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7592955 |
Airborne turbulence location system and methods
A system and methods for calculating a range to a turbulent air region from an antenna platform is disclosed. The methods determine a correlation lag value corresponding to a time shift in...
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7570211 |
Digital beamforming method and apparatus for pointing and null steering without calibration or calculation of covariance matrix
The method and system provides an improvement in signal to noise plus interference without utilizing a calculated covariance matrix or calibrated antenna array, and does not require knowledge of...
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7541976 |
System and/or method for estimating speed of a transmitting object
The subject matter disclosed herein relates to techniques for estimating a speed of an object that transmits a signal at a carrier frequency. An apparatus and method disclosed herein includes...
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7539273 |
Method for separating interfering signals and computing arrival angles
A method is disclosed for processing all types of received, interfering radio frequency signals corrupted by noise to extract the individual signals without having any a priori knowledge about...
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7529392 |
Image processing system and medical examination apparatus for correlating features in medical images
An image processing system, for correlating shapes in multi-dimensional images including image data processor for estimating a similarity measure including estimating two image signals representing...
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7496129 |
Method and apparatus for space division multiple access receiver
Methods and systems consistent with this invention receive a plurality of transmitted signals in a receiver having a plurality of receive elements, wherein each transmitted signal has a different...
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7492810 |
Method and apparatus for segmented code correlation
A method and an apparatus is disclosed for efficient cross correlation of a plurality of signal vectors. Incoming data is partitioned into several segments and processed according to an algorithm...
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7477921 |
Cancellation system for frequency reuse in microwave communications
Substantial improvements in frequency reuse in microwave communications systems is achieved by canceling co-channel interference and transmitter leakage. Interferometric beam-narrowing reduces...
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7474905 |
Weight determining apparatus, a weight determination method, a radiation power measuring apparatus, and a radiation power measuring method
A weight determining apparatus is disclosed. The weight determining apparatus includes two or more antenna elements that receive a test wave transmitted by one or more test wave sources prepared...
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7453399 |
Antenna processing method for potentially non-centered cyclostationary signals
An antenna processing method for centered or potentially non-centered cyclostationary signals, comprises at least one step in which one or more nth order estimators are obtained from r-order...
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7453394 |
Method of position determination
A device includes an antenna for receiving an incoming signal. A multiplier multiplies the incoming signal with an output from a carrier generator in order to mix down signal the incoming signal....
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7450067 |
Incoming wave number estimation method, incoming wave number estimation device, and radio device
An incoming wave number estimation device for receiving incoming radio waves by an array antenna in which a plurality (=M) of antenna elements are linearly arrayed with a same element spacing, and...
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7430241 |
Method for early decoding of control channel information
A system and method for transmitting and receiving control information over a control channel of a wireless communication system where the conveyed information is coded and then transformed by a...
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7423961 |
Radio apparatus and adaptive array processing method
A correlator detects arriving timings of a desired wave and an interfering wave from a signal transmitted by the OFDM scheme. A reception response vector estimator estimates a first response vector...
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7423587 |
Method for frequency-driven generation of a multiresolution decomposition of the input to wave-based sensing arrays
A method for generating a multiresolution decomposition of an array signal by a bank of spatial bandpass filters is disclosed. The signal processing operation is implemented through the use of the...
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7414579 |
Blind signal separation using correlated antenna elements
A communications device for separating source signals provided by M signal sources includes an antenna array comprising N correlated antenna elements for receiving at least N different summations...
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7414578 |
Method for efficiently computing the beamforming weights for a large antenna array
A method of determining the size of a sub-array for an antenna array is described. The method includes choosing a number of elements of a sub-array of antenna elements. Further, the method includes...
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7411551 |
System and method for asynchronous wireless positioning by ordered transmission
Disclosed is a wireless positioning system and method that can perform a high-precision position tracking. The wireless positioning system includes a target device that is an object of wireless...
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7408508 |
Signal separation based on linear independent signal summation sets and an antenna array
A method for operating a communications device for separating an independent source signal from a mixture of source signals provided by M signal sources includes receiving at an antenna array at...
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7406337 |
Wireless communication system and method using multiple antennas
A wireless communication system, and method using multiple antennas, includes a base station that applies predetermined weight vectors to multi-user signals and transmits the multi-user signals...
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7397426 |
Signal separation for a CDMA communications device and associated methods
A method for operating a CDMA communications device includes receiving at an antenna array M different summations from a mixture of source signals provided by M signal sources, and providing the M...
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7369599 |
Method and apparatus for reducing code phase search space
A GPS communication system including a server and a client, each including a GPS receiver, for reducing the code phase search space of the GPS receiver of the client. The communication system...
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7369487 |
Clustered OFDM with channel estimation
An improved OFDM receiver is realized by employing a simplified delay function for the transmissions channel. The simplified delay function yields a simplified frequency-domain correlation that is...
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7365679 |
Positioning apparatus, control method of positioning apparatus, control program for positioning apparatus, and computer-readable recording medium having control program for positioning apparatus recorded therein
A positioning apparatus that measures a current position by using measurement basis codes carried on satellite waves from a plurality of positioning satellites includes: a first phase error...
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7362269 |
Undulating transmit patterns to support signal separation at a receiver
A communications system includes a fixed transmitter and a mobile wireless communications device. The fixed transmitter transmits a source signal defined by a character set made up of symbols. At...
