Matches 101 - 150 out of 345 < 1 2 3 4 5 6 7 >
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6760373 Systems and methods for multicarrier modulation using multi-tap frequency-domain equalizer and decision feedback  
Through the use of feedback in determining frequency domain equalization, intersymbol interference can be reduced. Specifically, the determined constellation point closest to the determined...
6734784 Zero crossing based powerline pulse position modulated communication system  
A transmitting controller is connected to an AC powerline and on command places a series of signal pulse in the powerline in a series of signal timing windows related to zero voltage crossing...
6700931 Method, system and apparatus for initiating and maintaining synchronization of a pulse position modulation (PPM) decoder with a received PPM signal  
A radio frequency identification (RFID) tag device having a pulse position modulation (PPM) decoder circuit which calculates a relative frequency relationship between an internal clock-oscillator...
6687293 Method, system and apparatus for calibrating a pulse position modulation (PPM) decoder to a PPM signal  
A radio frequency identification (RFID) tag device having a pulse position modulation (PPM) decoder circuit which calculates a relative frequency relationship between an internal oscillator of the...
6671316 Three state pulse width modulation code  
A DC balanced, single bit manipulation method and system for encoding a serial data stream having a plurality of low and high bits includes generating a pulse stream. The serial data stream is to...
6658068 Detection of EFM stream component widths  
Method and system for determining varying widths of each of a sequence of signal components (marks and spaces) in an incoming digital signal stream and for indicating which mark widths and which...
6653968 System for generating a signal to superimpose information  
A system for generating a signal which, in addition to first information representing the rotational speed of a rotating part, contains at least second information. The signal changes over time...
6636566 Method and apparatus for specifying pulse characteristics using a code that satisfies predefined criteria  
A coding method for a pulse transmission system specifies temporal and/or non-temporal pulse characteristics according to temporal and/or non-temporal characteristic value layouts having one or...
6636567 Method of specifying non-allowable pulse characteristics  
A code specifies characteristics of pulses transmitted and received by an impulse transmission system. The invention provides methods for defining non-allowable regions within pulse characteristic...
6633607 Semiconductor device having a plurality of semiconductor chips connected together by a bus  
A semiconductor device includes: a transmitting section; and a receiving section, wherein the transmitting section and the receiving section are connected to each other through a bus, the...
6630897 Method and apparatus for signal detection in ultra wide-band communications  
Methods and apparatus for detecting ultra wide-band signals using circuitry having nonlinear dynamics characteristics are disclosed. The receiver circuit can be implemented using a simple tunnel...
6563393 Method and device for pulse density modulation  
A pulse density modulator unit transforms an N-bit input signal representing an input value, into an output digital signal having a digital pulse density which is a linear function of the input...
6473456 Data acquisition sensor and method of signaling  
A coding system for data and a demultiplexer and decoder forming an interface for a computer is disclosed. Both are improvements upon the system disclosed and claims in U.S. Pat. No. 4,188,581 of...
6463104 Method of increasing coding levels  
This invention concerns a method of increasing coding levels. In this method, an increase in levels is achieved with multi-level coding, where uninterrupted periodic sequences such as an...
6445737 Digital modulation device in a system and method of using the same  
A wireless digital transmission and receiving method combines phase reversal keying with pulse position modulation. Modulation of a transmitted signal implements pulses that are of extremely short...
6445333 Radio control device for model vehicle  
A redio control device suitable for model aircraft is provided that can quickly correct the rudder following the operation of a stick lever even during a delay operation, so that the manipulated...
6442200 Modulating circuit, demodulating circuit and modulating and demodulating circuit system, using PPM method  
A demodulating circuit demodulates a PPM signal obtained as a result of modulation performed in accordance with a PPM method. This circuit includes a detecting portion and a control portion. The...
6434187 Digital radiofrequency transceiver  
A method for radiofrequency (RF) transmission of digital information includes generating an RF signal using a voltage-controlled oscillator (VCO), stabilizing the RF signal from the VCO by...
6434194 Combined OOK-FSK/PPM modulation and communication protocol scheme providing low cost, low power consumption short range radio link  
A communication system provides robust, short range radio communications between battery operated devices by using ON-OFF-KEYED (OOK) modulation and either frequency shift keyed (FSK) modulation or...
6407595 Digital clock throttling means  
A digital clock throttling device, for gating a clock signal of a circuit, at least includes an accumulator and a gating circuit. The accumulator responsive to a throttling value generates a first...
6389548 Pulse run-length measurement for HF data signal by dividing accumulated phase difference between first and second zero-crossings by single-cycle range using multiple cycle range sawtooth waveform  
A system and method for accurately measuring a pulse run length in a high frequency (HF) data signal while utilizing a low analog-to-digital conversion (ADC) sampling rate. Four bits are added to...
6359525 Modulation technique for transmitting multiple high data rate signals through a band limited channel  
A digital data modulator includes a source of a plurality of digital data signals having a common data bit period. A plurality of encoders each encode a corresponding one of the plurality of...
6351490 Voice coding apparatus, voice decoding apparatus, and voice coding and decoding system  
A voice coding apparatus and a voice decoding apparatus are provided in order to improve the coding and decoding efficiency by eliminating useless coding levels. The apparatuses comprises an input...
6335946 Method and a device for broadband transmission  
In a method and a system for transmission of information, broad band frequency sweeps are used. A certain sweep then denotes a certain symbol. The frequencies between which the sweeps occur are...
