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首页> 外文期刊>Electronic and Radio Engineers, Journal of the Institution of >Measurement of building penetration loss on radio signals at 441, 900 and 1400MHz
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Measurement of building penetration loss on radio signals at 441, 900 and 1400MHz

机译：测量建筑物在441、900和1400MHz时对无线电信号的穿透损耗

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摘要

Measurements have been undertaken as a part of the first phase of an investigation concerned with propagation into buildings. A series of trials has been conducted within the University of Liverpool precinct aiming to determine the building penetration loss of transmitted signals at 441, 900 and 1400 MHz. The tests were devised to study the first-order statistics of the signal inside buildings when the transmitter is outside. It has been found that the small-scale signal variation exhibits a Rayleigh distribution, while the large-scale signal variation is log- normally distributed with a standard deviation related to the area of the floor and the condition of transmission. The standard deviation was found to be 4 dB when no line-of-sight existed between the transmitter and the building where the receiver was located. If a line-of-sight path existed to part of or the whole of the building, the standard deviation increased to 6¿9 dB. The penetration loss decreased at a rate of approximately 2dB per floor as a function of height within the building. The average penetration loss decreased at higher frequencies, the change being approximately 1 5 dB from 441 MHz to 896 MHz and 4 dB to 1400 MHz.
机译：作为涉及建筑物传播的调查的第一阶段的一部分，已进行了测量。利物浦大学区已进行了一系列试验，旨在确定441、900和1400 MHz传输信号的建筑物穿透损耗。设计这些测试是为了研究发射机在室外时建筑物内部信号的一阶统计量。已经发现，小规模信号变化表现出瑞利分布，而大尺度信号变化呈对数正态分布，其标准偏差与地板面积和传输条件有关。当发射器与接收器所在的建筑物之间不存在视线时，发现标准偏差为4 dB。如果视线路径存在于建筑物的一部分或整个建筑物，则标准偏差将增加到6×9 dB。渗透损耗随建筑物内高度的变化而降低，约为每层2dB。平均渗透损耗在较高频率下降低，从441 MHz到896 MHz的变化约为1 5 dB，从4 dB到1400 MHz的变化约为1 dB。

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