direction of a wideband signal received on an electronically steered array includes: applying convolutional or stretch processing to spatial frequency data of the...
8264406 Manifold calibration for a communication system  
A method and apparatus for determining stream weights is provided herein. During operation, an uplink direction of arrival (DOA) and a downlink direction of departure (DOD) calibration procedure...
8144057 Methods and apparatus for adaptively determining angles of arrival of signals  
A technique for determining the angles of arrival of signals incident on an antenna array from directions within an angular region of interest involves supplying outputs of antenna elements of the...
7940215 Adaptive antenna radio communication device  
An adaptive antenna radio communication device comprises a divided band direction estimating unit for estimating the direction by calculating the cross correlations between a pilot signal and...
7808421 Methods and apparatus for creating a scan strategy  
Some embodiments of the invention are directed to generating a scan strategy based on parameters input from a user, without requiring that the user be aware of information such as the specifics of...
7800541 Methods and systems for determining the location of an electronic device  
Embodiments of the present invention include a method of determining a location of a mobile device. The method comprises transmitting a signal between a plurality of known locations and receiving...
7720511 Self-optimizing adaptive antenna  
The present invention determines optimal positions of a variable antenna using an artificial intelligence-based genetic algorithm (GA). The GA acquires a fitness value for an individual of a...
7564407 Directivity control apparatus of array antenna and directivity controlling method  
An array antenna directivity control apparatus for use in tracking a target updates a weighting coefficient based on an error between antenna signals of multiple antennas and a known reference...
7482975 Multi-beam transmitting/receiving apparatus and transmitting/receiving method  
A multibeam transmitting/receiving apparatus is provided that is capable of increasing the accuracy of a direction in which a transmission beam is to be transmitted, with a simple arrangement....
7333056 Adaptive antenna radio communication device  
An adaptive antenna radio communication device comprises a divided band direction estimating unit (4) for estimating the direction by calculating the cross correlations between a pilot signal and...
7212120 Work site tracking system and method  
A system for tracking entities at a work site includes an antenna having a scanned boresight. A controller may be configured to determine a relative angle between a reference associated with the...
7110719 Indoor mobile communication device  
It is an object of the present invention to provide an indoor mobile communication device having a simple structure, providing a sufficient communication range, and also providing for stable...
6999796 Base station, base station module and method for estimating parameters of uplink signals  
The invention relates to a base station for a radio communications network. In order to enable a simple enhancement of the estimation of parameters of uplink signals, it is proposed that the base...
6859172 System and method for locating a mobile phone  
A system includes antenna control stations and a system interface. Each antenna control stations directs an orientation of an associated antenna to search for an identification signal associated...
6853916 Method and apparatus for forming a pseudo-range model  
A method and apparatus for locating mobile device over a broad coverage area using a wireless communications link that may have large and unknown latency. The apparatus comprises at least one...
6832155 Methods and apparatus for determining phase ambiguities in ranging and navigation systems  
An improved technique for determining the integer value of phase ambiguities (integer ambiguities) of pseudorange measurements based on the carrier phase of received navigation signals provides...
6704557 System and method for protecting a receiver from jamming interference  
An interference protection system includes a receiving section for receiving an electromagnetic signal, a detector for detecting a jamming signal, and a control system for orienting a changeable...
6697012 Altitude estimation system and method  
A system and method for detecting and tracking a target object, including the calculation of the target object's altitude, is disclosed. During the processing of signals received by a receiver,...
6677884 Satellite configuration for interferometric and/or tomographic remote sensing by means of synthetic aperture radar (SAR)  
For interferometric and/or tomographic remote sensing by means of synthetic aperture radar (SAR) one to N receiver satellites and/or transmitter satellites and/or transceiver satellites with a...
6552684 Direction of arrival estimation method and radio reception apparatus  
Spatial profile creation section 102 creates an intensity distribution, that is, a spatial profile or spatial information of reception signals with respect to the directions of arrival of signals...
6437740 Single receiver wireless tracking system  
A wireless tracking system consists of a wireless target including a wireless communication system for transmitting a data packet over a communication path, and a locating station for determining...
