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8184606 |
Apparatus and method for monitoring base station signal in communication system having multiple antennas
In a signal monitoring apparatus of a base station of a communication system having multiple antennas, a transmitting/receiving unit transmits a plurality of transmit signals by using the multiple...
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8184052 |
Digital beamforming scheme for phased-array antennas
A method for beamforming in a communication system includes receiving a plurality of signals via a plurality of antennas, where the plurality of signals corresponds to at least one known training...
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8179314 |
Enhanced calibration for multiple signal processing paths in a frequency division duplex system
Calibrating signal processing paths for a plurality of transmission devices by obtaining calibration data for at least one of the signal processing paths for each of the transmission devices and...
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8169356 |
Anti-mask motion sensor
A motion sensing method and apparatus includes a housing enclosing a microwave motion sensor including an antenna, and a security system. The antenna may be a patch antenna which includes microwave...
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8159394 |
Selectable beam antenna
A selectable beam antenna of generally linear, polygonal, planar or polyhedral form, able to operate at microwave and millimetre wave frequencies, and constructed from associated networks that...
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8154452 |
Method and apparatus for phased array antenna field recalibration
A system and method for calibrating a modular phased array antenna after replacement of a component of the modular phased array antenna including a plurality of sub-arrays, each sub-array including...
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8150469 |
Adaptive array base station device and adaptive array base station device control method
An array antenna forming unit (22) combines at least two transmission/reception devices (40) to thereby sequentially form one array antenna. Every time an array antenna is formed, an array antenna...
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8144051 |
Adaptive sidelobe blanking for motion compensation
A motion compensation method and system is included in a radar antenna system mounted on a moving platform which is subject to pitch, yaw and roll. The radar antenna system includes a main array...
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8138973 |
Phased array antenna
This invention relates to utilizing a larger number of lower power transmit/receive modules in a phased antenna array in order to utilize cheaper and simpler transmit/receive modules whilst...
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8123173 |
Attitude and antenna steering system and method for spacecraft
A method of providing attitude and antenna steering for a spacecraft having a number of reaction wheels and a number of antennas is disclosed. The method includes determining a beta angle, the beta...
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8106825 |
Distributed receiver
A distributed receiver in signal communication with an active antenna array is described. The distributed receiver may include an exciter, a plurality of transmit/receive (“T/R”) modules, and a fre...
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8094062 |
Fore/aft looking airborne radar
An antenna system for an airborne radar system with a dorsal unit having two opposing long sides extending in a height direction (Z) and a longitudinal direction (X), and two opposing short sides...
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8089404 |
Partitioned aperture array antenna
A partitioned aperture array antenna. The novel antenna includes a first subarray having a first number of antenna elements equipped with transmit functionality and a second subarray having a...
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8085189 |
Antenna calibration
The present invention relates to antenna calibration for active phased array antennas. Specifically, the present invention relates to a built-in apparatus for autonomous antenna calibration....
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8081110 |
Association in contention access period
Certain aspects of the present disclosure relate to a method for association in contention access periods and to a method for multi-cycle training in channel time allocation periods.
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8077087 |
Methods and apparatus for phased array
Methods and apparatus according to various aspects of the present invention operate in conjunction with a phased array system. The phased array system may include an array structural frame defining...
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8077083 |
Deployable antenna system
A rapidly deployable HF surface wave radar phased array antenna system is provided, including a plurality of separate antenna elements that are relatively movable to desired spaced apart positions,...
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8068874 |
System and method for correcting signal deviations in a radio over fiber network
In a wireless base station comprising a center unit, and a remote unit provided with an array antenna and connected to the center unit through an optical fiber, the center unit outputs to the...
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8068053 |
Low-profile lens method and apparatus for mechanical steering of aperture antennas
A low-profile lens element for steering a beam is provided. Specifically, the low-profile lens element is mechanically rotatable such that a beam can be steered in any direction within...
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8063822 |
Antenna system
A beamformer is arranged to receive an input from a first antenna element and from at least one other antenna element and to generate at least a first and second output beam. The first and second...
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8049667 |
GPS antenna array and system for adaptively suppressing multiple interfering signals in azimuth and elevation
An antenna system has N antenna units stacked on a mast. Each unit has elements for responding to, e.g., GPS signals, and a phasing network that produces mutually orthogonal primary and auxiliary...
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8044857 |
System and method for correcting global navigation satellite system pseudorange measurements in receivers having controlled reception pattern antennas
Global Navigation Satellite System (GNSS) pseudorange measurements are compensated for receiver hardware and directionally dependent antenna errors to obtain desired accuracies for high precision...
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8041306 |
Cross-core calibration in a multi-radio system
A Radio Frequency (RF) transceiver includes a first RF transceiver group, a second RF transceiver group, local oscillation circuitry, and calibration control circuitry. Each of the RF transceiver...
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8032183 |
Architecture to support network-wide multiple-in-multiple-out wireless communication
The present invention provides a method of coordinating transmission by and reception by a plurality of antennas associated with a plurality of radio heads. The method includes determining, at a...
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8022861 |
Dual-band antenna array and RF front-end for mm-wave imager and radar
The radar includes a PCB having a top surface and a bottom surface, and a processor mounted on the bottom surface of the PCB. The radar includes a second liquid crystal polymer layer formed on the...
