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ARTICLES

Design of a Predistortion HPA Using a Frequency Up-conversion Mixing Operation

In this article, a new predistortion linearizing method using the frequency up-conversion operation of a microwave mixer is proposed. This linearizing method does not require any additional signal source in spite of the frequency up-conversion mixing o...
Yong-Chae Jeong, Chonbuk National University; Young Kim, Kumoh National Institute of Technology; Chul D. Kim, Sewon Teletech Inc.
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Mobile communication systems currently use linear modulation schemes for effective usage of the frequency spectrum resource. Signals that use linear modulation schemes, however, such as QPSK, and 16- and 64-QAM, have a high peak-to-average power ratio and the signal envelope is changed severely. Therefore, modern mobile communication systems require...
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