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| Number | Title | Issue Date |
| 7711336 | Single sideband mixer and method of extracting single sideband signal Single sideband (SSB) mixers and methods of extracting a SSB signal, which are capable of outputting a single frequency using a plurality of mixers and a local oscillating frequency without having to implement phase-shifting. In one embodiment, a single sideband (SS... | 05/04/2010 |
| 7558549 | Method and system for rejecting single-sided leakage into an amplitude modulated (AM) channel Aspects of the method and system for rejecting single sided leakage into an amplitude modulated channel may comprise an AM demodulator for demodulating a received composite broadcast signal's control channel to generate an amplitude modulated (AM) component. A PM de... | 07/07/2009 |
| 7430247 | Carrier frequency detection for N-ary phase modulated signal Carrier frequency detection for an N-ary modulated signal is achieved by digitizing the N-ary modulated signal, frequency shifting the digitized N-ary modulated signal to prevent aliasing, raising the frequency-shifted signal to the Nth power, transformin... | 09/30/2008 |
| 7418248 | Signal reception device, signal transmission device, radio communication system, and signal reception method A signal reception device is disclosed that is able to improve interference cancellation capabilities even when signals having different center frequencies exist on the same frequency band. The signal reception device includes an interference suppression unit to gen... | 08/26/2008 |
| 7403761 | System and method for frequency translation using an image reject mixer Frequency translation, such as frequency up conversion of a video baseband or intermediate frequency to a desired frequency division broadcast channel, is provided utilizing a single sideband or image reject mixer and filtering having relaxed selectivity requirement... | 07/22/2008 |
| 7382257 | Single RF oscillator single-side band modulation for RFID readers with frequency translation and filtering A transmitter shifts a baseband data signal having a bandwidth of 2ωM using a tone signal having a frequency ωM, which centers a sideband of the data signal at zero frequency. The transmitter then filters the shifted signal to filter out the ... | 06/03/2008 |
| 7340230 | Receiver architectures utilizing coarse analog tuning and associated methods Receiver architectures and associated methods are disclosed that provide initial analog coarse tuning of desired channels within a received signal spectrum, such as a set-top box signal spectrum for satellite communications. These architectures provide significant a... | 03/04/2008 |
| 7333608 | Analog scrambler An analog signal scrambler/de-scrambler includes a receiver for receiving an analog signal and converting the signal into an intermediate frequency signal. A generator generates a pseudo-random gaussian frequency distribution signal, which is multiplied with the int... | 02/19/2008 |
| 7330513 | Apparatus of transmitter and receiver for MIMO MC-CDMA system The invention relates to an apparatus of transmitter and receiver for Multiple Input/Multiple Output MultiCarrier-Code Division Multiple Access (MIMO MC-CDMA) systems. At the transmitter, modified orthogonal transmit diversity (MOTD) encoders are used for increasing... | 02/12/2008 |
| 7236757 | High-speed multi-channel communications transceiver with inter-channel interference filter A communication system is disclosed that allows high data-rate transmission of data between components. N-bit parallel data is transmitted in K-frequency separated channels on the transmission medium so as to fully take advantage of the overall bandwidth of the tran... | 06/26/2007 |
| 7209721 | Single sideband mixer and method of extracting single sideband signal Single sideband (SSB) mixers and methods of extracting a SSB signal, which are capable of outputting a single frequency using a plurality of mixers and a local oscillating frequency without having to implement phase-shifting. In one embodiment, a single sideband (SS... | 04/24/2007 |
| 7184716 | Low cost/low power analog transceiver architecture A time division duplex (TDD) single sideband (SSB) transceiver includes a transmitter adapted to input an analog audio signal, sample the analog audio signal, and to output an SSB frequency shift keyed (FSK) signal corresponding to the analog audio signal, the SSB F... | 02/27/2007 |
| 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 |
| 7177609 | Chopper-direct-conversion (CDC) radio architecture A chopper-direct-conversion (CDC) radio receiver includes a phase-alternating mixer receiving an antenna input signal and at least one local oscillator signal and generating a double sideband signal in a single mixing step. The phase-alternating mixer may be impleme... | 02/13/2007 |
