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Telecommunications > Transmitter > Noise Or Interference Elimination > Predistortion (e.g., For Power Amplifier) Predistortion (e.g., For Power Amplifier)Predistortion (e.g., For Power Amplifier) patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.02/08/07 - 20070032208 - Apparatus and method for amplifying multi-mode power using pre-distorter A method and an apparatus for amplifying power in a communication system is disclosed that includes a detection module which detects a power level of a predetermined signal selected from among an input signal and an output signal of a power amplifier and then transmits an operation mode control signal ... 01/11/07 - 20070010215 - Apparatus for removing distortions created by an amplifier A power amplifier has a non-linear low power pre-distortion amplifier (112) for transforming a carrier signal (111) to a pre-distorted signal (113) having a carrier component with out-of-phase non-linear distortions, and a non-linear power amplifier (114) having non-linear characteristics similar to a portion of the non-linear low power pre-distortion amplifier ... 12/07/06 - 20060276147 - Power series type predistorter for multi-frequency bands operation A power series type predistorter for multi-frequency bands includes a linear transmission path PL provided with a delay element 5 and distortion generating paths PD1 and PD2 for a plurality of frequency bands in parallel; wherein each of the distortion generating paths PD1 and PD2 for a plurality of frequency ... 12/07/06 - 20060276146 - Multi-band lookup table type predistorter A lookup table type predistorter for reading out distortion compensation data by using a difference signal between a power amplifier input signal and an output signal as a reference signal; wherein N input side variable band signal extractors extract transmitting signals in N frequency bands from the input signal, N ... 11/30/06 - 20060270365 - Method and device for power amplifier with high accuracy of an ouput signal The invention relates to a method for improving the output signal accuracy of a transmitter with a forward branch for converting an input signal into a signal for transmission. The forward branch comprises an adaptation unit (103) for applying a predistortion to the input signal and a power amplifier (106). ... 11/23/06 - 20060264187 - Method for determining a model for an electrical network and use of the method An electrical network having a nonlinear transfer response is approximated with a system with memory. The system with memory being approximated in the frequency domain and subsequently being expanded in the time domain. A transfer response of the system being approximated to a transfer response of the electrical network in ... 10/26/06 - 20060240786 - Method and system for broadband predistortion linearization The invention relates to a method and system for wideband digital pre-distortion linearization, which is used to overcome the influence of memory effect in radio frequency power amplifier, to expand digital pre-distortion linearization bandwidth, and to improve digital pre-distortion linearization performance. The method and system can get an in-band pre-distortion ... 10/12/06 - 20060229036 - Method for predistortion of a signal, and a transmitting device having digital predistortion, in particular for mobile radio A method is proposed for signal processing with predistortion. An amplifier circuit is provided for this purpose, whose operating states are characterized by at least one characteristic variable. A digital modulation signal having two components (R, φ), as well as a power word (LS), derived from the first component (R), ... 09/28/06 - 20060217083 - Rf power amplifier system employing an analog predistortion module using zero crossings An RF amplifier system employing an analog predistortion module is disclosed. The disclosed analog predistortion module is based on zero crossings of the gain error curves (AM-AM and AM-PM curves minus DC). The hardware structure uses the product of first-order functions avoiding the need for large differential swings in the ... 08/10/06 - 20060178120 - Transmitting/receiving device having a polar modulator with variable predistortion The transmitting/receiving device has a polar modulator with a variable predistorter (11, 12) and an amplifier (8) which can be modulated, a reception path (25) which can be operated both during conventional reception and for the purposes of adjustment of the predistorter (11, 12) in order to determine a measurement ... 07/06/06 - 20060148428 - Precoding of contention words in a fixed wireless access system A fixed wireless access communications system comprises an access point and a plurality of subscriber units. Each subscriber unit (502) contends for access to a communications channel to the access point by transmitting a contention word to the access point during a contention time slot. The contention word is predistorted ... 06/29/06 - 20060141955 - Data transmission method, base station and transmitter for compensating for non-linearities in a transmission chain A transmitter compensates for the non-linearities within a transmission chain. The transmitter includes, for instance, a first forming device for forming, on the basis of at least one set of signal properties, at least one state expansion vector comprising quantities characterizing a signal. The transmitter includes a modifier for modifying ... 03/02/06 - 20060046665 - System and method for digital memorized predistortion for wireless communication An embodiment of the invention is a system for signal processing in preparation for wireless transmission, the wireless transmission being from a portable wireless communication device and including use of a power amplifier having nonlinear characteristics. The system includes memory for storing digitally-indexed information. The digitally-indexed information models nonlinear characteristics ... 02/23/06 - 20060040624 - Peak power limitation in an amplifier pooling scenario A method and a device for performing peak power limitation are described. A transmitter stage (14) according to the invention comprises a distributing component (18) for distributing the accumulated power of beams or sectors according to a specific distribution scheme among a plurality of power amplifiers (261. . . 264). ... 12/15/05 - 20050277389 - Circuit arrangement for a wideband mixer with predistortion and high linearity Circuit arrangement for a wideband mixer (1, 101, 201) with a multiplicative mixing stage (2) which exhibits a carrier frequency input (3, 4) for coupling in a differential carrier frequency signal (LOP, LON), a mixing stage input (5, 6) for coupling in a predistorted differential input signal (LFPD, LFND), and ... 11/17/05 - 20050255814 - Apparatus and method for compensating for an offset of a power amplifier in a mobile communication system An apparatus and method for compensating for an error of a power amplifier in a digital mobile communication system having a predistorter are provided. The apparatus and method comprise a gain compensator for pre-correcting a gain error occurring in a path of each phase signal while an in-phase signal and ... 09/22/05 - 20050208905 - High frequency power amplifier module, and wireless communication system A high frequency power amplifier module of a multistage amplifier construction comprising: an input terminal; an output terminal; a control terminal; and a mode switching terminal. The first amplification stage includes a dual gate FET, and a bias voltage according to a signal is applied to the first gate and ... 07/28/05 - 20050164656 - Distortion compensation amplifying apparatus and base station In a network employing code division multiplex access, a distortion compensation amplifying apparatus is provided which is capable of making quick response to carry out the distortion compensation with high accuracy even if the signal power to be inputted thereto varies rapidly. In this distortion compensation amplifying apparatus, the renewal ... 06/30/05 - 20050143025 - Transmitting apparatus Disclosed is a transmitting apparatus having a distortion compensator that corrects distortion of an amplifier. In this transmitting apparatus, a first frequency converter mixes local oscillation signals with a distortion-compensated transmit signal to thereby up-convert transmit-signal frequency to a radio frequency and input the resultant signal to the amplifier; a ... 06/23/05 - 20050136859 - Crest factor reduction and amplitude pre-distortion for multi-carrier signals A technique for Crest Factor reduction and amplitude pre-distortion of multi-carrier signals is described. The input to the multi-carrier amplifier is modified by a Crest Factor reduction and amplitude pre-distortion circuit, prior to being applied to the amplifier. The Crest Factor reduction and amplitude pre-distortion circuit first clips the amplitude ... ### FreshPatents.com Support |