Spread spectrum communications system for networks
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United States of America Patent
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Feb 18, 1992
Grant Date -
N/A
app pub date -
Aug 23, 1989
filing date -
Aug 23, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Spread spectrum chirps (i.e., wideband frequency packets) are propagated on a local area network in a hostile communications environment, such as a powerline or a crowded radio frequency band. Chirps are self-synchronizing, data bit (or subdata bit) in length and detectable by all network nodes, to allow the contention resolution and collision detection needed to support carrier-sense based network protcols. A matched filter of the same time length and encoding sequence as the transmitted chirp provides the self-synchronized chirp reception at each receiver.
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