CAJ | 학술논문

数字预失真技术是有效补偿射频功率放大器的非线性方案；然而，前向数据与反馈数据之间的延时估计是数字预失真系统的关键性问题，直接影响着非线性的补偿能力。在此基于滑动窗的相关运算，介绍一种整数倍的环路延时估计算法，同时基于 LMS迭代逐个数据输入进行比较，提出了一种自适应小数倍的环路延时估计算法。最后对算法进行仿真验证，结果表明，经过整数倍的环路延时估计后，对于在[-Ts,Ts 范围内的残余的小数倍延时，该算法均表现出优异的估计性能。]
수자예실진기술시유효보상사빈공솔방대기적비선성방안；연이，전향수거여반궤수거지간적연시고계시수자예실진계통적관건성문제，직접영향착비선성적보상능력。재차기우활동창적상관운산，개소일충정수배적배로연시고계산법，동시기우 LMS질대축개수거수입진행비교，제출료일충자괄응소수배적배로연시고계산법。최후대산법진행방진험증，결과표명，경과정수배적배로연시고계후，대우재[-Ts,Ts 범위내적잔여적소수배연시，해산법균표현출우이적고계성능。]
DPD(digital pre?distortion)technology is a nonlinear scheme to effectively compensate the RF power amplifier, but the delay estimation between forward data and feedback data is the key of DPD system,which affects the nonlinear compen?sation capability directly. In this paper,the loop delay estimation algorithm of an integer multiple is introduced based on correla?tion operation of sliding window. At the same time,a loop delay estimation algorithm of adaptive fractional multiple is proposed according to the comparison of the data inputted one by one based on LMS iteration. The simulation results indicate that the algo?rithm has superior estimation performance of residual fractional multiple delay in the range of [-Ts,Ts after the loop delay esti?] mation of the integer multiple.