処理中

しばらくお待ちください...

設定

設定

出願の表示

1. US20060189282 - Transmitter for suppressing a variation in input level of a multicarrier signal

官庁 アメリカ合衆国
出願番号 10532338
出願日 20.10.2003
公開番号 20060189282
公開日 24.08.2006
特許番号 7489907
特許付与日 10.02.2009
公報種別 B2
IPC
H04B 1/00
H電気
04電気通信技術
B伝送
1グループH04B3/00~H04B13/00の単一のグループに包含されない伝送方式の細部;伝送媒体によって特徴づけられない伝送方式の細部
H04B 7/00
H電気
04電気通信技術
B伝送
7無線伝送方式,すなわち放射電磁界を用いるもの
H04L 27/26
H電気
04電気通信技術
Lデジタル情報の伝送,例.電信通信
27搬送波変調方式
26多周波符号を用いる方式
CPC
H04L 27/2614
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27Modulated-carrier systems
26Systems using multi-frequency codes
2601Multicarrier modulation systems
2614Peak power aspects
出願人 Hitachi Kokusai Electric Inc.
発明者 Hasegawa Norio
Miyatani Tetsuhiko
Kawai Hisashi
Yoshida Masami
Watanabe Jun
代理人 Jacobson Holman PLLC
優先権情報 2002307907 23.10.2002 JP
発明の名称
(EN) Transmitter for suppressing a variation in input level of a multicarrier signal
要約
(EN)

A transmitter for averagedly suppressing the variation in input level of an amplifier according to variation in carrier level. The transmitter includes an input power calculation section for calculating mean input power of each carrier, an output power calculating section for calculating mean output power of each carrier after the carrier band is limited, a monitoring section for identifying a carrier having the maximum mean input power, acquiring the maximum value, acquiring the mean output power of the identified carrier, determining the ratio of the mean input power to the mean output power, and calculating level control information which is the ratio of the ratio determined above to a predetermined expected value, and a signal level adjusting section for adjusting the level of a multicarrier signal by multiplying the level control information outputted from the monitoring section.