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7327699 |
Method and device for synchronisation of distant clocks to a central clock via satellite
The invention relates to a method and a device for synchronizing one or more remote clocks ( 2 ) to a central clock ( 1 ) via a bi-directional satellite radio link ( 9.1, 9.2 ). Time and data signa...
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7321572 |
Frame relay protocol-based multiplex switching scheme for satellite mesh network
A frame relay protocol-based earth station interface architecture provides full mesh connectivity for a relatively small number of network stations. The fundamental component of the architecture is...
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7299013 |
Apparatus and method for correcting doppler shift in mobile communication systems
A system and method for correcting for Doppler shift in transmitted and received electromagnetic wave, light wave, or acoustic wave signals between two platforms, where at least one of the platform...
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7274327 |
Method and apparatus for determining location in a satellite communication system
A receiver unit ( 400 ) capable of determining its approximate location using a first and a second satellite transmission source ( 12 & 14 ) and, a first terrestrial transmission source ( 18 ) in...
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7257118 |
Frame relay switched data service
A new type of data transport service which uses a frame relay layer 2 data link connection identifier (DLCI) to select among various service types, feature sets, and/or closed user groups (CUGs). A...
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7245920 |
Apparatus and method for use in allocating a channel resource in wireless multiple access communications systems
Allocation of a wireless communications system channel resource is managed by utilizing traffic segment allocation. This is realized by partitioning the channel resource into an assignment channel ...
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7187903 |
Method and apparatus for timing correction in communication systems
In a wireless communications system, transceivers transmit short bursts to a base station, which determines timing corrections from the time of receipt of the burst and transmits the timing correct...
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7027414 |
Method, apparatus, and system for identifying and efficiently treating classes of traffic
An approach for processing packets for transmission over a satellite communications network is disclosed. A communication system includes a satellite terminal that provides connectivity for a host....
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7020567 |
System and method of measuring a signal propagation delay
The present invention relates generally to an improvement in the ability of test systems to test bit processing capacities of electronic devices, and in particular an improvement in their ability t...
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6999440 |
TDMA radio terminal capable of adjusting transmit timing by using measured delay time
A TDMA radio terminal comprises a transmitter portion and a receiver portion. A reference signal is launched in the transmitter portion while tuning the receiver portion. At the same time, an inter...
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6847611 |
Traffic management for frame relay switched data service
A new type of data transport service which uses a frame relay layer 2 data link connection identifier (DLCI) to select among various service types, feature sets, and/or closed user groups (CUGs)....
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6839330 |
Method and apparatus for improving asynchronous transfer mode operation over noisy, high speed wireless links
A method for encoding ATM cells for transmission over a wireless link comprising the steps of receiving an ATM cell stream comprised of a plurality of ATM cells and detecting idle/unassigned cells ...
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6819930 |
Apparatus and method for use in allocating a channel resource in wireless multiple access communications systems
Allocation of a wireless communications system channel resource is managed by utilizing traffic segment allocation. This is realized by partitioning the channel resource into an assignment channel ...
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6771617 |
Frame relay protocol-based multiplex switching scheme for satellite mesh network
A frame relay protocol-based earth station interface architecture provides full mesh connectivity for a relatively small number of network stations. The fundamental component of the architecture is...
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6711140 |
Method and apparatus for fast acquisition and synchronization of transmission frames
A method and apparatus for providing frame acquisition and synchronization for ATM transmissions in terrestrial wireless and satellite systems. During acquisition ( 1020 ), the transmitter ( 15 ) f...
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6690745 |
Circuit for detecting the phase of received signal
A received signal phase detecting circuit in provided in which the circuit scale is small. The circuit functions so as to capture a frame synchronizing signal from a demodulated baseband signal, ex...
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6633590 |
Method of synchronizing a reference clock of a ground station and a clock of a remote system
The invention relates to a method of synchronizing a reference clock of a first ground station and a local clock of a remote system, in particular a satellite. It includes: a) acquisition in a fir...
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6625130 |
Frame relay protocol-based multiplex switching scheme for satellite mesh network
A frame relay protocol-based earth station interface architecture provides full mesh connectivity for a relatively small number of network stations. The fundamental component of the architecture is...
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6463049 |
TDMA radio terminal capable of adjusting transmit timing by using measured delay time
A TDMA radio terminal comprises a transmitter portion and a receiver portion. A reference signal is launched in the transmitter portion while tuning the receiver portion. At the same tine, an inter...
