公开(公告)号：US20160254788A1

公开(公告)日：2016-09-01

申请号：US15026324

申请日：2014-10-01

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： Shavantha KULARATNA ,  Christian REICHL ,  Bjoern JELONNEK ,  Alan PEREIRA ,  Glenn SCHEDEEN ,  Sandeep MEHTA

IPC: H03F1/32 ,  H03F3/213 ,  H04B1/04 ,  H03F3/195

CPC classification number: H03F1/3247 ,  H03F1/02 ,  H03F3/19 ,  H03F3/195 ,  H03F3/21 ,  H03F3/213 ,  H03F3/24 ,  H03F2200/336 ,  H03F2200/451 ,  H03F2201/3227 ,  H04B1/0475 ,  H04B1/40 ,  H04B2001/0416 ,  H04B2001/045

Abstract: Enhancing the intermodulation performance of an RF power amplifier by determining a coarse time delay represented by an integer TI; determining a reference point for a transmitted signal waveform of the RF power amplifier; shifting the waveform by a set of offsets including a plurality of non-integer fractional steps; correlating the transmitted signal waveform with a feedback signal waveform to obtain a respective correlation value for each of corresponding fractional steps; obtaining an accurate fractional delay value by selecting a fractional step having a highest respective correlation value; applying the obtained correct fractional delay value to the transmitted signal waveform to provide a compensated transmitted signal waveform and combining the compensated transmitted signal waveform with the feedback signal waveform to reduce at least one intermodulation product of the RF power amplifier.

Abstract translation: 通过确定由整数TI表示的粗略时间延迟来增强RF功率放大器的互调性能; 确定RF功率放大器的发射信号波形的参考点; 将波形移位一组包括多个非整数分数步长的偏移量; 将发送的信号波形与反馈信号波形相关，以获得每个相应分数步骤的相应相关值; 通过选择具有最高各自的相关值的分数步骤来获得精确的分数延迟值; 将所获得的正确分数延迟值应用于所发送的信号波形以提供经补偿的发射信号波形，并将补偿的发射信号波形与反馈信号波形组合以减少RF功率放大器的至少一个互调乘积。