| 7167694 | Integrated multi-tuner satellite receiver architecture and associated method Multi-tuner receiver architectures and associated methods are disclosed that provide initial analog coarse tuning of desired channels within a received signal spectrum, such as transponder channels within a set-top box signal spectrum for satellite communications. T... | 01/23/2007 |
| 7155189 | AM receiver An AM receiver with at least one IF filter with a fixed IF bandwidth comprises at least one downconversion stage (3, 4, 5) to shift the signal input thereto into an IF range (IF1) having a variable oscillation frequency (fLO1) which is adjus... | 12/26/2006 |
| 7120407 | Receiver and its tracking adjusting method A receiver such that the period required for tracking adjustment, temperature compensation is not needed, and tracking errors due to fluctuation of the power supply voltage are prevented from increasing, and a tracking adjusting method for the receiver. A DAC 4 | 10/10/2006 |
| 7107022 | Single RF oscillator single-side band modulation for RFID readers using tone insertion during reader reception A transmitter upconverts a SSB data signal during a first operational mode using a RF upconverting signal having a frequency that is offset from a center frequency of a channel (ωC) by an amount that depends on the data signal's SSB bandwidth (ωM | 09/12/2006 |
| 7099640 | Method distinguishing line of sight (LOS) from non-line of sight (NLOS) in CDMA mobile communication system The invention discloses a method that identifies whether a channel is LOS or NLOS in a mobile communication system. After coherent accumulation and non-coherent accumulation have been made by the system, first the method takes power difference between the direct pat... | 08/29/2006 |
| 7095781 | Polyphase filter with stack shift capability A discrete Fourier transform (DFT) filter bank with stack shift capability, configured, for example, as an analyzer, but equally applicable to a synthesizer, and implemented as a polyphase filter. The DFT filter bank includes a complex modulator for multiplying the ... | 08/22/2006 |
| 7092682 | Electronic circuit, modulation method, information processing device, and information processing method A shaped-wave application section inputs a first pulse signal corresponding to transmission data output from a transmission data output section, and applies, to a modulation and amplification section, a signal wave corresponding to a second pulse signal such that th... | 08/15/2006 |
| 7062244 | Speed-up mode implementation for direct conversion receiver A speed-up mode control system is operative to generate a speed-up mode signal based on a gain control signal from associated digital circuitry. The speed-up mode signal controls electronics associated with one or more amplifiers to facilitate settling time of an ou... | 06/13/2006 |
| 7061977 | Apparatus and method for using adaptive algorithms to exploit sparsity in target weight vectors in an adaptive channel equalizer An apparatus and method is disclosed for using adaptive algorithms to exploit sparsity in target weight vectors in an adaptive channel equalizer. An adaptive algorithm comprises a selected value of a prior and a selected value of a cost function. The present inventi... | 06/13/2006 |
| 7050831 | Through-the-earth communication system A method and system for communication within an energy-transmission-limited environment. RF transceivers throughout the site are located site-wide such that areas within the site in which communications are desired are within range of at least one of the RF transcei... | 05/23/2006 |
| 7043211 | Universal modulator A modulator generates a combined signal consisting of audio and video signals and converts the combined signal to one of a plurality of frequencies in dependence upon a desired output frequency and broadcast standard. The modulator includes a summing amplifier, a fi... | 05/09/2006 |
| 7043026 | Method for removing AM neighboring interference and a circuit for the same An AM neighboring interference removing method and circuit is provided which can select only a desired AM modulation wave even if an interference AM modulation wave is partially superposed upon the desired AM modulation wave. An AM modulation wave desired to be rece... | 05/09/2006 |
| 7027833 | Dual band superheterodyne receiver A MMIC based superheterodyne receiver for converting at RF energy in an upper and a lower frequency band includes at least one attenuator for the RF energy input, a mixer for mixing the lower band input with a LO1 signal, another mixer for mixing the upper band inpu... | 04/11/2006 |
