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US20150139362 PULSE SHAPING CIRCUIT FOR IMPROVING SPECTRUM EFFICIENCY AND ON-OFF KEYING (OOK) TRANSMITTER INCLUDING PULSE SHAPING CIRCUIT  
A pulse shaping circuit is configured to shape a waveform of an edge of a signal applied to a switch of a power amplifier included in an on-off keying transmitter.
US20140355718 DEVICE FOR MODIFYING TRAJECTORIES  
The invention relates to a device for modifying trajectories.
US20150063828 Generalized Transmit Pre-Coding for Optical and Backplane Channels  
Systems that allow for DFE functionality to be eliminated from the receiver side of a communication system and for a DFE-like functionality to be implemented instead at the transmitter side of the...
US20140211886 ALL-DIGITAL MULTI-STANDARD TRANSMITTER ARCHITECTURE USING DELTA-SIGMA MODULATORS  
The present disclosure is concerned with a digital transmitter using Delta-Sigma modulators (DMSs) that uses an up-sampler and modulator block that follows the DSMs to generate the RF equivalent...
US20090310709 Amplitude modulated pulse transmitter  
An amplitude modulated pulse transmitter designed to operate across a multi MHz range of modulation frequencies. A wire wound rare earth magnet is to be utilized instead of the typical modulation...
US20100303171 SYSTEM AND METHOD PERFORMING QUADRATURE AMPLITUDE MODULATION BY COMBINING CO-SETS AND STRONGLY CODED CO-SET IDENTIFIERS  
A method of encoding a stream of data elements is provided which involves splitting the stream of data elements into a first stream and a second stream; encoding the first stream to produce a...
US20080192861 POLAR MODULATOR WITH SIGNED AMPLITUDE REDUCING PHASE TRANSITIONS  
A polar modulator including a signal converter configured to provide a phase signal and an amplitude signal based on at least one received signal is disclosed. A digital-to-analog converter is...
US20140003548 NFC Device with PLL Controlled Active Load Modulation  
A wireless communication device for communicating in the near-field via active load modulation. The device including an antenna configured to receive a magnetic field, a recovery device configured...
US20060018404 Radio frequency transmitter and method of operating a radio frequency transmitter  
A radio frequency transmitter comprising an I/Q modulator for obtaining a modulated output signal from an in-phase signal and a quadrature phase signal, and an I/Q modulator control loop...
US20050163247 Isolation barrier for interfacing a line side device to a system side device  
According to one embodiment, an isolation barrier comprises a transformer and a controlled impedance module. The system side device generates an amplitude modulated clock signal when the system...
US20130010849 WIRELESS TRANSMISSION SYSTEM AND WIRELESS TRANSMITTER, WIRELESS RECEIVER, WIRELESS TRANSMISSION METHOD WIRELESS RECEPTION METHOD AND WIRELESS COMMUNICATION METHOD USED WITH SAME  
A wireless transmission system includes a wireless HDMI transmitter and a wireless HDMI receiver. The wireless HDMI transmitter includes a carrier oscillator provided for each channel of an HDMI...
US20100061483 PULSE RADIO TRANSMISSION APPARATUS AND TRANSCEIVER  
A radio transmission apparatus has a first duty adjustment circuit which changes a duty of a clock signal, a second duty adjustment circuit which changes the duty of the clock signal to a duty...
US20080240291 PRE-EMPHASIS AUTOMATIC ADJUSTING SYSTEM, METHOD OF ADJUSTING PRE-EMPHASIS AND PRE-EMPHASIS SETTING SIGNAL GENERATING CIRCUIT  
A pre-emphasis automatic adjusting system is provided which is capable of placing the best suitable emphasis against attenuation occurring in a through hole. A step signal is transmitted from a...
US20140056341 SYSTEMS/METHODS OF ADAPTIVELY VARYING A BANDWIDTH AND/OR FREQUENCY CONTENT OF COMMUNICATIONS  
A bandwidth that is allocated to a transmitted waveform need not be contiguous in frequency space and a frequency content of the transmitted waveform may vary, as needed, even on a signaling...
US20130121444 DRIVER CIRCUIT FOR DRIVING A POWER AMPLIFIER  
A circuit for providing AM/PM modulation is described. The circuit includes a signal generator, which provides two phase modulated (PM) signals used to form two drive signals which are later...
US20090175380 Complex Signal Scaling for Phase and/or Amplitude Modulated Signals  
A signal scaling device (D), for a transmission path of a wireless communication equipment, comprises a processing means (PM) adapted to receive a phase and/or amplitude modulated signal (I/Q) to...
