Matches 401 - 448 out of 448 < 1 2 3 4 5 6 7 8 9
Match Document Document Title
5355529 Paging system with satellite time base  
A satellite (26) is operable to transmit timing information to a plurality of paging sites having towers (10) associated therewith and satellite receivers (48) associated therewith. This provides a...
5345594 Information transmission system retransmitting information signals according to retransmission schedule  
An information transmission system in which an information signal supplied from a base station is automatically edited at relay stations and retransmitted to terminal stations according to a...
5321736 Distributed RF repeater arrangement for cordless telephones  
An RF repeater arrangement for use in linking cordless handsets to a base station, has RF repeaters spaced from a common power supply unit and so distributed over an area to be serviced by the...
5301354 Satellite based global paging system  
A satellite based paging communication system comprises a plurality of terrestrial stations capable of communicating the paging information with at least one satellite. The satellite(s), in turn,...
5287541 Global satellite communication system with geographic protocol conversion  
A satellite communication system (1110) provides geographic protocol conversion for message delivery between communication transceivers (1118, 1118') operating within at least two geographic areas...
5287542 Method to expand an audience in a communication system network  
A central controller of a communication system network may more efficiently expand an audience of a communication in the following manner. When a communication unit of a first communication group...
5278539 Alerting and warning system  
An emergency alerting system for alerting or warning large numbers of people of the occurrence or threat of an emergency using available communications media. Multiple facilities are monitored for...
5274840 Satellite communication system  
A selective call receiver transmission system for transmitting a message to at least one selected selective call receiver of a plurality of selective call receivers comprises a transmitter for...
5257099 Central data processing station for satellite communication with local area audience response station  
A network of local area audience response systems is coupled together at a central audience response processing station by a satellite communication system for real time audience response analysis,...
5239666 Mobile detector using RSSI for vehicular repeater prioritization  
A communication system (10) comprises a portable radio (20) and a plurality of mobile repeaters (12), a mobile repeater system 200 comprising a portable signal receiver (224) for receiving portable...
5239671 Simulcast satellite paging system with provision for signal interruption  
A paging system includes a satellite uplink (40) for assembling paging information and transmitting it to a satellite (26). The satellite (26) is then operable to transmit in a simulcast manner all...
5233626 Repeater diversity spread spectrum communication system  
A repeater diversity spread spectrum communication system provides substantially fade free communications between a transmitter (1) and a receiver (7). A transmitted signal is relayed through a...
5223816 Security and communication system with location detection  
An improved security and communication system accurately and quickly locates the position of a signaling portable radio frequency transmitter. When a portable transmitter is activated, a first...
5187805 Telemetry, tracking and control for satellite cellular communication systems  
A Telemetry, Tracking and Control (TT&C) system for a satellite cellular communication system utilizing one of the user voice/data communication channels to communicate TT&C data with a satellite...
5185761 GPS receiver  
A GPS receiver comprising a plurality of demodulators. A satellite transmission search range is divided into as many frequency ranges as the demodulators so that one demodulator is assigned to one...
5164985 Passive universal communicator system  
A communication system includes a base station, called a "Controller" and one or more remote or satellite stations, each called a "Communicator". The controller arbitrates, controls and...
5099235 Method for transferring data through a network of intelligent control stations using decentralized control techniques  
A method for transferring data through a network of intelligent control stations (S1-S14) uses decentralized control techniques and associates the intelligent stations (S1-S14) with an addressing...
5081703 Satellite mobile communication system for rural service areas  
A mobile communications system uses a communications satellite and a Mobile Telephone Switching Office (MTSO) and communicates with mobile units via the satellite. A cell site has a co-located cell...
5066957 Hybrid modulation satellite communication system  
In a satellite communication system including a plural small earth stations (3-8), a relay earth station (2) and a satellite (1), information transmission is undertaken by primary modulation of...
5038398 Method of assigning communication links in a dynamic communication network  
A method of assigning communicaton links in a dynamic communication network, such as a network of earth orbiting satellites arranged, for example in three constellations. The assignments are made...
4956875 Emergency radio alerting and message transmitting system directable to selected classes and numbers of receivers  
An emergency radio alerting and warning system comprising an FM transmitter having first and second encoding means, the first encoding means enabling the selection of all receivers in a given...