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8022860 |
Enchanced interference cancellation and telemetry reception in multipath environments with a single paraboic dish antenna using a focal plane array
An Advanced Focal Plane Array (“AFPA”) for parabolic dish antennas that exploits spatial diversity to achieve better channel equalization performance in the presence of multipath (better than tem...
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8013784 |
Butler matrix for 3D integrated RF front-ends
A radar apparatus comprises a substrate having first and second sides, an antenna including radiative elements disposed on the first side of the substrate, a Butler matrix supported by the...
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8009095 |
Antenna array and a method for calibration thereof
An antenna array (10) for the transmission of signals (20) is disclosed. The antenna array (10) comprises: a plurality of transmission paths (30-1, 30-2, 30-K) for transmitting a plurality of...
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8009096 |
Method, system and apparatus for determining antenna weighting for transmit diversity
A method, system and apparatus for determining at least one relative characteristic of a transmit diversity transmitter based on at least one quality indicator based on signals received on the...
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8005060 |
Beamforming techniques to improve ranging signal detection
Ranging code detection techniques are provided. Energy is received at a plurality of antennas of a first wireless communication device and received signals are generated from the received energy....
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8000418 |
Method and system for improving robustness of interference nulling for antenna arrays
A method and system are provided for improving the robustness of interference nulling for antenna arrays in a wireless communication network. The method is comprised of generating a first...
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7982662 |
Scanning array for obstacle detection and collision avoidance
This scanning array scans an area around the array for nearby objects, collision obstructions, and terrain topography. The scanning array can scan for sounds emitted by objects in the vicinity of...
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7969358 |
Compensation of beamforming errors in a communications system having widely spaced antenna elements
Systems and methods for operating a communications system. The methods involve computing one or more complex weights to be applied to transmit signals and receive signals by beamformers. The...
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7949360 |
Method and apparatus for adaptively allocating transmission power for beam-forming combined with OSTBCs in a distributed wireless communication system
An apparatus that adaptively allocates transmission power for beam-forming combined with orthogonal space time block codes in a distributed wireless communication system, the apparatus including:...
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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...
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7936302 |
Unwrapping of phase values at array antenna elements
A method and apparatus are described for the unwrapping of a set of phase values observed for an incoming signal on a phased array antenna. The difference between values observed on adjacent...
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7929918 |
System and method for training the same type of directional antennas that adapts the training sequence length to the number of antennas
Systems and methods of training antennas for two devices equipped with phased array antennas in a wireless network are disclosed. In one embodiment, the methods include transmitting a plurality of...
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7928900 |
Resolution antenna array using metamaterials
An antenna array includes at least one transmit array comprising a plurality of metamaterial elements. The antenna array further includes at least one near-field stimulator for inputting...
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7925303 |
Complementary beamforming methods and apparatuses
Improved methods and apparatuses are provided to address a potential “hidden beam problem” in wireless communication systems employing smart antennas. The improved methods and apparatuses uti...
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7916082 |
Field compatible ESA calibration method
A method may include cycling a first beam steering control antenna element of an electronically scanned antenna (ESA) array through a first portion of beam steering control states for the first...
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7904106 |
Method and apparatus of adaptively allocating transmission power for beamforming combined with orthogonal space-time block codes based on symbol error rate in distributed wireless communication system
Disclosed is an apparatus and method for adaptively allocating transmission power for beamforming combined with orthogonal space-time block codes (OSTBC) in a distributed wireless communication...
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7898464 |
System and method for transmitting signals via photonic excitation of a transmitter array
A radio frequency (RF) phased array transmitter system comprises a phased array for generating an RF signal. The phased array comprises conductive patches formed in an array, separation gaps, and...
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7884757 |
Scanning ultra wideband impulse radar
In one embodiment, an ultra wide band (UWB) radar includes: a substrate; a plurality of antennas adjacent the substrate, the plurality of antennas being arranged into a plurality of sub-arrays; an...
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7873325 |
Cross-core calibration in a multi-radio system
A Radio Frequency (RF) transceiver includes a first RF transceiver group, a second RF transceiver group, local oscillation circuitry, and calibration control circuitry. Each of the RF transceiver...
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7869802 |
Uplink frequency multiplexing system
A satellite-borne transponder for two or more uplink service areas, includes uplink antennae, a low noise amplifier and a converter for each uplink antenna, input filters, amplification chains,...
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7868818 |
Multi-element antenna
An antenna is provided, in combination with an associated switch array, the antenna comprising a number of antenna elements mounted above a ground plane for providing coverage over a predetermined...
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7855681 |
Systems and methods for determining element phase center locations for an array of antenna elements
A method for operating a communications system is provided. The method includes receiving a plurality of signals at a plurality of antenna elements, the plurality of signals arriving at the array...
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7843383 |
Imaging through silhouetting
Improved microwave imaging using a reflector. By providing a reflective surface in the range of the imaging system, additional information is available for imaging objects. The relative surface...
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7830301 |
Dual-band antenna array and RF front-end for automotive radars
The automotive radar includes a printed circuit board having a top surface and a bottom surface, and a processor mounted on the bottom surface of the printed circuit board. The automotive radar...
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7817089 |
Beamformer using cascade multi-order factors, and a signal receiving system incorporating the same
A beamformer includes a number (T) of consecutive combining stages. A Tth combining stage includes a converging unit. Each of first to (T−1)th combining stages includes a plurality of converging u...
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