Portable information communication terminal, program, and...

Pulse or digital communications – Spread spectrum – Direct sequence

Reexamination Certificate

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C370S319000, C370S320000, C370S321000, C370S330000, C370S335000, C342S150000, C342S151000, C342S152000, C342S153000, C342S154000, C342S193000, C342S194000, C342S196000, C333S151000, C333S152000, C333S153000, C333S154000, C333S155000, C333S193000, C333S194000, C333S196000

Reexamination Certificate

active

10845705

ABSTRACT:
The number of times for averaging operation for averaging a correlation value of a received signal and a reference signal is properly controlled. When the correlation value is not averaged, since a lower limit value TH_A of a correlation level of a distribution of timings of which a path exists is larger than an upper limit value TH_B of a correlation level of a distribution of timings of which a path does not exist, the correlation value of a path is hidden by noise. Since the averaging operation is repeated until the relation of TH_A>TH_B is satisfied, the averaging operation is stopped when the relation is satisfied. The TH_A and TH_B are decided in accordance with RSCP and ISCP of a pilot channel and RSSI of a received base band signal.

REFERENCES:
patent: 6922433 (2005-07-01), Tamura
patent: 7010019 (2006-03-01), Reial
patent: 7039099 (2006-05-01), Tamura et al.
patent: 7042862 (2006-05-01), Hirade
patent: 7133467 (2006-11-01), Nishio et al.
patent: 7151792 (2006-12-01), Shimizu et al.
patent: 7209512 (2007-04-01), Jitsukawa et al.
patent: 2002/0003791 (2002-01-01), Hayata
patent: 2004/0142729 (2004-07-01), Yuda et al.
patent: 1 067 700 (2001-01-01), None

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