4943808 Communications system with moving bodies with the aid of satellites  
The system comprises at least two geosynchronous satellites (S-A, S-B) having the same elliptical orbit and the same trace on the ground. The longitudes of ascending node are displaced. The moving...
4691882 Co-operative satellites  
A satellite orbiting arrangement including an orbiting cluster of co-operative satellites in which inter-satellite communication is to be maintained substantially constantly, the arrangement...
4506383 Method and apparatus for relaying signals between a ground station and a satellite using a ground relay station  
In satellite communication systems it is often necessary to relay the signal between terminal stations and the satellite through ground relay stations remote from the terminal stations. Normally,...
4502051 Telecommunication system with satellites positioned in geostationary positional loops  
A telecommunication satellite system in which its activated satellites are placed in geostationary positional loops and consist of asynchronously orbiting satellites of identical telecommunication...
4397019 TDMA Intertransponder communication  
Groups of stations operate in TDMA mode relative to associated frequency-separated transponder segments of a satellite repeater. Stations at radio signaling modes in all groups key to a common...
4375697 Satellite arrangement providing effective use of the geostationary orbit  
A satellite squadron or cluster formation is disposed in a predetermined location in the geostationary orbit, including a plurality of controllably maneuverable communication satellites and a...
4285064 TDMA Satellite communication system  
A time division multiple access satellite communication architecture is disclosed to achieve a relatively simple control procedure for permitting multiple computers to establish peer coupled...
4115661 Single channel per burst TDMA multiple transponder network  
A time division multiple access (TDMA) communication system has a plurality of geographically separated stations including a first group of stations, each of which can communicate with any other...
4109202 Traffic switching in communications satellites  
A channel switching system useful in a satellite for amplifying some or all of three different RF frequency-band channel signals in two traveling wave tube amplifiers and transmitting the signals...
4004098 Satellite on-board switching system with satellite-to-satellite link  
A Space Division Multiple Access (SDMA) Communications satellite system which utilizes a pair of communications satellite relays having a communications link between them. Each satellite includes a...
3974448 Use of equalizers in satellite communication transmission systems  
A satellite communication transmission system for assuring distortion free transmission of signals via satellites and wherein a single distortion compensator is utilized in an I.F. section rather...
3917998 Butler matrix transponder  
A new design for a multiple channel repeater having advantages for satellite communications systems is described. The design comprises a pair of complementary N × N Butler matrix networks that...
3842350 COMBINED LAND LINE AND SATELLITE COMMUNICATION SWITCHING SYSTEM  
Ground terminal serving a number of individual telephone lines in a local region converts their signals to an intermediate frequency without regard to whether called station is in same local region...
3836969 GEO-SYNCHRONOUS SATELLITES IN QUASI-EQUATORIAL ORBITS  
The method of the selection of launch conditions for a satellite at substantially synchronous altitude above the earth in a slightly inclined orbit relative to the equatorial plane of the earth to...
3742498 SYNCHRONIZATION AND POSITION LOCATION SYSTEM  
A master station and N slave stations include synchronization equipment to enable each of the stations to have access to a common repeater in a different one of M time slots of a TDM format at the...
3742358 TETHERED AIRBORNE COMMUNICATIONS AND INFORMATION TRANSFER SYSTEM  
A tethered balloon including means for controlling the height thereof is utilized as an airborne platform for transmitting and receiving apparatus including a multiple antenna assembly. The antenna...
3710255 SATELLITE COMMUNICATION SYSTEM  
An improved communication system using an active transponder to relay microwave signals from any one of a number of transmitting stations to selected groups of receiving stations. In a preferred...
3497807 MULTIPURPOSE SATELLITE SYSTEM  
3452356 DIRECTIONAL RADIO RELAY SYSTEM  
3384891 Method and system for long distance navigation and communication  
3363180 Communication system  
3349398 Satellite communication system  
3340531 Satellite communication system  
3271511 Colour television transmission system for transmission by means of at least one satellite  
3150320 Space satellite communications system employing a modulator-reflector relay means  
3110773 Delayed call telephone system  
3706037 Title is not available  
Matches 401 - 448 out of 448 < 1 2 3 4 5 6 7 8 9