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US20140341321 TRANSMITTER AND TRANSMISSION METHOD THEREOF  
A transmitter and a transmitting method thereof are provided. The transmitter is configured to generate a first symbol sequence which includes a plurality of first symbols in which adjacent...
US20070223624 Transmitter with continuous phase and amplitude processing  
A transmitter includes a conversion module, a modulation parameter module, first and second up-conversion modules, a combining module, and a power amplifier circuit. The conversion module is...
US20070230617 Apparatus method for monitoring the I-Q phase bias in an I-Q quadrature modulation transmitter  
An apparatus and a method for a I-Q quadrature modulation transmitter monitor a phase bias between an I branch and a Q branch of the I-Q quadrature modulation transmitter. The I-Q quadrature...
US20090022243 METHOD FOR DATA TRANSMISSION, TRANSMITTER STATION AND COMMUNICATION SYSTEM  
The present invention is related to a method for data transmission between a transmitter station and a receiver station of a communication system, especially a wireless communication system,...
US20090220024 FM Simulcast Broadcast Signal Broadcast Transmission System and Receiver Device  
The invention relates to a FM simulcast broadcast signal, in which an analogue and digital signal are combined for a transmission in a transmission channel with limited bandwidth as a total signal...
US20080151974 Digital compensation for nonlinearities in a polar transmitter  
A polar transmitter includes a digital processor coupled to receive a complex modulated digital signal and a feedback signal produced from the complex modulated digital signal and that is operable...
US20150117569 Phase rotation for preambles within multiple user, multiple access, and/or MIMO wireless communications  
Phase rotation for preambles within multiple user, multiple access, and/or MIMO wireless communications. An appropriately designed phase rotation vector and/or appropriately designed cyclic shift...
US20150180691 PHASE DETECTOR  
Described are a method for generating a metric that is a function of a phase difference between a modulated carrier and a local carrier, and a phase detector for performing such a method. A...
US20130223566 PHASE DETECTOR  
Described are a method for generating a metric that is a function of a phase difference between a modulated carrier and a local carrier, and a phase detector for performing such a method. A...
US20070223625 Programmable hybrid transmitter  
A programmable hybrid transmitter includes a baseband processing module, an up-conversion module, and a power amplifier circuit. The baseband processing module is coupled to convert outbound data...
US20070211824 Digital quadrature modulation circuit provided with D/A converter and digital communication apparatus  
A digital quadrature modulation circuit includes a quadrature modulator, a D/A converter, and a frequency converter. The quadrature modulator orthogonally modulates local oscillation signals +cos...
US20080260070 Method for Transmitting a Digital Signal, Method for Receiving a Digital Signal, Transmitter and Receiver  
A transmitter (106) for transmitting a signal, the signal comprising a plurality of signal values, the signal values being grouped to at least one signal value block. The transmitter comprises a...
US20090310711 Transmitter and receiver capable of reducing in-phase/quadrature-phase (I/Q) mismatch and an adjusting method thereof  
An adjusting method for reducing in-phase/quadrature-phase (I/Q) mismatch in a transmitter includes the steps of: a) receiving a first in-phase signal and a first quadrature-phase signal; b)...
US20110122970 DUAL PRUPOSE MODULATOR  
The present invention provides a single modulator capable of transmitting an input according to a first and a second modulation technique. The first modulation technique represents changes in the...
US20070223623 Hybrid radio frequency transmitter  
A hybrid transmitter includes first and second up-conversion modules, a combining module, and a power amplifier circuit. The first up-conversion module is operably coupled to generate a first...
US20100074367 ADAPTIVE COMBINER ERROR CALIBRATION ALGORITHMS IN ALL-DIGITAL OUTPHASING TRANSMITTER  
Systems and methods may include a signal component separator that receives a non-constant envelope input signal and at least one phase offset value, and generates first digital phase data and...
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...
US20080056407 Method, device, computer program product and apparatus providing a multi-dimensional CPM waveform  
A method is described for generating a M-D CPM waveform as a constant envelope, continuous phase signal capable of conveying a plurality of information symbols per symbol interval. Additionally,...
US20070092021 QUADRATURE MODULATOR AND VECTOR CORRECTION METHOD  
A quadrature modulator for generating a transmission signal includes an orthogonal signal generator configured to generate a first local signal and a second local signal orthogonal to the first...
US20100020902 TERMINATION TECHNIQUES FOR MULTI-INDEX CONTINUOUS PHASE ENCODERS FOR WIRELESS NETWORKS  
Various example embodiments are disclosed herein. According to an example embodiment, an apparatus may include a multiple modulation index continuous phase encoder (CPE) configured to perform...
US20120300879 High Bandwidth Modulation and Transmission  
This disclosure relates systems and methods for a high bandwidth modulation and transmission of communication signals.
US20090041157 Medium loss high power IBOC combiner  
A method and apparatus are disclosed for combining digital sidebands with an FM analog signal for IBOC transmission by a single antenna. Specifically, a high power filter combiner for combining an...
US20050008097 Coded modulation scheme for a wirelesss communication system and methods thereof  
A wireless communication system (10), an encoding method (300) for encoding a binary input signal and a decoding method (800) for decoding a coded baseband signal within the wireless communication...
US20070140378 Quadrature modulation apparatus, method, program, and recording medium  
An RF signal, which has been obtained by a quadrature modulation, is corrected without performing quadrature demodulation. There are included an in-phase multiplier, a quadrature multiplier, an...
US20100183093 All-Digital Multi-Standard Transmitters 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...
