基于DSP和FPGA的短波功放数字预失真算法实现  

The Digital Pre-distortion Algorithm of HF Power Amplifier Based on DSP and FPGA

作　　者：郭雅琴[1] 叶焱[1] 刘太君[1] 李先印 程琪榕 

机构地区：[1]宁波大学信息科学与工程学院,浙江宁波315211

出　　处：《固体电子学研究与进展》2015年第3期296-299,共4页Research & Progress of SSE

基　　金：国家自然科学基金资助项目(61171040);浙江省自然科学基金资助项目(Y1101270)

摘　　要：介绍了宽带跳频短波电台中功率放大器的线性化技术。针对短波通信中功率放大器的多载波宽带信号失真特性,提出基于二维复数增益补偿的查找表模型数字预失真线性化方案,并且通过TI公司的DSP(TMS320C6455)与Altera公司的FPGA(Cyclone EP4CGX150CF2317)混合平台实现短波功放数字预失真算法及整个环路的实时自适应系统。实验结果表明该方案改善短波功放输出信号的邻道功率比(ACPR)达25dB以上,有效补偿了短波功放的非线性失真,大幅度提高了短波电台的通信质量。The power amplifier linearization in broadband and frequency-hopping short-wave radio was introduced.The Lookup Table model was put forward,which was based on the two-dimensional complex gain compensation digital pre-distortion linearization scheme and aimed for the distortion characteristics of multi-carrier wide-band signal.Using DSP(TMS320C6455)from TI and FPGA(Cyclone EP4CGX150CF2317)from Altera,the digital predistortion algorithm and real-time adaptive system for HF power amplifier were realized.Experiment results show that the scheme can improve Adjacent Channel Power Ratio(ACPR)over 25 dB for HF power amplifier′s output signal,compensate for short-wave power amplifier nonlinear distortion effectively,and improve the shortwave radio communication quality greatly.

关 键 词：短波功放 失真特性 数字预失真 查找表 数字信号处理(器) 现场可编程门(图形)阵列 

分 类 号：TN722.75[电子电信—电路与系统] TN92