Matches 1 - 50 out of 203 1 2 3 4 5 >


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8170627 Wireless communications system having reduced noise mode operation capability  
A wireless communication system having a terminal unit operates in a reduced noise state during receipt of a wireless transmission from a control unit. The terminal unit includes terminal...
8145147 Power amplifier edge evaluation-alternative envelope modulator  
A modulator includes a power driver, a power amplifier, and a heterojunction bipolar transistor (HBT) type device. The power driver is for receiving an amplitude modulation signal and for providing...
8139557 Wireless base station apparatus and system to avoid preamble interference  
A radio base-station apparatus with improved frame transmission efficiency by avoiding interference of preambles and frame control information between sectors of a cell or between cells with a...
8140030 Adaptive impedance converter adaptively controls load impedance  
A transmitter generates first and second constant-envelope radio frequency (RF) component signals having first and second phase angles. The first and second phases are controlled by a phase...
8131230 Method and system for FM transmitter coexistence  
A system and method for operating an FM system and wireless networking system coexistent in a mobile wireless device. A mobile wireless device includes a frequency modulation (“FM”) system that inc...
8098758 Digital baseband transmitter with digital RF/IF support in GSM/GPRS/EDGE compliant handsets  
Certain aspects of a digital baseband transmitter with digital RF/IF support in GSM/GPRS/EDGE compliant devices may comprise receiving digitized data within a chip. A control signal may be...
8095087 Polar modulation with coarse and fine FM signals  
Apparatus and methods for enhancement of performance in polar modulators are described. In one implementation, an FM signal component is divided into a coarse FM signal and a residue FM signal to...
8090036 Transmitter and carrier leak detection method  
A carrier leak compensating device (2) for adding compensation values to a received transmission signal, an analog quadrature modulator (4), a feedback device (5-7) for receiving and...
8081936 Method for tuning a digital compensation filter within a transmitter, and associated digital compensation filter and associated calibration circuit  
A method for tuning a digital compensation filter within a transmitter includes: obtaining at least one loop gain calibration result by performing loop gain calibration based upon signals of at...
8054042 Modular power supply  
A modular power supply that can be adapted to receive and charge practically any type or number of portable electronic devices includes a power converter that receives an AC wall voltage and...
8018914 Radio communication device, demodulation method, and frequency deflection correction circuit  
A demodulation section 13 receives a TDMA-TDD based phase-modulated burst signal of mobile communications and demodulates the burst signal by a synchronous detection system (or a quasi-synchronous...
8019290 Two-step channel selection for wireless transmitter front-ends  
A reconfigurable multimode transmitter is disclosed, operating in accordance with a two-step channel selection. The first step provides for a fine channel selection and upconversion of a desired...
7979038 PLL modulation circuit, radio transmission device, and radio communication device  
Provided are a PLL modulation circuit, a radio transmission device, and a radio communication device capable of maintaining a modulation accuracy for modulation of a wide band. The PLL modulation...
7920658 Efficient method to compute one shot frequency estimate  
Systems and methods are provided for efficiently determining frequency estimates in a forward link only wireless receiver. In one embodiment, a method is provided to compute a one shot frequency...
7920527 Real-time/non-real-time/RF IC and applications thereof  
A real-time/non-real-time/RF IC includes first and second baseband processing modules, an RF section, a wireline interface, and a bus structure. The first baseband processing module converts...
7865177 Method and system for down-converting an electromagnetic signal, and transforms for same, and aperture relationships  
Methods, systems, and apparatuses, and combinations and sub-combinations thereof, for down-converting an electromagnetic (EM) signal are described herein. Briefly stated, in embodiments the...
7826817 Applications of universal frequency translation  
Frequency translation and applications of same are described herein. Such applications include, but are not limited to, frequency down-conversion, frequency up-conversion, enhanced signal...
7792497 Method and apparatus for frequency synthesizing  
A method and an apparatus for frequency synthesizing are provided for a wireless communication system. In a frequency synthesizer, a phase lock loop (PLL) circuit generates a first elemental...
7742784 Wireless communication system, a wireless communication apparatus, a wireless communication method, and a computer program  
A wireless communication system of the invention comprises a plurality of communication stations decentralized-autonomously construct a network without having a relation between a control station...
7741928 Frequency modulation using a digital frequency locked loop  
Circuits and methods for frequency modulation (FM) using a digital frequency-locked loop (DFLL). A digitally controlled oscillator (DCO) generates and adjusts a frequency of a modulated signal...
7715809 EDGE modulator  
Circuits and methods for modulators that receive symbols, and provide I (incident, or in-phase) and Q (quadrature) component values from a look-up table for subsequent filtering and...
7706836 Method and system for a radio data system (RDS) demodulator for a single chip integrated bluetooth and frequency modulation (FM) transceiver and baseband processor  
Aspects of a method and system for a radio data service (RDS) demodulator for a single chip integrated Bluetooth and frequency modulation (FM) transceiver and baseband processor are presented....
7649428 Method and system for generating noise in a frequency synthesizer  
A method and system for generating noise in a frequency synthesizer are provided. The method includes generating a noise portion of an input signal within the frequency synthesizer and appending...
7587179 Direct synthesis transmitter  
A direct synthesis transmitter. A very efficient and highly linear direct synthesis transmitter is provided that can be used to directly synthesize and transmit any type of modulated signal. The...
7450902 Continuous phase frequency shift keying modulation during wireless transmissions in a closed system while minimizing power consumption  
Continuous phase frequency shift keying modulation is employed during wireless transmission from an internal device to an external device to increase robustness of transmissions. The continuous...
