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| Number | Title | Issue Date |
| 8145174 | Orthogonal cross polarization interference compensating device, demodulator, receiving station, and method of compensating cross-polarization interference An orthogonal cross-polarization interference compensating device for solving the problem in which integration contents of an integration circuit are indefinite when a control loop is cut. An orthogonal cross-polarization interference compensator generates a compens... | 03/27/2012 |
| 8081945 | Feedback cancellation system and method A system and method for detecting antenna coupling and for providing feedback cancellation in response to the antenna coupling includes a signal feedback cancellation circuit configured to be coupled between a signal receiver and a signal transmitter. The feedback c... | 12/20/2011 |
| 8081944 | Wireless transmitter receiver A wireless monitoring receiver and system use multiple video data feeds from a plurality of cameras. The video feeds are transmitted using a multi-antenna technique, and decoded by a multi-antenna processor. The resulting transmissions are resistant to noise, interf... | 12/20/2011 |
| 8023916 | Onboard reception device, and noise cancellation method for onboard reception device This onboard reception device includes: a first receiver; a second receiver which is tuned to a second frequency which is different from a first frequency to which the first receiver is tuned, and whose reception level is low; a noise cancellation means which cancel... | 09/20/2011 |
| 8019305 | Interference reduction for multiple signals The present invention reduces the degradation in performance of one or more radio signals that are co-transmitted with a first radio signal from the same transmitting antenna in the same frequency channel and received by the same antenna due to multipath or other sh... | 09/13/2011 |
| 8014745 | High isolation multiple carrier system architecture for communications A compensation apparatus for an integrated communication system is disclosed. The integrated communication system can include a first communication device having a first transmitter antenna, and a second communication device having a second receiver antenna, wherein... | 09/06/2011 |
| 7937057 | Radio communication device A spatial filtering adaptable for an interference wave that appears unsteadily can be implemented and also an interference canceling ability can be increased even in a condition that the interference wave does not steadily exist. At a time of non-active communicatio... | 05/03/2011 |
| 7907925 | Method and system for blocker attenuation using multiple receive antennas Methods and systems for blocker attenuation using multiple receive antennas are disclosed. In this regard, a plurality of signals may be received via a corresponding plurality of antennas and a corresponding plurality of interference-suppressed signals may be genera... | 03/15/2011 |
| 7546105 | Interference rejection in radio receiver The invention relates to interference cancellation in a receiver in a radio system. The receiver receives at least two input data signals, and extracts an interference estimate signal specific to each input data signal. An interference estimate signal covariance mat... | 06/09/2009 |
| 7532874 | Offset balancer, method of balancing an offset and a wireless receiver employing the balancer and the method The present invention provides an offset balancer for use with a differential mixer employing a wireless reception and an offset quantifier configured to indicate an existing DC offset of the mixer corresponding to an existing second-order intercept point applicable... | 05/12/2009 |
| 7519346 | Interference reduction for multiple signals The present invention reduces the degradation in performance of one or more radio signals that are co-transmitted with a first radio signal from the same transmitting antenna in the same frequency channel and received by the same antenna due to multipath or other sh... | 04/14/2009 |
| 7509109 | Adaptive correction of a received signal frequency response tilt Distortion due to transmission characteristics of a transmission medium is corrected by measuring leakage in a signal orthogonal to a received signal. The frequency response of an equalizer is adaptively adjusted until the measured leakage is at a local minimum.... | 03/24/2009 |
| 7502603 | DC cancellation in zero-IF receivers Improved DC cancellation in zero-IF receivers for eliminating the DC offset that otherwise would be caused by the AC voltage on a coupling capacitor at the time of switching from AC coupling to DC coupling. The coupling capacitor normally is connected first as a hig... | 03/10/2009 |
| 7457603 | Processing architecture for a receiving system with improved directivity and signal to noise ratio A receive system providing enhanced directivity in the form of a narrowed receive beam and a relatively small antenna with performance comparable to a much larger antenna at similar frequencies. Received signals are converted to digital values and stored in a manner... | 11/25/2008 |
| 7443339 | Cross-correlation suppression technique for position location receivers The present disclosure provides various methods and devices for suppressing cross-correlation effects in positioning signals. When there is a power imbalance between a weaker positioning signal and an interfering positioning signal, and certain Doppler offsets exist... | 10/28/2008 |
| 7440739 | Smart antenna device with increased operation speed and complex smart antenna device using smart antenna device A smart antenna device includes: first and second weighting units provided to correspond to two antennas disposed apart from each other so as to weight received signals inputted from the antennas, respectively; an operating unit that obtains a ratio of a weight of t... | 10/21/2008 |
| 7433665 | Apparatus and method for converting single-ended signals to a differential signal, and transceiver employing same A communication circuit for an Ethernet or other network transceiver includes a first sub-circuit having a first input which receives a composite differential signal including first and second differential signal components, a second input which receives a different... | 10/07/2008 |
| 7433384 | System and method for received signal prediction in wireless communications system Method and apparatus to compute the combiner coefficients for wireless communication systems for a space-time solution. One embodiment trains the weights on a signal known a priori that is time multiplexed with other signals, such as a pilot signal in a High Data Ra... | 10/07/2008 |
