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| Number | Title | Issue Date |
| 8093943 | Phase noise correction device and its method A phase noise correction device having a function for accurately detecting a phase noise component and capable of reducing a load on a reception device is provided. A phase noise correction device for correcting a phase noise generated in a local oscillator includes... | 01/10/2012 |
| 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 |
| 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 |
| 7187291 | Control system and method for remote launchers A remotely controlled device (3) for controlling a remotely controlled launcher for dog training includes receiving circuitry (26,27) for receiving control information signals from a remote transmitter (2), controller (40) coupled to rece... | 03/06/2007 |
| 7138858 | Apparatus and methods for output buffer circuitry with constant output power in radio-frequency circuitry A buffer circuitry buffers a radio-frequency (RF) signal. The buffer circuitry includes a complementary pair of switches and a power source. The a complementary pair of switches has an input terminal and output terminal. The input terminal of the complementary pair ... | 11/21/2006 |
| 7127217 | On-chip calibration signal generation for tunable filters for RF communications and associated methods On-chip calibration signal generation circuitry is disclosed for filter tuning for radio-frequency communications and associated methods. On-chip circuitry generates a calibration signal that is used to help set a tuning control signal that is received by a tunable ... | 10/24/2006 |
| 7119834 | Receiver and system calibration system and method Systems and methods which implement calibration for signal errors in a communication network, such as non-uniform frequency response, are disclosed. According to a preferred embodiment of the invention, a calibration signal is communicated through the network and a ... | 10/10/2006 |
| 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 |
| 7046744 | Method and apparatus for frequency offset estimation, and system utilizing same A direct current (DC) offset estimation, frequency offset estimation, and compensation system (200), receives data packet (204) with preamble (206). A DC offset estimator (210) and a frequency offset estimator (212) operate concurr... | 05/16/2006 |
| 7035349 | Signal compensation circuit and demodulating circuit with high-speed and low-speed feedback loops A signal compensation circuit compensates for direct-current offset of an input signal by amplifying the input signal with an amplifier having a variable direct-current offset. A low-speed negative feedback loop charges and discharges a capacitor in an integrating c... | 04/25/2006 |
| 7031685 | Receiver for regenerating a signal wave via digital signal processing Detection output from a detection circuit 17 is converted to digital detection data D1 and supplied to an AGC circuit AGCC and a noise clamping circuit NCC that are formed by digital circuits. In the AGC circuit AGCC, a digital low pass filter 19 | 04/18/2006 |
| 7020224 | Ultra-wideband correlating receiver A receiver for ultra-wideband communications is provided. One feature of the receiver architecture is that includes only a single correlator. The receiver may be used in wireless and wire communication mediums. The single correlator may be used to update a locally g... | 03/28/2006 |
| 6993305 | AM receiver with audio filtering means An AM receiver includes an audio filter that is configured to selectively narrow the audio bandwidth of the demodulated signal when a signal with a low signal-to-noise ratio is received. By suitably bandpass-filtering the signal, for example, to 200–5000 Hertz, th... | 01/31/2006 |
| 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 |
| 6977545 | FM signal receiver and wireless communications device using same An FM signal receiver for use in receiving a burst signals as in a Bluetooth system includes a BPF and a frequency-demodulation circuit, each having, for example, a phase shifter, which is constructed from similar or related circuitry so as to enable adjustment of t... | 12/20/2005 |
| 6950479 | DC offset compensation A method of estimating a DC offset value of a signal includes estimating a DC offset value of a preamble part of the signal using a pair of diodes (D1, D2) and a resistor (R) connected in parallel. During receipt of the data part of the signal, the dio... | 09/27/2005 |
| 6931051 | Frequency hopping wireless communication system with filtered adaptive slicer A wireless communication network comprising a wireless receiver. The wireless receiver comprises at least a first antenna for receiving packets, wherein each of the received packets comprises a plurality of bits and each of the plurality of bits is modulated by a fr... | 08/16/2005 |
| 6903617 | Method and apparatus for synthesizing high-frequency signals for wireless communications A semiconductor package includes a package substrate and an integrated circuit. The package substrate has a first surface. The integrated circuit couples electrically to the first surface of the package substrate. The integrated circuit and the package substrate tog... | 06/07/2005 |
