Apparatus, methods and computer program products for signal acquisition using common demodulation templates
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United States of America Patent
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Nov 18, 2008
Grant Date -
Feb 16, 2006
app pub date -
Aug 16, 2004
filing date -
Aug 16, 2004
priority date (Note) -
Expired
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Abstract
A target modulation is detected in a signal, e.g., a radio signal received by a device such as a mobile communications terminal. Respective target modulation correlations for respective carrier timing hypotheses are determined by demodulating signal values corresponding to the signal for the respective carrier timing hypotheses using a common carrier demodulation template and detecting the target modulation from the target modulation correlations. The target modulation may be, for example, a pseudonoise (PN) code, such as a GPS code or a CDMA communications system code, and the carrier timing hypotheses may correspond to various potential Doppler shifts.
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