Method of synchronizing spread spectrum radio transmitters
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United States of America Patent
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-
Jun 25, 1996
Issued Date -
N/A
app pub date -
Dec 22, 1994
filing date -
Oct 21, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Position determining apparatus including at least one base transmitter/receiver (BTR) station including a base transmitter which periodically transmits timing signals and a plurality of mobile transmitter/receivers (MTR). Each MTR includes a mobile receiver operative to receive timing signals transmitted by at least one base transmitter; synchronization circuitry receiving the timing signals and providing a spread-spectrum frequency-hopping sequence characteristic of the particular MTR; and a mobile transmitter producing a radiated frequency hopped signal responsive to the frequency-hopping sequence and the timing signal.
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