A 10-MHz Signal Bandwidth Cartesian Loop Transmitter Capable of Off-Chip PA Linearization

Ishihara H.Hosoya M.Otaka S.Watanabe O.

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A 10-MHz Signal Bandwidth Cartesian Loop Transmitter Capable of Off-Chip PA Linearization

机译：A 10-MHz Signal Bandwidth Cartesian Loop Transmitter Capable of Off-Chip PA Linearization

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摘要

This paper presents a wide signal bandwidth Cartesian loop transmitter (CLT) IC for off-chip PA linearization. The CLT can linearize a 10 MHz bandwidth signal by using a feedforward technique to avoid instability caused by a time delay of an RF path. The transmitter is fabricated in 0.13 $mu$m CMOS technology. ACLR is improved from 30.2 dB to 38.4 dB and EVM is improved from 5.9 to 1.6 by using the feedback loop when 10 MHz OFDM signal is applied. The fabricated IC also realizes automatic phase and amplitude calibration by using on-chip amplitude and phase difference detector and external controller and result storage. The controller and result storage are realized by the FPGA. The calibration can be finished in 14 $mu$sec.

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来源
《IEEE Journal of Solid-State Circuits》 |2010年第12期|2785-2793|共9页
作者
Ishihara H.Hosoya M.Otaka S.Watanabe O.;
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作者单位

Wireless System Laboratory, Corporate Research & Development Center, Toshiba Corporation, Kawasaki, Japan;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类
关键词
802.16e; CMOS integrated circuits; Cartesian loop; feedback; feedforward; linearization; power amplifier (PA); transmitter;

A 10-MHz Signal Bandwidth Cartesian Loop Transmitter Capable of Off-Chip PA Linearization

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