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9041464 Circuitry for reducing power consumption  
Circuitry for reducing power consumption is described. The circuitry includes a power amplifier. The circuitry also includes a predistorter coupled to the power amplifier. The circuitry further...
9030254 RF channel amplification module with instantaneous power limiting function  
A radio frequency channel amplification module for communication satellite, comprises an input configured to convey an input radio frequency signal, an output configured to restore a pre-amplified...
9030255 Linearization circuit and related techniques  
Circuits and techniques to linearize the operation of an RF power amplifier are described. A linearizer circuit may include a non-amplification signal path which includes a delay line and an...
9007128 Method and apparatus for power amplifier linearization  
In an embodiment, a circuit includes a variable group delay configured to delay a wideband input signal to obtain a delayed input signal; a wideband operational amplifier configured to determine...
9000841 Method, system, and apparatus for RF switching amplifier  
Embodiments of RF switching amplifiers are described generally herein. Other embodiments may be described and claimed.
8995932 Transmitter noise suppression in receiver  
Systems and methods for suppressing transmitter noise in a receive band of a co-located receiver that are suitable for wideband applications are disclosed. In one embodiment, an analog radio...
8989253 Reconditioning equalizer filter for non-constant envelope signals  
A technique for a reconditioning equalizer filter for non-constant envelope signals is described. The input to a transmitter chain is modified by a reconditioning equalizer filter, prior to being...
8982991 Digital pre-distortion method and apparatus thereof for changing memory degree depending on input level  
An apparatus and a method for operating a memory compensation Digital Pre-Distortion (DPD) are provided. In the method for operating a memory compensation DPD system, an input signal is received....
8975959 Monotonic conversion of RF power amplifier calibration data  
Circuitry, which includes data memory and processing circuitry, is disclosed. The data memory is used to store look-up table (LUT)-based radio frequency (RF) power amplifier (PA) calibration data....
8965727 Intelligent low noise design  
An automated phase noise test measurement system includes a software controlled phase shifter to maintain quadrature so that a carrier may be removed from a signal provided by UUT. In this...
8965454 Amplifier system for cell sites and other suitable applications  
In one embodiment, an amplifier system has a tap, a delay filter, a linearized amplifier, and a hybrid combiner. The tapped portion of an input signal is amplified by the amplifier, the untapped...
8957730 Signal processing apparatus and amplification apparatus  
A signal processing apparatus includes a corrector that corrects a digital signal in accordance with a correction value, a converter that converts the digital signal corrected by the corrector...
8957729 Memory structure having taps and non-unitary delays between taps  
A method and apparatus for memory modeling in a pre-distortion architecture are disclosed. In one embodiment, a memory model has a plurality of branches. Each branch receives a different output...
8952754 Linearization of heterogeneous power amplifier systems  
Systems and methods are provided for adaptive linearization of an amplifier system having a plurality of heterogeneous amplifier paths. An amplifier system includes a plurality of amplifier paths,...
8952758 Amplifier using nonlinear drivers  
A device includes a Doherty amplifier having a main path and a peaking path. The Doherty amplifier includes a main amplifier configured to amplify a signal received from the main path and a...
8933752 Power amplifier apparatus, distortion compensation coefficient updating method, and transmission apparatus  
A power amplifier apparatus that includes a processor that performs a first distortion compensation processing on an input signal using a distortion compensation coefficient to obtain a first...
8928404 Amplifier performance stabilization through preparatory phase  
A method and related systems for amplifier performance stabilization of a digitally predistorted RF power amplifier are disclosed. The characteristics of power amplifiers change as a function of...
8929484 Communications transmitter having high-efficiency combination modulator  
A communications transmitter includes a baseband processor configured to generate amplitude, angle, in-phase and quadrature baseband signals and a combination modulator that is configurable to...
8917141 Radio frequency power amplifier circuit and method  
An amplifier circuit is disclosed for providing a radio frequency output signal having a variable signal envelope, comprising a main amplifier device and an auxiliary amplifier and a combiner...
8912848 Digital pre-distortion device and method for a broadband power amplifier  
According to the present invention, a digital pre-distortion device and method for use in a dynamic spectrum allocation system, which uses a breadband frequency range, such as a cognitive radio...
8914271 Method for predistorting signals for non-linear components in the presence of long term memory effects  
A method and system for predistorting signals provides a test signal to model a non-linear component. Model kernels representative of static and dynamic parts of the model are extracted from an...
8908797 Apparatus and method for time alignment of an envelope tracking power amplifier  
An apparatus and method for a Time Alignment (TA) operation used by an Envelope Tracking (ET) Radio Frequency (RF) Power Amplifier (PA) that amplifies RF signals are provided. The ET RF PA has an...
8890609 Systems and methods for band-limited adaptation for PA linearization  
Systems and methods are disclosed for providing band-limited power amplifier linearization. In one embodiment, a system includes a power amplifier configured to amplify a power amplifier input...
8884714 Apparatus, system, and method for digital base modulation of power amplifier in polar transmitter  
An amplifier receives an amplitude signal of a polar modulated signal at a base terminal of a transistor and receives a phase modulated carrier signal of the polar modulated signal at the base...
8872583 Power amplifier with advanced linearity  
An amplifier is provided. The amplifier includes an input matching unit suppressing harmonic components of an input signal; a high power amplification unit amplifying a signal suppressed by the...
