Radio communication terminal

Details Radio communication terminal Radio communication terminal

2011-04-19

2011-04-19

Phu, Sanh D (Department: 2618)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S447000, C455S062000, C455S458000, C455S502000, C375S260000, C375S147000

Reexamination Certificate

active

07929990

ABSTRACT:
A radio communication terminal includes a detection unit configured to detect a plurality of usable frequencies of a frequency range, in which the radio communication terminal plans to transmit, at least depending on whether or not a power of a first received signal is greater than a first threshold, a selection unit configured to select, when a first frequency band from f0+f1to f0+f1+Δf1(f1is a first frequency, and Δf1is a first bandwidth) and a second frequency band from f0−f1−Δf1to f0−f1are simultaneously usable with respect to a center frequency f0of a utilizing frequency range including the usable frequencies, the first frequency band and the second frequency band as a pair of utilizing frequency bands, and a transmission unit configured to transmit different signals in the pair of utilizing frequency bands.

REFERENCES:
patent: 2003/0036357 (2003-02-01), McGowan
patent: 2004/0235485 (2004-11-01), Tanaka
patent: 2007/0035040 (2007-02-01), Aoyama
patent: 2009/0268830 (2009-10-01), Birru et al.
patent: 5-14424 (1993-01-01), None
patent: 7-327059 (1995-12-01), None
patent: 2001-267997 (2001-09-01), None
U.S. Appl. No. 11/888,513, filed Aug. 1, 2007, Horiguchi et al.
U.S. Appl. No. 11/827,549, filed Jul. 12, 2007, Horiguchi et al.

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