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| Number | Title | Issue Date |
| 8126418 | Preselector interference rejection and dynamic range extension A wireless telemetry module and associated method reject interference in a received signal. The wireless telemetry module includes an antenna receives a communication signal transmitted at a desired channel frequency and having a channel bandwidth. A transceiver is ... | 02/28/2012 |
| 7616936 | Push-to-talk system with enhanced noise reduction Methods and apparatus for reducing the effect of surrounding noise in a push-to-talk (PTT) system are disclosed. In one embodiment, a method includes obtaining a first media stream using a microphone when a PTT functionality of a PTT communications system is in a fi... | 11/10/2009 |
| 7519347 | Method and device for noise detection A system and method for detecting cell phone noise induced in telecommunication equipment, especially in microphones and other unshielded electronic units connected to a communication terminal. A noise detector is configured to execute a so-called “cepstrum” tra... | 04/14/2009 |
| 7421264 | Device and method for reducing vibration effects on position measurement A device (10) for reducing vibration effects on position measurement includes a receiver (12) for providing position signals (13); and a vibration control circuit (18) operative to control position information generation based on the posi... | 09/02/2008 |
| 7369831 | Radio wave receive, radio wave reception integrated circuit, wave clock, and repeater An SW control circuit turns ON and OFF a switch circuit provided between a reception antenna and an RF amplifier circuit, based on a noise removal control signal which is generated by a timing generation circuit and has a constant pulse width and a constant pulse in... | 05/06/2008 |
| 7369836 | Adjacent interference removal device An adjacent interference removal device capable of providing an improved reception quality. An IF signal Sin having passed through an IF filter having a pass frequency band width of 200 kHz is supplied to a first narrow band filter having a pass frequency band width... | 05/06/2008 |
| 7363063 | Mobile wireless communications device with reduced interference from the keyboard into the radio receiver A mobile wireless communications device includes a housing and circuit board carried by the housing. Radio frequency (RF) circuitry carried by the circuit board forms a transmitter and receiver. A processor is carried by the circuit board and operative with the RF c... | 04/22/2008 |
| 7305221 | Intermediate frequency circuit of television tuner A mixer for tuning to an intermediate frequency signal, an intermediate frequency amplifier provided at a rear stage of the mixer, an intermediate frequency tuning circuit interposed between the mixer and the intermediate frequency amplifier for tuning to the interm... | 12/04/2007 |
| 7298803 | Methods and apparatuses for filtering common mode interference In one embodiment, a method that includes detecting a level on each of a plurality of data channels; summing the levels of a subset of data channels to get a summed level, the subset of data channels containing the lowest levels present in the plurality of data chan... | 11/20/2007 |
| 7293705 | Radio frequency identification method and system of distributing products A method and system for vending products from a defined area, such as a micro-warehouse with a door. The method includes fitting each product with a radio frequency identification tag, positioning the plurality of products in a micro-warehouse, sensing opening and c... | 11/13/2007 |
| 7292637 | Noise-tolerant signaling schemes supporting simplified timing and data recovery Described are communication systems that convey differential and common-mode signals over the same differential channel. Noise-tolerant communication schemes use low-amplitude common-mode signals that are easily rejected by differential receivers, thus allowing for ... | 11/06/2007 |
| 7263342 | High frequency wireless receiver circuits and methods Embodiments of the present invention include circuits for use in wireless receivers that provide wide band matching with improved gain and noise performance. In one embodiment, the present invention includes a wireless receiver comprising an antenna, a first transis... | 08/28/2007 |
| 7260370 | Wireless communication system using a plurality of antenna elements with adaptive weighting and combining techniques The present invention provides a method and system for operating a wireless communication system in which received signals from a plurality of antennas are weighted and combined with a beam forming operation to form an output signal. The beam forming operation deter... | 08/21/2007 |
| 7258276 | Radio frequency identification method and system of distributing products A method and system for vending products from a defined area, such as a micro-warehouse with a door. The method includes fitting each product with a radio frequency identification tag, positioning the plurality of products in a micro-warehouse, sensing opening and c... | 08/21/2007 |
| 7228120 | 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... | 06/05/2007 |
| 7197291 | Multimode receiver and method for controlling signal interference A multimode wireless receiver circuit (10) includes multi-receiver control and interference detection logic (50) and least two separate receivers: a first receiver (20) associated with a first radio access technology and a second receiver (30... | 03/27/2007 |
| 7194244 | Wireless communication receiver A wireless communication receiver that is able to lessen the effect of noise that accompanies gain change by programmable gain amplifiers. The receiver includes an AGC controller which controls the timing at which the programmable gain amplifiers make gain change, u... | 03/20/2007 |
| 7181184 | Band edge amplitude reduction system and method A band edge amplitude reduction system changes the filtering characteristics of a receiver based on the amplitude of signal(s) adjacent to an edge of the operating band of the receiver and/or of signals not under the power control of the receiver. For example, the r... | 02/20/2007 |
| 7177616 | High linearity and low noise CMOS mixer and signal mixing method Method and apparatus are provided for high linearity and low noise communication signal mixing. The apparatus includes a high linearity low noise mixer having an input stage coupled to a switch stage by a series-coupled blocking capacitance and input resistance. The... | 02/13/2007 |
| 7177613 | Reducing noise and distortion in a receiver system A receiver, implemented with low noise and low distortion, to process an input signal containing signals of interest and unwanted interference signal. In an embodiment, the receiver contains a mixer which generates an intermediate signal in the form of an electric c... | 02/13/2007 |
