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Title:
WIRELESS TRANSMISSION APPARATUS AND TRANSMISSION POWER CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2010/146867
Kind Code:
A1
Abstract:
Disclosed are a wireless transmission apparatus and transmission power control method which improve the error rate characteristics of data signals even when the number of streams of data signals increases, without increasing the amount of signaling. The relationship between the number of streams of data signals in each antenna (201-1, 201-2) and the data signal and pilot-signal transmission power ratio at each antenna (201-1,201-2) is stored. Specifically, a relationship where the data signal and pilot signal transmission power ratio at each antenna increases as the number of streams of data signals at each antenna increases is stored. A transmission power control unit (205) determines the data signal and pilot signal transmission power ratio on the basis of the information of the number of streams of data signals at each antenna (201-1, 201-2) that were output from a decoding unit (204), controls the transmission power of the pilot signals on the basis of the determined transmission power ratio, and outputs to a multiplexing unit (210).

Inventors:
OGAWA YOSHIHIKO
MIYOSHI KENICHI
NISHIO AKIHIKO
IMAMURA DAICHI
NAKAO SEIGO
Application Number:
PCT/JP2010/004053
Publication Date:
December 23, 2010
Filing Date:
June 17, 2010
Export Citation:
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Assignee:
PANASONIC CORP (JP)
OGAWA YOSHIHIKO
MIYOSHI KENICHI
NISHIO AKIHIKO
IMAMURA DAICHI
NAKAO SEIGO
International Classes:
H04J99/00
Domestic Patent References:
WO2006129661A12006-12-07
WO2006106862A12006-10-12
Foreign References:
JP2005073221A2005-03-17
Attorney, Agent or Firm:
WASHIDA, KIMIHITO (JP)
Koichi Washida (JP)
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