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7362268 |
Method for detecting navigation beacon signals using two antennas or equivalent thereof
A method for detecting a plurality of navigation beacon signals by using either two antennas or a synthetic aperture antenna for receiving a plurality of distinct measurements, and combining the...
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7348923 |
Signal separation based on a hybrid separation matrix and antenna arrays
A method for operating a communications device for separating M source signals provided by M signal sources includes receiving at K antenna arrays M different summations of the M source signals,...
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7336220 |
Method and apparatus for equalizing broadband chirped signal
In order to generate a signal for canceling a chirped signal, a transmitter generates a cancellation signal along with the transmitted signal, using a single term variable complex gain multiplier...
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7324582 |
System and method for the directional reception and despreading of direct-sequence spread-spectrum signals
A system ( 100 ) and method for the reception and despreading of a code-division multiple access (CDMA) global positioning system (GPS) signal ( 200 ), or other direct-sequence spread-spectrum...
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7295624 |
Wireless system with hybrid automatic retransmission request in interference-limited communications
A wireless receiver for receiving signals from an interference-limited transmitter in an interference-limited system comprising at least one transmit antenna, wherein the signals comprise a...
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7286800 |
Multi-beam antenna reception device and multi-beam reception method
To provide a multibeam antenna reception device capable of improving the reception quality while suppressing an increase in the amount of computation. The multibeam antenna reception device...
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7265715 |
Communications device with adaptive decoding and associated methods
In a communications device operating with a blind signal separation (BSS) processor, an initial mixing matrix is formed based upon the different summations of the source signals received by the...
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7265714 |
Pattern diversity to support a MIMO communications system and associated methods
A MIMO communications system includes a transmitter, and a receiver synchronized with the transmitter. The transmitter changes the power levels for each layered space data stream on a time slotted...
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7260516 |
Optimization of a design
An apparatus, system, and method for optimization. The apparatus, system, and method include a mechanism for ending an optimization when all models within one design tolerance of an optimum model...
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7260153 |
Multi input multi output wireless communication method and apparatus providing extended range and extended rate across imperfectly estimated channels
A Multi Input Multi Output (MIMO) Wireless Communication System method and apparatus are proposed whereby in a 2-way wireless communication system with scattering, random and imperfectly estimated...
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7257167 |
System and method for multi-access MIMO channels with feedback capacity constraint
Systems and methods of MIMO wireless communication system with partial feedback are disclosed. In one embodiment, a base station estimates the channel matrices of the K mobile units and transmits...
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7253769 |
Method for the elimination in a receiver of incident beams resulting from multipaths, and device for implementation
Method for the elimination in a receiver of an incident signal resulting from multipaths, characterized in that an array of 2n auxiliary sensors ( 2, 3 , Ca to Cf), with n≧3, is constructed...
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7190746 |
Multiple lobe dot product detector for M-code GPS receivers
A positioning system receiver is disclosed. The positioning system receiver includes an antenna for receiving radio frequency (RF) signals. The positioning system receiver also includes a radio...
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7190308 |
Blind signal separation using signal path selection
A communications device for separating source signals provided by M signal sources includes an antenna array comprising N elements for forming at least N antenna beams for receiving at least N...
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7161534 |
Hybrid beamforming apparatus and method for the same
A hybrid beamforming apparatus and method are proposed for a communication system. The hybrid beamforming apparatus includes a plurality of antennas, a plurality of FFT, a plurality of hybrid...
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7132980 |
Multi-function device with positioning system and shared processor
A multi-function device with a positioning function and a real time positioning engine is disclosed. The device contains also a shared processor used by the positioning function and other functions...
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7129888 |
High speed weighting signal generator for sidelobe canceller
A sidelobe canceller for a transducer arrangement such as an antenna or sonar transducer uses a main transducer and one or more auxiliary transducers. The auxiliary received signals are weighted by...
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7123191 |
Blind signal separation using I and Q components
A communications device for separating source signals provided by M signal sources includes an antenna array comprising N antenna elements for receiving at least N different summations of the M...
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7117018 |
Array beamforming with wide nulls
A method and implementation of wireless communication are disclosed in which wireless signals are exchanged between at least one remote client and a directional antenna array associated with a...
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7116271 |
Blind signal separation using spreading codes
A communications device for separating source signals provided by M signal sources includes an antenna array comprising N antenna elements for receiving at least N different summations of the M...
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7113129 |
Blind signal separation using a combination of correlated and uncorrelated antenna elements
A communications device for separating source signals provided by M signal sources includes an antenna array comprising N antenna elements for receiving at least N different summations of the M...
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7106785 |
Adaptive antenna reception apparatus with weight updated adaptively
An adaptive antenna reception apparatus includes a multi-beam former ( 1 ) provided in common to users, to convert antenna-corresponding spread signals received by antennas of an array antenna into...
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RE39275 |
Hardware-efficient demodulator for CDMA adaptive antenna array systems
In the hardware-efficient demodulator for a CDMA adaptive antenna array mechanism of a mobile radio communication system, a correlators bank receives digital baseband signals received through an...
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7103384 |
Apparatus and method for forming a forward link transmission beam of a smart antenna in a mobile communication system
A method and apparatus for a base station including an antenna array calculates a direction of a weight vector of a transmission beam to maximize in-phase component power for a common channel...
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7079867 |
Semi-blind transmit antenna array device using feedback information and method thereof in a mobile communication system
There is provided a transmit antenna array device with at least two antennas and a method thereof in which a transmission beam is appropriately formed based on a weight vector to be transmitted to...
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