Matches 151 - 200 out of 345 < 1 2 3 4 5 6 7 >
Match Document Document Title
5977822 Method and apparatus of pulse position demodulation  
A method and apparatus for pulse position demodulation begins by receiving a pulse that is positioned approximately at one of a plurality of time intervals within a time chip, where the pulse has a...
5963595 Method and apparatus for encoding and decoding a bit sequence for transmission over POTS wiring  
A method and apparatus for encoding a bit sequence as a symbol, suitable for transmission over POTS wiring, are described. The symbol has a duration indicative of the bit sequence, this time...
5952936 Bidirectional remote control system using interrupt arbitration  
A data format is formed by a start code, an identification code and its inverted code, a first data code and a second data code, each of these codes being a single byte code, which is then followed...
5926301 Method and apparatus for optical wireless communication  
The wireless communication system, comprising a transmitter and a receiver, operates according to the present PPM-FSK modulation format with two subcarrier frequencies f 1 and f 2 . The PPM...
5920596 Apparatus for amplifying a signal using a digital processor  
An apparatus for amplifying a signal that includes a digital processor (12) producing a first digital signal (20) and a second digital signal (22), a pulse width modulator (32) receiving the first...
5886803 Bilateral optical transmission system and optical transceiver for pulse information  
A bilateral optical transmission system for pulse information disclosed which can accommodate variations in the relationship between the down-link signal transmission rate and the up-link one. A...
5870380 Method and apparatus for reception of signals from several transmitters wherein each transmitter is characterized by their output pulse train  
The disclosure relates to a method of reception of signals from at least two transmitters (RCi), wherein for each transmitter the data ("0", "1") are represented by the time interval (T0i, T1i)...
5844942 Pulse position modulation communications protocol  
A method for modulating a radio signal has the steps of: predetermining a first time interval so as to define a data word; generating a synchronization pulse, the synchronization pulse initiating a...
5838210 Method and apparatus for generating a modulated signal  
A method and apparatus for generating a modulated signal include a pulse modulation source (215), a pulse modulator (20) for modulating a pulsed signal, a high efficiency power amplifier (230) for...
5825815 Dual UART device with a reduced package pin number  
A circuit arrangement between an input/output (I/O) integrated circuit (IC) and an I/O coupler IC includes a first universal asynchronous receiver-transmitter (UART) and a second UART provided...
5764697 Transmitter for a radio control device  
A radio control device includes a transmitter, in which a crystal type high frequency module equipped with a high frequency circuit corresponding to a frequency band of a carrier and a PLL high...
5764696 Chiral and dual polarization techniques for an ultra-wide band communication system  
Chiral and dual polarization techniques for an ultra-wide band communication system provide an ultra-wide band signal having signal components in two dimensions. The polarization techniques utilize...
5737140 Simple pulse position modulation channel/decoder  
In a magnetic recording reproducing apparatus, a detecting and decoding circuit comprising: a first integrator having an input for receiving a pulse position modulated (PPM) encoded signal...
5712871 Method and apparatus for implementing a direct-sequence code division multiple access communication system with an M-ary pulse-position modulated spreading-sequence signal  
A BPSK-MPP-DS-CDMA system is devised based on an M-ary pulse position modulated spreading-sequence signal. Under same bandwidth, same amount of energy used for one decision, and same bit error rate...
5694435 Digital method of detecting pulses of short duration and arrangement for implementing the method  
The invention relates to a digital method of detecting pulses of short duration and an arrangement for implementing the method. A threshold value is generated by means of a statistical procedure...
5691665 PPM demodulation device  
A clock reproduction unit provides a reproduced clock signal from a received PPM signal. The results of sampling the PPM signal with a reproduced clock signal is held by a sample result holding...
5684871 Method and apparatus for multi-mode infrared data transmission  
A method and apparatus for transmitting information over a wireless connection are provided. A correlation is established between a set of symbols and a set of pulse position/signal characteristic...
5675609 Sinusoidal pulse and pulse train signaling apparatus  
This contribution involves the generation, transmission, propagation and selective reception of electrical, magnetic or electromagnetic energy in the form of a halfwave sinusoidal pulse signal,...
5666379 Best-of-M pulse position modulation detector  
A pulse position modulation detector divides a timing window into a plurality of pulse position windows, determines the peak magnitude of a signal level received during each pulse position window,...
5661758 Single cycle data encoding method and apparatus  
A method and device for manipulating data encoded for introduction to a periodic carrier signal. Distinct disruptions having selected qualities are defined for each character of data. Individual...
5661754 Receiver arrangement  
An infrared remote-control receiver employs at its front end a gyrator-configured transistor operating as a current-to-voltage converter, but derives its data information from a negative-going...
5651025 Method and apparatus pertaining to communication along an electric fence line  
A communication device is arranged to send a communication signal in the form of code pulses down an electric fence line which is energized by electric pulses from a fence energizer. The code...
5640419 Covert communication system  
A covert communication system utilizes a series of low level duty cycle coded pulse train transmissions which at the necessary end have signal to noise ratios much smaller than unity. Such...
5627846 Drop-out location detection circuit  
A digital data reproducing circuit for use with a magnetic or optical data storage for detecting and flagging signal level drop-outs in pulse position modulated (PPM) recorded signal levels....
5623511 Spread spectrum code pulse position modulated receiver having delay spread compensation  
A spread spectrum code pulse position modulated communication system is disclosed. The communication system includes a spread spectrum code pulse position modulated receiver that compensates for...
