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| Number | Title | Issue Date |
| 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 |
| 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 |
| 7346365 | Smart antenna system and method A smart antenna apparatus including a receiving system, one or more beam analysis modules, a control channel monitoring module, a processing system, and a receiving beam switch is provided. The receiving system is operable to receive a plurality of uplink beams, eac... | 03/18/2008 |
| 7336739 | Cross-correlation signal detector A method, system, and computer program product are provided for detecting at least one signal of interest within an input signal. At least one set of samples from the input signal is multiplied by at least one set of samples representing a complex conjugate of the i... | 02/26/2008 |
| 7289058 | Radar apparatus The present invention relates to a radar apparatus that forms multiple digital beams based on reflected waves of a transmitted radio wave. A transmit signal is transmitted in a predetermined cycle from one of transmitting/receiving antennas A1 to A4 ar... | 10/30/2007 |
| 7283085 | System and method for efficient, high-resolution microwave imaging using complementary transmit and receive beam patterns A scanning panel for use in a microwave imaging system captures a microwave image of a target using two complementary arrays of antenna elements. Each of the antenna elements in a first array is capable of being programmed with a respective phase delay to direct a t... | 10/16/2007 |
| 7276990 | Single-pole multi-throw switch having low parasitic reactance, and an antenna incorporating the same A switch arrangement comprises a plurality of MEMS switches arranged on a substrate about, and close to, a central point, each MEMS switch being disposed on a common imaginary circle centered on the central point. Additionally, and each MEMS switch is preferably spa... | 10/02/2007 |
| 7251299 | Time delay estimator A system for time delay estimation in a discrete time processing system includes a cross correlator that performs cross correlation on a first signal and a second signal, and provides a cross correlated output signals indicative thereof. A lag smoother receives the ... | 07/31/2007 |
| 7251286 | 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 spatial location. Such methods and systems receive the plurality of tr... | 07/31/2007 |
| 7231151 | Cosite interference rejection system using an optical approach A cosite interference rejection system allows cancellation of large interfering signals with an optical cancellation subsystem. The rejection system includes an interference subsystem coupled to a transmit system, where the interference subsystem weights a sampled t... | 06/12/2007 |
| 7199752 | Phased null radar A method for reducing the interference between a source transmitting pulses and equipments having nominal bandwidths which are outside the nominal bandwidth of the transmitted pulses, but which respond to sideband energy of the pulses. Phase perturbations are applie... | 04/03/2007 |
| 7197336 | Method and apparatus to combine radio frequency signals The invention concerns 2-oxo-1-pyrrolidine derivatives and a process for preparing them and their uses. The invention also concerns a process for preparing α-ethyl-2-oxo-1-pyrrolidine acetamide derivatives from unsaturated 2-oxo-1-pyrrolidine derivatives. Particula... | 03/27/2007 |
| 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 frequency front end system configured to convert the received RF signals... | 03/13/2007 |
| 7187723 | Local oscillation signal supply method and circuit therefor With the object of accurately reproducing, by means of a small-scale circuit, differences in propagation delay at antennas of received signals that are received as input by way of each of a plurality of receivers, frequency data generator 6 supplies frequency... | 03/06/2007 |
| 7173561 | Radar device capable of scanning received reflection waves The present invention relates to a radar device for forming multi-beams in multiple channels from reflected waves of a transmitted wave by using a minimum number of antennas. The device has: antennas used for both transmission and reception A1–A4; tr... | 02/06/2007 |
| 7164704 | Beam forming for transmit using bluetooth modified hopping sequences (BFTBMH) A communication circuit (28) is designed with a signal processing circuit (370) arranged to produce a first plurality of data signals and receive a second plurality of data signals. A transmit circuit (364) is coupled to receive the first plural... | 01/16/2007 |
| 7116702 | Signal processing method and apparatus in CDMA radio communication system A method for processing signals in a multi-antenna CDMA radio communication system extracts control signals by despreading signals transmitted to a specific user through the antennas using a spreading factor, estimating weight values of respective ones of the antenn... | 10/03/2006 |
| 7088288 | Method and circuit for controlling an antenna system A method of controlling an antenna system of a wireless communication network having a plurality of cells is disclosed. The method comprises the steps of determining antenna weights to enable communication between a wireless communication network and the wireless co... | 08/08/2006 |
| 7031669 | Techniques for correcting for phase and amplitude offsets in a MIMO radio device Techniques to correct for phase and amplitude mismatches in a radio device in order to maintain channel symmetry when communicating with another device using MIMO radio communication techniques. Correction for the amplitude and phase mismatches among the plurality o... | 04/18/2006 |
| 6970133 | Antenna system and method of using same An antenna system includes a plurality of transmit elements spaced apart by a first dimension and a plurality of receive elements spaced apart by a second dimension, such that the first dimension is a non-integer multiple of the second dimension and the second dimen... | 11/29/2005 |
| 6948484 | Capacitor discharge ignition device A capacitor discharge ignition device is provided with a capacitor for storing charge to produce ignition energy; ignition coils that receive charge released from the capacitor on the primary side and generate a high voltage on the secondary side; a switching elemen... | 09/27/2005 |
