Despreading circuit
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United States of America Patent
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Oct 21, 2003
Grant Date -
May 2, 2002
app pub date -
Sep 7, 2001
filing date -
Apr 14, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
A despreading circuit which can reduce a circuit scale and power consumption is described. The circuit includes an A/D converter which converts a CDMA modulated analog signal to a digital signal of N bits, and a searcher which defects a synchronization phase from high-order small bits of the N bits and outputs synchronozation phase information to a control circuit. The control circuit transmits a signal for allowing despreading to be performed to a sliding correlator based on the phase information. The sliding correlator despreads the N bit digital signal outputted by the A/D converter and outputs the resulting correlation output as a despreading signal.
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