Title:
REDUCING MEMORY USAGE IN NONCOHERENT SIGNAL PROCESSING
Document Type and Number:
WIPO Patent Application WO2004070413
Kind Code:
A3
Abstract:
A method for detecting a positioning signal includes (a) correlating a segment of a received positioning signal with a reference signal of a selected code phase and frequency to obtain a correlation value, (b) if the correlation value is less than a predetermined minimum, assigning the correlation value to the predetermined minimum, and (c) accumulating the correlation value in a sum of correlation values obtained using other segments of the received positioning signal. In addition, the correlation value may be reduced by a predetermined value, which is preferably an expected mean value for a noise component in the segment of the received positioning signal.
Inventors:
BASCH JULIEN (US)
CHOU ANDREW (US)
LORENZ ROBERT (US)
STONE JESSE (US)
CHOU ANDREW (US)
LORENZ ROBERT (US)
STONE JESSE (US)
Application Number:
PCT/US2004/002094
Publication Date:
November 11, 2004
Filing Date:
January 26, 2004
Export Citation:
Assignee:
SIRF TECH INC (US)
BASCH JULIEN (US)
CHOU ANDREW (US)
LORENZ ROBERT (US)
STONE JESSE (US)
BASCH JULIEN (US)
CHOU ANDREW (US)
LORENZ ROBERT (US)
STONE JESSE (US)
International Classes:
G01S1/00; H04B1/707; (IPC1-7): G01S1/00; H04B1/707
Foreign References:
| US20020175857A1 | 2002-11-28 | |||
| US6028887A | 2000-02-22 | |||
| US6452961B1 | 2002-09-17 | |||
| EP1143674A2 | 2001-10-10 |
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