8855232 Transmission apparatus and transmission method  
A transmission apparatus includes a signal processing unit to perform a distortion compensation process on a transmitting signal based on a distortion compensation coefficient, and an updating...
8855233 Method and apparatus for implementing digital baseband predistortion  
An apparatus for implementing digital baseband predistortion includes a transmission channel including a digital-to-analog converter, a modulator, an amplifier and a power amplifier, and further...
8849187 Radio frequency amplifier noise reduction system  
An amplifier for controlling or reducing broadband noise is disclosed. An amplifier determines whether a useful signal is being amplified and controls the gain of the amplifier at least when...
8843089 Pre-distortion for a radio frequency power amplifier  
Coefficients of a pre-distorter are determined for distortion correction of a signal amplified by a radio frequency amplifier by sampling the signal at the pre-distorter input to generate a...
8836426 Adaptive linearizer with narrowband feedback path  
An ISI Replica unit is provided, which produces interference components similar to one due to LPF into the output of HPA MODEL unit. An HPA MODEL unit models the characteristic of HPA using the...
8837633 Systems and methods for digital processing based on active signal channels of a communication system  
A communication system includes digital signals that carry data and correspond to channels of a composite signal to be transmitted across a communication channel. Active channels are detected and...
8837620 Adaptive multi-channel transmitter linearization system using a shared feedback receiver  
Pre-distortion techniques, devices and systems for a multi-channel transmitter are described. An adaptation time is provided for each of the transmit chains in the multi-channel transmitter....
8830008 Generator of a modulated radiofrequency signal, method for calibrating the generator, and magnetic resonance imaging system  
A generator of a high-power modulated signal, a method for calibrating the generator, and a magnetic resonance imaging system. The generator includes means for generating a sinewave signal...
8817900 Frequency-domain peak power reduction  
A system and method are provided for frequency domain peak power reduction on a plurality of orthogonal frequency divisional multiplexing (OFDM) signals in a communications system, wherein...
8811532 Architecture and the training method of a PA DPD system with space mapping applied in the predistorter  
Systems and methods are disclosed for compensating for non-linearity of a power amplifier using space mapping based predistortion. In one embodiment, a transmitter includes a power amplifier that...
8804871 Non-linear adaptive scheme for cancellation of transmit out of band emissions  
A method and apparatus for a non-linear adaptive scheme for transmit out of band emission cancellation is provided. Embodiments disclosed herein provide a method for removing unwanted transmitter...
8803607 Power amplifier  
There is provided a power amplifier capable of increasing linear output power and efficiency without sacrificing an overall gain by employing a vector modulation function in a driving stage, with...
8798198 Calibration systems for wireless electronic devices  
A calibration system may be provided for calibrating wireless communications circuitry in an electronic device during manufacturing. The calibration system may include data acquisition equipment...
8798559 FIR/IIR filter predistorter for power amplifiers exhibiting short-term and/or long-term memory effects  
The present disclosure generally relates to predistortion that compensates for non-linearity of a power amplifier as well as short-term and long-term memory effects of the power amplifier. In one...
8787598 Dynamic contoured-sound/subwoofer-synthesis audio system  
A dynamic sound enhancement system and method which produces non-linear dynamic gain, time domain offset, and damping control in relation to frequency components of an applied audio signal. The...
8787438 Reconditioning equalizer filter for non-constant envelope signals  
A technique for a reconditioning equalizer filter for non-constant envelope signals is described. The input to a transmitter chain is modified by a reconditioning equalizer filter, prior to being...
8779851 Linearizing a power amplifier  
A circuit for linearizing a power amplifier. The circuit includes a main signal path comprising a digital-to-analog converter, wherein a main signal is transmitted through the main signal path to...
8781415 Distortion correction based feedforward control systems and methods for radio frequency power sources  
A distortion module includes a first module, at least one module and a correction module. The first module is configured to (i) receive radio frequency signals from radio frequency sensors of a...
8773201 Amplifying device and wireless transmission device using the same  
An amplifying device 1 of the present invention performs distortion compensation on distortion appearing in input-output characteristics of an amplifier 4 based on an input signal and an output...
8774258 PAPR (peak-to-average power ratio) determining device and communication device  
A PAPR determining device includes a detecting unit and a PAPR determining unit. The detecting unit detects a predetermined value's changes, which is a cause of changes in a saturation power of a...
8766718 Systems and methods for adaptive power amplifier linearization  
An exemplary system comprises a linearizer, a power amplifier, and a feedback block. The linearizer may be configured to use a predistortion control signal to add predistortion to a receive signal...
8750416 Compensating for a radio frequency amplifier  
An analog radio frequency input and an analog feedback from an output of a radio frequency amplifier are digitized and down-converted. Pre-distortion coefficients are calculated based on the...
8749312 Optimizing cascade gain stages in a communication system  
Techniques for optimizing a cascade gain device comprising at least two gain stages are disclosed. A first noise figure associated with the first gain stage is incrementally increased by a...
8737529 Multiple antenna signal transmission  
Embodiments for at least one method and apparatus of transmitting a transmission signal through a plurality of antennas are disclosed. One method includes generating at least one dynamically...
8736365 Broadband linearization module and method  
A system including a power amplifier and a pre-distortion module coupled to the power amplifier. The pre-distortion module includes one or more smaller versions of the power amplifier to generate...