Method of cross-correlation and continuous wave interference...

Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite

Reexamination Certificate

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C342S107000, C342S115000, C342S386000, C375S343000

Reexamination Certificate

active

07436356

ABSTRACT:
A method for processing weak indoor signals in presence of cross-correlation or continuous wave interference and associated GPS receiver are provided. The method comprises providing a two-dimensional delay-Doppler accumulated power pattern having a plurality of accumulated powers corresponding to frequency and time; for a predetermined frequency, determining an average value of accumulated powers of the two-dimensional delay-Doppler accumulated power pattern over a plurality of times; and subtracting the average value from the accumulated powers used in determining the average at the frequency over the plurality of times to generate a delay-Doppler accumulated power pattern with suppressed interference effect.

REFERENCES:
patent: 4785463 (1988-11-01), Janc et al.
patent: 5657022 (1997-08-01), Van Etten et al.
patent: 6236354 (2001-05-01), Krasner
patent: 2005/0168382 (2005-08-01), Awata
patent: 2005/0225483 (2005-10-01), Abraham et al.
patent: 2005/0238087 (2005-10-01), Yang et al.
Phillip Ward. “GPS Satlellite Signal Characteristics”, Understanding GPS: Principles and Applications, pp. 83-97, Chapter 4.

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