5615223 PPM decoder utilizing drop-out location information  
A method of and apparatus for decoding data from positive and negative pulses of an encoded pulse train, e.g. a NRZ pulse train for PPM encoding, wherein the recorded data is subject to drop-outs...
5610947 IR FM modem with flash modulation  
Biphase or FM encoding is combined with Flash modulation in infrared (IR) communication. By shrinking the coded pulse width in the modulation process, power dissipation is effectively reduced to...
5610903 Auto negotiation system for a communications network  
A system provides for detection of enhanced capabilities of stations on a communications network. A specified pattern of link test pulses are detected and transmitted to provide for the indication...
5596601 Method and apparatus for spread spectrum code pulse position modulation  
A spread spectrum code pulse position modulated communication system is disclosed. The frequency spectrum of a transmitted signal is spread by encoding bits with a predefined spectrum-spreading...
5586145 Transmission of electronic information by pulse position modulation utilizing low average power  
A method and apparatus are shown for generating and transmitting very short and widely separated high frequency sine-wave pulses of electromagnetic energy into space. A transistor, a charging...
5566207 Digital FM synthesizer for record circuitry  
A digital synthesizer for record circuitry of, e.g., a VCR, is supplied with digital samples representing a video signal. A calculator stage, responsive to the digital samples calculates a sequence...
5524123 Method for the computer-controlled generation of pulse interval sequences with periods of repeating pulse intervals  
A method and apparatus for the computer-controlled generation of pulses which are arranged in intervals which intervals are grouped in a sequence that is to be repeated. The apparatus employs a...
5506577 Synchronizer for pulse code modulation telemetry  
The invention is a method of synchronizing a digital telemetry receiver to a digital telemetry transmitter. The method includes the steps of initializing the sampling period of the receiver,...
5504279 Wireless pen tablet  
A wireless communication apparatus sends X and Y coordinate position signals of a pen on a tablet using position modulation of three pulses, the time separation between the first and second pulses...
5495209 Switched-inverter modulator for producing modulated high voltage pulses  
A switched-inverter modulator for use in driving a load that comprises master and slave high voltage power supplies for providing output pulses that directly drive the load. A synchronized pulse...
5488628 Method and apparatus for transition encoding a logic signal  
A known method for transition encoding a logic signal involves: recording for each of a succession of window periods, the position of occurence of a first transition of the logic signal during that...
5473633 Process and a system for digital modulation  
A digital modulation process and apparatus for converting an input signal comprising a time variable series of sampling values, each of which sampling values remains constant within a fixed...
5453742 High density data compression encode/decode circuit apparatus and method of using in local area networks  
Data compression encoding and decoding circuitry which eliminates the need for decode circuitry that looks for the flux reversal points, or peaks, namely the peak detector and the phase-lock-loop...
5446757 Code-division-multiple-access-system based on M-ary pulse-position modulated direct-sequence  
A BPSK-MPP-DS-CDMA system is devised using a pulse position modulated direct sequence technique. Under the same bandwidth, same energy used for one decision, and same bit error rate conditions, if...
5430763 Frequency stabilizing circuit used for a pulse modulator for an image signal including a synchronous signal  
The present invention discloses a frequency stabilizing circuit used for a modulator that modulates an image signal including a synchronous signal into a pulse modulation signal. The frequency...
5416800 Mobile radio receiver for a radio transmission system  
A mobile radio receiver for a digital radio transmission system includes a recognition arrangement (6) for searching a received digital signal for pulses (i) of a frequency correction burst which...
5411536 Method and apparatus for communicating data between medical devices to improve detectability of errors  
A method and apparatus for processing data to be communicated between an implantable medical device and an external medical device to improve detectability of communication errors. An encoded block...
5408351 Optical communication system  
An optical communication system includes an optical transmitter which transmits data symbols as pairs of optical pulses having 1) a first predetermined time separation representing a first inputted...
5404379 Timing recovery method and system  
An apparatus and method for receiving a continuous time pulse amplitude-modulated passband signal is disclosed. The pulse amplitude modulated signal is periodically sampled by a local clock to...
5387906 Signal receiving control system of a remote control device  
A control system includes receiving module for receiving a signal from a transmitting unit. Also included is a microprocessor including an input port for inputting the signal from the receiving...
5353303 Technique for increasing the data rate in a spread spectrum data link  
A method for increasing the bit rate of a data link is to select two additional 31-bit chip code patterns that are orthogonal to the present two chip codes, and to each other. This method will not...
5313236 Demodulation processing circuit with time interval counting feature  
In a demodulation circuit for demodulating a pulse position modulation (PPM) signal, and a camera having the demodulation circuit, a change in PPM signal is counted by an up/down counter which is...
5257288 Data transmission system  
A data transmission system and method in which digitalized information is transmitted via a data transmission link in complete binary words from a transmitter to a receiver. For data transmission,...
5243626 Method for clocks synchronization for receiving pulse position encoded signals  
A method for clock synchronization for receiving pulse position encoded signals in which a clock signal defines slots or windows of time in which to receive pulse signals. The signal received...
5185766 Apparatus and method for decoding biphase-coded data  
There is provided a system for decoding a digital code and in particular a biphase-coded data, by detecting edges of the biphase-coded data and the time intervals between edge conditions. A system...
Matches 151 - 200 out of 345 < 1 2 3 4 5 6 7 >