Method and apparatus for performing interference estimation

Details Method and apparatus for performing interference estimation Method and apparatus for performing interference estimation

2008-03-25

2008-03-25

Ahn, Sam K. (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

Reexamination Certificate

active

10009127

ABSTRACT:
The present invention relates to a method and apparatus for performing an interference estimation in a spread spectrum system using a plurality of spreading codes with different code lengths, wherein the interference estimate is obtained based on a variance estimate of despread samples integrated over a predetermined code period over which said plurality of spreading codes are orthogonal. Thereby, an unbiased interference estimation with high accuracy and proper consideration of code orthogonality can be obtained.

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F. Adachi et al., “Tree-structured generation of orthogonal spreading codes with different lengths for forward link of DS-CDMA mobile radio”, Electronics Letters, Jan. 2, 1997, vol. 33 No. 1, p. 27-28.

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