公开(公告)号：US09306506B1

公开(公告)日：2016-04-05

申请号：US14552306

申请日：2014-11-24

Applicant: Analog Devices Global

Inventor： Yong Zhang ,  Joseph Brad Brannon ,  John P. Oates ,  Guanghua Man ,  Gina G. Colangelo

IPC: H03F1/32 ,  H03F3/21 ,  H03F3/19

CPC classification number: H03F1/3247 ,  H03F1/3241 ,  H03F1/34 ,  H03F3/19 ,  H03F3/24 ,  H03F3/245 ,  H03F2200/171 ,  H03F2200/451 ,  H03F2201/3215 ,  H04B1/0475 ,  H04B2001/0425 ,  H04B2001/0433

Abstract: Apparatus and methods for dual loop power amplifier digital pre-distortion systems are disclosed. In certain implementations, a dual DPD system includes a first digital pre-distorter (DPD) and a second DPD. A digital IF upconverter electrically coupled between the first and second DPDs separates the DPD system into independently controlled fine and coarse sections. The adaptive adjustment processor can be used to modify or pre-distort input signals in order to compensate for the power amplifier nonlinearity. It also controls the fine DPD section to correct an RF output signal single-band adjacent channel leakage ratio (ACLR), while it controls the coarse DPD section to correct an RF output signal dual band intermodulation distortion (IMD).

Abstract translation: 公开了用于双环功率放大器数字预失真系统的装置和方法。 在某些实现中，双DPD系统包括第一数字预失真器（DPD）和第二DPD。 电耦合在第一和第二DPD之间的数字IF上变频器将DPD系统分离成独立控制的精细和粗糙部分。 自适应调整处理器可用于修改或预失真输入信号，以补偿功率放大器的非线性。 它还控制精细的DPD部分来校正RF输出信号单频带相邻信道泄漏比（ACLR），同时它控制粗DPD部分以校正RF输出信号双频带互调失真（IMD）。