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US20110136448 UPLINK POWER CONTROL SCHEME  
An uplink power control technique may include a simplified maximum sector throughput (SMST) and a generalized maximum sector throughput (GMST). The SMST and GMST techniques may be used to...
US20120071115 Method of Controlling RF Transmissions to Mitigate Interference with Critical Care Medical Equipment  
Various methods of mitigating RF inference with one or more critical care medical devices is provided, wherein a predetermined threshold energy acceleration value is associated with the one or...
US20130260701 Method of Controlling RF Transmissions to Mitigate Interference with Critical Care Medical Equipment  
Various methods of mitigating RF interference with one or more critical care medical devices is provided, wherein a predetermined threshold energy acceleration value is associated with the one or...
US20140141735 RF Transmitter Having Broadband Impedance Matching for Multi-Band Application Support  
Systems and methods are provided for a broadband, closed-loop RF transmitter for multi-band applications that employs a single RF path to service multiple bands of operation. Embodiments of the...
US20120071116 MU MIMO SUPPORT WITH HIGHLY DIRECTIONAL ANTENNAS  
In various embodiments, a network controller in a multi-user multiple input multiple output (MU MIMO) network may perform training for directional communications with multiple mobile devices. It...
US20100022205 Wireless Microphone Beacon  
Disclosed is a method and system for a radio beacon to protect wireless microphones from interference. One embodiment involves providing each wireless microphone system with a signal detector that...
US20090124218 RF Transmitter with Heat Compensation and Method Therefor  
An RF transmitter (10) includes an RF amplifier (22) that experiences gain-droop distortion as a result of self-heating. A heat compensator (20) is included to insert a gain boost of an amount...
US20060105723 Simple crest factor reduction technique for non-constant envelope signals  
A technique for Crest Factor reduction of non-constant envelope signals is described. The input to any nonlinear circuit is modified by a Crest Factor reduction circuit, prior to being applied to...
US20120164950 Cognitive Radio Transmission  
A method, an apparatus, and a computer program for performing cognitive communications in a radio environment are presented. First, a radio communication device estimates a time-varying...
US20120322395 REJECTION OF RF INTERFERERS AND NOISE IN A WIRELESS COMMUNICATIONS TRANSCEIVER  
The invention provides a radio receiver or transceiver having one or more low noise amplifiers corresponding to one or more antenna inputs wherein one or more outputs of the one or more low noise...
US20110159821 METHOD AND SYSTEM FOR IMPROVING WIRELESS LINK ROBUSTNESS USING SPATIAL DIVERSITY  
A system and method for using spatial diversity for improving link quality, particularly wireless link communication. A plurality of propagation paths are used simultaneously for a wireless link,...
US20130182698 PN Selection for RF Repeaters, Bi-Directional Amplifiers or Distributed Antenna Systems  
Presented herein are methods and systems for providing network access at a slave node based on a signal transmitted by a master BTS. In one example, a pseudorandom code (PN code) selection is...
US20120148068 COEXISTENCE OF WHITE SPACE DEVICES AND WIRELESS NARROWBAND DEVICES  
Architecture that enables wireless narrowband devices (e.g., wireless microphones) and white space devices to efficiently coexist on the same telecommunications channels, while not interfering...
US20070218848 PHASE ERROR DE-GLITCHING CIRCUIT AND METHOD OF OPERATING  
A system including a phase comparator to compare a first signal and a second signal to generate a phase error signal, and a controller to generate an adjusted phase error signal from the phase...
US20120171974 Noise Suppression  
The present invention relates to a method of suppressing noise in a communication device. The idea consists in forwarding to a noise suppression module some information regarding the radio...
US20140106690 Interference Reduction  
Measures for interference reduction for an envelope branch type transmitter. Such measures may include determination of a target frequency span for reducing interference caused by an envelope...
US20110255636 DISTORTION COMPENSATION CIRCUIT, TRANSMITTING APPARATUS AND DISTORTION COMPENSATING METHOD  
A distortion compensation circuit for compensating for the distortion characteristics of an amplifier, includes a distortion compensating coefficient calculating element and a distortion...
