Celebrity Inventors
Mark Twain (Samuel L. Clemens) received Patent No. 121,992 for "An Improvement in Adjustable and Detachable Straps for Garments." He later received two more patents: one for a self-pasting scrapbook and one for a game to help players remember important historical dates.
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| Number | Title | Issue Date |
| 8026758 | FM demodulator There is provided an FM demodulator comprising a transistor (Q323), a filter unit for producing first and second amplitude-modulated signals from a received frequency-modulated signal, wherein the filter unit is coupled to the switching transistor (Q323 | 09/27/2011 |
| 7663431 | Tuner and demodulating unit thereof A tuner and a demodulating unit thereof are provided. A trap filter for a specific frequency is installed in the IF demodulating unit so as to eliminate a frequency signal acting as a beat component. ... | 02/16/2010 |
| 7433428 | Method of reducing the variance of the signal-to-noise rate estimated for a signal with amplitude differential phase-shift keying modulation This method reduces the variance of the estimation of the signal-to-noise rate in a multiuser digital communications system. These communications require a sending of a phase reference symbol prior to sending a information, where the estimation is made of the signal... | 10/07/2008 |
| 7428280 | Receiving apparatus and transceiver The present invention has a N pieces of receiving antennas, a propagation path characterization estimator, a weight generator for interference canceller, an array processing interference canceller, a weight generator for signal estimator, a signal estimator, a trans... | 09/23/2008 |
| 7348838 | 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 representa... | 03/25/2008 |
| 7295871 | ECG signal processor and method Chest compressions are measured and prompted to facilitate the effective administration of CPR. A displacement detector determines a displacement indicative signal indicative of the displacement of the CPR recipient's chest toward the recipient's spine. A signaling ... | 11/13/2007 |
| 7277688 | DC offset correction for very low intermediate frequency receiver A wireless receiver includes a local oscillator, a mixer, a band pass filter, a DC offset determination module, a DC offset correction module, a subtraction module, and a down converter. The local oscillator produces a local oscillation that a mixer uses to down con... | 10/02/2007 |
| 7260163 | Noise blanker using an adaptive all-pole predictor and method therefor A noise blanker (40, 106) monitors and removes noise from a sampled signal by adaptive filtering (98, 150) the sampled signal to generate trained adaptive filter prediction coefficients. The sampled signal is provided as an output signal when the noise... | 08/21/2007 |
| 7242720 | OFDM signal communication system, OFDM signal transmitting device and OFDM signal receiving device An OFDM signal communication system used in broadband mobile communication, achieves stable operation under severe frequency selective fading environments, giving high quality. The OFDM signal communication system which transmits OFDM signals over the same radio fre... | 07/10/2007 |
| 7203157 | Equalization method and device of the GMMSE type Exemplary embodiments of the invention provide an equalization method for a downlink channel in a telecommunication system transmitting MC-CDMA symbols on a plurality of carrier frequencies, in which a plurality of links are established between a transmitter and a p... | 04/10/2007 |
| 7184487 | Receiver with chopper stabilization and method thereof A receiver (202) has a down-conversion receiver (304) for transforming a signal (201) from a first operating frequency to a second operating frequency that is lower than the first operating frequency, and a receiver filter (308) with chop... | 02/27/2007 |
| 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 |
| 7133476 | Apparatus and methods for suppression of interference among disparately-modulated signals Information is recovered from a composite signal including first and second component signals modulated according to respective first and second modulations, for example, 8-PSK and GMSK. The composite signal is processed based on predetermined characteristics of the... | 11/07/2006 |
| 7116734 | Method and system for providing maximum likelihood detection with decision feedback interference cancellation A method for providing maximum likelihood detection with decision feedback interference cancellation is provided. The method includes estimating a current symbol with previous symbol interference (PSI) removed based on estimated previous symbols. A next symbol is es... | 10/03/2006 |
| 7023265 | Equalizing method in receivers using a combination of multiple carrier and code division multiple access modulating techniques The invention concerns a method for receiving a signal using a multiple carrier and code division multiple access modulation, comprising a demodulating step by application of a mathematical transform of the temporal domain to the frequency domain, a step which consi... | 04/04/2006 |
| 6998908 | Adaptive interference cancellation receiving system using synthesizer phase accumulation An adaptive interference cancellation receiving system uses synthesizer phase accumulation. A coupler coupled to a transmitter samples an undesired transmit signal. An adaptive interference canceller (AIC) module varies phase and amplitude of the sampled undesired t... | 02/14/2006 |
| 6985029 | Circuit configuration for tolerance correction in a frequency demodulator A demodulator has a resistor and a capacitor that may be subject to tolerances. For tolerance correction, the FM demodulator is preferably supplied with a reference frequency, which corresponds to the nominal mid-frequency of the demodulator, which is a function of ... | 01/10/2006 |
| 6980785 | Direct conversion wireless receiver with digital phase equalization A direct conversion receiver (DCR) with a pair of quadrature conversion paths. Each of the quadrature conversion paths receives an RF input signal and converts the RF input signal to a digital baseband signal. The quadrature conversion paths each include a mixer mix... | 12/27/2005 |
| 6972617 | FM demodulator including a DC offset detector An FM demodulator has a differential output demodulator for receiving an FM signal and for outputting a positive differential signal and a negative differential signal of a demodulated signal of the FM signal, a DC offset detector electrically connected to the diffe... | 12/06/2005 |
| 6862440 | Method and system for multiple channel wireless transmitter and receiver phase and amplitude calibration The present invention provides a method and system for estimating common amplitude and phase errors of a multiple channel wireless system. The multiple channel wireless system includes a plurality of transmission channels formed between a plurality of transmission a... | 03/01/2005 |