US20080037686 WIRELESS TRANSMISSION METHOD USING OFDM AND TRANSMITTER AND RECEIVER THEREOF  
A wireless transmitter includes an allocation unit allocating first modulation symbols to first subcarriers arranged in N subcarriers cycles, modulators performing OFDM modulation on the first...
US20080225984 Digital Polar Transmitter  
A digital polar transmitter includes a baseband processor configured to receive an input signal and to convert the input signal into a baseband amplitude component and a baseband phase component....
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...
US20080205550 Method and System for Using a Phase Locked Loop for Upconversion in a Wideband Polar Transmitter  
Certain aspects of a method and system for using a phase locked loop (PLL) as a filter in a wideband polar transmitter may be disclosed. Aspects of the method may include polar modulating a signal...
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...
US20100067603 Radio Communication Systems And Transmitting Method  
A radio transmitter includes a signal generating unit that generates first and second OFDM (Orthogonal Frequency-Division Multiplexing) signals carrying the same information, and a phase shifter...
US20090323861 System and Method for Blind Compensation and Correction of Transmitter IQ Imbalance at the Receiver  
Systems and methods of correcting for a transmitter IQ imbalance are disclosed. Various embodiments collect statistics related to a received packet on a transceiver. These statistics include one...
US20080095269 Method and System for Digital Tracking in Direct and Polar Modulation  
Aspects of a method and system for digital tracking in direct and polar modulation are presented. Aspects of the system may include at least one circuit within a phase locked loop (PLL) circuit...
US20080192811 BEAMFORMING METHODS AND APPARATUS  
A method of beamforming comprising: transmitting a plurality of signals from a transmitter, each signal being transmitted over a plurality of subcarriers, each subcarrier having a weight factor...
US20110129008 Methods, Apparatuses, System and Related Computer Program Product for Cell Type Detection  
It is disclosed a method comprising including transmitting indication information indicating network cells of a first type different from network cells of a second type, the transmitting...
US20110274216 CONTINUOUS PHASE MODULATION FOR SATELLITE COMMUNICATIONS  
A new coded continuous phase modulation (CPM) scheme is proposed to enhance physical layer performance of the current DVB-RCS standard for a satellite communication system. The proposed CPM scheme...
US20130336424 Signal Transmitting Device and Phase Modulated Method for Transmitting via a Signal Transmitting Device  
A signal transmitting device and a method for transmitting via a signal transmitting device is disclosed. In one embodiment the transmitting device comprises a first resonant circuit with a...
US20090310710 Crest factor reduction with phase optimization  
A system for reducing peaks comprises a processor and a memory. The processor is configured to determine a phase offset for each of a plurality of input signals. The phase offset for each of the...
US20050276350 Signal processing architecture for modulation and interpolation  
A system and method for oversampling and modulating a digital data stream. A programmable quadrature interpolating filter is provided which allows the passband of the output signal to be selected...
US20090245422 METHOD AND SYSTEM FOR TRANSMIT UPSAMPLING VIA IFFT  
A technique for eliminating from or reducing the complexity of an upsampler/interpolator of a transmit system. In general, the technique involves configuring an IFFT to perform both the conversion...
US20090219973 Pulse modulation and demodulation in a multiband uwb communication system  
In a wireless communications system, such as a multiband Ultra Wideband communications system, data is transmitted by means of the phases of pulses in multiple frequency bands. A signal is...
US20080049866 METHOD OF CORRECTING GAIN AND PHASE IMBALANCE OF A MULTI-CARRIER TRANSMISSION SIGNAL, TRANSMITTER AND BASE STATION  
Method of correcting a gain and phase imbalance of an analogue modulator (32) for multiple channels (CHi) of a multi-carrier transmission signal, the method comprising the steps of determining a...
US20100074369 OFDM TRANSMITTER AND OFDM RECEIVER  
An OFDM transmitter and receiver realizing high-speed cell search and having a reducible circuit scale. A base station device (100) serving as an OFDM transmitter comprises an SCH inserting...
US20130301754 FREQUENCY MODULATOR HAVING DIGITALLY-CONTROLLED OSCILLATOR ARRANGED FOR RECEIVING MODULATION TUNING WORD AND PHASE-LOCKED LOOP TUNING WORD AND/OR RECEIVING FRACTIONAL TUNING WORD OBTAINED THROUGH ASYNCHRONOUS SAMPLING AND INTEGER TUNING WORD  
A frequency modulator includes a digitally-controlled oscillator (DCO) arranged for producing a frequency deviation in response to a modulation tuning word and a phase-locked loop (PLL) tuning...
US20100014611 METHOD FOR DECIDING POSITION OF MAPPING SYMBOLS, AND DEVICE AND METHOD FOR MODULATING BINARY SIGNAL  
Disclosed is a binary signal modulator for minimizing deterioration of receiving performance caused by phase error. The binary signal modulator receives binary signals, and converts the binary...
US20050117661 Soft method for variably changing a modulation method according to cell coverage range in a broadband wireless access communication system  
A soft method for variably changing a modulation method in a broadband wireless access communication system. By softly applying and changing the modulation method according to a receiving error...
US20090207941 Delay-Based Modulation of RF Communications Signals  
An apparatus for providing an angle modulated signal includes a tunable oscillator circuit, a variable time delay circuit, and an optional scaling and delay control apparatus. The tunable...
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...
US20050129142 Filter for a modulator and methods thereof  
In some exemplary embodiments of the invention, a transfer function of a filter for a fractional-N sigma-delta modulator may be calculated to be optimized according to predefined optimization...
US20120155573 Phase Shifting Circuitry  
Phase shifting circuitry is provided for phase shifting at least one of first and second quadrature components of a data signal. The circuitry includes a first phase shifter adapted to phase...

Matches 1 - 50 out of 140 1 2 3 >