| 7430407 | Circuitry and method for processing receive signals of a receive system A circuit for providing enhanced directivity in the form of a narrowed receive beam and a relatively small antenna with performance comparable to a much larger antenna at similar frequencies. Received signals are converted to digital values and stored in a manner wh... | 09/30/2008 |
| 7392016 | Data transmission rate control A method includes monitoring a variable-rate data communication channel to determine its signal-to-noise ratio, and adjusting the data transmission rate of the variable rate data communication channel based on its signal-to-noise ratio. ... | 06/24/2008 |
| 7389096 | Monitoring system using multi-antenna transceivers A wireless monitoring receiver and system use multiple video data feeds from a plurality of cameras. The video feeds are transmitted using a multi-antenna technique, and decoded by a a multi-antenna processor. The resulting transmissions are resistant to noise, inte... | 06/17/2008 |
| 7379741 | Sub-carrier allocation method for reducing inter-cell interference in OFDM cellular environment A sub-carrier allocation method including selecting a number of cells having a strongest inter-cell interference among cells in a multiple-cell environment, and selecting mutually exclusive sub-carrier sets for each cell selected having the strongest interference. | 05/27/2008 |
| 7376210 | Apparatus and method for performing adaptive channel estimation in a mobile communication system Disclosed is an adaptive channel estimator for improving a performance of a general channel estimator in a mobile communication system, and a method for controlling the same. The adaptive channel estimator further detects a noise level of a channel and a channel spe... | 05/20/2008 |
| 7369832 | Receiving diversity apparatus and method of mobile station for high data rate type mobile communication system A receiving diversity apparatus and method for a mobile station in an HDR mobile communication system measures C/I values of pilot channels on respective antennas, measures a C/I value of in-phase combined pilot channel, and then selectively performs one of a select... | 05/06/2008 |
| 7363011 | Method and apparatus for estimating the impulse response of a radio channel based on a calculated correlation sequence A method and a correspondingly operative radio receiver (10) (in either user equipment or a base transceiver station of a cellular telecommunication system) by which the radio receiver (10), in receiving signals transmitted over a radio channel, estima... | 04/22/2008 |
| 7356309 | Directional coupler for communication system An improved directional coupler that significantly reduces the signal degradation problems associated with distortion caused by circuit elements used to measure the transmitted power. In a selected embodiment, the directional coupler of the present invention compris... | 04/08/2008 |
| 7353013 | Mobile wireless communications device with polarization diversity wireless local area network (LAN) antenna and related methods A mobile wireless LAN communications device may include a portable, handheld housing, and a wireless LAN transceiver carried by the housing. A polarization diversity wireless LAN antenna may be included for cooperating with the wireless LAN transceiver to communicat... | 04/01/2008 |
| 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 |
| 7336938 | Phase-alternating mixer with alias and harmonic rejection Rejection of local oscillator alias response is provided in a mixing circuit by (1) a switching mixer producing an output that changes at least twice between two states (e.g., high-low-high or low-high-low) during each local oscillator period, and (2) a charge integ... | 02/26/2008 |
| 7336745 | Methods and apparatus to provide communication protection technology for satellite earthstations An interference signal canceling system for communications protection is described for canceling interference signals from earth station received signals using a two input adaptive cancellation network. The present invention addresses terrestrial, co-channel and adj... | 02/26/2008 |
| 7333558 | Digitally pre-equalizing signals In one embodiment, the present invention includes an transmitter apparatus having a digital filter to compensate in a baseband frequency for magnitude and delay slopes occurring in the transmitter's analog path. ... | 02/19/2008 |
| 7327995 | Active resistance summer for a transformer hybrid A transmit canceller comprises an operational amplifier having a first polarity input terminal, a second polarity input terminal, and an output terminal. A feedback element communicates with the second polarity input terminal and the output terminal. A first input r... | 02/05/2008 |
| 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 |
| 7324794 | Phase combining diversity Embodiments of methods of receiving transmitted signals are disclosed. The methods include a first antenna receiving a second signal, a second antenna receiving a second signal, adjusting a phase relationship between the first signal and the second signal, combining... | 01/29/2008 |
| 7324618 | Apparatus and method for canceling narrow-band interference in a mobile communication system An apparatus and method for canceling narrow-band interference in a wideband mobile communication system. The apparatus includes a down converter for down converting a received signal into a baseband signal, an analog-to-digital converter for converting the baseband... | 01/29/2008 |
| 7317898 | Mote networks using directional antenna techniques A mote network having and/or using one or more directional antennas. ... | 01/08/2008 |
| 7313194 | Method for phase noise mitigation in MIMO-OFDM systems A phase noise mitigation method which mitigates phase noise for MIMO-OFDM. A criterion is provided which jointly optimizes both spectral efficiency and receiver performance by determining the best number of pilots. ... | 12/25/2007 |
| 7313122 | Multi-user carrier frequency offset correction for CDMA systems “Multiple approaches are presented herein to perform CFO correction within CDMA systems having multiple users. Any communication receiver may be adapted to perform the CFO correction in this manner CDM. One approach assumes a diagonal CFO matrix to decouple the di... | 12/25/2007 |
| 7313374 | Low-latency DC compensation A method of performing DC estimation and correction in the presence of an automatic gain control function introduces no long-term delay of the signal. When the automatic gain control function indicates that it has altered the gain or when an initial DC estimate is r... | 12/25/2007 |
| 7310537 | Communication on multiple beams between stations The present invention relates to a method and a communication system wherein stations communicate on a wireless interface. The method includes the steps of including beam identity information into signals transmitted on multiple beams provided by a first station, re... | 12/18/2007 |
