SSPA自适应预失真器的设计方案  

Design of Adaptive Pre-distorter for Solid-state Power Amplifier

作　　者：朱雪琼[1] 林其伟[1] 

机构地区：[1]华侨大学信息科学与工程学院,福建厦门361021

出　　处：《通信技术》2011年第12期27-29,共3页Communications Technology

摘　　要：OFDM技术具有传输效率高和有效对抗多径衰落的优点,已经成为无线局域网标准的一部分。但OFDM信号有较大的峰值平均功率比,要求功率放大器具有很大的线性动态范围,否则直接影响着整个系统的运行成本和效率。针对固态功率放大器,提出了一种改进的基于查找表的自适应预失真方案。仿真结果表明,该方案有效地抑制了谐波分量和互调失真,对HPA的非线性有一定的改善,并且有效利用了硬件存储资源和提高了硬件运行速度。OFDM technology, for its inherent technical advantages in combating multipath fading and high resource utilization, becomes a part of WLAN standards. However, for its high PAPR, OFDM requires great linear dynamic range in HPA, or otherwise would result in high operating costs and lower operating efficiency. The paper, aiming at the special type of power amplifier, such as SSPA, proposes a new pre-distorter structure based on LUT, The simulation shows that the proposed scheme could effectively restrain the harmonic component and intermodulation distortion, save hardware storage resources, and raise running speed.

关 键 词：正交频分复用 固态功率放大器 非线性失真 数字预失真器 

分 类 号：TN919.8[电子电信—通信与信息系统]