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Lawrence Welk, the bandleader who entertained millions of Americans over a generation of broadcasting his TV show, once received a patent: for a music-themed design of an ashtray.
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| Number | Title | Issue Date |
| 8098718 | Apparatus and methods for digital-to-analog conversion with vector quantization A digital-to-analog converter (DAC) includes a mismatch shaping feedback vector quantizer configured to store state information in expanded format using One-Hot Encoding of a matrix. The expanded state format storage enables implementation of a simplified state sort... | 01/17/2012 |
| 7684475 | Control system methods and apparatus for inductive communication across an isolation barrier Improved control apparatus and methods transfer information between devices, such as controllers and field devices, utilizing a modulator that generates a pulse width modulated (PWM) signal containing information to be transferred by a first of the devices, e.g., th... | 03/23/2010 |
| 7433683 | System for fast macrodiversity switching in mobile wireless networks Fast macrodiversity switching (FMS) dynamically switches radio links used for traffic and control channels for a mobile station among a number of base transceiver stations (BTS) without changing the radio resource, that is, using the same frequency and time slot com... | 10/07/2008 |
| 7430235 | Apparatus for providing a multi-mode interface between a baseband receiver and radio frequency circuitry An apparatus for providing a multi-mode interface between a baseband receiver and radio frequency (RF) circuitry. According to a preferred embodiment of the invention, the apparatus includes a first differential-to-single-ended converter, a second differential-to-si... | 09/30/2008 |
| 7395042 | Enhancing signals in a two-way radio system Embodiments of the present invention can be used to enhance signals in a peer-to-peer radio system, such as a two-way radio system. In one embodiment, the invention includes receiving a communications signal on a channel from a remote radio at a radio using a plural... | 07/01/2008 |
| 7394857 | Flexible versatile low-cost wireline transmit driver A versatile, programmable, low-cost transmit line driver is provided. The line driver includes a digital-to-analog converter that receives a digital input and provides an analog output. The line driver is reconfigurable between the voltage mode of operation. ... | 07/01/2008 |
| 7369516 | Adaptive echo canceling A method for transmitting data signals in full duplex with echo cancellation between a first and a second modem connected by a two-wire channel, wherein a data signal is a function of at least one data symbol in a stream of data symbols generated by a modem comprisi... | 05/06/2008 |
| 7369824 | Receiver storage system for audio program A receiver contains a demodulator system that can deliver a stream of digital data comprising at least a first and a second set of audio data. In a first time interval, a memory is used to store either the first or the second set of audio data. In a subsequent time ... | 05/06/2008 |
| 7362781 | Wireless methods and devices employing steganography Wireless devices and methods employ steganography to convey auxiliary data in addition to audio information. An exemplary application is a battery-powered cell phone, having, e.g., a microphone, a speaker, a modulator, an antenna, and an RF amplifier. The steganogra... | 04/22/2008 |
| 7353027 | Seamless handoff in mobile IP In a system and method for handing off a mobile node in a seamless manner in a wireless access network, procedures are implemented for allowing the mobile node to synchronize the handoff with a base node (e.g., a home agent) and a correspondent node. In this way, a ... | 04/01/2008 |
| 7349486 | System and method for recognizing zero-amplitude symbols in a QAM signal and digital receiver incorporating the same A system for, and method of, recognizing zero-amplitude symbols in a quadrature amplitude modulated (QAM) signal and a digital receiver incorporating the system or the method. In one embodiment, the system includes: (1) an amplitude detector that extracts a candidat... | 03/25/2008 |
| 7343135 | Method and apparatus for down conversion of radio frequency (RF) signals There is a need for an inexpensive, high-performance, fully-integrable, multi-standard transceiver, which suppresses spurious noise signals. The invention provides a topology that satisfies this need, using a first signal generator which produces an oscillator signa... | 03/11/2008 |
| 7336697 | Code division multiple access mobile communication system A code division multiple access (CDMA) mobile communication system with improvements to permit stable reception with a minimum of bit error. The system includes a base station and a mobile station for communicating with the base station. The mobile station includes ... | 02/26/2008 |