| 7003262 | Method and device for determining sideband ratio of superconduction mixer using comb generator The present invention provides a method and device for determining the sideband ratio of a superconducting mixer using a comb generator. The method includes the steps of: (a) tentatively adjusting the sideband ratio of a mixer for calibration of an output of the com... | 02/21/2006 |
| 6973188 | Analog scrambler A method for scrambling/descrambling an analog signal includes receiving an analog signal and converting the signal into an intermediate frequency signal. A Gaussian pseudo-random noise signal is generated and then multiplied with the intermediate frequency signal t... | 12/06/2005 |
| 6965757 | Multiband short range radio receiver for motor vehicle data The short range radio receiver for motor vehicle data comprises antenna circuits (1–4) connected to a unit (10–15) for processing a carrier in a plurality of specific frequency bands which is modulated by a data signal, the unit (10–15) co... | 11/15/2005 |
| 6922554 | Method for implementing a transceiver and a transceiver The invention relates to a method for implementing a transceiver, in which method radio-frequency signals are transmitted and received with a transceiver for communicating information. A radio-frequency signal received at a receiving stage is subjected to at least a... | 07/26/2005 |
| 6889035 | Cable-less interconnect architecture for effecting blind coupling of diplexer to radio transceiver An RF cable-less interconnect arrangement couples a diplexer to a radio transceiver by providing each of the transceiver and the diplexer by means of respective pairs of RF transmission and receiver channel connectors. The two sets of connectors are supported at a p... | 05/03/2005 |
| 6804308 | Receiver including frequency down-converter and analog-to-digital converter for a wireless telecommunication system A receiver (10) for a wireless telecommunications system that provides relatively wideband signal processing of received signals without increased signal distortion so that multiple received signals can be simultaneously processed. The receiver (10) in... | 10/12/2004 |
| 6798848 | Architecture for multi-carrier receiver A receiver (10) for a wireless telecommunications system that provides relatively wideband signal processing of received signals without increased signal distortion so that multiple received signals can be simultaneously processed. The receiver (10) in... | 09/28/2004 |
| 6792051 | In-band-on-channel broadcast system for digital data An FM broadcast transmitter transmits a broadcast signal having a carrier at a broadcast frequency and sidebands, able to be transmitted at full power, within a transmission band-width around the carrier. It includes a source of a modulated FM stereo signal having a... | 09/14/2004 |
| 6771707 | Digital television receiver converting vestigial-sideband signals to double-sideband AM signals before demodulation A vestigial-sideband (VSB) signal is down-converted to generate a VSB signal including a carrier frequency offset from zero frequency by an amount greater than the bandwidth of the VSB signal. The carrier of this final I-F signal has a carrier offset from zero-frequ... | 08/03/2004 |
| 6724441 | Tuning system and method in broadcast signal receiver A tuning system and a tuning method in a broadcast signal receiver, in which a radio frequency (RF) spectrum signal adopting an inverting method is filtered by an asymmetric bandpass filter of a tuner to improve the receiving sensitivity. This tuning system includes... | 04/20/2004 |
| 6671378 | Detection of noise in a frequency demodulated FM audio broadcast signal The noise in a frequency demodulated audio signal is detected on basis of the characteristics of the stereo-multiplex signal to obtain a very reliable information that can be used for the sliding stereo-mono transition, noise blanking and a de-noising of ... | 12/30/2003 |
| 6631255 | Multi-carrier receiver for a wireless telecommunication system A receiver (10) for a wireless telecommunications system that provides relatively wideband signal processing of received signals without increased signal distortion so that multiple received signals can be simultaneously processed. The receiver (10) inclu... | 10/07/2003 |
| 6178312 | Mechanism for automatically tuning transceiver frequency synthesizer to frequency of transmit/receiver filter Frequency synthesizers of a radio transceiver are automatically tuned so that its transmit and receive frequencies correspond to whichever upper band and lower band filters the radio transceiver has been connected by the user. A capacitive electrical impe... | 01/23/2001 |
