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4052670 |
Space diversity system in PCM-TDMA telecommunication system using stationary communication satellite
A space diversity PCM-TDMA telecommunication system using a stationary communication satellite, in which fixed delay circuits are respectively inserted in the sending side and the receiving side of...
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4049917 |
PCM telecommunication system with merger of two bit streams along a common signal path
A transmitting terminal, communicating via a PCM link with a remote receiving terminal, processes two simultaneously arriving bit streams consisting of recurrent frames of 32 time slots, 29 of...
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3995120 |
Digital time-division multiplexing system
A time-division multiplexing system wherein N parallel digital signals having an average bit rate of f 1 are interleaved by a multiplexer to form a single composite line signal of bit rate f 2 ,...
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3987250 |
Data transmission network with independent frame phase
A time division digital transmission system in which data are transmitted in the form of pulses grouped in multiplex words in time slots forming a recurrent frame. The invention relates more...
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3962634 |
Automatic delay compensator
An apparatus for automatically maintaining constant the transmission time lay between a transmitter and receiver, given variations due to transmission path length or clock drift. A received signal...
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3932705 |
PSK telemetering synchronization and demodulation apparatus including an ambiguity eliminating device
A PSK synchronizer and demodulator with message coded in biphase, modulated in phase by a subcarrier, having three chains I, II, III of identical general structure, the first operating on twice the...
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3928726 |
Common control variable shift reframe circuit
The PCM encoded digital data groups transmitted to a switching office are respectively stored a frame at a time and then read out from store in the sequence such that a plurality of digital groups...
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3919484 |
Loop controller for a loop data communications system
A loop controller for a time division multiplexed loop communications system. The loop controller is connected in series with a plurality of data processors in a loop configuration. The loop...
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3911226 |
Installation for multiplex transmission of digital signals
A plurality of digital detectors (e.g. of seismic vibrations) provide and store digital signals representative of samples of a detected quantity. The detectors are connected in series by a...
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3908084 |
High frequency character receiver
A receiver is disclosed for synchronized character pulse processing in a time slot interchange system. The receiver analyzes the phase of a character start pulse for synchronizing succeeding pulses...
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3906159 |
TDM exchange with incoming PCM frames delayed with respect to outgoing PCM frames
A time multiplex communication system for transmission of pulse code modulated signals, using several exchange stations. At each exchange station, varying delays in transmission are compensated for...
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3903371 |
Common control framing detector
The PCM encoded digital data groups transmitted to a switching office are respectively stored a frame at a time and then read out from store in a sequence such that a plurality of digital groups...
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3867579 |
SYNCHRONIZATION APPARATUS FOR A TIME DIVISION SWITCHING SYSTEM
A pair of data stores are provided for each incoming multiplex line to a time division switch and successive frames of incoming data are alternately written into the stores using recovered line...
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3843930 |
TIME DELAY CONTROLLER CIRCUIT FOR REDUCING TIME JITTER BETWEEN SIGNAL GROUPS
A time delay controller circuit wherein a time delay device, which comprises two dispersive delay lines interconnected to provide electronically variable "flat" time delay, is mechanized in a...
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3839599 |
LINE VARIATION COMPENSATION SYSTEM FOR SYNCHRONIZED PCM DIGITAL SWITCHING
A line synchronizer system including a digital phase detector subsystem, a frame detector subsystem and an elastic buffer register store subsystem is used within a digital PCM switching exchange to...
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3838416 |
DIGITAL/ANALOG SUBTERMINAL
A digital/analog subterminal in a digital transmission system in which the total number of quantizing levels of the analog signal is less than the total number of digits per frame so that the...
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3829843 |
READOUT CIRCUITRY FOR ELASTIC DATA BIT STORES
Shift register stages delay incoming frames of data to align each frame with framing pulses of a local clock and to compensate for jitter of the incoming data stream. Variable delay is provided by...
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3825899 |
EXPANSION/COMPRESSION AND ELASTIC BUFFER COMBINATION
In a satellite transponder communications system operating in a time division multiple access mode, each earth station transmits data in a burst format. All bursts within a single transponder frame...
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3825683 |
LINE VARIATION COMPENSATION SYSTEM FOR SYNCHRONIZED PCM DIGITAL SWITCHING
A line synchronizer system including a digital phase detector subsystem, a frame detector subsystem and an elastic buffer register store subsystem is used within a digital PCM switching exchange to...
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3824545 |
ARRANGEMENT FOR COLLECTING AND/OR DISTRIBUTING INFORMATION VIA TRANSMISSION LINES
An arrangement for collecting and/or distributing information, comprising a master station and a number of terminal stations, each terminal station being connected to the preceding terminal station...
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3823377 |
COMMUNICATION SYSTEMS
A transmitter for use in a communication system in which successive frames of coded data are transmitted over a multi-channel link from a transmitting station to a receiving station includes a code...
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3808368 |
SLAVED PCM CLOCK CIRCUIT
In a frequency synchronized PCM transmission loop between a master switching exchange and slaved terminal equipment, a slaved PCM clock timing circuit is adjustable to alter the receive-to-transmit...
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3790716 |
SYNCHRONIZATION CIRCUIT FOR A PCM-TDM EXCHANGE
A channel synchronization control circuit is disclosed for a PCM telecommunication system in which for each group of trunks there is provided a synchronization circuit with data memories for each...
