GPS signal acquisition circuit
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United States of America Patent
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Issued Date -
Sep 25, 2008
app pub date -
Mar 22, 2007
filing date -
Mar 22, 2007
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A GPS signal acquisition circuit includes a correlation engine, a decimator, a coherent integrator and an incoherent integrator. An over sampled GPS signal is fed into and processed by the correlation engine. The processed signal is sent to the decimator. The decimator generates an output for every M input from the correlation engine. When the decimated correlation engine output is processed in subsequent coherent and incoherent accumulations, the size of the memory required for high-sensitivity signal processing is greatly reduced. Therefore, the production cost can be lowered significantly.
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