A W-band high-power predistorted direct-conversion digital modulator for transmitter applications
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Date
2005-09-01
Authors
Hong-Yeh Chang
Jeng-Han Tsai
Tian-Wei Huang
Huei Wang
Yongxiang Xia
Yonghui Shu
Journal Title
Journal ISSN
Volume Title
Publisher
IEEE Microwave Theory and Techniques Society
Abstract
This letter presents a W-band high-power direct-conversion transmitter using digital predistortion techniques for digital modulation applications. The transmitter is a direct-conversion configuration that employs a reflection-type IQ modulator module and a power amplifier module. With the predistortion function in digital signal processing (DSP), this transmitter demonstrated an output channel power of greater than 19 dBm, and the adjacent channel power ratio (ACPR) was improved by 10 and 18 dB for QPSK and π/4-DQPSK modulation, respectively. To the best of our knowledge, this is the first demonstration of linearization techniques for W-band high-power digital modulation transmitters.