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US20110130092 WIRELESS COMMUNICATIONS SYSTEMS USING MULTIPLE RADIOS  
The present invention relates to a communication system and methods of use thereof. The system includes sets of complementary radios for transmitting and receiving signals to achieve high...
US20050042999 Broadband repeater with security for ultrawideband technologies  
An ultrawideband radio transceiver/repeater provides a low cost infrastructure solution that merges wireless and wired network devices while providing connection to the plant, flexible repeater...
US20070254614 SECURE WIRELESS CONNECTIONS USING SSID FIELDS  
Secure wireless connections can be established by broadcasting wireless security parameters within SSID fields. A wireless security parameter can be received and a broadcast SSID generated from...
US20120003948 Quadratic Amplitude Control Circuit For Cosite Interference Cancellation  
A quadratic amplitude matching system and associated method with an associated tuning control system is provided for continuously and automatically tuning a quadratic amplitude matching filter...
US20110319046 Quadratic Amplitude Control Circuit For Cosite Interference Cancellation  
A quadratic amplitude matching system and associated method with an associated tuning control system is provided for continuously and automatically tuning a quadratic amplitude matching filter...
US20110003573 System and Method for Performing RF Filtering  
A method of filtering and a RF filtering circuit comprising a LO adapted to generate in-phase and quadrature LO signals; a quadrature passive mixer operatively connected to the LO; a filtering...
US20140155013 BASEBAND HARMONIC REJECTION CIRCUIT  
A circuit for baseband harmonic rejection includes multiple transconductance cells coupled to one another at outputs of the transconductance cells and configured to receive down-converted signals...
US20150207530 SUPER-REGENERATIVE RECEIVER (SRR) AND SUPER-REGENERATIVE RECEPTION METHOD WITH INCREASED CHANNEL SELECTIVITY  
A super-regenerative receiver (SRR) includes a super-regenerative oscillator (SRO), and an active channel filter disposed at a front end of the SRO, and configured to filter out an interferer in a...
US20100296553 PROCESSING DIGITAL SAMPLES IN A WIRELESS RECEIVER  
A method of processing digital samples of a signal received at a receiver of a wireless communication system includes monitoring channel conditions and generating a channel indicator including at...
US20120322395 REJECTION OF RF INTERFERERS AND NOISE IN A WIRELESS COMMUNICATIONS TRANSCEIVER  
The invention provides a radio receiver or transceiver having one or more low noise amplifiers corresponding to one or more antenna inputs wherein one or more outputs of the one or more low noise...
US20100328546 Tracking Filter For A Television Tuner  
In one embodiment, a set of tracking filters to be coupled between an amplifier and a mixer is provided. The tracking filters may be differently configured depending on band of operation. For...
US20140024329 FRONT END RADIO ARCHITECTURE HAVING A SPLIT BAND ARRANGEMENT WITH CO-BANDING  
A front end radio architecture is configured to provide a split band frequency arrangement that includes co-banding. The disclosed split band frequency arrangement combines a medium bandwidth...
US20090088117 Receiver capable of reducing local oscillation leakage and in-phase/quadrature-phase (I/Q) mismatch and an adjusting method thereof  
An adjusting method for reducing local oscillation leakage or I/Q mismatch in a receiver includes the steps of: (a) detecting a current extent of local oscillation leakage or I/Q mismatch; (b)...
US20110312294 AUDIO HOLE SUPPRESSION METHOD AND APPARATUS FOR A TWO-WAY RADIO  
A channel scanning technique and apparatus provides audio hole suppression in two-way radio communications. Upon detecting the absence of a carrier signal on a priority channel during a priority...
US20100317311 Protection for SAW-Less Receivers  
Embodiments of a SAW-less RF receiver front-end that includes a frequency translated notch filter (FTNF) are presented. An FTNF includes a passive mixer and a baseband impedance. The baseband...
US20140335812 RADIO RECEPTION DEVICE AND RADIO RECEPTION METHOD IN RADIO COMMUNICATION SYSTEM  
A radio reception device and a radio receiving method are provided that, when a frequency band assigned to a different radio system is shared, can effectively suppress the influence of interfering...