6417781 Short range wireless communication using on-board apparatus  
A fixed station and an on-board apparatus are constructed to carry out a short range communication. The on-board apparatus specifies an application from a command included in reception data...
6311129 Positioning process and system thereof  
A positioning method and a system are disclosed for measuring a position of a vehicle on land, air, and space, using measurements from a global positioning system receiver and an inertial...
6281839 Method and system for communicating electromagnetic signals  
A method for two way communication between a first station and a second station each said station comprising receiving means and transmitting means for receiving and transmitting electromagnetic...
6246365 Radar apparatus  
A radar apparatus comprising: a receiving antenna having an array antenna in which a plurality of antenna elements are arrayed in a horizontal direction; and a signal processing section for...
6208296 Method and apparatus for training a receiver on a source  
A method and apparatus for training a receiver on a source are provided. The receiver is an antenna and the source is a broadcast satellite. A first signal sensor receives at least one signal from...
6198436 Integrated interferometer and instantaneous frequency measurement device and method  
An integrated receiver includes an Instantaneous Frequency Measurement (IFM) device, an interferometer and switches. The IFM receives signals from a target and determines the frequency of the...
6184830 Compensation of direction finding estimates for polarimetric errors  
An algorithmic technique which allows antenna arrays that are used for interferometric direction finding to have elements with arbitrary orientation. This technique allows the phase errors...
5710566 Method for implementing a wireless data exchange between a fixed station and moving objects particularly vehicles  
A method for implementing a wireless data exchange between a fixed station and sending/receiving devices on board objects moving relative to the fixed station, preferably in lanes, and...
5572217 Compass  
A compass comprising a signal receiver having an antenna unit that can be fixedly mounted on an object on which the compass is to be used, the antenna unit permitting information relating to the...
5166693 Mobile antenna system  
In mobile communications, it is required that the beam direction is maintained to track the desired direction as the mobile is moving. For such a purpose, the mobile includes an angular rate...
5065162 Communication system for helicopter  
The present invention pertains to a radiowave relay station in which image information or the like is transmitted by a helicopter from a first station to a second station. A direction finding...
4970520 Process for resighting telecommunication antennas and apparatus for carrying it out  
A process for realigning telecommunication antennas with satellites wherein the radio-electric axis of reception of the antenna which receives a signal from the satellite is periodically modulated...
4823134 Shipboard antenna pointing and alignment system  
A mechanism for correcting for time-varying errors that affect the pointing accuracy of a shipboard mounted antenna employs a Kalman filter for realizing an optimal correction estimator through...
4737794 Method and apparatus for determining remote object orientation and position  
A method and apparatus is provided for determining remote object orientation and position with an electromagnetic coupling. A plurality of radiating antennas are provided for radiating...
4663631 Apparatus for maintaining the orientation of an antenna system with respect to a beacon  
In an apparatus for maintaining the orientation of an antenna system with respect to a beacon, radio signals are received in four quadrants and converted into sum and difference signals, which are...
4590476 Tracking servo compensator with rate aiding  
A tracking servo compensator is disclosed for radar systems which steer their antenna beams using a servomechanism that physically moves the antenna. The disclosed tracking servo compensator...
4334226 Antenna system for satellite communication  
In an antenna support device including a horizontal stabilized platform supported by two orthogonal corrective shafts and provided with a flywheel driven by a motor whose spin vector is directed...
4156241 Satellite tracking antenna apparatus  
Satellite tracking apparatus for use on board ship as part of a maritime communications satellite terminal is disclosed. A directional antenna which is adapted to be trained in the direction of...
4118705 Adaptive interface for rotational positioning device utilizing linear actuators  
An adaptive interface circuit for use in coupling movement commands to a device utilizing linear actuators to control the rotational position of a rotatable member. Since the rotational position...
4103304 Direction locating system  
An instantaneous, omnidirectional direction finding system for locating an incoming wave over a complete 360° arc in space employing a circular antenna array and a fixed phase shifting network for...
4092645 Radar jammer homing circuit  
1. In a fire control radar system of the character which produces radar signals having a predetermined repetition period and which includes coupled in cascade; an intermediate frequency amplifier,...

Matches 1 - 50 out of 149 1 2 3 >