Communications: directive radio wave systems and devices (e.g. – Directive – Position indicating
Reexamination Certificate
2007-12-25
2007-12-25
Tarcza, Thomas H. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Position indicating
C342S458000, C342S463000
Reexamination Certificate
active
10577779
ABSTRACT:
There is provided a radio base station apparatus which is capable of increasing the probability of detection of a first path even if a radio transmission path fluctuates due to fading or the like, and of downsizing and reducing the cost of mobile radio terminal apparatus. SIR estimators13-1through13-N calculate reception SIRs for respective subcarriers from output signals from pilot demodulators12-1through12-N. SIR averager14averages the SIRs for the respective subcarriers to calculate an SIR for the overall signal. Based on the calculated SIR, threshold value setting unit15sets a threshold value for a path search. First path detector19conducts a path search based on the threshold set by threshold value setting unit15. Arrival time calculator21calculates an arrival time based on a first path detected by first path detector19.
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Dickstein , Shapiro, LLP.
Mull Fred H.
NEC Corporation
Tarcza Thomas H.
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