Method and apparatus for eliminating narrow band...

Details Method and apparatus for eliminating narrow band... Method and apparatus for eliminating narrow band...

2005-12-16

2011-11-29

Payne, David C. (Department: 2611)

Pulse or digital communications

Spread spectrum

C329S318000, C329S349000, C332S107000, C375S148000, C375S346000, C455S063100

Reexamination Certificate

active

08068531

ABSTRACT:
A device and method for eliminating narrow-band interference by windowing in a spread spectrum system are disclosed. The method comprises extracting N sampling points of data to perform frequency spectrum transform each time and obtaining N points of data; updating control information, comparing the energy values of the N points with the threshold within the set time period to determine the number of narrow-band interference as well as the width and location of the interference; determining the corresponding frequency domain adjusting window based on the width and location of the narrow band interference, obtaining the points within the window and the adjusted values of those points; with regard to the transformed N points during interference elimination process, setting the energy values of the points within the window during the current time period and the last period as the corresponding adjusted values, outputting the points after frequency spectrum inverse transform.

REFERENCES:
patent: 5612978 (1997-03-01), Blanchard et al.
patent: 6868114 (2005-03-01), Bially et al.
patent: 1 176 731 (2002-01-01), None
patent: 02/091610 (2002-11-01), None
patent: 2005/107088 (2005-11-01), None
patent: 2006/092093 (2006-09-01), None
European Search Report in corresponding EPO Application, Application No. EP 05 82 3414, mailed Mar. 4, 2010.

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