| 6822508 | Communication device, communication method, program, and storage medium A high-performance demodulator for use in UWB (Ultra WideBand) multiple-access communication is disclosed. In a communication device, the correlation between a received signal corresponding to signals transmitted from a plurality of communication terminals by means ... | 11/23/2004 |
| 6751264 | Receiver and method therefor Embodiments of the present invention relate generally to receivers. One embodiment relates to a digital FM receiver having multiple sensors (e.g. antennas). In one embodiment, the digital receiver includes a baseband unit having a channel processing unit. In one emb... | 06/15/2004 |
| 6735264 | Compensation for non-linear distortion in a modem receiver A method and modem for communicating serial input data over a transmission link are disclosed. Serial input data is partitioned into parallel data elements prior to rotation by an invertible linear mapping. Computationally efficient multi-rate wavelet filter banks a... | 05/11/2004 |
| 6731704 | Apparatus and bit-shift method for eliminating interference of cross polarization In a cross polarization interference eliminating apparatus, a signal demodulating section receives a first signal resulting from one of radio signals, which are transmitted in a modulated, decoded and equalized form from respectively using two kinds of polarized pla... | 05/04/2004 |
| 6664849 | Digital FM demodulator performing amplitude compensation A digital FM demodulator converts a digital FM input signal to a demodulated signal, detects the amplitude of the digital FM input signal, generates a corresponding amplitude signal, and adjusts the amplitude of the demodulated signal according to the amp... | 12/16/2003 |
| 6590932 | Methods, receiver devices and systems for whitening a signal disturbance in a communication signal Methods, systems and receiver devices are provided which may reduce the average power of a signal disturbance by whitening the signal disturbance. In one aspect, a finite impulse response filter (FIR) is provided which whitens the signal disturbance by fi... | 07/08/2003 |
| 6400774 | Nonlinearity-caused distortion compensating system A radio transmitter has a quadrature modulating portion and an RF power amplifier. The RF power amplifier follows the quadrature modulating portion. A nonlinearity-caused distortion compensating system provided in the radio transmitter includes a power ca... | 06/04/2002 |
| 6400778 | DC-offset canceller A DC-offset canceller in a receiver of a communication system using a burst signal including a training sequence with a predetermined periodicity at the head thereof is disclosed. In the canceller, a quadrature demodulator 112 converts the received burst ... | 06/04/2002 |
| 6370205 | Method and apparatus for performing DC-offset compensation in a radio receiver In order to increase accuracy of DC-offset compensation within radio receivers and to ensure that such compensation does not erode the dynamics of the decoders located within the receivers, the present invention separately performs mean value estimation a... | 04/09/2002 |
| 6148047 | DC offset compensation for zero if quadrature demodulator The present invention provides dc offset compensation circuit (800) for a zero IF FM quadrature demodulator in an AMPS cellular mobile telephone system. A frequency offset is introduced to remove modulation inherent dc components from supervisory audio to... | 11/14/2000 |
| 5930310 | Interference reduction scheme and method This invention relates to telecommunications systems. The present invention provides a system and method operable to the cancel interference from digital subscriber line systems. A data signal demodulator having first and second inputs arranged to receive... | 07/27/1999 |
| 5778310 | Co-channel interference reduction Co-channel interference of a frequency modulated signal represented by complex signal samples is reduced by amplitude limiting each sample and non-linearly filtering the limited samples. The non-linear filter low pass filters the limited samples, multipli... | 07/07/1998 |
| 5754601 | Jitter circuit for reduced switching noise A circuit for reducing switching noise caused by harmonics of an output coupled to a band of interest in a mixed signal communication device, with the mixed signal communication device having a predetermined sampling clock. The circuit comprises a bandpas... | 05/19/1998 |
| 5742200 | Environmentally rugged optical sensor with improved noise cancellation A noise cancellation system which balances the photocurrents derived by a measurement signal and a reference signal of a sensor. The invention has application in any measurement device which detects a small signal in combination with high noise content an... | 04/21/1998 |
| 5617451 | Direct-conversion receiver for digital-modulation signal with signal strength detection A direct-conversion receiver includes a direct-conversion demodulator. A first device detects a strength of a received signal. A clock signal generator outputs a clock signal in response to a reception start signal. The clock signal has a frequency corres... | 04/01/1997 |
| 5608762 | Apparatus and method for automatic discriminator compensation in a FSK receiver A portion of a FSK signal is encoded with a central frequency (f0) and the FSK signal is transmitted. A receiver captures the transmitted FSK signal, and demodulates the FSK signal to provide and analog data signal. The analog data signal is DC... | 03/04/1997 |
| 5541959 | Method and apparatus for the cancellation of interference in electrical systems Method and apparatus for cancelling in-band interference in real time. A cancellation circuit is provided where one demodulator circuit provides a demodulated output having interference voltage owing to interference between carrier signals, between a carr... | 07/30/1996 |
| 5535248 | Digital radio communication system A digital radio communication system includes a first demodulator, a second demodulator, a non-break switch, and a switching controller. The first demodulator receives a signal from a first antenna and outputs demodulated data and a line quality degradati... | 07/09/1996 |
| 5461339 | Apparatus for processing frequency modulated signals A simplified apparatus for processing frequency modulated signals is disclosed which is equipped with a frequency characteristic correction function and an inversion prevention function. An input signal is processed with different parameters within a cosi... | 10/24/1995 |
| 5440269 | Digital FM demodulator having an address circuit for a lookup table In a digital frequency demodulator, data representing the input signal to be demodulated is prestored in a look-up table and signal processing is digitally performed to generate a read address required for reading out the data stored in the look-up table ... | 08/08/1995 |
