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Telecommunications > Receiver Or Analog Modulated Signal Frequency Converter > Noise Or Interference Elimination Noise Or Interference EliminationNoise Or Interference Elimination 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.03/01/07 - 20070049230 - Handheld audio system with radio receiver and method for use therewith A radio receiver, optionally used in conjunction with a handheld audio system, includes a radio stage for processing a received radio signal into an audio signal. An audio stage produces an audio output, based on the audio signal. An overload monitor detects an overload condition in the radio stage and ... 02/01/07 - 20070026833 - Method, apparatus and computer program product providing widely linear interference cancellation for multi-carrier systems A method is provided. The method includes: receiving a multi-carrier signal that includes a plurality of subcarriers; and performing widely linear (WL) processing on the received signal. ... 01/11/07 - 20070010226 - Wireless terminal methods and apparatus for dc tone special treatment Special DC tone treatment in a wireless communications system, e.g., an OFDM system, is discussed. In the downlink, a wireless terminal receiver introduces self-interference at the DC tone from the RF/baseband conversion. A base station every so often does not transmit on the downlink DC tone while continuing to transmit ... 11/16/06 - 20060258317 - Dc offset calibration system A DC offset calibration system includes: a mixer 1 for direct conversion; a detector 2 that detects a level of an RF input signal; a controller 4 that generates a compensation signal for compensating for a dynamic DC offset based on an output from the detector; a comparator 9 that ... 11/16/06 - 20060258316 - Receiver having a signal reconstructing section for noise reduction, system and method thereof A signal reconstructing section (50), a receiver having the signal reconstructing section (50), a communication system having the receiver, and a method for reducing noise in a transformed signal having a plurality of signal components and using the signal reconstructing section (50) are described. The signal reconstructing section (50) of ... 11/09/06 - 20060252398 - Receiver of rfid reader for eliminating leakage signal Provided is a receiver of a passive radio frequency identification (RFID) reader, which eliminates a leakage signal from a reception signal comprised of a RFID tag response signal and the leakage signal. The receiver includes a phase adjustment unit adjusting a local oscillation signal received from a frequency synthesizer to ... 10/26/06 - 20060240795 - Noise whitening A method of noise whitening a received signal comprises estimating (201) the noise of a channel; calculating (202) the power spectrum of the channel; adding (203) the estimated noise and the calculated power spectrum to build (204) a positive definite band matrix; applying (205) symmetric factorisation to the matrix; deriving ... 10/12/06 - 20060229051 - Interference selection and cancellation for cdma communications Interference cancellation for CDMA handsets comprises projecting a received signal onto a subspace that is substantially orthogonal to an interference subspace. Selection of the interference subspace includes extracting at least one interfering signal from the received signal. Interference selection may include calculating a signal-power threshold from which the presence or ... 10/05/06 - 20060223479 - Separation of cochannel fm signals Multiple cochannel FM signals received, for example, in an overloaded signal environment may be separated using parallel interference cancellation techniques. ... 09/28/06 - 20060217100 - System and method for adaptive dc offset compensation in wireless transmissions A first direct current (DC) component of a first amplified representation of a received signal at an output of an amplifier set to a first gain setting is determined during a first expected idle period of a received signal. A second DC component of a second amplified representation of the ... 09/28/06 - 20060217099 - Activation signal output circuit With a capacitor C inserted in an interstage portion of multiple stages of amplifier circuits, a high pass filter is generated by the capacitor C and an input impedance |Z| of an amplifier circuit in the next stage. Accordingly, frequency components lower than a cutoff frequency fc are cut off, ... 08/17/06 - 20060183454 - Adaptive coherent rfid reader carrier cancellation Systems and methods for adaptive cancellation of carrier content includes receiving a signal, adaptively detecting an amount of carrier content in the received signal, generating a feedback signal for canceling out the carrier content in the incoming signal, and introducing the feedback signal for canceling out a majority of carrier ... 07/13/06 - 20060154637 - Method for estimating a carrier leak, an estimator and modulation system provided with automatic control of a carrier using said system calculating at least a part of the carrier leak based on the measured positions (PD1, PD2) and the applied gains (Z1, Z2), the calculated carrier leak part (offset_mod) corresponding to the leak due to the modulator. ... 