| 6850113 | Demodulator and communication device using the same A demodulator includes a reference signal generator for generating a reference signal, an FM demodulation circuit for demodulating a modulated signal, and a control circuit for controlling demodulation sensitivity of the FM demodulation circuit. The control circuit ... | 02/01/2005 |
| 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 |
| 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 |
| 6677816 | Circuit arrangement for demodulating signals In a circuit arrangement for demodulating signals, particularly frequency-modulated signals, in which a limiter, to whose input the signals to be modulated can be applied, is followed by a demodulator from whose output the demodulated signals can be deriv... | 01/13/2004 |
| 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 |
| 6295015 | Reference generator for demodulator calibration A reference generator includes a memory that stores reference data which, when clocked out of the memory, produces an ATSC compliant VSB reference signal substantially free of sub-harmonics of the clock signal. A digital-to-analog converter converts the c... | 09/25/2001 |
| 6188275 | Demodulator tuned by use of a test signal A demodulator circuit for demodulating a frequency modulated input signal includes a filter (12) for receiving an incoming input signal and for providing a filtered output signal, a detector (16) for receiving the filtered output signal, and for producing... | 02/13/2001 |
| 6166594 | Self calibrating demodulator system A reference signal source produces a substantially distortion free reference signal which is supplied to a demodulator that is arranged to demodulate the substantially distortion free reference signal. A calibration filter and an equalizer are included do... | 12/26/2000 |
| 6160444 | Demodulation of FM audio carrier A method of demodulating an FM carrier wave and an FM demodulation circuit are described which use a phase locked loop. The phase locked loop is tuned to a selected carrier wave frequency including the step of selecting a setting of the variable gain circ... | 12/12/2000 |
| 6104238 | FM demodulator including tuning of a filter and detector An FM demodulator circuit includes a filter (10) and a detector (14) for receiving a frequency modulated input signal and for providing a demodulated output signal. A tuning circuit (19) is provided for tuning the frequency characteristics of the filter a... | 08/15/2000 |
| 6009126 | Zero-IF receiver Known is a zero intermediate frequency receiver or zero-IF receiver in which DC-offset correction is done in the I- and Q-paths, after mixing down of the received RF-signal or of an IF-signal. Such a DC-offset correction is not sufficient for high gain I-... | 12/28/1999 |
| 5966400 | Receiver Receiver having an RF input for applying an RF input carrier-modulated modulation signal thereto, which receiver is coupled to a multiplier circuit and to a phase-locked loop (PLL) with a signal path incorporating a phase detector, a loop filter, a first ... | 10/12/1999 |
| 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 |
| 5691666 | Full threshold FM deviation compression feedback demodulator and method A FM (Frequency Modulated) DCFB (Deviation Compression Feedback) signal demodulator can be achieved by utilizing FM deviation compression feedback techniques. An FM signal is coupled to a mixer (10) wherein a signal from a local oscillator is mixed with t... | 11/25/1997 |
| 5631601 | FM demodulation with a variable gain phase locked loop A method of demodulating an FM carrier wave and an FM demodulation circuit are described which use a phase locked loop. An FM input signal including the carrier wave is supplied to a phase detector in the phase locked loop. The output of the phase detecto... | 05/20/1997 |
| 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 |
| 5572164 | FM demodulator with threshold extension and receiver comprising such an FM demodulator An FM demodulator having two input terminals (11, 12), to which FM input signals having 90° phase relation are applied, the said FM demodulator including a phase comparator (1) and a tunable, phase shifting circuit (2), the phase shifting circuit (2) bei... | 11/05/1996 |
| 5539779 | Automatic offset control circuit for digital receiver An automatic offset control circuit comprises a differential output preamplifier having an offset adjustment function, further comprising an average detector, a peak detector, and a differential input amplifier. The average detector generates a reference ... | 07/23/1996 |
| 5500627 | Precision duty cycle phase lock loop An up/down counter within a phase locked loop is gated to count high frequency clock pulses during the first cycle of the input signal. Upon detection of a transition in the input signal indicating the end of the first cycle, the direction of the count is... | 03/19/1996 |
| 5455536 | Demodulator circuit and demodulating method employing bit error rate monitor A demodulator circuit and a demodulating method are disclosed. A demodulator including a phase-locked loop for a receive carrier recovery or a phase lock recovery demodulates an input received signal and a band of a loop filter of the phase-locked loop is... | 10/03/1995 |
| 5450033 | Frequency demodulation circuit A frequency demodulation circuit having an improved detection sensitivity is provided by forming an all-pass equalizer in a Quadrature-type demodulator capable of allowing a band covering at least a carrier frequency deviation to pass therethrough. The eq... | 09/12/1995 |