US20120100819 MOBILE WIRELESS COMMUNICATIONS DEVICE WITH REDUCED HARMONICS RESULTING FROM METAL SHIELD COUPLING  
A mobile wireless communications device includes a housing, antenna, and circuit board carried by the housing and having radio frequency (RF) circuitry operative with the antenna for receiving and...
US20070129025 Open loop polar transmitter having on-chip calibration  
An on-chip calibration system comprises a transmitter, a receiver, a phase and amplitude determination element configured to determine amplitude and phase characteristics of an output signal...
US20130005282 Reducing Out-Of-Band Emission  
Disclosed is a transmitter for a communication system. The transmitter comprises a sidelobe suppression module configured to apply a suppression matrix to an input vector comprising symbols to be...
US20070281631 Arrangement for transmitting signals via an antenna feed line in a mobile radio subscriber station  
The invention relates to an arrangement for transmitting signals via an antenna feed line in a mobile subscriber station, particularly in a vehicle, such as, for example, a road motor vehicle,...
US20090023404 Controlling a Receiver  
A receiver 650 operates in close proximity to at least one other component 610, 611, 612 causing interferences in signals received by the receiver 650. It is determined (steps 2002; 2003) whether...
US20100003920 PEAK SUPPRESSING AND RESTORING METHOD, TRANSMITTER, RECEIVER, AND PEAK SUPPRESSING AND RESTORING SYSTEM  
A peak suppressing and restoring method includes suppressing a peak of a signal, starting suppression when a suppression start value is lower than a suppression target value, using a function of a...
US20070238422 BUILT-IN TESTING SIGNAL WIRELESS COMMUNICATION APPARATUS AND TESTING METHOD THEREOF  
A wireless communication apparatus has: a direct current generator, for generating a direct current signal and a transmitter. The transmitter includes: an oscillating signal generator for...
US20080032641 APPARATUS AND METHOD FOR ATTENUATING LEAKAGE SIGNAL OF TRANSMITTER IN COMMUNICATION SYSTEM  
An apparatus and method for attenuating a leakage signal of a transmitter in a communication system is provided. The apparatus includes a local oscillator, a mixer, and a leakage signal...
US20090097590 Distortion-Compensated RF Transmitter and Method Therefor  
An RF transmitter (10) includes an RF amplifier (28) that generates an amplified RF signal (36) including a linear RF signal (92) and a spurious baseband signal (94). The spurious baseband signal...
US20130194979 OPTIMAL SWITCHING FREQUENCY FOR ENVELOPE TRACKING POWER SUPPLY  
A radio frequency (RF) communications system, which includes an RF power amplifier (PA) and an envelope tracking power supply, is disclosed. The RF communications system processes RF signals...
US20130115899 PEAK SUPPRESSION ON MULTICARRIER  
A ceiling value can be established (505) for a sum of peak power for a first baseband signal (330) and a second baseband signal (332). No correlation needs to exist between the power peaks of the...
US20100130144 TECHNIQUES FOR IMPROVING TRANSMITTER PERFORMANCE  
Exemplary embodiment are directed to preserving transmitter linearity in RF transceivers while reducing RX band noise for use with low-power voltage supplies. In one aspect, a programmable...
US20150249474 MIXING STAGE, MODULATOR CIRCUIT AND A CURRENT CONTROL CIRCUIT  
A mixing stage includes a first modulation stage that receives an input signal from a first common node of the mixing stage, a first local oscillator input that receives a local oscillator signal,...
US20150065071 MIXING STAGE, MODULATOR CIRCUIT AND A CURRENT CONTROL CIRCUIT  
A mixing stage includes a first modulation stage that receives an input signal from a first common node of the mixing stage, a first local oscillator input that receives a local oscillator signal,...
US20130065544 DYNAMIC TRANSMITTER CALIBRATION  
A method includes generating an indicator of interference introduced by a transmitter into a spectrum of an output transmit signal outside a target channel of the transmitter. The indicator is...
US20130040587 DISTORTION COMPENSATION DEVICE, DISTORTION COMPENSATION METHOD, AND RADIO TRANSMITTER  
A distortion compensation device includes: a frequency-characteristic adding unit configured to add a frequency characteristic to an error signal to generate an added error signal, the error...