US20090060089 POLAR MODULATION TRANSMITTER CIRCUIT AND COMMUNICATIONS DEVICE  
Provided is a transmitter circuit capable of operating with low distortion and high efficiency even in a modulation method using wide modulation bandwidth. In the transmitter circuit, a signal...
US20110286539 ADAPTIVE MODULATION METHOD, RADIO COMMUNICATION SYSTEM, AND RADIO DEVICE  
A radio device (10) receives signals from a radio device (20) through a plurality of downlink channels that have different frequencies, decides modulation formats that have transmission...
US20100232546 Relay Link Control Channel Design  
A method for wireless communication is provided. The method comprises transmitting a relay downlink control information (R-DCI) block in a plurality of resource blocks.
US20140355717 RADIO FREQUENCY TRANSMITTER WITH EXTENDED POWER RANGE AND RELATED RADIO FREQUENCY TRANSMISSION METHOD  
A radio frequency transmitter includes a digital power amplifier and a bias control circuit. The digital power amplifier is arranged for receiving at least a radio frequency input signal, a...
US20120063545 Method and System for Enhancing Efficiency by Modulating Power Amplifier Gain  
Aspects of a method and system for enhancing efficiency by modulating power amplifier (PA) gain are presented. Aspects of the system may comprise a PA gain modulator that enables modification of...
US20120300879 High Bandwidth Modulation and Transmission  
This disclosure relates systems and methods for a high bandwidth modulation and transmission of communication signals.
US20060029158 Amplitude peak cancellation  
A method of preventing amplitude peaks from appearing in a processed signal that has been generated from at least one baseband signal by one or more signal processing operations is described. The...
US20080137774 MODULATION-INDEX ADJUSTABLE AMPLITUDE SHIFT KEYING TRANSMITTER  
Provided is a modulation-index adjustable amplitude shift keying (ASK) transmitter including: a bias current supply unit supplying one or more bias currents in response to a digital signal that is...
US20100075615 High Speed Serial Link with Power Spectral Density Frequency Response Suppression  
This disclosure relates to noise suppression in data transfers in transceivers of wireless devices.
US20070014381 Polar loop radio frequency (RF) transmitter having increased dynamic range amplitude control  
A closed loop power control system for a radio frequency (RF) transmitter comprises a first variable gain element located in a power control loop and configured to receive a power level signal and...
US20130208829 SYSTEM FOR SIMULTANEOUS TRANSMISSION OF MORSE SIGNALLING OVER A RADIO COMMUNICATION USING DIGITAL TECHNOLOGY  
System for simultaneous transmission (1) of Morse signaling over a radio communication using digital technology, comprising: a signal generator (2) with at least one digital modulation which...
US20090168854 De-Emphasis Circuit for a Voltage Mode Driver Used to Communicate Via a Differential Communication Link  
A circuit for de-emphasizing information transmitted via a differential communication link includes a voltage mode differential circuit and a bi-directional current source circuit. The voltage...
US20100086081 MODULATION DEVICE AND DEMODULATION DEVICE  
Provided is a modulation device which generates a phase modulation signal and an amplitude modulation signal and can correct an I/Q orthogonal shift and reduce degradation of the ON/OFF ratio. In...
US20050254597 Method and apparatus to reduce undesired amplitude modulation  
A transmit circuit reduces undesired amplitude modulation (AM) in transmit signal pulses by substituting predetermined amplitude information for actual pulse amplitude information during portions...
US20150003566 METHOD AND APPARATUS FOR POWER SUPPLY MODULATION OF A RADIO FREQUENCY SIGNAL  
A transmitter power supply modulates an RF signal without needing to run a calibration/training cycle every time an exciter or PA module is switched in and out or every time the transmitter powers...
US20050197076 Radio communication device and control method of amplification circuit thereof  
In a radio communication device which generates a baseband signal based on inputted transmit data, then modulates the baseband signal to a modulating signal, amplifies the modulating signal in a...
US20090041156 UWB System Employing Gaussian Minimum Shift Key Modulation, Common Mode Signaling, and Beamforming  
A multi-mode transmission system supporting OFDM and single-carrier signals is configured to perform interpolation and decimation such that the ratio of the interpolation factor to the decimation...
US20090111390 RADIO COMMUNICATIONS SYSTEM DESIGNED FOR A LOW-POWER RECEIVER  
The invention relates to methods by which radio signals can be transmitted to, and received by, a radio receiver such that the receiver consumes very little power from a battery or energy source....
