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本文对贝洛单积分对流层散射信道模型提出了改进。其改进的目的就是要提高该模型精确地予测150哩以下的对流层散射路径的延迟功率谱的能力。改进模型的方法就是把散射角的指数作为路径长度的变量来看,而不是把它作为常数来对待。从六条短路径对流层散射线路上获得的数据和贝洛模型用各种散射角指数所予测到的数据进行了比较。结果指出:散射角指数和路径长度之间的一阶函数关系。在贝洛模型中利用这种关系,明显地改善了六条所讨论的路径的予测性能。
In this paper, we present an improvement on Bello single-tropospheric scattering channel model. The purpose of this improvement is to improve the model’s ability to accurately predict the delayed power spectrum of tropospheric scatter paths below 150 miles. The way to improve the model is to look at the scatter angle exponent as a variable of path length rather than treat it as a constant. Data obtained from six short-path tropospheric scatter lines are compared with those from the Bello models using various scatter angle indices. The results indicate the first-order functional relationship between the scattering angle index and the path length. Using this relationship in the Bello model significantly improves the predictive performance of the six paths discussed.