Multiplex communications – Wide area network – Packet switching
Patent
1988-04-13
1989-07-25
Griffin, Robert L.
Multiplex communications
Wide area network
Packet switching
375101, 455 65, H04J 306
Patent
active
048520900
ABSTRACT:
A method and means for reducing multipath interference distortion in a time-division multiple access (TDMA) communications system is disclosed. A transmitting station (100) formats one or more equalizer synchronization words with a first user's data word, time-multiplexes this formatted user message with at least one other user message, and transmits the combined signal. The receiving station (200) receives the transmitted TDMA signal, de-multiplexes the first user message from the other user messages, and equalizes the time delay spread characteristics of the data word portion of the first user message (or a stored version of such) in response to this de-multiplexing. Performing the adaptive equalization process more than once per user time slot provides an even higher data throughout for the system. Storing the first user message in a data buffer permits the adaptive equalization process to be performed in non-real time, thereby lowering the required signal processing data rate in any particular receiver.
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Boehm Douglas A.
Griffin Robert L.
Motorola Inc.
Parmelee Steven G.
Sarli, Jr. Anthony J.
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