Telecommunications Science ›› 2010, Vol. 26 ›› Issue (8): 59-65.doi: 10.3969/j.issn.1000-0801.2010.08.013

• research and development • Previous Articles     Next Articles

Digital Predistortion Technique and Its Development

Xiaohu Shen,Hao Jin,Demiao Wang   

  1. Zhejiang University, Hangzhou 310027,China
  • Online:2010-08-15 Published:2010-08-15

Abstract:

In today's mobile communication systems, the design of power amplifier is becoming more challenging because the modulated RF signal high PAR(peak average ratio)must be amplified linearly so as to lower ACPR(adjacent channel power ratio) and EBR(error bit rate). In addition, the power consumption needs to be reduced to minimum. The digital predistortion technique is becoming an increasingly attractive solution to these problems, due to its excellent linearization capability and flexible application. In this paper, the basic concepts of DPD are illustrated, including the models and corresponding implementations. We believe the application of DPD to Doherty PA will be the most promising technique.

Key words: digital predistortion, doherty power amplifier, memory effec, memory effect, non-linear effect

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