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8184742 |
RF receiver having timing offset recovery function and timing offset recovery method using thereof
A preprocessing unit samples and digitalizes analog signal. A differential operation unit delays digitalized signal for a predetermined period and differentiates delayed signals. A correlation unit...
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8181058 |
Clock-data-recovery technique for high-speed links
A receiver circuit is described. In the receiver circuit, an analog-to-digital converter (ADC) generates first samples of a data signal based on a first clock signal, and a clock-data-recovery...
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8170148 |
Demodulation circuit, digital microwave system and demodulation method
A demodulation circuit, a digital microwave system including the demodulation circuit, and a signal demodulation method are provided. The demodulation circuit includes a first circuit, a second...
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8165194 |
Space-time encoding method for a multi-antenna communication system of the UWB pulse type
The present invention relates to a space-time coding method for a UWB transmission system comprising at least two radiated elements. This method codes a block of information symbols S=(a1, a2 . . ....
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8165193 |
Method for wireless data transmission between a base station and a passive transponder, as well as a passive transponder
A method for wireless data transmission, in, for example, RFID systems, between a base station and a passive transponder, as well as a passive transponder is provided by inductive coupling, as well...
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8144761 |
Pulse transmission method, pulse transmission system, transmitter, and receiver
A pulse transmission method for transmitting data by using pulse signals, each having a predetermined pulse width; defining a symbol time at least N times the predetermined pulse width, N being at...
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8125287 |
Extendable N-channel digital pulse-width/pulse-frequency modulator
A multichannel digital pulse width modulator/digital pulse frequency modulator uses a single ring oscillator that is shared by multiple channels. The ring oscillator has taps that can be used for...
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8121201 |
Pulse transmitter, pulse receiver, pulse transmitting method, and pulse demodulating method
A pulse transmitter having a relatively simple structure and generating a pulse modulating signal even at a high transmission rate. In the pulse transmitter, a symbol pulse generating part (103)...
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8116385 |
Method for the transmission of a data word
A method for transmitting a data word, according to which a codeword supply (CV) is provided, the number of individual codewords (C1 . . . C31) of the supply corresponding at least to the number of...
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8111783 |
Capturing and using radio events
In one embodiment a method includes, collecting in-phase/quadrature (I/Q) data representing energy detected by a radio in a frequency band, performing a fast Fourier transform (FFT) on the I/Q data...
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8085106 |
Method and apparatus for dynamic modulation
Circuits and methods of dynamic modulation are disclosed. A dynamic modulator is used to reduce measurable conducted and/or radiated electromagnetic interference (EMI). The dynamic modulator is...
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8081882 |
Optical high-rate pulse position modulation scheme and optical communications system based thereon
It is an object of the present invention to provide a communications system for communication between two remote terminals, where even at very long distances between these two terminals and/or at...
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8077768 |
Digital signal processing apparatus
A digital signal processing apparatus for converting an analog signal to a digital signal and digitally processing the digital signal is disclosed. The apparatus includes a modulation part for...
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8073077 |
Reception quality calculation method, reception quality calculation apparatus, and communication apparatus
In a communication apparatus which transmits parameters corresponding to a reception environment to a transmitting apparatus which switches the transmission rate based on the reception environment,...
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8072283 |
Signal modulation for switched mode power amplifiers
In a device (10) for modulating Cartesian base band signals (I, Q) a first and second mapping unit (12, 14) each map signal samples of a corresponding Cartesian signal (I, Q) to intermediary signal...
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8072873 |
Adaptive coding and modulation using linked list data structures
A process is described to build physical layer frames with a modcode adapted to the signal quality of a destination terminal. Data packets assigned to the same modcode may be sent in the same...
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8070108 |
Signaling and remote control train operation
A model train and layout control system based on on-board sound and locomotive modules, new signaling methods, bi-directional communication, environmental sound, turnout control, train location...
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8059709 |
Space-time coding/decoding method for a dual-antenna pulse UWB communication system
This invention relates to a space-time coding method for a UWB transmission system comprising two radiation elements. This method codes a block of information symbols (S=(a1,a2,a3,a4)) belonging to...
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8059766 |
Communications device and related method with reduced false detects during start of message bit correlation
A communications device includes a signal input for receiving signals such as a binary phase shift keyed (BPSK) communications signal having a repeated preamble bit or symbol pattern. A modem...
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8059767 |
Communications device and related method that detects symbol timing
A communications device includes a signal input for receiving signals such as a binary phase shift keyed (BPSK) communications signal having a repeated preamble bit or symbol pattern. A modem...
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8059710 |
Space-time coding method for a multi-antenna system of the UWB pulse type
A space-time coding method for a UWB transmission system comprising at least two radiated elements. The method codes a block of information symbols S=(a1, a2 . . . , ap,)) belonging to an M-PPM...
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8054920 |
Communications device and related method with improved acquisition estimates of frequency offset and phase error
A repeated preamble bit or symbol pattern such as for a binary phase shift keyed (BPSK) communications signal is received within a modem. An initial frequency offset and phase error estimate is...
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8044744 |
Time modulation with cosine function
A method and apparatus is described for a time modulated signal. A cosine function is used as the basis for the signal with time intervals at the maximum and minimum values of the cosine function...
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8045930 |
Tag frequency control
A communication system comprising one or more transceiver units of a first type and one or more transceiver units of a second type capable of communicating with the transceiver units of the first...
