【作者】 杜邓宝； 阳辉； 宋健；

【Author】 Du Dengbao Yang Hui and Song Jian (Tsinghua National Laboratory for Information Science and Technology State Key Laboratory of Microwave and Digital Communication Department of Electronic Engineering,Tsinghua University,Beijing 100084,China)

【机构】 清华信息科学与技术国家实验室微波与数字通信技术国家重点实验室清华大学电子工程系；

【摘要】 在分析了无源互调产生的根源及传统测量方法的基础上,本文给出了一种基于FFT运算的无源互调失真数字化测量方法,并详细分析了数字化运算过程中由栅栏效应所引入的测量偏差,提出了测量偏差消除方法,基于本文所提算法实现的硬件测量结果证明了算法的有效性,即使在所测量的无源互调信号功率为-70dBm时,测量误差也不超过0.2dB。更多还原

【Abstract】 Based on the analysis of the origin and conventional measurement of the passive inter-modulation,this paper proposes a digital measurement approach for the passive inter-modulation distortion based on FFT.Furthermore,the offsets caused by fence effect during the digital operation are analyzed in detail and method to compensate for the offsets is proposed.The algorithm is realized in hardware and the measurement results show that the measurement error is no more than 0.2dB even if the passive inter-modulation signal power to be measured is as low as-70dBm.更多还原