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| Number | Title | Issue Date |
| 8111191 | Wideband antenna pattern Embodiments of the invention include a method to control an antenna pattern of a wideband array antenna wherein a wideband array antenna unit comprising the wideband array antenna and transforming means is accomplished. Embodiments of the invention further include t... | 02/07/2012 |
| 8106827 | Adaptive array control device, method and program, and adaptive array processing device, method and program An adaptive array control device is described. The adaptive array control device includes a first array processing section and a second array processing section in which phase responses are almost opposite with respect to a target signal and a signal incoming from a... | 01/31/2012 |
| 7825857 | System, method and apparatus for reducing the effects of low level interference in a communication system An adaptive antenna array control system and associated method is provided for continuously and automatically assigning resources to either protect against strong interferers or to shade a spatial region, reducing gain in that spatial region, to protect against pote... | 11/02/2010 |
| 7800539 | Null-fill antenna, omni antenna, and radio communication equipment A wide-angle null-fill antenna with no null in the depression angle range, an omni antenna using the same, and radio communication equipment. A null-fill antenna comprises a first antenna array including antenna elements arranged with a prescribed point as the cente... | 09/21/2010 |
| 7629927 | Method for forming a beam of an array antenna and apparatus therefor A method for forming a beam in an array antenna to orient a null point of the array antenna to a mobile station which acts as interference, includes the step of: forming a beam in such a manner that, based on a moving speed of the mobile station acting as interferen... | 12/08/2009 |
| 7557752 | Apparatus and method for communication There is provided a communication method including: generating a channel estimated value for each antenna by performing channel estimation using a received signal by each antenna; calculating reception weights by which subcarriers assigned the received signal of eac... | 07/07/2009 |
| 7463193 | Beam forming system A compact system can use modular components to enhance the isolation or quality of signals that an antenna array produces. The system can comprise an array of input coupler modules and an array of output coupler modules respectively on the input and output sides of ... | 12/09/2008 |
| 7432857 | Adaptive antenna apparatus provided with a plurality of pairs of bidirectional antennas An adaptive antenna apparatus is provided with a total of four or more, even number N of antennas including a plurality of pairs of antennas each having a bidirectional characteristic. The N antennas are provided respectively at vertexes of a polygon of the same num... | 10/07/2008 |
| 7423588 | Phased array antenna system The present antenna system includes a phased array antenna system comprising a limiting circuit, an isolation circuit, and a phasing circuit. The limiting circuit includes a system of fast signal diodes coupled with a zener diode, which provides sharp limiting and i... | 09/09/2008 |
| 7373176 | Coordination of beam forming in wireless communication systems A method and system for coordinating the use of beam forming between two communicating entities in a wireless communication system is disclosed. The two entities may communicate control information regarding their respective use of beam forming. A correction factor ... | 05/13/2008 |
| 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 |
| 7362261 | Linear frequency-modulated pulse radar A linear frequency-modulated pulse radar system is provided in which the echo signal is mixed with a de-ramp signal, in order to reduce the bandwidth. The transmission signal of the pulse radar and the de-ramp signal are generated with the same reference oscillator,... | 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 |
| 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 |
| 7359689 | Wireless receiving method A wireless receiving method includes calculating a transmission channel response from a reception signal and a reference signal, determining reliabilities of a plurality of transmission channel responses calculated using reception signals received at different time ... | 04/15/2008 |
| 7339918 | Method for improving the quality of data transmission A method for improving the quality of data transmission in cellular radio systems utilizes time division multiple access, in which the strength of a signal received at a base station is measured and a decoder for soft decision-making is employed. The method includes... | 03/04/2008 |
| 7340254 | Measurement opportunities for a mobile unit operating with a switched beam antenna in a CDMA system Measurement opportunities are provided to a wireless transmit/receive unit (WTRU) operating with a switched beam antenna in a CDMA wireless communication system. The switched beam antenna is a smart antenna generating a plurality of directional beams and an omni-dir... | 03/04/2008 |
| 7333830 | Method and apparatus for synchronizing WLAN in a multi-mode radio system Methods and apparatus for synchronizing Wireless Local Area Network (WLAN) communication within a multi-mode radio. A multi-mode radio can support communication with a WLAN and at least one other wireless communication system. The multiple systems can be distinct an... | 02/19/2008 |
| 7330801 | Signal separation using rank deficient matrices A communications device includes an antenna array for receiving different summations of source signals from a plurality of signal sources, a receiver coupled to the antenna array for receiving the different summations of source signals, and a signal separation proce... | 02/12/2008 |
| 7330068 | Adjusting coefficients of a filter Demodulation apparatus includes a transversal filter characterized by coefficients adjusted by a coefficient determiner responsive to a constant modulus error signal and variable mode error signal related to the output of a spectral mean frequency detector having it... | 02/12/2008 |
| 7324047 | Adaptive antenna apparatus for selecting adaptive control processing according to detected signal quality and radio communication apparatus using the same An adaptive antenna apparatus includes two antenna elements and a parasitic element to which a variable reactance element is connected, and selects an adaptive control process according to detected signal quality. A controller executes a first adaptive control proce... | 01/29/2008 |
