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| Number | Title | Issue Date |
| 8174444 | Method of correlating known image data of moving transmitters with measured radio signals Systems and methods of correlating potential transmitters with received radio signals is provided. Image data is provided including paths traveled by potential transmitter. Potential transmitters are identified within the image data along with path segments traveled... | 05/08/2012 |
| 8154453 | Positioning method, program thereof, and positioning device A positioning method includes: executing a first correlation accumulation process on a received signal, a positioning signal spread-modulated with a spread code, and a replica code of the spread code while shifting a phase of the replica code in a first phase search... | 04/10/2012 |
| 8040278 | Adaptive antenna beamforming Adaptive antenna beamforming may involve a maximum signal-to-noise ratio beamforming method, a correlation matrix based beamforming method, or a maximum ray beamforming method. The adaptive antenna beamforming may be used in a millimeter-wave wireless personal area ... | 10/18/2011 |
| 8031117 | Blind signal separation using polarized 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 source signals. At least two of the N antenna elements are correlated an... | 10/04/2011 |
| 8009098 | Staccato pulse edge correlation The present invention discloses a system and method for mitigating multipath in DSSS CDMA radio navigation signals by a) transmitting a rapid pulsing pattern from a transmitting device to a position receiver that samples the transmitted signal, b) separating the rec... | 08/30/2011 |
| 7952519 | Method and system for detecting GNSS spoofing signals Methods and systems for detecting GNSS signals originating from an inauthentic source. A synthetic array using a receiver antenna which is randomly spatially translated may be used to gather alleged GNSS signals. The signals are then processed to determine the spati... | 05/31/2011 |
| 7893872 | Method and apparatus for performing blind signal separation in an OFDM MIMO system A method and apparatus for performing blind signal separation in an orthogonal frequency division multiplexing (OFDM) multiple-input multiple-output (MIMO) system are disclosed. A transmitter generates a plurality of spatial streams of data and transmits the spatial... | 02/22/2011 |
| 7859461 | 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 plurality of distinct measurements using a plurality of antenna weight ... | 12/28/2010 |
| 7683834 | Undulating transmit patterns for multiple simultaneous transmitters to support signal separation at a receiver A communications system includes multiple mobile wireless communications devices transmitting at a same time to a fixed receiver assembly. Each mobile wireless communications device transmits a source signal defined by a respective character set comprising a plurali... | 03/23/2010 |
| 7679560 | Method and apparatus for adaptive direction estimation of radio waves In an environment of spatially correlated additive noise, the direction estimation apparatus for coherent signals calculates (M−q−1) instantaneous cross-correlations between some array data, and selecting multiple pairs each of which is consisted of p instantane... | 03/16/2010 |
| 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 receiving propagation of an interference pattern traveling along a path that ... | 09/22/2009 |
| 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 the array geometry. The system utilizes the cross correlation of the ou... | 08/04/2009 |
| 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 estimating the number of the incoming radio waves, including: a corre... | 11/11/2008 |
| 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 set of transform function selected from a plurality of sets of transfor... | 09/30/2008 |
| 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 for a signal arriving within a guard interval section from the head ... | 09/09/2008 |
| 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 directivities of the individual array elements and does not degrade t... | 09/09/2008 |
| 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 of the M source signals, with N and M being greater than 1. A receiver... | 08/19/2008 |
| 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 determining a direction of arrival of the signal using data from the... | 08/19/2008 |
| 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 positioning, beacon devices and a processing unit. The beacon devices tr... | 08/12/2008 |
| 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 least M different summations of the M source signals. The at least M di... | 08/05/2008 |
| 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 through a plurality of transmission antennas, and a plurality of mobile ... | 07/29/2008 |
| 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 different summations to a receiver assembly. The receiver assembly in... | 07/08/2008 |
| 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 includes a transmitter for transmitting timing information from the server... | 05/06/2008 |
| 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 applied to develop an Eigen matrix U that is used in developing estim... | 05/06/2008 |
| 7369877 | Multi-channel demodulation with blind digital beamforming A system and method for receiving communication signals is provided. According to the method, a plurality of communication signals is received, each communication signal comprising one or more source signals. The plurality of communication signals are multiplexed in... | 05/06/2008 |
| 7365682 | System and method for distributed signal compression for cooperative geolocation A cooperative geolocation system and method. The system and method involves time stamping a plurality of received signals and modifying, such as compressing, one or more of the received signals, either with the same or with different rates of compression. A processi... | 04/29/2008 |
| 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 information generating unit that generates first phase error information ind... | 04/29/2008 |
| 7366225 | Apparatus and method for receiving data in a mobile communication system using an adaptive antenna array technique A mobile communication system receives a reception signal of a reception signal, and performs a control operation such that a weight for generating a reception beam is calculated using a first technique if a difference between an error sum value at a current time an... | 04/29/2008 |
| 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 least one of the symbols in the character set is transmitted at a diff... | 04/22/2008 |
| 7362830 | Smart antenna system and method Disclosed is a smart antenna system and method. The present invention uses a gradient value closer to a true gradient in weight estimation using the correlation matrix having both of the Hermitian and Toeplitz properties, thereby shortening a convergence speed of th... | 04/22/2008 |
| 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 plurality of distinct measurements using a plurality of antenna weight ... | 04/22/2008 |
| 7362267 | Smart antenna, method and apparatus for adaptive beam forming A beam forming method for a smart antenna and smart antennas configured to employ the method, in which pre-multibeam processing and time delay aligning are implemented to array signals, and then a suboptimum weight is calculated by means of a pilot frequency symbol,... | 04/22/2008 |
| 7362732 | Tracking control in a CDMA system A tracking circuit includes a plurality of phase sections each corresponding to different phases of a despreading code. Each of the phase sections includes a correlator for producing a correlation value between a reception signal and a corresponding phase of the spr... | 04/22/2008 |
| 7359733 | Beam synthesis method for downlink beamforming in FDD wireless communication system A method for downlink beamforming in a frequency-division-duplex wireless communications system comprising a base station with an antenna array and terminals that are physically remote from said base station, the method comprising the steps of: receiving at said bas... | 04/15/2008 |
| 7359718 | Location determination and location tracking in wireless networks The present invention is directed to systems and methods which monitor a network environment, collect client information available online, and refine location determinations of individual clients based on observed information as well as online information. More part... | 04/15/2008 |
| 7352688 | High data rate wireless bridging A specialized preamble is provided to facilitate matrix channel estimation of a MIMO channel. In a particular implementation, a channel training preamble provided by the IEEE 802.11a standard is modified to facilitate MIMO channel estimation. ... | 04/01/2008 |
| 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, where K | 03/25/2008 |
| 7349461 | Efficient back-end channel matched filter (CMF) An efficient method and apparatus for implementing a back-end channel matched filter in a receiver is disclosed. A typical channel matched filter embodiment includes a peak detector for establishing processing synchronization from a despread signal, a channel estima... | 03/25/2008 |
| 7339979 | Adaptive beamforming methods and systems that enhance performance and reduce computations Wireless communication systems and methods are provided that a) enable progressive beamforming with antenna arrays and subarrays, b) provide current and delayed versions of data-carrying signals, and c) provide time-of-arrival of data-carrying signals. The progressi... | 03/04/2008 |
| 7340279 | Wireless communications with an adaptive antenna array Systems and techniques for parallel demodulation and searching using an adaptive antenna array with a processor configured to control the adaptive antenna to search for a first signal with the first beam and to receive a second signal for demodulation with a second ... | 03/04/2008 |