US20090074106 MULTI-MODE AND MULTI-BAND TRANSMITTERS FOR WIRELESS COMMUNICATION  
Transmitters supporting multiple modulation modes and/or multiple frequency bands are described. A transmitter may perform large signal polar modulation, small signal polar modulation, and/or...
US20110188603 Compact pulse shaping for QM-MSK and PAM/QAM transmission  
Compact pulse shape partial response (CPS PR) signaling is developed for trellis based signals like QM-MSK, and for PAM/QAM type signals to improve the performance to bandwidth tradeoff. Compact...
US20100254490 Variable-Size Mixer for High Gain Range Transmitter  
Implementations of a high gain range transmitter with variable-size mixers are described.
US20120027127 AMPLIFIER  
An amplifier includes a separating unit, a generator, first to fourth switching amplifiers, and an outputting unit. The separating unit separates a pulse signal into a first separated pulse signal...
US20140146752 LAYER SHIFTING IN OPEN LOOP MULTIPLE-INPUT, MULTIPLE-OUTPUT COMMUNICATIONS  
Embodiments of the present disclosure describe methods, apparatuses, and systems related to use of interphase/quadrature component layer shifting in open loop multiple-input, multiple-output...
US20100135435 METHOD OF ESTIMATING FADING COEFFICIENTS OF CHANNELS AND OF RECEIVING SYMBOLS AND RELATIVE SINGLE OR MULTI-ANTENNA RECEIVER AND TRANSMITTER  
The method is for estimating the fading coefficients of a plurality of transmission channels on which signals to be sent, generated as a function of a sequence of symbols, are transmitted...
US20090262863 AMPLITUDE CONTROL CIRCUIT, POLAR MODULATION TRANSMISSION CIRCUIT AND POLAR MODULATION METHOD  
The amplitude control circuit of the present invention can reduce output noise and suppress a decrease in reception sensitivity. An amplitude control section (120), which is an amplitude control...
US20110150133 BITS-TO-SYMBOL MAPPING METHOD FOR 4+12+16 APSK MODULATION  
Disclosed is a bits-to-symbol mapping method of 4+12+16 amplitude phase shift keying (APSK) having excellent performance against the non-linearity of a high power amplifier. According to the...
US20070189417 PRECISE DELAY ALIGNMENT BETWEEN AMPLITUDE AND PHASE/FREQUENCY MODULATION PATHS IN A DIGITAL POLAR TRANSMITTER  
A novel apparatus for and method of delay alignment between amplitude and phase/frequency modulation paths in a digital polar transmitter. The invention provides a fully digital delay alignment...
US20090316827 AMPLITUDE SUPPRESSING APPARATUS AND SIGNAL TRANSMITTING APPARATUS  
An amplitude suppressing apparatus includes a differential circuit that calculates a differential value of amplitude of an input signal at a point when the amplitude reaches a predetermined...
US20090147762 TRANSMITTER AND DATA TRANSMISSION METHOD  
A method and apparatus for data transmission are provided. Data values of a plurality of channels are transformed into a transmission signal. An enhanced shaping filter is provided to shape a...
US20130336423 Transmitter Utilizing a Leaky Wave Antenna  
Methods and systems for a sub-harmonic transmitter utilizing a leaky wave antenna are disclosed and may include transmitting wireless signals at a harmonic frequency of a source signal utilizing...
US20080137773 Method and System for Enhancing Efficiency by Modulating Power Amplifier Gain  
Aspects of a method and system for enhancing efficiency by modulating power amplifier (PA) gain are presented. Aspects of the system may comprise a PA gain modulator that enables modification of...
US20080031382 Low Distortion Radio Frequency (RF) Limiter  
A limiter for minimizing an amount of phase change caused by input amplitude variation includes a variable gain amplifier configured to receive a signal having an amplitude component and a phase...
US20080253479 SINGLE AND MULTIPLE SINEWAVE MODULATION AND DEMODULATION TECHNIQUES, APPARATUS, AND COMMUNICATIONS SYSTEMS  
A method for transmitting digital data from a substantially sinusoidal waveform containing encoded digital data having one of a first and second value at selected phase angles θn comprises...
US20070189431 DELAY ALIGNMENT IN A CLOSED LOOP TWO-POINT MODULATION ALL DIGITAL PHASE LOCKED LOOP  
A novel apparatus for and method of delay alignment in a closed loop two-point modulation all digital phase locked loop (ADPLL). The invention provides a fully digital delay alignment mechanism...

Matches 1 - 50 out of 145 1 2 3 >