Efficient multipath centroid tracking circuit for a code division multiple access (CDMA) system
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United States of America Patent
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Jun 1, 2004
Grant Date -
Aug 8, 2002
app pub date -
Feb 8, 2002
filing date -
Jun 30, 1995
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Abstract
A device tracks multipath components of a spread-spectrum signal. The spread-spectrum signal has an associated chip code sequence. The device receives multipath components of the spread-spectrum signal. A first and second plurality of multipath components are despread about a center code phase. The first plurality is a sequence of multipath components prior to the center code phase and the second plurality is a sequence of multipath components after the center code phase. A first and second combined energy is determined from the first and second plurality of multipath components. A tracking delay is calculated based on a difference between the first and the second combined energies. The center code phase is adjusted by said tracking delay.
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