US20110261912 Performing Impulse Blanking Based On Blocker Information  
One aspect of the present invention is directed to an apparatus to perform impulse blanking of a received signal at multiple locations of a signal processing path. To effect such impulse blanking,...
US20130157606 SYSTEM FOR RECEIVING SATELLITE SIGNALS  
System for receiving satellite signals jammed by at least one source of interference and by a thermal noise comprising means for receiving the said satellite signals, means for filtering the said...
US20080216128 Apparatus for Receiving Satellite Broadcasting and Method Thereof  
A method for receiving satellite broadcasting includes: amplifying an inputted satellite broadcasting signal; converting the amplified signal to a baseband signal by mixing the amplified signal...
US20090117869 Digital tunning error correction for intergrated receivers and associated methods  
A digital tuning error correction system for an integrated receiver and associated method are disclosed that provide an advantageous solution for combining digital signal processing (DSP)...
US20090036086 REDUCING SPECTRAL ROLL-OFF FACTORS TO INCREASE SPECTRAL EFFICIENCY  
Systems for delivering a plurality of broadcast programs where the transmitter and receiver roll-off factors are mismatched. A system in accordance with the present invention comprises a...
US20100136940 SYSTEM AND METHOD OF JOINT SYNCHRONIZATION AND NOISE COVARIANCE ESTIMATION  
A system and method in a radio receiver for joint synchronization and noise covariance estimation of a received signal. A spatially and temporally stacked signal model, whereby successive samples...
US20110013686 SYSTEMS AND METHODS FOR IMPROVING CHANNEL ESTIMATION  
A method for improving channel estimation in a wireless communication system is disclosed. A wireless signal that includes a plurality of multipath components is received. N channel estimates are...
US20140302809 DETECTION AND MITIGATION OF INTERFERENCE BASED ON INTERFERENCE LOCATION  
Embodiments include a novel receiver architecture to optimize receiver performance in the presence of interference. In various embodiments, the presence of interference is detected, and the...
US20140004812 DETECTION AND MITIGATION OF INTERFERENCE BASED ON INTERFERENCE LOCATION  
Embodiments include a novel receiver architecture to optimize receiver performance in the presence of interference. In various embodiments, the presence of interference is detected, and the...
US20110124308 SYSTEM AND METHOD FOR ZERO INTERMEDIATE FREQUENCY FILTERING OF INFORMATION COMMUNICATED IN WIRELESS NETWORKS  
A circuit for communicating information in a wireless network includes a filtering circuit in communication with a zero intermediate frequency (ZIF) transceiver circuit. The filtering circuit...
US20080248770 BROADBAND RECEPTION SYSTEM  
A reception system is proposed which is intended for receiving radio broadcasting in the AM and FM bands having an antenna coupled to an analog part on the input side, for receiving a complete...
US20100311380 Method and System for Amplitude Modulation Utilizing a Leaky Wave Antenna  
Methods and systems for amplitude modulation using a leaky wave antenna are disclosed and may include amplitude modulating an output of one or more power amplifiers in a wireless device by...
US20090247107 SIMPLIFIED INTERFERENCE SUPPRESSION IN MULTI-ANTENNA RECEIVERS  
A signal received via a plurality of antennas, and containing an interference component and a desired communication component, is processed to suppress the interference component. The interference...
US20090318099 Peak Suppressing Apparatus, Peak Suppressing Method, and Wireless Communication Device  
A peak suppressing apparatus includes an amplitude limiter that limits amplitude of the transmission signal with a predetermined threshold; a peak-suppressing-signal extracting unit that extracts...
US20150094009 BRANCH CIRCUIT AND BRANCH CABLE  
A branch circuit includes a common antenna port and separates a first communication signal including a signal in a low band and a signal in a high band and a second communication signal that is a...
US20100136941 Quadratic amplitude control circuit for cosite interference cancellation  
A quadratic amplitude matching system and associated method with an associated tuning control system is provided for continuously and automatically tuning a quadratic amplitude matching filter...
US20120190323 SMOOTHING FILTER FOR IRREGULAR UPDATE INTERVALS  
A technique for determining a received signal strength from multiple messages filters noise from the received signal to provide an accurate signal strength value. Advantageously, the more accurate...