| 7324042 | Monostatic radar beam optimization A method and system for optimizing transmit beam and receive beam antenna radiation patterns. The method includes inputting initial estimate of beam weights for a transmit beam and a receive beam to an optimizer; and using a cost function to optimize beam weights so... | 01/29/2008 |
| 7324817 | Wireless communication method and apparatus for selecting and reselecting cells based on measurements performed using directional beams and an omni-directional beam pattern A wireless communication method and apparatus for selecting and reselecting cells used by a wireless transmit/receive unit (WTRU) in a wireless multi-cell communication system. The WTRU includes a switched beam antenna configured to form a plurality of directional b... | 01/29/2008 |
| 7321636 | Communication device with smart antenna using a quality-indication signal Communication is performed for a first communication device having a set of antenna elements. A quality-indication signal is received from a second communication device. A complex weighting is calculated based on the quality-indication signal. A pre-transmission sig... | 01/22/2008 |
| 7317898 | Mote networks using directional antenna techniques A mote network having and/or using one or more directional antennas. ... | 01/08/2008 |
| 7315764 | Integrated circuit, method, and computer program product for recording and reproducing digital data An integrated circuit to control a media player/recorder having a wireless receiver, a storage device, and an output circuit, wherein the wireless receiver receives a signal representing encoded media data, and a method and computer program product for same. It comp... | 01/01/2008 |
| 7315279 | Antenna system for producing variable-size beams An antenna system has multiple antenna feed elements combined in a number of element sets independently controlled to provide a beam of a variable size. Multiple input power dividers are provided for dividing an input signal, and multiple phase controllers are respe... | 01/01/2008 |
| 7302232 | Adaptive antenna control method and adaptive antenna transmission/reception characteristic control method An adaptive antenna control method is used for a radio communication system built by a plurality of radio base stations and a plurality of terminal stations capable of communicating with the radio base stations. Each radio base station includes an adaptive antenna h... | 11/27/2007 |
| 7295811 | Method for performing measurements for handoff of a mobile unit operating with a switched beam antenna in a wireless communication system, and corresponding system Measurements for handoff are made by a wireless transmit/receive unit (WTRU) operating with a switched beam antenna in a wireless communication system. The switched beam antenna is a smart antenna generating a plurality of directional beams and an omni-directional b... | 11/13/2007 |
| 7289827 | Method and apparatus for performing directional re-scan of an adaptive antenna An antenna for use with a receiver in a wireless communications system includes antenna elements for generating antenna patterns, and a first module for applying weights to a signal received at each of the antenna elements to generate a selected one of the antenna p... | 10/30/2007 |
| 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 |
| 7289828 | Method for steering a smart antenna for a WLAN using a periodic re-scan A smart antenna steering algorithm performs a periodic re-scan at an end of a sustained use period and before a next sustained use period. During a sustained use period, a re-scan of the other antenna beams is not performed. The periodic re-scan is performed on alte... | 10/30/2007 |
| 7277053 | Apparatus and methods for detecting and locating signals A discrete three-dimensional receiving element has multiple sensors scattered over its surface to detect and locate a signal. The sensors facing the signal detect the signal, and a boundary line is drawn between the sensor which detect the signal and those which don... | 10/02/2007 |
| 7274936 | Method and apparatus for measuring channel quality using a smart antenna in a wireless transmit/receive unit A method and apparatus for measuring a channel quality in wireless transmit/receive units (WTRUs) which are equipped with a subscriber based smart antenna. The WTRUs are equipped with a smart antenna so that the WTRU generates a plurality of directional beams and, o... | 09/25/2007 |
| 7272359 | Communicating signals according to a quality indicator using multiple antenna elements One or more quality indicators are established at a first communication device having antenna elements. The quality indicators indicate a quality of one or more communication links between the first communication device and one or more second communication devices. ... | 09/18/2007 |
| 7262732 | Method and apparatus for fast satellite acquisition via signal identification The invention relates to a method and apparatus for fast satellite antenna acquisition via signal identification. The method and apparatus operate by positioning a satellite antenna using signal identification in order to reduce false satellite signal locks and miss... | 08/28/2007 |
| 7263083 | Radio communication device and arrival direction estimation method A receiver having an array antenna estimates arrival directions of multiple paths that arrive with an angular spread. Consequently, arrival direction estimation accuracy can be ensured without increasing throughput even if the power every path is low by estimating a... | 08/28/2007 |
| 7257418 | Rapid user acquisition by a ground-based beamformer A method for rapid acquisition of a specific subscriber by a ground-based beamformer includes the steps of defining a coverage area as an arrangement of a plurality of cells wherein one of the plurality of cells includes a specific subscriber; defining a partition o... | 08/14/2007 |
| 7257153 | Method of synchronizing a receiver, and a receiver The invention relates to a method for synchronizing a receiver (1) with a transmitted code-modulated spread spectrum signal. The method uses at least one reference code (r(x)), which corresponds to a code used in the modulation. The frequency shift of the tra... | 08/14/2007 |
| 7257425 | System and method for providing a smart antenna A smart external antenna module is proposed for wireless systems. The module allows the advantages of smart antennas to be easily added to existing wireless systems without any modification to the transceiver. Specifically, the smart antenna module weights and combi... | 08/14/2007 |