| 7330562 | Watermarking in the time-frequency domain Methods and systems for time-frequency domain watermarking of media signals, such as audio and video signals. An encoding method divides the media signal into segments, transforms each segment into a time-frequency representation, and computes a time-frequency domai... | 02/12/2008 |
| 7327998 | System and method of providing a geographic view of nodes in a wireless network A geographic view rendering tool receives geographic location data for nodes in a wireless network and renders a geographic view displaying the nodes at their corresponding geographic locations. The geographic view may be displayed overlaying a digital map. The geog... | 02/05/2008 |
| 7328236 | Method and system for accessing information and/or data available on a wide area computer network There is disclosed a method and a system for accessing information and/or data available on a wide area computer network (100), such as the Internet. A first modulated acoustic signal (A) is transmitted to a group of potential users each provided with a porta... | 02/05/2008 |
| 7319885 | Radio communication apparatus and method A radio communication apparatus compatible with a plurality of communication systems and application services comprises a radio transmitting/receiving unit for transmitting and receiving a radio signal, signal processing circuit for executing part of digital signal ... | 01/15/2008 |
| 7317931 | Transmission rate changes in communications networks A communications network including first and second stations, the first station comprising a transmitter and the second station comprising a receiver. The network further including a transition control portion which is operable, prior to a change in a transmission r... | 01/08/2008 |
| 7315162 | Reducing power consumption of electrical meters The invention contemplates an electrical power meter and method of operating the electrical power meter. The inventive power meter includes a power supply for converting alternating current (AC) voltage to a direct current (DC) voltage for powering the electronic co... | 01/01/2008 |
| 7313175 | Method for avoiding interference radiation of AM transmitters used in digital transmission A method for avoiding spurious emissions in an AM transmitter for digital transmission includes converting a digital modulation for controlling the AM transmitter into an amplitude signal and a phase-modulated RF signal. Non-linear distortions in an amplitude respon... | 12/25/2007 |
| 7312721 | Data collector for an automated meter reading system The invention includes an electronic utility meter, a data collector/meter and a method for communicating data in an automated meter reading system. The inventive method includes communicating data with a network and a first electronic utility meter, and communicati... | 12/25/2007 |
| 7308032 | Oversampling D/A converter and method for shaping nonlinear intersymbol interference in an oversampling D/A converter A method and a device for spectrally shaping nonlinear intersymbol interference (NLISI) in an oversampling digital-to-analog converter are disclosed. At least one higher-order shaper circuit is provided, so as to shape NLISI, causing energy associated with NLISI to ... | 12/11/2007 |
| 7305037 | Calibration system for a communications system A calibration system for a communication system is provided featuring a transmitter circuit, a receiver circuit, a transmission medium having a transfer function for transmitting a signal between the transmitter and receiver circuits, and a calibration system respon... | 12/04/2007 |
| 7301476 | Dynamic self-configuring metering network A dynamic self-configuring system for collecting metering data comprises a collector meter. The collector meter scans for meters that are operable to directly communicate with the collector and registers such meters as level one meters. The collector transmits instr... | 11/27/2007 |
| 7286614 | Pilotless, wireless, telecommunications apparatus, systems and methods Systems, methods and apparatus are provided for demapping a received wireless signal. The wireless signal includes signal-bearing data without accompanying pilot signals, and demapping is accomplished by extracting information from the signal-bearing data by reducin... | 10/23/2007 |
| 7286990 | Universal interface for voice activated access to multiple information providers An interface for accessing data from one or more information systems using a wireless telephone or other user device. The interface is presented to a user as an abstraction of a unified mailbox and permits access by the user to messaging and other services from the ... | 10/23/2007 |