06/29/06 - 20060141971 - Method and apparatus for detection and classification of impairments on an rf modulated network A method is disclosed for maintaining the integrity of a communication system. The method comprises detecting common path distortion (CPD) and periodic impulse/burst (PIB) noise in a received signal in the communication system. After isolating the CPD and PIB noise, ingress noise in the received signal is identified. Isolating the ... 06/15/06 - 20060128339 - Varactor tunable rf filters having low distortion and high signal level capability An agile frequency converter provides IF-RF level exchange and notch filtering. System noise and spurious levels generated by channel frequency conversion is reduced in applications requiring broadband combining of frequency converters to form multichannel composite signal. A pair of varactor banks is connected in an arrangement whereby varactor pairs are ... 05/25/06 - 20060111070 - Dc extracting arrangement and a filter The present invention relates to a DC extracting arrangement in a RF filter used for extracting a DC voltage and/or a low frequency signal (DC/Com. signal) superimposed on a RF signal. The DC/Com. signal is extracted using a low pass filter which is arranged inside the first resonator inside the ... 05/18/06 - 20060105731 - Circuit and method for reducing direct current biases A method is provided for reducing a DC bias in a receiver. This method includes isolating a second circuit portion from a first circuit portion (535) and determining a second DC bias correction value for the second circuit portion that will eliminate a second DC bias at the isolated second ... 05/04/06 - 20060094387 - Method and system for a second order input intercept point (iip2) correction In RF transceivers a method and system for process, voltage, and temperature (PVT) measurement and calibration are provided. A nominal DC offset current may be generated at a nominal temperature and may be based on a calibration voltage. A nominal transconductance parameter may be determined based on the nominal DC ... 05/04/06 - 20060094386 - Method and system for a second order input intercept point (iip2) calibration scheme In RF transceivers, a method and system for a second order input intercept point (IIP2) calibration scheme are provided. Transceiver calibration schemes to compensate for DC offsets produced by interfering signals may be performed during production testing or field operation. During production testing, an external source may inject a blocker ... 04/20/06 - 20060084405 - Circuitry for a receiving system with improved directivity and signal to noise ratio A receive system, including special integrated circuits, for providing enhanced directivity in the form of a narrowed receive beam and a relatively small antenna with performance comparable to a much larger antenna at similar frequencies. Received signals are converted to digital values and stored in a manner which enables subsequent ... 04/06/06 - 20060073803 - Direct conversion receiver with dc offset compensation A direct conversion receiver includes a mixer for converting an RF signal into a baseband signal, a dynamic DC offset compensator for compensating for a dynamic DC offset caused by the effect of second order nonlinear distortion of the mixer on an interfering wave that enters the input terminals of ... 02/23/06 - 20060040633 - Frequency mixer A frequency mixer is provided with a mixer circuit having an input cell that amplifies an input signal and a switching cell that mixes the amplified input signal with a switching signal and outputs a multiplied signal, and a DC offset compensator that detects the input level of the input ... 02/09/06 - 20060030287 - Adaptive noise reduction system for a wireless receiver A receiver with reduced near field noise is described. The receiver has a far range receiving section configured to sense a desired signal that includes near field noise. The receiver further includes a near range receiving section configured to sense a near field noise reference signal. An adaptive noise canceller ... 01/26/06 - 20060019627 - Adaptive correction of a received signal frequency response tilt Distortion due to transmission characteristics of a transmission medium is corrected by measuring leakage in a signal orthogonal to a received signal. The frequency response of an equalizer is adaptively adjusted until the measured leakage is at a local minimum. ... 01/05/06 - 20060003724 - System and method for reducing noise in a recording receiver An apparatus and method is related to wireless communication devices with a reduced-noise recording receiver. The recording receiver receives a transmitted signal, converts the received signal to a digital base-band signal and stores the digitized base-band signal in a buffer for subsequent processing. The stored digital signals are subsequently processed ... 11/24/05 - 20050260965 - Method and system for dc offset cancellation from a modulated signal Provided are a method and system for removing an offset direct current (DC) component from an input waveform. The method includes multiplying the input waveform with a demodulation waveform to produce a first differential current signal. An absolute value representation of the demodulation waveform is multiplied with a reference DC ... 