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8036315 |
Multiple signal receiving
Presently disclosed are a multichannel receiver and a method of operating it. The multichannel receiver includes a first channel circuit of N channel circuits. The first channel circuit includes a...
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7986729 |
High bandwidth data transport system
The present invention provides for a methods, system, and apparatus relating to data transmission. One method of the present invention includes representing data using at least one ultra wideband...
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7983146 |
Method for communications using a communication protocol
A method, system and type of database for transmitting data is disclosed in which the data is organized into a structured linear database. The structured linear database includes a routing header...
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7983334 |
Noncoherent UWB cooperative communications system
A method between terminals in a cooperative UWB pulse telecommunications system including a source terminal, a relay terminal, and a recipient terminal, the method including: transmitting, at the...
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7974361 |
Incoherent type mimo UWB communication system
This invention relates to a space-time coding process for a pulse type MIMO-UWB system using symbols belonging to a PPM modulation alphabet. Orthogonality of signals emitted by the different...
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7970047 |
UWB channel estimation using new generating TR transceivers
The present invention presents a simple and novel channel estimation scheme for UWB communication systems. As disclosed herein, the present invention maximizes the extraction of information by...
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7957464 |
Digital signal receiver
A digital signal receiver including: a signal edge detector configured to receive a signal including a code and detect an edge of the signal; a reference point detector configured to detect a...
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7953146 |
Method for wireless data transmission between a base station and a transponder via inductive coupling
A method and transponder for wireless data transmission between a base station and a transponder is provided by means of inductive coupling, the transponder supports a first data transmission...
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7940841 |
Modulating circuit, transmitting apparatus using the same, receiving apparatus and communication system
A communication system includes a modulating circuit to increase the amount of information to be transmitted, a transmitting apparatus capable of easily generating a desired waveform even for any...
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7933307 |
Multiple-input multiple-output ultra-wide band communication method and device using hermite pulses
A method of sending ultra-wide band signals via a plurality of sending antennas includes a phase for sending training sequences followed by a phase for sending data after which each antenna of the...
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7912143 |
Biphase multiple level communications
A novel data transmission method and apparatus is disclosed for communicating digital data using existing telephone wiring. According to the present invention, the digital data is represented by...
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7904045 |
Phase detector comprising a switch configured to select a phase offset closest to a phase of an amplifier
A phase detector includes a plurality of phase detectors located in a phase correction loop, each phase detector configured to receive as input a radio frequency (RF) input signal and an RF...
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7889054 |
Method and apparatus for creating scramble signals in RFID
The disclosed inventions relate to a method and apparatus for creating scramble signals. The disclosed inventions further relate to a method and apparatus for creating scramble signals from data...
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7889823 |
Timing recovery in a parallel channel communication system
A parallel channel timing recovery circuit. The parallel timing recovery circuit comprises multiple prefilters receiving parallel channel outputs and providing prefilter outputs. Multiple sampling...
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7885326 |
Method for determining a pulse position in a signal
A method is presented for determining an actual pulse position in a signal. This signal comprises a plurality of successive frames, wherein each frame has length L and contains one pulse with width...
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7853205 |
Methods for improving transmission efficiency of control channels in communication systems
Embodiments of the invention provide methods for optimizing the spectral efficiency of control channel transmissions carrying scheduling assignments from a serving Node B to user equipments. This...
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7852912 |
Direct determination equalizer system
A direct determination equalizer system (“DDES”) for compensating for the deterministic effects of a transmission channel and a data source is disclosed. The DDES may include an equalizer hav...
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7848434 |
Channel estimator and related method for smoothing channel responses of a multi-carrier system
A channel estimator and a related method for smoothing channel responses of a multi-carrier system. The channel estimator includes a channel response computing circuit for computing at least one of...
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7843992 |
Global instruction broadcasting for pulse-position modulated data transmission
In one embodiment, a circuit is provided that includes: an impulse generator operable to provide a pulse train; a pulse position modulator having a splitting junction configured to receive the...
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7830989 |
Ultra wideband impulse radar
In one embodiment, a wafer scale radar antenna module (WSAM) is provided that includes: a substrate; a plurality of antennas adjacent the substrate; an RF feed network adjacent the substrate, the...
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7822388 |
Transceiver, modulation integrated circuit, and RFID reader/writer
In a transceiver that selectively transmits a modulated wave and a non-modulated wave to the outside, and receives a response signal from the outside, an S/N ratio during reception is improved. A...
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7817715 |
Space-time coding method for a UWB pulse-type multi-antenna system
This invention relates to a space-time coding method for a UWB transmission system including three or four radiative elements. It also relates to a method for transmitting a plurality of data...
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7814342 |
System and method for communication using an AC signal from a powered device
A system and method for communicating information using Layer 1 from a powered device to power source equipment via Ethernet. In one embodiment, Layer 1 information such as power management,...
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7804917 |
Clear channel assessment method and system for ultra wideband OFDM
An ultra-wideband clear channel assessment system uses a double-window energy technique for energy detection, which indicates a clear or busy channel.
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RE41739 |
Synchronization/reference pulse-based powerline pulse position modulated communication system
A transmitting controller is connected to a powerline and on command places a reference signal and a series of signal pulses in the powerline at a series of signal timing positions related to zero...
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7801020 |
Mobile channel estimation algorithm for DVB-H COFDM demodulator
A mobile channel estimation algorithm is disclosed, for use in a DVB-H coded OFDM demodulator. The mobile channel estimation algorithm estimates the mobile channel transfer function, overcoming...
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