| 7280593 | Method and system for sample and reconstruction synchronization for digital transmission of analog modem signal A method and system for the synchronization of the transmission of digitally converted analog modem signals between two or more modems using either RF over-the-air or A/C power line communication channels. This invention provides for modem speed optimization by mini... | 10/09/2007 |
| 7277546 | Methods and apparatus for multi-level dynamic security system Methods and apparatus for converting original data into a plurality of sub-bands using wavelet decomposition; encrypting at least one of the sub-bands using a key to produce encrypted sub-band data; and transmitting the encrypted sub-band data to a recipient separat... | 10/02/2007 |
| 7272373 | Ratiometric clock systems for integrated receivers and associated methods A ratiometric clock system for an integrated receiver and associated method are disclosed that provide an advantageous solution for combining digital signal processing (DSP) circuitry on the same integrated circuit as mixer and local oscillator (LO) generation circu... | 09/18/2007 |
| 7266349 | Multi-mode crystal oscillator In one embodiment of the present invention, two crystal oscillator circuits are coupled in parallel to provide differing performance according to mode. Generally, a first circuit provides low phase noise and high accuracy while a second circuit provides greater phas... | 09/04/2007 |
| 7265702 | Method for converting an analog signal to multiple different phase outputs utilizing an analog-to-digital converter A method for converting an analog signal to multiple different phase outputs with an analog-to-digital converter is provided. First, the analog signal is converted to a high-frequency datastream with a delta-sigma modulator. A plurality of low-frequency datastreams ... | 09/04/2007 |
| 7262709 | System and method for efficient configuration in a fixed network automated meter reading system Meters are configured using either a program update method or a meter update method. In the program update method, meters associated with a specified configuration program are identified and configured with updated parameters. In the meter update method, a specified... | 08/28/2007 |
| 7253753 | Method and apparatus of performing sample rate conversion of a multi-channel audio signal A method and apparatus are disclosed for performing sampling rate conversion of an audio signal from a first sampling rate to any of a plurality of higher sampling rates using a single set of low-pass filter coefficients. Sampling rate conversion is accomplished by ... | 08/07/2007 |
| 7254828 | Multiple input data receiver for cable television systems A multiple input data receiver for bi-directional cable television (CATV) systems simultaneously monitors and selectively receives a return path signal on a plurality of return paths. When an appropriate data or signal transmission is detected on a return path, the ... | 08/07/2007 |
| 7245655 | Dual antenna receiver Structures and techniques for implementing multiple-antenna configurations within a radio frequency receiver are provided. In one aspect, a modularized multi-antenna receiver is provided having multiple independent microelectronic dice mounted on a common module sub... | 07/17/2007 |
| 7243037 | Signal processing device, use of the signal processing device and method for signal processing A signal processing device is provided that includes a modulation unit that produces an amplitude element as well as a phase element from components that are applied thereto. A correction device is also provided, in which at least one of the components is supplied a... | 07/10/2007 |
| 7242903 | Digital receiver with aural interface A digital audio receiver particularly beneficial to the sight-impaired and controlled by the broadcaster has means for separating and storing audio clips transmitted by the broadcaster to be reproduced either in response to user operations (e.g. “volume up”, “... | 07/10/2007 |
| 7239250 | System and method for improved transmission of meter data The system includes a number of first meters, which are typically battery powered transmit only devices. The system includes a number of two-way meters, which are operable to both transmit and receive data. The first meters transmit their data to the collector eithe... | 07/03/2007 |
| 7233777 | Separation of AM cochannel signals in an overloaded signal environment Multiple cochannel AM signals received in an overloaded signal environment may be separated using RF data through a method of iterative projections. ... | 06/19/2007 |
| 7227350 | Bias technique for electric utility meter The invention contemplates an electrical power meter and method of operating the same, where the meter has electronic components (e.g., a power supply and a voltage sensing circuit) and receives alternating current (AC) voltage from an electrical power line. The inv... | 06/05/2007 |
