Telecommunications – Transmitter – Power control – power supply – or bias voltage supply
Reexamination Certificate
2011-06-28
2011-06-28
Nguyen, Lee (Department: 2618)
Telecommunications
Transmitter
Power control, power supply, or bias voltage supply
C455S069000, C455S522000
Reexamination Certificate
active
07970363
ABSTRACT:
A terminal of a communication system includes a power amplifier, an open-loop power controller, a gain controller, a modulator, and a digital/analog converter. The power amplifier amplifies transmission power of a transmission signal. The open-loop power controller measures a received signal strength to control the transmission power, and increases a gain of the power amplifier according to the received signal strength. The gain controller sets a power concentration gain and applies the power concentration gain to the transmission signal when the gain of the power amplifier is maximized. The modulator modulates the transmission signal. The digital/analog converter converts an input signal to an analog signal. The gain controller applies the power concentration gain to the trans mission signal modulated by the modulator, and transmits the power concentration gain to the digital/analog converter.
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Xiaoyu Fu and Hlaing Minn, Initial Uplink Synchronization and Power Control (Ranging Process) for OFDMA Systems, Globecom 2004, Communications Society, pp. 3999-4003, 2004 IEEE, Dallas, Texas.
Kim Dae-Ho
Kim Jun-Woo
Park Hyeong-Sook
Park Youn-Ok
Sohn Kyung-Yeol
Electronics and Telecommunications
Hanaro Telecom, Inc.
Jefferson IP Law, LLP
KT Corporation
Nguyen Lee
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