Bit down-scaling apparatus and method, GPS synchronization...

Details Bit down-scaling apparatus and method, GPS synchronization... Bit down-scaling apparatus and method, GPS synchronization...

2005-02-25

2008-12-30

Liu, Shuwang (Department: 2611)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S150000, C375S342000, C370S320000, C370S335000, C370S342000, C370S441000, C370S479000, C708S300000, C708S422000, C708S813000, C708S819000

Reexamination Certificate

active

07471747

ABSTRACT:
The n-to-m bit down-scaling correlates a plurality of n-bit correlation integral values into a plurality of m-bit data (n>m). The n-bit correlation integral values are obtained by correlating global positioning system (GPS) signals with a plurality of expected codes. Upper (n−m+1) bits are selected from the n-bit correlation integral values, and (n−m+1)-bit estimated absolute values are obtained. A significant bit of a maximum value of the upper (n−m+1) bits of the estimated absolute values is selected. A scale level is obtained based on the significant bit of the maximum value. The n-bit correlation integral values are down-scaled into the m-bit data based on the scale level. The amount of n-bit correlation integral values is reduced into m-bit correlation integral values by the down-scaling method, and thereby reducing a size of the memory for storing the correlation integral values.

REFERENCES:
patent: 5861841 (1999-01-01), Gildea et al.
patent: 6275186 (2001-08-01), Kong
patent: 6754256 (2004-06-01), Kubo et al.
patent: 6775319 (2004-08-01), King et al.
patent: 7184464 (2007-02-01), Abraham et al.
patent: 2001/0014116 (2001-08-01), Saito et al.
patent: 2002/0159542 (2002-10-01), Kokkonen et al.
patent: 2005/0180531 (2005-08-01), Wellig et al.
patent: 2005/0190735 (2005-09-01), Shinoda
patent: 1 262 791 (2002-12-01), None
patent: 9-15320 (1997-01-01), None
patent: 2000-131415 (2000-05-01), None

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