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6434361 |
Synchronization burst processor for a processing satellite
A synchronization burst processor ( 56 ) used in a processing satellite ( 12 ) in a satellite based communications system ( 10 ) is provided with a sync burst memory ( 72 ), a first double correlat...
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6404811 |
Interactive multimedia system
An interactive multimedia audio/video communications system uses a lower data rate, non-deterministic graphics/command network having a plurality of desktop viewing stations and a network server. A...
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6381227 |
Frame relay protocol-based multiplex switching scheme for satellite mesh network
A frame relay protocol-based earth station interface architecture provides full mesh connectivity for a relatively small number of network stations. The fundamental component of the architecture is...
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6212222 |
Initial acquisition circuit
In the identical spread code multiplex SS system, a delay correction unit and a multiplexer calculates the multiplexed square correlation value by matching the peak values and adding the square cor...
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5867500 |
Communications in a distribution network
In an arrangement for transmitting traffic in asynchronous transfer mode (ATM) cells in downstream and upstream frames between an out station and a base station, upstream traffic cells are queued i...
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5822314 |
Communications system and method of operation
A method of operation of a communications system, having first (10) and second communications units (12) communicating frame divided information via a relay device (11). The second communications u...
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5734867 |
Method, device, microprocessor and microprocessor memory for instantaneous preemption of packet data
The present invention provides a method (500), device (400), microprocessor (500) and microprocessor memory (400, 500, 600) for instantaneous preemption of packet-switched data from a user that has...
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5717686 |
Cellular spacecraft TDMA communications system with call interrupt coding system for maximizing traffic throughput
Improved throughput is provided in a spacecraft TDMA cellular communications system by in-call signalling without the need for flag bits, while still allowing the in-call signaling to be differenti...
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5657323 |
Method and apparatus for signal transmission in a communication system
A method and apparatus for controlling communication channel allocation in a communication system (10) by obtaining (405) statistical system performance data, determining (415, 420) by a processor ...
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5640672 |
Communication system for varying timing offset to accommodate variation in propagation delay
In a communication system for transmitting and receiving burst signal between a round-trip satellite and a ground station, upon transmission of a transmitting burst signal from the round-trip satel...
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5590161 |
Apparatus for synchronizing digital data without using overhead frame bits by using deliberately introduced errors for indicating superframe synchronization of audio signals
A transmitter for transmitting a low probability of detection rf signal, in which digitized audio data is contained therein. Each data frame contains deliberately introduced errors to synchronize a...
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5553077 |
Method and device for automatic synchronisation of data bursts
A method and device for automatic synchronization of data bursts that is applicable to cordless communications systems with time division multiple access, TDMA, for synchronizing the timebases of c...
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5515056 |
Burst tone range processing system and method
A burst tone range processing system for determining the distance between a ranging station and a signal re-transmitting target device, generates a burst tone signal of finite duration and transmit...
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5440562 |
Communication through a channel having a variable propagation delay
A communication system (10) communicates real time data through a channel (26) that imposes delays of variable duration on signals propagating therethrough. The channel (26) may be established betw...
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4712212 |
Terminal control device for reference station in TDMA satellite communication system
A terminal control device for a reference station in a TDMA satellite communication system includes means for generating a parallel acquisition window applicable to a parallel initial acquisition s...
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4688217 |
Method of implementing burst acquisition control in TDMA system
In order to implement burst acquisition control of reference stations over a traffic terminal(s) in the TDMA system, the reference station opens a synchronization window at the nominal position of ...
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4625308 |
All digital IDMA dynamic channel allocated satellite communications system and method
An all digital TDMA dynamic channel allocated satellite communications system and method provides a satellite communications network between geographically separated nodes. The topology of the netw...
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4574379 |
Synchronization technique for non-colocated TV signals in a TDMA satellite communication system
The present invention relates to a technique for the synchronization of multiplexed television signals within each burst signals received at a remote station or satellite in a TDMA communication sy...
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4569042 |
Time measurements in a transmission path
In a voice packet switching network (10), following call path set-up, continuity packets (500a-c) are transmitted between the call originating (100) and destination (101) nodes to check call path c...
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4418425 |
Encryption using destination addresses in a TDMA satellite communications network
An encryption system is disclosed which is based on channel destination addresses for a time division multiple access (TDMA) satellite communications network. A superframe initialization vector is ...
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