11/10/05 - 20050250466 - Method and apparatus for improving mlse in the presence of co-channel interferer for gsm/gprs systems A method and an apparatus for improving the equalization performance of a wireless receiver in the presence of co-channel interference by selectively filtering a received signal are disclosed. In the presence of co-channel interference, the noise in the received signal comprises a white noise component and a non-white noise component. ... 10/13/05 - 20050227663 - Colored interference indentification A method and apparatus for receiving a communication signal r(t) subject to noise n(t) over a communication channel (10) is disclosed. The method comprises the steps of: receiving (100) the communication signal r(t) comprising the noise n(t), estimating (103) the amount of noise n(t) in the communication signal r(t), and ... 10/06/05 - 20050221782 - Am radio receiver An AM radio receiver comprises an RF amplifier, a first mixer that converts the RF signal to a first intermediate-frequency signal, a first bandpass filter that band-limits the first intermediate-frequency signal, a second mixer that converts the output from the first bandpass filter to a second intermediate-frequency signal, a second ... 10/06/05 - 20050221781 - Dc offset and 1/f noise compensation of a direct conversion receiver In a direct conversion receiver with zero-frequency intermediate frequency (IF) signal, the DC offset and 1/f noise of the IF signal is compensated by means of double-sampling. The first period of the doubling-sampling is a calibration phase, which stores the DC offset and the 1/f noise. The second period is ... 09/22/05 - 20050208920 - Current driven polyphase filters and method of operation A filter circuit includes a polyphase filter coupled to a first circuit component and a second circuit component. The first circuit component propagates four input current signals to the polyphase filter. The third and fourth input current signals are substantially one-hundred-eighty degrees out of phase with the first and second ... 09/22/05 - 20050208919 - Serial bus interface for direct conversion receiver A direct downconversion receiver architecture having a DC loop to remove DC offset from the signal components, a digital variable gain amplifier (DVGA) to provide a range of gains, an automatic gain control (AGC) loop to provide gain control for the DVGA and RF/analog circuitry, and a serial bus interface ... 09/22/05 - 20050208918 - Multi-channel filtering system for transceiver architectures A multi-channel filtering system for use with a transceiver includes a front-end multi-pole, multi-throw switch, a back-end multi-pole, multi-throw switch, and a plurality of filters. The front-end switch includes a receive pole, a transmit pole, and a plurality of switch throws. The back-end switch also includes a receive pole, a ... 09/22/05 - 20050208917 - Radio front end and applications thereof A radio front end includes a transformer and an adjustable load. The transformer includes a first winding and a second winding, wherein the first winding is operably coupled to an antenna and the second winding coupled to at least one of a power amplifier and a low noise amplifier. The ... 08/25/05 - 20050186933 - Channel equalization system and method A system and method for delivering increases speed, security, and intelligence to wireline and wireless systems. The present invention includes a new generation Fast Circuit Switch (packet/circuit) Communication processors and platform which enables a new Internet Exchange Networking Processor Architecture at the edge and core of every communication system, for ... 07/14/05 - 20050153674 - Noise removal device An improved noise removal device capable of improving a removal precision of removing a pulse noise from a received signal. The noise removal device comprises: a hold control unit for receiving an input signal containing a received signal and a pulse noise mixed in the received signal, detecting pulse noise ... 06/30/05 - 20050143038 - Very low intermediate frequency image rejection receiver with image interference detection and avoidance A method and apparatus for minimizing image interference using a very low intermediate frequency image rejection receiver is disclosed. Image interference detection and avoidance by frequency plan adjustment within the very low intermediate frequency receiver image rejection receiver minimizes rejection requirements for an image reject mixer. Image rejection can be ... 06/23/05 - 20050136874 - Apparatus and method for removing dc offset in a frequency direct-conversion device An apparatus for removing a DC offset during frequency direct conversion in a reception device of a wireless communication system. In the apparatus, an adder receives a digital baseband signal comprising a DC component, receives an estimated DC offset value, and calculates a difference between the digital baseband signal with ... 06/09/05 - 20050124310 - Receiver A receiver capable of removing multipass distortion and improving an S/N. The receiver of the invention comprises a multipass removal filter for removing the multipass distortion from an intermediate frequency signal digitized by an A/D converter, an FM detector for detecting a desired signal outputted from the multipass removal filter, ... ### FreshPatents.com Support |