一种数字预失真和峰均比削峰法联合优化方法研究  

Study on Joint Optimization Method of Digital Predistortion and PAPR Clipping

作　　者：高浩楠 张涛[1] 李聪颖 GAO Haonan;ZHANG Tao;LI Congying(The 54th Research Institute of China Eectronics Tchnology Group Corporation,Shijiazhuang 050081,China;Naval Research Institute of PLA,Beijing 100016,China)

机构地区：[1]中国电子科技集团公司第54研究所,石家庄050081 [2]中国人民解放军海军研究院,北京100016

出　　处：《计算机测量与控制》2025年第2期278-285,共8页Computer Measurement &Control

摘　　要：现代信息通信技术飞速发展,单一数字预失真技术或峰均比抑制方法无法最大化减少信号的非线性失真,提高发射机能效;通过对数字预失真和峰均比限幅法联合算法的研究,分别优化预失真系统的功率放大器建模和限幅系统的信号处理方式,进一步提高功率放大器工作效率;对功放行为模型建模引入更多记忆效应特性,经实验测试归一化均方误差可降低19.87 dB;采用阈值分解技术处理输入信号并测试削峰法对信号峰均比的抑制效果,实验结果左边带ACPR值下降19.72 dBc,右边带ACPR下降17.46 dBc,峰均比下降2.54 dB,满足了精确描述信号的记忆效应的要求,降低了功率放大器非线性失真和峰均比。With the rapid development of modern information and communication technology,single digital predistortion technique or peak-to-average power ratio(PAPR)suppression method can not maximize the reduction of nonlinear distortion in signals and improve transmitter efficiency.By studying the joint algorithm for digital predistortion and PAPR limiting,the power amplifier modeling of the pre distortion system and the signal processing method of the clipping system are optimized,further enhancing the power amplifier s operational efficiency.More memory effects are introduced into the power amplifier behavioral model.Experimental testing shows that the normalized mean square error decreases by 19.87 dB.Threshold decomposition technology is used to process input signals,and test the suppression effect of PAPR on signals by the peak clipping method.Experimental results show that the left-side adjacent channel power ratio(ACPR)decreases by 19.72 dBc,the right-side ACPR decreases by 17.46 dBc,and the PAPR is reduced by 2.54 dB,which meets the requirements for accurately describing the signal s memory effect,and reduces the nonlinear distortion of power amplifier and PAPR.

关 键 词：数字预失真 功率放大器 峰均比 削峰 阈值矢量分解 

分 类 号：TP331.2[自动化与计算机技术—计算机系统结构]