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Class 375/324 - Particular demodulator


Subclass of Class 375 - Pulse or digital communications
Definition: Subject matter including a specified type of circuit for
No. of patents: 942
Last issue date: 05/29/2012


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NumberTitleIssue Date
7120210Method and system for processing a signal
A clipped metric function is utilized to mitigate the adverse effects of impulsive noise (e.g., lightening, motor vehicle ignition noise) on communications signals. The clipped metric function may be used alone or in conjunction with conventional signal clipping. In...
10/10/2006
7119607Apparatus and method for resonance reduction
A system is provided that includes a power distribution network to provide a switching current and a resonance reduction circuit to sense the switching current within a frequency range and to generate a resonance reduction signal having a current component at substa...
10/10/2006
7119727Analog-to-digital converter
A system and method for implementing an analog-to-digital converter (ADC). The ADC includes a converter for generating a timed pulse based on an analog signal and a control signal. The ADC also includes a timing analyzer for generating a digital signal based on the ...
10/10/2006
7120208Device and method for adjusting input gain for multiple signal formats in a data network
A network receiver is configured for receiving a modulated carrier signal from another network transceiver via a network medium, the modulated carrier signal may be either a pulse position modulated (PPM) carrier or a quadrature amplitude modulated (QAM) carrier. Th...
10/10/2006
7120415Radio receiver
A radio receiver is configurable to operate in both low-IF and zero-IF modes with maximum re-use of of analogue and digital circuitry between modes. The receiver comprises a quadrature down-converter (108,110,112,114) for generating in-phase (I) and quadratur...
10/10/2006
7116963Simplified high frequency tuner and tuning method
A disclosed method tunes a signal from a channelized spectrum having a predetermined channel spacing. A signal of interest having a predetermined maximum bandwidth is mixed with a local oscillator signal, which has a frequency that is an integer multiple of the chan...
10/03/2006
7116964Signal reception and processing method for cordless communications systems
Channel selection of a received signal is first of all carried out, in the process, by way of an analog channel selection filter. The signal is then converted to a digital discrete-time and discrete-value signal. Finally, the continuous-time and continuous-value sig...
10/03/2006
7116729Trimming of local oscillation in an integrated circuit radio
A method and apparatus for trimming of a local oscillation within a radio frequency integrated circuit (RFIC) includes processing that begins when an RFIC receives a radio frequency (RF) signal having a known frequency. The processing then continues when the RFIC mi...
10/03/2006
7116730Demodulation apparatus
A demodulation apparatus includes an A/D converter for sampling and quantizing a baseband signal, and a demultiplexer for multiple-separating output signals of the A/D converter into two outputs. A first branch unit splits one of the two outputs of the demultiplexer...
10/03/2006
7116728Quadrature alignment in communications receivers using dual delay lines
The present invention, generally speaking, takes advantage of the properties of quadrature signals to achieve precise quadrature alignment in a simple fashion. In particular, the expectation of the product of quadrature signals is zero. In accordance with the teachi...
10/03/2006
7116742Timing recovery system for a multi-pair gigabit transceiver
A method and a timing recovery system for generating a set of clock signals in a system which includes a set of subsystems. Each of the subsystems includes an analog section. The set of clock signals includes a set of sampling clock signals. Each of the analog secti...
10/03/2006
7116953Local oscillator using I/Q mismatch compensating circuit through LO path receiver using thereof
A local oscillator provides an in-phase local oscillating signal and quadrature-phase signal to first and second mixers outputting an input signal with a mixed in-phase local oscillating signal and quadrature-phase local oscillating signal, respectively. The oscilla...
10/03/2006
7116961Image rejection quadratic filter
An image rejection quadratic filter is tunable to filter image frequencies over a wide band. In one embodiment, the image rejection filter includes in-phase and quadrature phase mixers. The image rejection has a fractional transfer function. The image rejection filt...
10/03/2006
7113552Phase sampling techniques using amplitude bits for digital receivers
The present invention uses at least one amplitude bit to assist the phase-sampling technique used in digital receiver architectures. For digital receivers where the Intermediate Frequency (IF) is an integer multiple of the fundamental frequency fo, the pr...
09/26/2006
7110476Demodulation and modulation circuit and demodulation and modulation method
A demodulation circuit and a demodulation method can optimize sampling timing with achieving reduction of power consumption. A preliminarily known signal is inserted in the digital transmission signal upon transmission. The demodulation circuit includes A/D converti...
09/19/2006
7110472Transmission method, transmitter and receiver
A receiver for generating a transmission symbol stream by applying predetermined modulation processing to an encoded bit series obtained by encoding an information bit series having a predetermined transmission rate. The receiver generates a transmission-information...
09/19/2006
7110448ZF-based adaptive asynchronous receiver
The invention concerns an asynchronous receiver for digital transmission and recording systems. The receiver comprises a sampling rate converter (SRC) for timing recovery, preceded by a digital adaptive equalizer operating at the sampling rate 1/Ts, asynchronous to ...
09/19/2006
7110474Method for determining a boundary of an information element, a system, and an electronic device
A method for determining a boundary of an information element, in which a repetition coded signal transmitted by satellites is received, which signal is modulated with information elements. A group of symbols forms one information element. A group of reference value...
09/19/2006
7110435Spread spectrum applications of universal frequency translation
Frequency translation and spread spectrum applications of same are described herein. Such applications include, but are not limited to, unified down-conversion and de-spreading, unified up-conversion and spreading, RAKE receivers utilizing unified down-conversion an...
09/19/2006
7110444Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments and circuit implementations
Frequency translation and applications of the same are described herein, including RF modem and wireless local area network (WLAN) applications. In embodiments, the WLAN invention includes an antenna, an LNA/PA module, a receiver, a transmitter, a control signal gen...
