Telecommunications – Transmitter – Diversity
Reexamination Certificate
2007-07-05
2011-12-06
Vuong, Quochien B (Department: 2618)
Telecommunications
Transmitter
Diversity
C455S115300, C455S127200, C375S297000, C375S299000
Reexamination Certificate
active
08073405
ABSTRACT:
A MIMO transmitter capable of highly efficient power amplification over a wide dynamic range or for a high PAPR signal. In the MIMO transmitter (100), an amplifier (150) amplifies an input signal and outputs the amplified signal to an antenna (170). An amplifier (160) amplifies an input signal and outputs the amplified signal to an antenna (180). A peak detection part (130) detects an envelope of a first transmission sequence. A branch switching part (140) switches over to input all of the first transmission sequence to the amplifier (150) or to input part of the first transmission sequence together with a second transmission sequence to the amplifier (160) based on comparison results between the envelope detection result of the first transmission sequence and a threshold value. This constitution can reduce a peak of the input signal of the amplifier, and thus the amplifier can be efficiently used. As a result, the MIMO transmitter capable of highly efficient power amplification for a high PAPR signal and the like can be realized.
REFERENCES:
patent: 7340228 (2008-03-01), Monroe et al.
patent: 7706250 (2010-04-01), Olgaard et al.
patent: 2005/0239488 (2005-10-01), Ebiko
patent: 2004-173258 (2004-06-01), None
patent: 2005-525727 (2005-08-01), None
patent: 2006-311485 (2006-11-01), None
patent: 2006-345066 (2006-12-01), None
patent: 2007-158913 (2007-06-01), None
patent: 2003/065573 (2003-08-01), None
International Search Report, mailed Aug. 7, 2007, issued in corresponding International Application No. PCT/JP2007/063488, filed Jul. 5, 2007.
Panasonic Corporation
Seed IP Law Group PLLC
Vuong Quochien B
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