Method and apparatus for computing SIR of time varying...

Details Method and apparatus for computing SIR of time varying... Method and apparatus for computing SIR of time varying...

2005-12-14

2008-09-02

Odom, Curtis B (Department: 2611)

Pulse or digital communications

Receivers

Interference or noise reduction

C702S069000

Reexamination Certificate

active

07421045

ABSTRACT:
A method and apparatus for correcting symbols of a common pilot channel (CPICH) to generate an accurate signal-to-interference ratio (SIR) estimate in a wireless communication system are disclosed. In one embodiment, a non-stationary mean of a group of the CPICH symbols is estimated, the CPICH symbols are delayed, and the CPICH symbols are corrected by dividing the delayed CPICH symbols by the estimated non-stationary mean of the group of CPICH symbols. In another embodiment, a signal power estimate is generated based on the magnitude of CPICH symbols, a noise power estimate is generated by subtracting the signal power estimate from a total power estimate based on the magnitude of the CPICH symbols, and a SIR estimate is generated for symbols that have undergone a time varying gain by dividing the signal power estimate by the noise power estimate.

REFERENCES:
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patent: 2002/0196879 (2002-12-01), Iochi
patent: 2003/0185179 (2003-10-01), Inogai et al.
patent: 2004/0093178 (2004-05-01), Shin et al.
patent: 2004/0228272 (2004-11-01), Hasegawa et al.
patent: 2004/0264591 (2004-12-01), Malm et al.

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