A W-band high-power predistorted direct-conversion digital modulator for transmitter applications

Hong Yeh Chang, Jeng Han Tsai, Tian Wei Huang, Huei Wang, Yongxiang Xia, Yonghui Shu

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


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.

Original languageEnglish
Pages (from-to)600-602
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Issue number9
StatePublished - Sep 2005


  • Linearization
  • Millimeter-wave (MMW)
  • Quadrature amplitude modulation (QAM)
  • Quadrature phase shift keying (QPSK)
  • W-band direct-conversion transmitter


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