US20070129026 Circuit arrangement for reducing a crest factor, and method for reducing a signal dynamic range  
To reduce the crest factor of a total signal, the signal dynamic range is corrected in baseband upstream of the interpolation filters. To this end, provision is made for the input of a correction...
US20080064336 MOBILE COMMUNICATION TERMINAL FOR REMOVING NOISE IN TRANSMITTING SIGNAL AND METHOD THEREOF  
A mobile communication terminal for removing noise in a transmitting signal and a method thereof are provided. The mobile communication terminal includes a first microphone for capturing a voice...
US20140235185 Envelope Tracking Power Amplifier System with Delay Calibration  
An envelope tracking power amplifier system time-aligns a supply voltage to an input signal to a power amplifier. The power supply operates in a static mode for low amplitude input signals and...
US20080242244 SYSTEM HAVING A FILTER  
A system having a filter is disclosed. One embodiment includes at least two polyphase filter branches, each of the polyphase filter branches including a respective recursive allpass filter,...
US20050181746 Methods and systems for signal amplification through envelope removal and restoration  
Embodiments of the present invention comprise systems, methods, and devices for amplifying electromagnetic signals by decomposing each signal into a plurality of near-constant envelope signals,...
US20090149140 POWER CONTROL UTILIZING MULTIPLE RATE INTERFERENCE INDICATIONS  
Systems and methodologies are described that facilitate mitigation of interference in a wireless communication environment. Terminals can utilize interference information provided by neighboring...
US20100022207 TRANSMITTER  
To provide a transmitter wherein even in a case of sharing a detector circuit between or among a plurality of transmitting circuits, a high degree of detection accuracy can be achieved without...
US20080233901 Radio Communication Apparatus and Peak Suppression Method  
A radio communication apparatus enabling reduction in peak-to-average power ratio without decreasing the transmission efficiency. In this apparatus, buffer section 103 temporarily stores input...
US20130217349 Post Filter for Spectral Domain Echo Cancellers to Handle Non-Linear Echo Components  
The present document discloses a method and system for improving echo cancellation in the presence of non-linear distortions. A circuit attenuates a transmit signal in one or more spectral bands...
US20090163154 Method For Compensating Signal Distortions in Composite Amplifiers  
A method for compensating signal distortions in multiple transmitting branches (3, 5; 43, 45, 46) entering a composite amplifier (1; 1′). According to the invention the method comprises the steps...
US20090168863 POLAR TRANSMITTER WITH DIGITAL AND ANALOG FILTERING OF ENVELOPE  
A calibration circuit measures the variation in a filter resistor within the analog domain of the envelope path of a polar transmitter and produces a digital value representative of that...
US20090168921 TRANSMISSION SPECTRA  
The present invention relates to transmitter devices and transmission methods of transmitting a modulated GMSK- or EDGE-signal in a transmission system, wherein normally the pulse shaping follows...
US20140273895 WIRELESS INTERFACE WITHIN TRANSMITTER  
A process transmitter is configured to measure a process variable of an industrial process. The process transmitter includes a process variable sensor which senses the process variable and...
US20110028107 SPECTRUM SENSING NETWORK  
In accordance with various embodiments methods, systems and devices are generally described for assigning a reputation value to a cognitive device in a communications system. Some of the described...
US20070287444 Other-cell interference-based uplink control  
A method and corresponding equipment for use by a mobile station and/or a radio access network, for altering one or more characteristics of transmissions of the mobile station to a base...
US20110151808 System And Method For Power Control For A Surface Acoustic Wave (SAW) Filter-Less Transmitter  
A power control system includes a transmitter having a plurality of gain-adjustable elements, a switchable attenuator located at an output of the transmitter, a gain-adjustable power amplifier...
US20140287704 COMBINATION OF STEERING ANTENNAS, CPL ANTENNA(S), AND ONE OR MORE RECEIVE LOGARITHMIC DETECTOR AMPLIFIERS FOR SISO AND MIMO APPLICATIONS  
Logarithmic Detector Amplifiers (LDAs), multiple antennas, active antennas, and multiple active antennas and receivers are provided in a variety of configurations that are synchronized to reduce...

Matches 1 - 50 out of 161 1 2 3 4 >