Young Yun Woo, Youngoo Yang, Jaehyok Yi, Joongjin Nam, Jeonghyeon Cha and Bumman Kim

Articles by Young Yun Woo, Youngoo Yang, Jaehyok Yi, Joongjin Nam, Jeonghyeon Cha and Bumman Kim

An Adaptive Feedforward Amplifier for WCDMA Base Stations Using Imperfect Signal Cancellation

This article describes a new adaptive feedforward amplifier for a WCDMA system using an imperfect signal cancellation. Due to the complicated signal statistics, the distortion generated by the error amplifier is significantly reduced by an imperfect si...

April 1, 2003

Young Yun Woo, Youngoo Yang, Jaehyok Yi, Joongjin Nam, Jeonghyeon Cha and Bumman Kim

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As wireless systems evolve from second- to third- or fourth-generation, the linearity, efficiency and bandwidth requirements for power amplifiers become more stringent. Many techniques, including feedforward, envelope feedback and manifold types of predistorters, have been employed to effectively satisfy these performance requirements and to reduce the production costs for...