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9020026 Frequency dependent I/Q imbalance compensation  
A method and system for compensating for frequency dependent phase and amplitude imbalances is provided. A plurality of frequency sub-bands is extracted from a received wideband signal. Each of...
9020073 Low intermediate frequency receiver  
One embodiment relates to a low intermediate frequency (IF) receiver. The low-IF receiver includes an analog front end that is configured to receive a modulated IQ data signal and provide an...
9014653 High-IF superheterodyne receiver incorporating high-Q complex band pass filter  
A novel and useful reconfigurable superheterodyne receiver that employs a 3rd order complex IQ charge-sharing band-pass filter (BPF) for image rejection and 1st order feedback based RF BPF for...
8977519 Spectrum analyzer using multiple intermediate frequencies and multiple clock configurations for residual, spurious and image signal reduction  
A spectrum analyzer for measuring an RF signal over a selected frequency span configured to use multiple Intermediate Frequencies (IFs) for residual, spurious and image signal reduction. The...
8942656 Reduction of second order distortion in real time  
In a radio receiver, a method of reducing second order distortion components, involves at a first mixer, mixing an input signal with an oscillator signal to generate an I component of a received...
8929845 Instrument LO used as alignment signal source  
A system can include an input signal source, a local oscillator (LO), and an intermediate frequency (IF) receiver to receive an input signal from the input signal source and an LO signal from the...
8909166 Method and apparatus for controlling multi band antenna in mobile communication terminal  
An apparatus and method for controlling a multi-band antenna in a mobile communication terminal are provided. An apparatus for controlling a multi-band antenna in a mobile communication terminal...
8848847 Sampling receiver with inherent mixer functionality  
One embodiment of the present invention relates to a combined mixer filter circuit. The circuit includes a sampler, a plurality of filter branches, and a coefficient generator. The sampler is...
8849232 Methods of receiving and receivers  
A receiver uses a local oscillator to receive data transmitted via a combination of radio frequency signals using carrier aggregation. Each radio frequency signal occupies a respective radio...
8836555 Circuit, sensor circuit, and semiconductor device using the sensor circuit  
A sensor circuit for obtaining physical quantities with a small margin of error even when the temperature varies is provided. The sensor circuit includes a sensor, a sampling circuit for obtaining...
8831549 Receiver circuit and associated method  
A receiver circuit, e.g., a low-IF receiver, including two mixing paths. The two mixing paths scale an input signal respectively by two mixing gains and shift phase of the input signal...
8831143 DC offset cancellation in direct conversion receivers  
A method for DC offset cancellation includes defining, in a range of possible gain values for operating a direct conversion receiver, multiple sub-ranges of the possible gain values. Multiple DC...
8768277 Automatic gain control of a receiver circuit  
The present invention relates to a receiver circuit for processing of electrical signals, and comprising: an antenna (12),at least one amplifier (14) coupled to the output of the antenna (12),an...
8750441 Signal cancellation to reduce phase noise, period jitter, and other contamination in local oscillator, frequency timing, or other timing generators or signal sources  
A method includes obtaining an input signal and demodulating phase contamination in the input signal to generate a baseband signal. The method also includes modulating the input signal based on...
8724679 Method and apparatus of transceiver calibration using substrate coupling  
Transceiver calibration is a critical issue for proper transceiver operation. The transceiver comprises at least one RF transmit chain and one RF receive chain. A closed loop path is formed from...
8706071 Reconfigurable wideband receiver  
One embodiment of the present invention provides a receiver for wireless communication. The receiver includes a demodulator and at least one filtering mechanism coupled to the demodulator, and an...
8670740 Direct digital conversion tuner  
A direct sampling tuner includes a low noise amplifier and an optional dynamically configurable band pass filter coupled to the low noise amplifier. The optional filter is configured to pass a...
8638883 DC offset cancellation in direct conversion receivers  
A method includes receiving a signal using a direct conversion receiver, while the receiver is set at a gain that is selected from a range of possible gain values. Multiple DC offset correction...
8634450 Adaptive error correcting code for data communications over a plastic optical fibre  
An efficient coding and modulation system for transmission of digital data over plastic optical fibers is disclosed. The digital signal is coded by a three-level coset coding. The spectral...
8620253 Apparatus and method for compensating for DC-offset in direct conversion receiver of wireless communications system  
An apparatus and method of compensating for a direct voltage offset in a direct conversion receiver of a wireless communications system is provided. The apparatus includes a voltage control...
8620254 Wireless communication device and system  
The present invention is directed to a wireless communications device that includes an antenna configured to receive an RF signal from an ambient environment. The antenna is characterized by an...
8619895 Apparatus and method for transmitting/receiving broadcast data in digital broadcasting system  
Disclosed are a method and an apparatus for transmitting and receiving broadcast data in a digital broadcasting system. The method for transmitting and receiving broadcast data in a digital...
8606215 Methods and systems for interference rejection for low signals  
A radio device and a method to operate a non-heterodyne receiver are provided. The radio device is configured to receive a signal waveform and to provide a wake-up signal to a second communication...
8605836 Automatic gain control for a wireless receiver  
Techniques for performing automatic gain control (AGC) at a wireless receiver are described. The total gain for the wireless receiver is achieved with discrete gain steps for analog circuitry and...
8605822 Apparatus and method for transmitting and receiving data  
A data transmitting apparatus performs symbol mapping on each of first and second input data to generate a plurality of first and second modulation data symbols, performs inverse fast Fourier...
