Fading characteristics of a geographically fixed, normally line of sight, 450 MHz radio channel in the Southeastern United States

IEEE International Conference on Communications, Including Supercomm Technical Sessions Pub Date : 1990-04-16 DOI:10.1109/ICC.1990.117256

G.N. Patterson

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引用次数: 2

Abstract

Described are the fading characteristics of a normally line-of-sight, fixed-station 450 MHz radio path, which can be typical of paths encountered in a basic exchange telecommunications radio (BETR) system in the southeastern United States. The fading parameters of the radio channel examined are slope and attenuation, the characteristics of which are expressed with density functions and cumulative distributions of data gathered over a 5 and a 1/2 month period. The knowledge derived from these measurements should permit more accurate radio system engineering and aid in determining BETR system requirements for this region of the country. One application of this information will be to determine the optimum fade margins for the design of BETR installations. This will allow the greatest possible range of service without degrading system availability, a consequence of excessive fade margins. The slope information is useful in predicting the bit error rate performance of 450 MHz digital radio systems in determination of the need for adaptive equalization.<>

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美国东南部一个地理上固定的、通常视线的450兆赫无线电频道的衰落特性

描述了通常视距固定电台450mhz无线电路径的衰落特性，这可能是美国东南部基本交换电信无线电(BETR)系统中遇到的典型路径。所研究的无线电信道衰落参数为斜率和衰减，其特征用密度函数和5个月和1/2个月期间收集的数据的累积分布表示。从这些测量中获得的知识应该允许更精确的无线电系统工程，并有助于确定该国该地区的BETR系统需求。这些信息的一个应用将是确定BETR装置设计的最佳衰减余量。这将允许最大可能的服务范围，而不会降低系统的可用性，这是过度衰减余量的后果。斜率信息可用于预测450 MHz数字无线电系统的误码率性能，以确定是否需要自适应均衡

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, Including Supercomm Technical Sessions

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