7447483 Radio apparatus and a method for reducing interference in a radio apparatus  
The invention relates to a method and an arrangement for reducing interference in a radio apparatus. The solution comprises a clock signal generator, an analog part and a controller arranged to...
7409189 Calibration and testing architecture for receivers  
A method and apparatus are provided to generate calibration signals to multiple stages in a receiver channel. The multiple stages are calibrated using multiple calibration circuits, where a...
7394880 Method and apparatus for simulating radio channel  
A radio channel simulator configured to read radio channel data describing a radio channel and user data including at least one user signal, and to simulate the radio channel using a FIR filter...
7378918 Two-point modulation type phase modulation apparatus, polar modulation transmission apparatus, wireless transmission apparatus and wireless communication apparatus  
There provides a two-point modulation phase modulation apparatus capable of obtaining an RF phase modulation signal of superior modulation precision with low power consumption and a simple...
7363013 Phase lock loop applying in wireless communication system and method thereof  
A phase lock loop receives a baseband signal which has an input frequency, and modulating the baseband signal to be a corresponding RF signal which has a predetermined transmission frequency for...
7324795 Method of controlling phase locked loop in mobile station, and mobile station  
A method of controlling a phase locked loop in a mobile station and a mobile station of a cellular telecommunications system are provided. The mobile station comprises an integrated phase locked...
7302235 Synchroniser  
A synchroniser for use in a receiver which receives signals, wherein the synchronizer provides a digital control signal, the control signal defining a plurality of different levels; controls the...
7295819 Signal sample acquisition techniques  
A sample acquisition apparatus for sampling first and second signals within a signal processing arrangement, includes a sampler for capturing sections of the waveforms of both the first and second...
7184720 Method and device for simulating radio channel  
The invention relates to a method and device for performing channel simulation, the device comprising a set of channel simulation units (200 to 214) for simulating a radio channel, each unit...
7181187 RF transmitter having improved out of band attenuation  
A radio frequency transmitter includes a digital baseband and coding module, an inverse fast Fourier transform (IFFT) module, a complex digital filter, a complex digital-to-analog converter and a...
7177361 Modulator for electromagnetic signals transmitted by a contactless transmission/reception system  
A data transmission device using electromagnetic wave radiation in a contactless transceiver system toward a contactless object, the data bits transmitted corresponding to the half cycle of an...
7174139 Delay control in a digital radio transmitter system  
A relative delay between analog R.F. output signals of a plurality of digital radio transmitters in a digital radio transmitter system is controlled. At least one interface receives delay...
7123666 Gaussian minimum shift key transmitter with feedforward phase compensation  
A method and apparatus for generating a burst FSK signal having precisely shaped transitions between modulation states. The apparatus uses feedforward compensation of phase gain and phase...
7123665 Method and apparatus for measuring phase error of a modulated signal  
A method and apparatus for generating a burst FSK signal having precisely shaped transitions between modulation states. The apparatus uses feedforward compensation of phase gain and phase...
7120390 BLUETOOTH smart offset compensation  
An offset history table is implemented and maintained in a BLUETOOTH device and is used to pre-seed an expected frequency offset of a received signal from another BLUETOOTH device. The disclosed...
7054606 Digitally calibrated narrowband filter with analog channel compensation  
An apparatus comprising a first circuit, a second circuit and a third circuit. The first circuit may be configured to filter an analog input signal in an analog domain in response to one or more...
7031672 Direct conversion transmitter system and method with quadrature balancing and low LO feed through  
A system and method are provided for communicating a radio frequency (RF) signal. In use, a baseband signal is mixed with a plurality of oscillator signals with different phases in an interleaving...
7003273 Temperature compensating circuit, electronic apparatus and radio unit having temperature compensating function  
A temperature compensating circuit is provided in a radio unit, an ambient temperature is detected by a temperature sensor of the temperature compensating circuit, the detected temperature value is...
7003270 Electronic apparatus having radio transmitter  
An electronic apparatus comprising a radio transmitter is disclosed. In a computer system (1) having a radio transmission circuit (3) of a phase modulation type supplied with power from a power...
6983131 Circuit configuration for direct modulation  
A circuit configuration for direction modulation contains an oscillator, whose output signal is split into quadrature components for modulation with a useful signal. A frequency shifting circuit...
6933798 Trimming method and trimming device for a PLL circuit for two-point modulation  
In the case of a trimming method for a PLL circuit operating based on the principle of a two-point modulation, the PLL circuit is locked without any modulation being impressed and then an analog...
6915117 Multistage modulation architecture and method in a radio  
In a multiple stage transmitter, and analog signal is modulated and mixed to produce a radio frequency output. A separate mixing frequency signal is provided to each stage. A single frequency...
6882851 Ad-hoc control protocol governing use of an unlicensed or shared radio frequency band  
Systems and methods to enable different types of radio communication devices to communicate using a common language in order to enable the devices to regulate their use of the spectrum. Each device...
6873831 Method and apparatus for transmit power modulation in a wireless communications system  
An apparatus according to one embodiment of the invention includes a transmitter. The transmitter receives an RF signal and produces at least two modulated signals based on the RF signal. Each of...
6868135 Method and apparatus for correcting for a phase shift between a transmitter and a receiver  
A method and apparatus for correcting for a phase shift between a transmitter and receiver comprising the steps of: a) transmitting a signal from a transmitter (14);b) receiving the transmitted...
Matches 1 - 50 out of 203 1 2 3 4 5 >