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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涉及干扰的近远场传播的干扰聚集及其对无线电保护发射限值的影响

为了将干扰聚集效应引入发射限制设置模型，研究了随机分布的干扰源产生的聚集干扰功率，考虑了辐射干扰的近远场传播。假设点源在二维模型中均匀分布，并且到受害接收机的距离范围从近场区域到远场区域。分段近似应用于距离衰减曲线，其角距离指示近场和远场之间的边界。在不同的源密度下，对分贝尺度的聚合干扰功率的平均值、标准偏差和概率密度函数 (PDF) 进行了理论和数值分析。结果表明，由于来自近场和远场的干扰源的混合贡献，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，应仔细考虑距离衰减特性和真实环境中估计的源密度。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，应仔细考虑距离衰减特性和真实环境中估计的源密度。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，应仔细考虑距离衰减特性和真实环境中估计的源密度。