| 6947733 | Method and apparatus for reducing self-interference in a mobile network A method for reducing interference in a mobile network in which a node A proposes a wireless link with node B. The method includes: (a) determining an angle between an incoming link from a node C to node B and the proposed node A to node B link, wherein the incoming... | 09/20/2005 |
| 6917331 | Signal detector employing coherent integration A signal detector is provided in which complex samples of a received signal are multiplied by data representative of a hypothesis, and the resulting product data is coherently integrated over a desired duration to provide correlation data representative of the level... | 07/12/2005 |
| 6876693 | Method for processing signal in communications system having plurality antennas The present invention relates to an adaptive algorithm and device for the same, for calculating a weight vector to be applied to an adaptive array antenna system, suggesting an adaptive algorithm suitable for calculating an autocovariance matrix of signal vectors of... | 04/05/2005 |
| 6823021 | 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 spatial location. Such methods and systems receive the plurality of tr... | 11/23/2004 |
| 6771219 | Adaptive beamforming method for smart antenna system An adaptive beamforming method for an antenna array is provided in which an array output is calculated based on a weight vector w, which is determined from an eigenvector corresponding to a maximum eigenvalueλ of a generalized eigenvalue problem consisting o... | 08/03/2004 |
| 6603427 | System and method for forming a beam and creating nulls with an adaptive array antenna using antenna excision and orthogonal Eigen-weighting A system and method for forming a beam and creating nulls. The inventive method combines frequency domain suppression technology for narrow-band jammer rejection with orthogonal weighting using Eigen analysis for jammer nulling and signal beam-forming for... | 08/05/2003 |
| 6577271 | Signal detector employing coherent integration A signal detector is provided in which complex samples of a received signal are multiplied by data representative of a hypothesis, and the resulting product data is coherently integrated over a desired duration to provide correlation data representative o... | 06/10/2003 |
| 6275188 | Nulling direct radiating array A nulling direct radiating array (30) that includes a main phased array (32) and a plurality of auxiliary arrays (70, 72, 74) symmetrically disposed about the main array (32). The main array (32) includes a plurality of antenna elements (34) and a beam fo... | 08/14/2001 |
| 6225948 | Method for direction estimation Signals in the form of wave elements of one or more subscriber signals are received at a receiving device assigned a number Ka of receiving sensors and the direction of the signals is estimated. Ka received signals are received via the receiving sensors a... | 05/01/2001 |
| 6218988 | Array antenna transmitter with a high transmission gain proportional to the number of antenna elements An array antenna is composed of an antenna section, adaptive transmission sections 3-1 to 3-M, and a transmission antenna weight-producing section 4. The antenna section has antenna elements 2-11 to 2-MN arrange... | 04/17/2001 |
| 6147645 | Adaptive reception diversity apparatus and adaptive transmission diversity apparatus By estimating the movement direction of a communication partner, the radiation pattern is forcibly rotated to thereby form a correct radiation pattern. Specifically, an apparatus of the present invention includes reception radiation pattern control sectio... | 11/14/2000 |
| 6067048 | Radar apparatus The object of the invention is to suppress relative power of grating lobes in electronic scanning radar apparatus. This radar apparatus is a radar apparatus comprising a transmitting antenna and a receiving antenna, the receiving antenna being an array an... | 05/23/2000 |
| 6056780 | Method for the positioning of electromagnetic sensors or transmitters in an array A method for positioning plural electromagnetic sensors in an array including the steps of: (1) designating one of the two sensors of the plural sensors that are a greatest distance apart as a point of origin of a reference system, (2) encoding in genotyp... | 05/02/2000 |
| 5990832 | Antenna array for base station for radiocommunication with mobiles This antenna array for base station for radiocommunication with mobiles comprises N first sensors, N being an integer greater than 2, arranged in such a way that the array exhibits substantially no ambiguity; an (N+1)th sensor placed or contriv... | 11/23/1999 |
| 5982327 | Adaptive array method, device, base station and subscriber unit The present invention provides a method, device, base station and subscriber unit for combining a plurality of antenna output signals to provide a combined data signal in a communication system where the antennas receive at least one user signal and where... | 11/09/1999 |
| 5920286 | Stabilisation of phased array antennas A method of stabilizing the action of a phased array antenna system in which the amplitudes and phases of signals applied to, or produced by, elements of the antenna are monitored, differences are detected and suitable weighting factors are determined and... | 07/06/1999 |
| 5852420 | Antenna device An antenna system is made up by a main antenna and a sub antenna which is adjacent the main antenna in a direction not perpendicular to the direction of beam scan of the main antenna and which has a beam axis coincident with a beam axis of the main antenn... | 12/22/1998 |
| 5841400 | Estimator of direction of desired signal A desired signal is received at first and second antennas. Output signals of the first and second antennas are orthogonal-detected by first and second signal conversion circuits and thereby converted into first and second baseband signals. A complex conju... | 11/24/1998 |
| 5757312 | Method and apparatus for hard-wired adaptive cancellation Hard-wired analog adaptive cancellation for microwave receivers to cancel the interference generated by co-located transmitter employs a circuit having two or more quadrature taps on a delay line. The least and greatest delays provided by the delay line t... | 05/26/1998 |
