Title:
TRANSMITTER APPARATUS
Document Type and Number:
WIPO Patent Application WO/2005/002099
Kind Code:
A1
Abstract:
A transmitter apparatus wherein the peak level of a signal to be transmitted can be effectively reduced. Peak factor producing means (31-35) produces a peak factor in accordance with a ratio of a level threshold of the signal to the peak level thereof so as to determine the peak of the signal. Peak reduction coefficient producing means (36,37) produces, as a peak reduction coefficient, a result of weighting, by use of a predetermined window function, the peak factor produced by the peak factor producing means. Signal level reduction means (25,26) reduces the level of the signal by use of the peak reduction coefficient produced by the peak reduction coefficient producing means.
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Inventors:
HASEGAWA NORIO (JP)
MIYATANI TETSUHIKO (JP)
OKADA TAKASHI (JP)
AKAIWA YOSHIHIKO (JP)
MIYATANI TETSUHIKO (JP)
OKADA TAKASHI (JP)
AKAIWA YOSHIHIKO (JP)
Application Number:
PCT/JP2004/007868
Publication Date:
January 06, 2005
Filing Date:
May 31, 2004
Export Citation:
Assignee:
HITACHI INT ELECTRIC INC (JP)
HASEGAWA NORIO (JP)
MIYATANI TETSUHIKO (JP)
OKADA TAKASHI (JP)
AKAIWA YOSHIHIKO (JP)
HASEGAWA NORIO (JP)
MIYATANI TETSUHIKO (JP)
OKADA TAKASHI (JP)
AKAIWA YOSHIHIKO (JP)
International Classes:
H04L27/36; H04B1/707; H04J1/00; H04J11/00; H04J13/00; H04L27/26; (IPC1-7): H04J1/00
Foreign References:
| JP2002044054A | 2002-02-08 | |||
| JPH09139679A | 1997-05-27 | |||
| JPH0918535A | 1997-01-17 |
Attorney, Agent or Firm:
Moriyama, Tatsuo (7-10 Ebisu-nishi 2-chom, Shibuya-ku Tokyo 21, JP)
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