8571152 Power-saving apparatus used for wireless communication receiver and system, and method using the same  
The present invention discloses an apparatus and method for power-saving switch on a pair of configurable analog-to-digital converters. The apparatus mainly comprises an antenna, an antenna...
8525937 Apparatus and method for calibrating audio-visual signal  
An apparatus for calibrating an audio-visual (AV) signal includes a controller for generating a control signal, a controllable filter for selectively filtering the AV signal in response to the...
8509358 Viterbi equalization with detection of the nearest constellation points for stage reduction  
The device is used for decoding convolution-encoded reception symbols. In this context, transmission data are modulated with a modulation scheme to form symbols, which are encoded with a...
8483644 Electronic component allowing the decoding of a radiofrequency transmission channel conveying coded digital information, in particular for satellite digital telebroadcasting  
The component, fully integrated onto a monolithic substrate, includes a tuner, a demodulator, and a channel decoder. The overall filtering is carried out in two parts, a baseband analog filtering...
8478220 Discrete time polyphase mixer  
Embodiments of a radio frequency (RF) circuit provide translational filtering in accordance with an input impedance response that is an impedance image of a reactive circuit impedance response...
8478222 I/Q calibration for walking-IF architectures  
Systems and methodologies are described that facilitate calibration techniques for a station in a wireless communication system that can be utilized to provide joint estimates for distortion...
8463217 Multiple band multiple input multiple output transceiver integrated circuit  
A MIMO transceiver integrated circuit (IC) includes a plurality of multiple band direct conversion transmitter sections, a plurality of multiple band direct conversion receiver sections, and a...
8463211 RF signal receiving apparatus  
An RF signal receiving apparatus includes a first poly-phase filter, a second poly-phase filter, a first frequency-mixer module, a switch and a low-pass filter module. The first poly-phase filter...
8463227 Receiver for amplitude-modulated signals  
In a receiver, a synchronization circuit (MIX2, C1, R1, VCO) provides a set of oscillator signals (OSI, OSQ, OSX, OSY) that are synchronized with a carrier of an amplitude-modulated signal. The...
8442171 Digital correction of analog polyphase filters  
Embodiments of the present invention provide systems, devices and methods for modeling and correcting amplitude and quadrature phase errors generated within analog components of a receiver. A...
8433276 Sampling circuit and receiver  
A sampling circuit and a receiver with which filter characteristics compatible with the reception of wideband signals can be realized with a high degree of freedom in the setting of the filter...
8433277 Passive mixer and four-phase clocking method and apparatus  
According to one embodiment, a radio frequency receiver comprises a quadrature mixer configured to convert radio frequency signals to baseband signals or intermediate frequency signals. The...
8428532 High-frequency receiver with multiple-channel digital processing  
In the receive subsystem, the analogue-to-digital converter (40) works on the output of the low-noise amplifier (33), at a chosen rate (F), which corresponds to a bandwidth sampling. The...
8422596 Communication device, communication method, and program  
A communication device includes: demodulating means for demodulating a transmission signal from another communication device that performs noncontact communication; calculating means for...
8369820 Frequency multiplier device  
A frequency multiplier device comprises a first signal combiner having a first port for receiving a first input signal having a first frequency f1 and a second port for receiving a second input...
8364106 Multiple band direct conversion radio frequency transceiver integrated circuit  
A multiple band direct conversion radio frequency (RF) transceiver integrated circuit (IC) includes a multiple band direct conversion transmitter section, a multiple band direct conversion...
8259858 Carrier detect system, apparatus and method thereof  
A method of detecting an on-channel signal and synchronizing signal detection with correcting for DC offset errors in a direct conversion receiver is presented. A received signal is digitized, and...
8224280 Radio frequency receiver, wireless communication unit and method of operation  
A wireless communication unit (200) comprises a radio frequency (RF) receiver for receiving an RF signal and providing the received RF signal to an off-channel signal detector (218) and a...
8218687 Frequency dependent I/Q imbalance estimation  
A receiver estimates I/Q imbalance in I and Q input signals using circuitry to separate different frequency components of the I and Q input signals, and estimation circuitry arranged to estimate...
8195115 Receiver architectures for digital radio broadcasts and associated methods  
Receiver architectures and related methods are disclosed for high definition (HD) and digital radio FM broadcast receivers. The radio receiver architectures are configured to utilize multiple...
8194718 Receiving apparatus and signal processing method  
In the reception and demodulation of a communication signal with frequency hopping among a plurality of frequency bands, a demodulator is formed by a balance circuit. The demodulator performs...
8180312 Receiver architecture for minimizing use of external bandpass filter between low-noise amplifier and first mixer  
A wireless receiver is provided that includes a multi-step gain-control low-noise amplifier (LNA) stage and a mixer stage. The LNA stage is operable to amplify at least one input signal to...
8170565 Method and apparatus of domain selection for routing control  
A method of domain selection for routing control, applied to a communication system including a Circuit Switched (CS) network and an IP Multimedia Subsystem (IMS) includes: obtaining call...
8170504 Modified preamble for programmable transmitter  
A programmable transmitter generates a frame preamble to train a receiver with respect to a communication link format that corresponds to a transmission mode wherein the transmission mode may...
8170153 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...

Matches 1 - 50 out of 400 1 2 3 4 5 6 7 8 >