Cancellation system and method for a wireless positioning system
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United States of America Patent
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Feb 8, 2011
Grant Date -
N/A
app pub date -
May 2, 2000
filing date -
May 2, 2000
priority date (Note) -
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Abstract
A cancellation system that delays received Global Positioning System (“GPS”) signals and cancels less than all of the received GPS signals from the delayed version of the received GPS signals. A delay circuit produces a delayed version of the received GPS signals and a demodulator and despreader unit produces a demodulated and despread GPS signal corresponding to one of the received GPS signals. A respreader and remodulator unit produces a remodulated and respread GPS signal from the demodulated and despread GPS signal and a combiner produces a combined GPS signal from the delayed version of the received GPS signals and the remodulated and respread GPS signal. The cancellation system and method may also store the received GPS signals and cancel less than all the received GPS signals from the stored version of the received GPS signals.
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