A polar transmitter using a linear-assisted delta-modulation envelope-amplifier for WCDMA applications

Kazuaki Kunihiro, Kiyohiko Takahashi, Shingo Yamanouchi, Tomohisa Hirayama, Hikaru Hida, Shin Ichi Tanaka

研究成果: Conference contribution

8 被引用数 (Scopus)

抄録

A polar transmitter using a new linear-assisted delta-modulation (LADM) envelope-amplifier has been developed for WCDMA applications. The LADM system is composed of a highly efficient switching block based on a 200-MHz-clock delta-modulator, which is implemented in a 0.18-μm CMOS IC, and a highly accurate linear block. In the LADM approach, the residual quantization noise and distortion of switching amplification are removed through the assistant linear process; thus, a sufficiently low ACPR of -45 dBc and a small EVM of 1.7% can be achieved without a pre-distortion technique. The developed polar transmitter nearly doubles the average efficiency in the 10- to 15-dB back-off region of class-AB PAs.

本文言語English
ホスト出版物のタイトルProceedings of the 36th European Microwave Conference, EuMC 2006
出版社IEEE Computer Society
ページ137-140
ページ数4
ISBN(印刷版)2960055160, 9782960055160
DOI
出版ステータスPublished - 2006 1月 1
外部発表はい
イベント36th European Microwave Conference, EuMC 2006 - Manchester, United Kingdom
継続期間: 2006 9月 102006 9月 12

出版物シリーズ

名前Proceedings of the 36th European Microwave Conference, EuMC 2006

Conference

Conference36th European Microwave Conference, EuMC 2006
国/地域United Kingdom
CityManchester
Period06/9/1006/9/12

ASJC Scopus subject areas

  • 電子工学および電気工学
  • 凝縮系物理学
  • 放射線

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