基于MUSIC算法的天线系数测量信号分析方法

摘要

A signal analysis method based on multiple signal classification(MUSIC)is proposed for distilling the site attenuation(SA)of direct wave from SA measurement with antenna at fixed height. Based on free-space site attenna-tion mathematic model,the far field antenna factor was calculated using the direct wave SA. A half-wave dipole an-tenna with tune frequency 500,MHz was used in experimental measurement in the frequency range of 300,MHz~1,GHz. The direct wave SA agreed well with simulation with the method of moments(MoMs). The far field antenna factor calculated was well consistent with the value measured using standard site method(SSM)of CISPR 16-1-6. Therefore the antenna factor measurement signal can be extracted by the signal analysis method based on MUSIC effi-ciently.%基于自由空间场地衰减数学模型，提出多重信号分类(MUSIC)算法的信号分析方法，从在固定天线高度测量的场地衰减信号中，提取直射波场地衰减量，推算远场天线系数。取谐振频率为500,MHz的半波偶极子天线为研究对象，在300,MHz～1,GHz 频率范围内进行实验验证。结果表明，此分析方法提取的直射波场地衰减与采用矩量法的仿真值吻合较好，利用此场地衰减推算的远场天线系数与 CISPR16-1-6的标准场地法测量的天线系数一致性较好，此算法可以用于天线系数测量的信号提取。