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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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7310503 |
Diversity reception device and diversity reception method
The circuit size of a diversity receiver for an orthogonal frequency division multiplexing signal is reduced, and the diversity effect is increased, by providing a power ratio comparator that...
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7305216 |
Transmitting and receiving arrangement with interference signal suppression control
A transmitting and receiving arrangement is disclosed having a transmission path, a reception path, and a control device for suppression of interference signals which are produced by crosstalk from...
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7305213 |
Receiver and wireless LAN apparatus in which a received signal is correlated to a reference symbol
A receiver comprising: an antenna which receives a radio signal including N possible symbols {c 1 (n) , c 2 (n) , . . . c M−1 (n) , c M (n) }, an N correlation units which are provided...
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7298803 |
Methods and apparatuses for filtering common mode interference
In one embodiment, a method that includes detecting a level on each of a plurality of data channels; summing the levels of a subset of data channels to get a summed level, the subset of data...
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7295813 |
Current reduction by dynamic receiver adjustment in a communication device
A method for reducing current drain in a communication device includes a first step of detecting interference including intermodulation and crossmodulation products. A next step includes...
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7292833 |
Reception system for multisensor antenna
The present invention relates to a receiving system for a multi-sensor antenna and comprising:
at least one set of channel filters (310 j , 710 k , 1 . . . N) filtering the signals X i (t,f)...
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7280814 |
Wireless frequency re-use determination systems and methods
A method of measuring frequency interference between adjacent cell sites in a wireless telecommunications system. The method includes selecting a frequency in a cell site to be used as a beacon...
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7269238 |
Receiving method and receiver
The invention relates to a receiver and a receiving method in a receiver of a radio system. The method comprises: receiving ( 500 ) signal with an array antenna comprising at least two antenna...
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7266350 |
Radio frequency tuner
A tuner for analogically and digitally modulated signals comprises a single tuner arrangement for converting any selected analog or digital channel to baseband or zero 1F quadrature signals. Simple...
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7248835 |
Method for automatically switching a profile of a mobile phone
A method for automatically switching a profile of a mobile phone includes measuring a current environmental noise value of ambient noise surrounding the mobile phone. The current environmental...
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7236750 |
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....
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7228104 |
Adaptive canceller for frequency reuse systems
An adaptive interference canceller for canceling an interfering signal corresponding to a delayed, frequency translated, amplitude and phase offset version of a transmitted signal contained in a...
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7227917 |
Reducing effects of self-created interference on broadband reception
The invention relates to a method for reducing effects of self-created digital radio frequency interference on broadband reception. In the method a DVB-T (Digital Video Broadcasting—Terrestrial)...
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7221958 |
Received signal filtering for enhanced selectivity
A delay-and-add filtering technique positions one or more filter nulls substantially at points of narrowband interference in a relatively wideband received signal. For example, the technique is...
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7221925 |
Broadcast receiver with antenna/frequency diversity
Noise and multipath distortions in a broadcast receiver are reduced by an optimal antenna/frequency diversity concept in which the distortions in the audio signal are evaluated to choose a...
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7209515 |
Multistage reception of code division multiple access transmissions
Reducing multiple access interference in the radio frequency communications path between the network base station and UE. The preferred methods include interleaving STAP and MUD in a plurality of...
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7184736 |
Apparatus and method for dynamic DC offset detection and cancellation using high pass filter with variable impedance and corner frequency
A fixed impedance in parallel with a variable impedance form a high pass filter with a capacitor. An input signal is provided to the capacitor. The value of the variable impedance is controlled in...
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7181245 |
Wireless transmitter, transceiver and method
Provided is an apparatus adapted to transmit a first channel on at least two adjacent fixed beams of a plurality of fixed beams defining a coverage area, with each pair of adjacent fixed beams of...
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7177616 |
High linearity and low noise CMOS mixer and signal mixing method
Method and apparatus are provided for high linearity and low noise communication signal mixing. The apparatus includes a high linearity low noise mixer having an input stage coupled to a switch...
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7177614 |
Narrowband noise mitigation in location-determining signal processing
System and method for mitigating the effects of narrowband noise in a location-determining signal are provided, wherein the location-determining signal is associated with a periodic reference...
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7177613 |
Reducing noise and distortion in a receiver system
A receiver, implemented with low noise and low distortion, to process an input signal containing signals of interest and unwanted interference signal. In an embodiment, the receiver contains a...
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7149407 |
Orthogonal heterodyne optical signal-to-noise-ratio (OSNR) monitoring method and apparatus
An orthogonal heterodyne in-band optical signal-to-noise-ratio (OSNR) monitoring method and apparatus that use the polarization characteristics of two narrow bandwidth filtered optical spectral...
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7142834 |
Noise removing circuit
An object is to provide a noise removing circuit that can be integrally formed on a semiconductor substrate and can improve the accuracy of noise component removal. The noise removing circuit...
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7139592 |
Null deepening for an adaptive antenna based communication station
A method and apparatus is described for modifying a smart antenna processing strategy determined from a set of signals received at an array of antenna elements of a wireless station, such as a set...
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7139543 |
Distortion reduction in a wireless communication device
The present invention provides a technique for cancellation of jammer signals in a radio frequency receiver. A radio frequency signal contains both a desirable signal and an undesirable jammer...
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7123893 |
Wireless frequency re-use determination systems and methods
A method of measuring frequency interference between adjacent cell sites in a wireless telecommunications system. The method includes selecting a frequency in a cell site to be used as a beacon...
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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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7088978 |
System and method for interference cancellation in a wireless communication receiver
A communication receiver improves its channel estimation performance, its equalization performance, or both, by modeling the non-Gaussian characteristics of a dominant source of interference in a...
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7085536 |
Method and apparatus for dynamically resolving radio frequency interference problems in a system
In one embodiment, there is provided a method comprising determining if one or more devices in a system is a conflicting device which device which conflicts with a wireless communications interface...
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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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7079828 |
Method and apparatus for side-lobe cancellation in wideband radio systems
In a multi-user radio receiver, a method and apparatus for reducing the effects of non-linear distortion due to adjacent channel interference (ACI) includes receiving and processing a multi-user...
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7076228 |
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...
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7076227 |
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....
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7072627 |
Method and apparatus for adjusting signal component strength
A first signal component is received having a first signal strength and a second signal component is received having a second signal strength. A difference is identified between the first signal...
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7072614 |
Communication device
Communication device comprising a transmitter and a receiver, coupled to antenna means respectively via a transmitter output and a receiver input. For an effective and reliable reduction of...
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7068977 |
Method and system for interference assessment and reduction in a wireless communication system
A method and system is disclosed for reducing interference in a wireless communication system utilizing an antenna array. The antenna array uses one or more signal channels for communicating with...
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7043217 |
Combining reception method and apparatus
A method and apparatus is provided for calculating possible values of a combination ratio for signals received via a plurality of antennas (A 1 to An) according to different algorithms by means of...
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7039360 |
External noise intrusion prevention device, signal amplifier, protector and antenna plug
An external noise intrusion prevention device preventing intrusion of external noise into a central conductor of a trunk cable in an up signal frequency band is provided. A first filter circuit 3 ...
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7013116 |
MIMO systems having a channel decoder matched to a MIMO detector
A method and apparatus for reducing the number of erred bits in the decoded signal by using a channel decoder whose transfer characteristic is matched to the transfer characteristic of the MIMO...
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