To introduce the interference aggregation effect into the emission-limit-setting model, aggregate interference power arising from randomly distributed disturbance sources is studied considering the near- to far-field propagation of radiated disturbance. It is assumed that point sources are uniformly distributed in a two-dimensional model and that the distance to the victim receiver ranges from the near-field region to the far-field region. A piecewise approximation is applied to the distance attenuation curve with a corner distance that indicates the border between the near and far fields. The mean value, standard deviation, and probability density function (PDF) of the decibel-scaled aggregate interference power are theoretically and numerically analyzed at various source densities. The results show that the shape of the PDF markedly changes as the source density increases because of the mixed contribution of disturbing sources both from the near and far fields. Accordingly, the variations in the mean value and standard deviation of the aggregate interference power are strongly dependent on the distance attenuation at which major interfering sources are found. When introducing the interference aggregation effect into the emission requirements, both the distance attenuation characteristics and the estimated source density in a real environment should be carefully considered.

中文翻译：

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涉及近远场扰动传播的干扰聚集及其对无线电防护发射限值的影响


为了将干扰聚合效应引入发射限制设置模型，考虑辐射骚扰的近场到远场传播，研究随机分布的骚扰源产生的聚合干扰功率。假设点源均匀分布在二维模型中，并且到受害接收器的距离范围从近场区域到远场区域。对距离衰减曲线应用分段近似，其角距离指示近场和远场之间的边界。在不同源密度下，对分贝级聚合干扰功率的平均值、标准差和概率密度函数 (PDF) 进行了理论和数值分析。结果表明，由于近场和远场干扰源的混合作用，PDF 的形状随着源密度的增加而显着变化。因此，总干扰功率的平均值和标准偏差的变化很大程度上取决于发现主要干扰源的距离衰减。在将干扰聚集效应引入发射要求时，应仔细考虑真实环境中的距离衰减特性和估计的源密度。