09/19/2006
7109787High-efficiency circuit for demodulating carriers in quadrature
A demodulation circuit for demodulating a received signal including carriers in quadrature modulated by digital signals and/or in which the processing is performed on two carriers in quadrature. The circuit includes a demodulator, an analog-to-digital converter, a c...
09/19/2006
7107036Demodulator architecture and associated methods
Embodiments of a frequency modulated (FM) demodulator and associated methods are generally described. According to but one example embodiment, an apparatus is disclosed comprising a receiver front-end, to receive a signal from one or more antenna(e) and generate qua...
09/12/2006
7103110Dual phase pulse modulation encoder circuit
An dual phase pulse modulation (DPPM) encoder circuit converts data into a series of high and low signal pulses, each of whose time durations or pulse widths represents a group of M data bits, with the alternating high and low pulses representing successive groups. ...
09/05/2006
7103118Vectorial combiner for diversity reception in RF tranceivers
A combiner for use in a diversity radio receiver (FM) which receives a plurality of diversity I and Q modulated signals each carrying I and Q information signals through spatially separated antennas, the received I and Q signal pairs being digitized at a sampling ra...
09/05/2006
7103332Apparatus and method for compensating for frequency offset in a mobile communication system
An apparatus and method for compensating for the frequency offset of a received signal in a receiving apparatus of a mobile communication system. In the present invention, a sine component is calculated by adding I and Q channel signals resulting from downconverting...
09/05/2006
7102465Frequency discrete LC filter bank
An inductive (“L”)-capacitive (“C”) filter bank has application for use in a television receiver. The LC filter includes inductors configured in at least one inductive (“L”) bank, and capacitors configured in at least one capacitive (“C”) bank. The i...
09/05/2006
7103098Adaptive receiver for multiplex/multi-access communications
A received communication signal in which input data has been differentially encoded using a number of nominal symbols is filtered according to variable filter coefficients. A symbol is predicted based on the filtered signal, as if the input data had been encoded non...
09/05/2006
7099630Beam forming method
A radio communications system has subscriber stations and a base station that is provided with an antenna system with a plurality of antenna elements that emit a downlink signal in a weighted manner with coefficients of a weighting vector. In order to form a beam, a...
08/29/2006
7098828Complex band-pass ΔΣ AD modulator for use in AD converter circuit
A complex band-pass ΔΣ AD modulator is provided with a subtracter device, a complex band-pass filter, first and second AD converters, and first and second DA converters. The first and second DA converters and first and second logic circuits are sandwiched by first...
08/29/2006
7096041Beam forming method
In a radio communication system, a beam is formed between subscriber stations and a base station which has an antenna device with several antenna elements. The antenna elements emit a downlink signal based on respective weighing with coefficients of a weighting vect...
08/22/2006
7095801Phase adjustable polyphase filters
A polyphase filter for wireless communication systems includes at least two phase splitting filters each having a variable resistance across their respective outputs. The variable resistance can take any suitable form, such as a MOS transistor biased in the linear (...
08/22/2006
7095804Method and apparatus for spread spectrum radio signal recovery in wideband spread spectrum communication systems
Systems and methods to recover spread spectrum radio signals are provided. A representative system includes an antenna, a radio frequency subsystem, a baseband subsystem, and at least one peripheral device. The radio frequency subsystem is coupled to the antenna and...
08/22/2006
7095809Practical M-ary demodulator using hard decision circuit and method of operation for use in a CDMA wireless network base station
A demodulator for demodulating S possible orthogonal modulation codes received serially as binary data, wherein each of the S possible orthogonal modulation codes comprises M binary bits representing an N-bit data symbol and wherein M=2N. The demodulator ...
08/22/2006
7095810Practical M-ary demodulator and method of operation for use in a CDMA wireless network base station
A demodulator for demodulating S orthogonal modulation codes, each code comprising M binary bits representing an N-bit data symbol, where M=2N. The demodulator comprises a Logic 00 detector for comparing pairs of binary bits to 00 and outputting [+1,+1] i...
08/22/2006
7092474Linear phase detector for high-speed clock and data recovery
Methods and apparatus for recovering a clock and data from a data signal. A method provides for receiving a clock signal having a first clock frequency and alternating between a first level and a second level, and receiving a data signal having a first data rate, th...
08/15/2006
7092457Adaptive iterative detection
A system for estimating inputs and outputs of a digital transmission system is disclosed. The system includes a receiver front-end configured to receive an observed digital signal in the digital transmission system. The system further includes forward and backward r...
08/15/2006
7092467Method for estimating symbol timing in feed-forward manner
A receiving system for estimating symbol timing in a feed-forward manner comprises: a matched filter for receiving baseband signals and dividing them into real and imaginary numbers; a symbol timing estimator for receiving signals from the matched filter and estimat...
08/15/2006
7088788Communication device and digital encoding method thereof
The present invention provides a communication device and a digital encoding method thereof. The communication device comprises a first and a second emitting devices respectively communicating at a first and a second communication channels. Each emitting device emit...
08/08/2006
7088202Methods and apparatus for an improved discrete LC filter
A discrete inductive-capacitive (LC) filter selects between at least two inductor banks to tune the LC filter. The filter receives an input signal that includes one or more bands of frequencies. A control signal selects a band of frequencies for processing. A first ...
08/08/2006
7088763Digital demodulation
A digital demodulator includes a mixing section, 1st and 2nd digital comb filters, phase locked loop module, and a data recovery module. The mixing section is operably coupled to produce a digital I signal and a digital Q signal from a digital ...
08/08/2006
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