| 7165720 | Radio frequency identification method and system of distributing products A method and system for vending products from a defined area, such as a micro-warehouse with a door. The method includes fitting each product with a radio frequency identification tag, positioning the plurality of products in a micro-warehouse, sensing opening and c... | 01/23/2007 |
| 7155179 | Full duplex transceiver having a method for immunizing itself against self-jamming A full-duplex transceiver using a method immunizing itself against self-jamming. The transceiver includes a receiver and a transmitter. The receiver includes a frequency immunization converter and a high pass IF filter. The transmitter transmits a TX signal. The rec... | 12/26/2006 |
| 7142834 | Noise removing circuit An object is to provide a noise removing circuit that can be integrally formed on a semiconductor substrate and can improve the accuracy of noise component removal. The noise removing circuit comprises a highpass filter detecting a noise component included in an inp... | 11/28/2006 |
| 7139543 | Distortion reduction in a wireless communication device The present invention provides a technique for cancellation of jammer signals in a radio frequency receiver. A radio frequency signal contains both a desirable signal and an undesirable jammer signal. The combined signal is processed with a filter (104) to ex... | 11/21/2006 |
| 7120410 | LNA gain adjustment in an RF receiver to compensate for intermodulation interference A Radio Frequency (RF) receiver includes a low noise amplifier (LNA) and a mixer coupled to the output of the LNA. The gain of the LNA is adjusted to maximize signal-to-noise ratio of the mixer and to force the mixer to operate well within its linear region when an ... | 10/10/2006 |
| 7116960 | Image-rejecting antenna apparatus An image-rejecting antenna apparatus includes an antenna unit for receiving or transmitting a wireless signal and an image-reject unit for removing an image component signal having a predetermined frequency from among signals received from the antenna unit. In an im... | 10/03/2006 |
| 7110480 | Adaptive array apparatus The control unit 50 calculates weighting factors for one symbol out of every k symbols. During this calculation, the control unit 50 calculates weighting factors for respective inphase and quadrature components of the symbol stored in every I and Q buf... | 09/19/2006 |
| 7084720 | Printed bandpass filter for a double conversion tuner A printed bandpass filter is mounted on a precision substrate to eliminate the need for post-fabrication tuning. The filter input is capacitively coupled to a series of quarter wavelength resonators and the filter output. The quarter wavelength resonators are printe... | 08/01/2006 |
| 7076228 | Interference reduction for multiple signals The present invention reduces the degradation in performance of one or more radio signals that are co-transmitted with a first radio signal from the same transmitting antenna in the same frequency channel and received by the same antenna due to multipath or other sh... | 07/11/2006 |
| 7046969 | Miniaturized transmitter-receiver unit A transmitter-receiver unit has an antenna patch and an IF circuit, between which there is a large frequency difference, on a first side of a multilayer substrate. A high frequency circuit (including a local oscillator and a demodulation unit) except for the IF circ... | 05/16/2006 |
| 7039360 | External noise intrusion prevention device, signal amplifier, protector and antenna plug An external noise intrusion prevention device preventing intrusion of external noise into a central conductor of a trunk cable in an up signal frequency band is provided. A first filter circuit 3 letting a signal in frequencies of 54 MHz or higher pass is pro... | 05/02/2006 |
| 7023937 | Receiver window design for multicarrier communication systems A receiver window design algorithm (210) is developed which minimizes the noise power of the demodulated multicarrier signal. The windows are effective on a variety of different channels and noise sources. Receiver windowing is a computationally efficient technique ... | 04/04/2006 |
| 6999741 | Signal processor and cooling method of the same, and radio receiver including the signal processor and cooling method of the same Provided is a signal processor including a band-pass filter and a low noise amplifier, which are covered with a vacuum insulation layer and cooled by a refrigerator. Further, a getter material where a heater for activation is built therein is installed in the vacuum... | 02/14/2006 |
| 6993311 | Radio receiver having an adaptive equalizer and method therefor A radio receiver (100) has an equalizer (500) that operates in the time domain to remove residual interference that is not removed by an IF filter (200) operating in the frequency domain that is caused by an adjacent interfering FM station. The ... | 01/31/2006 |
| 6973296 | Soft decision gain compensation for receive filter attenuation A wireless receiver including a receive chain, a synchronization processor, a memory, a combiner and a soft decision processor. The synchronization processor determines a frequency response of the wireless channel using synchronization data transmitted in the wirele... | 12/06/2005 |
| 6963727 | Direct-path-signal detection apparatus and associated methods Direct-path-signal (DPS) detector circuitry includes a standard deviation calculator circuitry configured to determine a standard deviation of a plurality of data values within a data frame. The data frame corresponds to a radio-frequency signal received via a commu... | 11/08/2005 |
| 6922574 | Mobile wireless communication devices with internal antennas and replaceable housings A wireless communication handset and system having improved antenna performance. The system includes a handset body (300) and multiple housing portions with different antenna loading characteristics, for example different materials or shapes, interchangeably ... | 07/26/2005 |
| 6906684 | Controlling a telescopic antenna mast A receiver receives an electromagnetic signal via an antenna mounted on an antenna mast. A signal evaluator determines or measures a signal quality level associated with the received electromagnetic signal. The signal quality compares the determined signal quality l... | 06/14/2005 |
| 6903606 | DC offset correction using unused LNA A receiver performs DC offset correction by preliminarily using an unused LNA with a terminating resistance to determine a base level DC offset. Once the DC offset is determined, a DC offset correction may be calculated and applied to an active LNA output. When dete... | 06/07/2005 |
| 6836673 | Mitigating ghost signal interference in adaptive array systems A method and apparatus for mitigating co-channel and inter-channel interference in an antenna array system. It is determined by a base station or other transmitter employing an antenna array that transmission of at least a first downlink signal will generate a co-ch... | 12/28/2004 |