US20100261504 High-selectivity low noise receiver front end  
Provided is a remote radio head receiver, including an antenna and an interference mitigation block. The antenna is configured to receive a signal. The interference mitigation block is configured...
US20140073281 HIGH DYNAMIC RANGE RECEIVER FRONT-END WITH Q-ENHANCEMENT  
A preselect circuit maintains the dynamic range of a received RF input signal during bandpass filtering of the received RF input signal. The preselect circuit includes a Q-deficient passive...
US20100323654 HIGH DYNAMIC RANGE RECEIVER FRONT-END WITH Q-ENHANCEMENT  
A preselect circuit maintains the dynamic range of a received RF input signal during bandpass filtering of the received RF input signal. The preselect circuit includes a Q-deficient passive...
US20110171922 SYSTEMS, METHODS, AND APPARATUSES FOR REDUCING INTERFERENCE AT THE FRONT-END OF A COMMUNICATIONS RECEIVING DEVICE  
Embodiments of the invention may provide for reducing interference in the front-end of a communications receiver. The cancellation circuitry may be utilized in conjunction with a preliminary...
US20130045705 Filtering Interference Detected at Wireless Receiver  
A wireless receiver for UWB or other format receives a useful signal in a particular band of frequencies in spite of interference components. The wireless receiver has two or more different types...
US20110319047 OFF-LINE CHANNEL TUNING AMPLITUDE SLOPE MATCHED FILTER ARCHITECTURE  
A tuning control system and associated method is provided for continuously and automatically tuning a lobed amplitude slope matching filter (ASMF) to a band center of an interfering signal to...
US20100093296 DOWNCONVERSION STRATEGIES FOR REDUCING INTERFERENCE IN WANTED SIGNALS  
A receiver for isolating a wanted signal in a received signal, the receiver comprising a downconverter for downconverting the received signal in frequency to produce a downconverted signal, a...
US20120264388 Adaptive Interference Nulling for MIMO Receiver Based on Interference Characteristics  
Interference in an unlicensed frequency band is spatially filtered out from received signals at a wireless device operating in the unlicensed frequency band. Energy received at a plurality of...
US20080143580 JAMMER DETECTION AND SUPPRESSION FOR WIRELESS COMMUNICATION  
Techniques for detecting and suppressing jammers are described. A receiver may perform post-FFT jammer detection and pre-FFT jammer suppression. The receiver may transform an input signal to...
US20090156154 Satellite-band spectrum utilization using receiver filters to reduce interference  
A first and/or a second communications system may provide communications service over a geographic area. A method of operating the first and/or the second communications systems may include...
US20140106698 VARIABLE BAND PASS FILTER DEVICE  
A variable filter device has: a first series arm which is serially connected to a signal line, includes a variable capacitance and an inductance, and constitutes a series resonator; first and...
US20140113580 SPLITTER  
In a splitter, a first band pass filter is connected between an antenna terminal and a first terminal, a high pass filter and a second band pass filter are connected between the antenna terminal...
US20120202444 ADJACENT CHANNEL OPTIMIZED RECEIVER  
The present invention offers significant improvements in the performance of a radio receiver operating in an environment with high desired band interference. The present invention comprises a high...
US20090163168 EFFICIENT INITIALIZATION OF ITERATIVE PARAMETER ESTIMATION  
The invention provides a method to initialize an iterative signal estimation algorithm, such as an expectation-maximization type algorithm, the method including the step of performing a...
US20110003572 Layout Techniques For Frequency Translated Filters  
Embodiments of a SAW-less RF receiver front-end that includes a frequency translated notch filter (FTNF) are presented. An FTNF includes a passive mixer and a baseband impedance. The baseband...
US20090275304 MULTIMODE RECEIVER WITH ACTIVE BLOCKER SUPPRESSION  
Various embodiments of a wireless multimode receiver having an off-chip duplex filter associated with a multimode band, and a blocker cancellation circuit disposed on a semiconductor chip are...
US20140018029 Method of Compensating Signal Imbalance of Wireless Communication System  
Filter coefficients are generated by testing a wireless communication system using single-tone signals. While using the filter coefficients in a filter module, signal imbalance caused by a local...
Matches 1 - 50 out of 187 1 2 3 4 >