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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...
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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