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7023832 |
Paging system with spacial, frequency and time diversity
A highly reliable radio paging system with a combination of time, frequency and spacial diversity in order to increase the reliability of the system. Time diversity is provided by broadcasting the...
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6463462 |
Automated system and method for delivery of messages and processing of message responses
An automated system for delivery of messages to multiple recipients, and for processing of responses to the messages, includes a message client, message server, and system database. A message is...
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5708964 |
Paging satelite line receiver having automatic signal acquisition
A satellite receiver includes a signal acquisition unit that is operative to receive a validation signal from a station controller located at a paging station. The satellite receiver is operative...
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5512916 |
Method and apparatus for processing and subsequently displaying transmitted image data on an active-addressed display device
A method, in a data communication receiver having a display, for processing received information comprises the steps of receiving (1100) an address, wherein the address is associated with a...
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5249202 |
Radio communication
In a transparent tone-in-band (TTIB) single-sideband-modulated communication system used to communicate digital data; to compensate for variations due, eg, to doppler shift of the pilot tone in the...
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5206855 |
Multiple frequency message system
A transmitter system for transmitting coded message signals on a plurality of channels of which at least one channel to be assigned to each of a plurality of geographical areas. The coded message...
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5197084 |
Automatic information acquisition system
The automatic information acquisition system includes a process for the control of a tunable radio receiver to automatically receive, decode, and store digitally-coded information which has been...
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4914649 |
Multiple frequency message system
A multiple frequency message system includes a transmitter for transmitting coded message signals on a plurality of channels of which at least one channel to be assigned to each of a plurality of...
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RE33157 |
Null initiated method and system for monitoring a priority channel
A null initiated priority channel monitoring system provides enhanced nonpriority signal intelligibility and/or enhanced priority channel sensitivity during sample times. The priority channel or...
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4633515 |
Emergency broadcast alert detector
An emergency broadcast alert detector having a radio receiver scanning among several predetermined frequencies. The audio output of the radio receiver is connected to a noise detector that allows...
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