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3789148 |
MULTIPLEX TRANSMISSION METHOD
A multiplex transmission method using a plurality of carrier signals each of which is not correlated with one another. The carrier signals are derived from e.g., an irregular signal. Each of the...
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3769452 |
NARROW BAND TELEVISION SYSTEM
Picture elements in a fast-scanned, or broad-bandwidth video signal are selected pseudo-randomly, and signals representative of their amplitude are transmitted over a narrow band channel to a...
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3763318 |
TIME DIVISION MULTIPLEXER-DEMULTIPLEXER FOR DIGITAL TRANSMISSION AT GIGAHERTZ RATES
The invention is a time division multiplexing-demultiplexing system for converting the parallel digits of a data word into serial format, transmitting the serial digits on a transmission line and...
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3760109 |
TIME DIVISION MULTIPLEX TRANSMISSION SYSTEM
A system in which each single pulse generator is provided for producing each one single pulse representing each one information, which system including a transmitter consisting of at least two...
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3725590 |
ARRANGEMENT FOR TDM TELECOMMUNICATION BETWEEN PCM SWITCHING NETWORKS
A TDM switching system is disclosed which permits PCM transmission between exchanges. Both directions of transmission are regulated at the clock rate of one exchange. Using a particular form of...
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3708626 |
SWITCHING CENTER FOR PCM- TIME MULTIPLEX TELEPHONE NETWORK
A time division communication system which provides means for connecting the information in a pulse frame on an incoming telephone line to the next free time channel in a pulse frame on an outgoing...
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3699261 |
FRAME SYNCHRONIZING CIRCUIT FOR HIGH CLOCK FREQUENCY DIGITAL COMMUNICATION
A frame synchronizing circuit utilizes dual signal loops for inhibiting a clock pulse generator for a given time duration. The first loop includes a timing pulse generator a frame synchronous pulse...
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3681759 |
DATA LOOP SYNCHRONIZING APPARATUS
Apparatus for use with a multichannel, time division multiplex, multidata rate closed data loop to variably compensate for delays incurred during circulation of the data bits around the loop....
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3671674 |
CIRCUIT ARRANGEMENT FOR THE RECEPTION AND FORWARDING OF MESSAGE SIGNALS IN TIME DIVISION MULTIPLEX EXCHANGE STATIONS
A circuit arrangement for telecommunication exchange installations is described wherein connections are completed utilizing time multiplex techniques. In the described embodiment the message...
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3604936 |
OPTICAL TIME DIVISION SWITCHING SYSTEM
An optical time division switching system is described in which coherent light from a laser is successively applied to a group of modulators controlled by electrical signals from corresponding...
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3597547 |
APPARATUS FOR SYNCHRONIZING A PCM-RECEIVER AND A TRANSMITTER
A method for synchronizing the receiver and the transmitter in a PCM-receiver system wherein binary information is transmitted within cyclically occurring channels. The last bit of each of the...
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3596000 |
PROCESS FOR TRANSMISSION OF MESSAGES IN TIME MULTIPLEX COMMUNICATION SYSTEM
A time multiplex communication system for transmission of pulse code modulated signals, using several exchange stations. At each exchange station, varying delays in transmission are compensated for...
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3573634 |
TIMING OF REGENERATOR AND RECEIVER APPARATUS FOR AN UNRESTRICTED DIGITAL COMMUNICATION SIGNAL
A dedicated burst of timing pulses is multiplexed in each frame of an unrestricted digital signal to supply timing information to receiver and regenerator circuits in a time division communication...
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3571516 |
DEMULTIPLEXING APPARATUS
Demultiplexing apparatus is provided in accordance with the teachings of the present invention wherein a high-speed pulse train comprising a plurality of low-speed pulse trains, which each include...
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3558824 |
TIME-DIVISIONAL PHASE SYNCHRONIZING APPARATUS FOR A TIME-DIVISIONAL MULTIPLE SIGNAL OF BURST MODE
A time-divisional phase synchronizing apparatus is provided using a phase lock loop for a time-divisional multiple signal of burst mode including signals from a plurality of stations. A memory...
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3541265 |
RECEIVER FOR A TIME MULTIPLEXING TRANSMISSION SYSTEM
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3504125 |
NETWORK SYNCHRONIZATION IN A TIME DIVISION SWITCHING SYSTEM
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3499994 |
MULTIPLEX TRANSMISSION SUPERVISORY SYSTEM USING A PRESELECTED SIGNALLING CHANNEL
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3475559 |
METHOD AND ARRANGEMENT FOR THE SYNCHRONIZATION OF DIGITAL TIME MULTIPLEX SYSTEMS
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3459893 |
MULTIPLE TRUNK DIGITAL SWITCHING SYNCHRONIZATION
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3457372 |
TIME DIVISION SWITCHING CENTERS HAVING MUTUALLY CONTROLLED OSCILLATORS
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3453594 |
ELECTRICAL COMMUNICATIONS SYSTEMS
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3359371 |
Control arrangement for a receiver for pulse-code modulated time-division multiplex signals
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3337850 |
Digital phase transition detector
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3336578 |
Detector of aperiodic diphase marker pulses
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3334189 |
Delay storage time slot selector
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3334188 |
Delay time-slot storage
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