Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2005-05-13
2008-09-02
Ghayour, Mohammad (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S147000, C375S227000, C375S350000, C375S346000
Reexamination Certificate
active
07421009
ABSTRACT:
A noise power estimation apparatus is disclosed. The noise power estimation apparatus includes: a part for calculating correlation between a received signal and a pilot signal so as to obtain a received power of the pilot signal for each path; a part for removing a multipath interference component from the received power of the pilot signal by using a predetermined power ratio between the pilot signal and a data signal so as to obtain a corrected received power of the pilot signal; a part for estimating an estimated total power of the pilot signal and the data signal included in the received signal based on the corrected received power and the predetermined power ratio; and a part for subtracting the estimated total power from a total power of the received signal so as to obtain a noise power.
REFERENCES:
patent: 2002/0191535 (2002-12-01), Sugiyama et al.
patent: 2004/0076224 (2004-04-01), Onggosanusi et al.
patent: 1 176 730 (2002-01-01), None
patent: 1 337 054 (2003-08-01), None
patent: 2003-124907 (2003-04-01), None
Higuchi Kenichi
Kawamoto Junichiro
Maeda Noriyuki
Sawahashi Mamoru
Ghayour Mohammad
NTT DoCoMo Inc.
Vlahos Sophia
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