Interference dynamics considerations in digital radio performance estimation

IEEE International Conference on Communications, - Spanning the Universe. Pub Date : 1988-06-12 DOI:10.1109/ICC.1988.13718

A.B. Adenigba, A. Tsolakis

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Abstract

Digital radio performance degradation due to interference is significant in the latest 64 QAM technology and must be considered during the path design of a digital radio facility. A route engineering tool, based on a model that considers radio interference to be time-varying has been developed for designing rugged digital radio paths in a radio interference environment. The long-term statistics of interference dynamics during multipath fading is modeled as a lognormal distribution with a standard deviation dependent on terrain roughness. Analysis of multipath fading data obtained from a distance experiment has shown a linear relationship between the standard deviation of the interference and the fade depth of the desired signal. When this interference dynamics model is used to calculate the expected outage in a 64 QAM digital radio system equipped with space diversity (at a junction station with average terrain roughness, a free space C/l of 60 dB, and a standard deviation of 4 dB), a 200% increase in outage is predicted over the outage predicted by the constant interference model.<>

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数字无线电性能估计中的干扰动力学考虑

在最新的64 QAM技术中，由于干扰导致的数字无线电性能下降是一个重要的问题，在数字无线电设施的路径设计中必须考虑到这一点。在考虑无线电干扰时变模型的基础上，开发了一种路由工程工具，用于在无线电干扰环境中设计坚固的数字无线电路径。在多径衰落过程中，干扰动力学的长期统计量被建模为对数正态分布，其标准差依赖于地形粗糙度。对远距离实验得到的多径衰落数据的分析表明，干扰的标准差与期望信号的衰落深度之间存在线性关系。当该干扰动力学模型用于计算配备空间分集的64 QAM数字无线电系统(在平均地形粗糙度，自由空间C/l为60 dB，标准差为4 dB的交叉站)的预期中断时，预计中断比恒定干扰模型预测的中断增加200%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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IEEE International Conference on Communications, - Spanning the Universe.

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