6317457 Pulse density modulator  
A pulse density modulator for performing a modulation process by changing a pulse density per unit time. The pulse density modulator includes a counting circuit for counting supplied clock signals,...
6310906 Chaotic carrier pulse position modulation communication system and method  
A chaotic carrier pulse position modulation communication system and method is disclosed. The system includes a transmitter and receiver having matched chaotic pulse regenerators. The chaotic pulse...
6310914 Power saving infrared keyboard transmission method  
A power saving infrared keyboard transmission method adapted for data transmission of a cordless computer keyboard is disclosed. The cordless keyboard has a transmission modulus comprising a...
6304600 Modulation/demodulation method and apparatus  
In a modulation/demodulation system for an infrared data communication, a three-bit serial-to-parallel converting circuit captures an input signal in units of three bits in synchronism with an...
6295318 Method and system for increasing the data rate over twisted copper pairs and other bandwidth-limited dedicated communications facilities  
A system and associated methods that use separate paths to send amplified data. The method expands, or amplifies, the amount of data that can be transmitted over a dedicated bandwidth-limited...
6292051 Architecture of non-synchronous open loop demodulation circuit in pulse position modulation  
A simple demodulation circuit having a reduced hardware cost and an increased using flexibility is provided. Such architecture is used in a pulse position modulation for retrieving a data from a...
6259731 System and method for radio-communication using frequency modulated signals  
A method has the steps of generating a first control message having a plurality of message symbols and a first audio message to be transmitted from a first radio-communications device to a second...
6222880 Data transmission terminal and contactless data/power delivery method for use therewith  
A data transmission system (200) includes a data transmission terminal (201) and a portable data device (203) that is remotely powered by the terminal. A method is provided for supplying power and...
6219380 Pulse position modulation based transceiver architecture with fast acquisition slot-locked-loop  
A transceiver has a pulse position modulation (PPM) encoder, automatic gain control (AGC) circuit and timing recovery circuit. The PPM encoder illustratively has a frequency divider, slot selector,...
6212230 Method and apparatus for pulse position modulation  
A method and apparatus for pulse position modulation begins when a digital data stream is received. The encoding process continues by obtaining a set of bits from the digital data stream and...
6205169 Spread spectrum pulse position modulation communication system  
A first spread spectrum pulse position modulated signal with a pseudonoise code is generated. A second spread spectrum pulse position modulated signal with an inverted pseudonoise code is...
6198766 Method and apparatus for adaptive pre-demodulation pulse shaping  
One aspect of the invention provides a method of processing an PPM encoded input signal transmission of data pulses to a data processing apparatus by processing the pulses by lengthening or...
6198783 System for wireless serial transmission of encoded information  
The present invention provides a method for transmission of serial information over a wireless channel. The method includes modulating bits of information at selected parts of each cycle of a...
6181741 Remote control receiver  
The back end position of a pulse, which is transmitted from a remote control, varies according to the transmission distance, and the pulse width changes. A remote control receiver of the present...
6169765 Apparatus and method for output signal pulse width error correction in a communications receiver  
An output signal pulse width error correction circuit and method wherein errors in a data signal conforming to a communications protocol having a prescribed duty cycle are corrected by monitoring a...
6151149 Method and apparatus for pulse pattern modulation  
A method and apparatus for encoding data into a pulse pattern begins by encoding header data based on a first pulse encoding convention to produce a header pulse pattern. The resulting header pulse...
6147719 Pulse position modulation protocol  
Methods and apparatus for use in communication between a remote control and a receiving unit provide power saving modes of operation and enable remote control use of high data generating devices,...
6108377 Transmitter unit for an anti-theft system of a motor vehicle, and method for operating the transmitter unit  
A transmitter unit generates a carrier signal in the form of a periodic bipolar signal. The carrier signal has intrapulse periods between two pulses of different polarity. A transmission antenna is...
6108376 Reception and demodulation of widely spaced pulse position modulated signals  
A system for receiving information encoded in a train of pulse position modulated signals and then decoding the pulse train to produce amplitude modulated signals representing the original...
6081198 Method and apparatus for communication in an electric fence wiring system  
A method of sending a communication signal. The method includes the step of using a pulse density modulated signal in an electric fence. The method is particularly useful for communication on an...
6072829 Method of higher value step encoding  
To achieve economy of a transmission path with good quality of transmission and low expenditure compared to previous codes such as 4PSK-64PSK, the invention provides higher-value pulse duration...
6066982 Phase locked loop apparatus for pulse signal demodulation  
A pulse position modulation pulse signal to be demodulated is sampled by a pulse detection part based on a motion clock. The motion clock is generated from a motion clock generating part so that a...
6061005 Encoding of data  
The invention provides a method of encoding data, which includes defining a cell with a predetermined width and defining a plurality of internal signal positions within the cell, wherein the number...
6043920 Method and apparatus for laser communication through a lossy medium  
A laser transmitter (200, 300) includes a femptosecond pulse forming circuit (214, 308) and an ultra high-speed optical switch (218, 304) which enable the transmitter (200, 300) to generate a...
6031870 Method of electronic control  
5990923 High resolution dynamic pulse width modulation  
Pulse width modulation of signals, such as provided to a driver in a laser printer, is phase locked to a beam detect signal. In addition, it must permit continuously variable, arbitrarily small...
Matches 101 - 150 out of 345 < 1 2 3 4 5 6 7 >