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本文介绍1981年8月～11月在我国华北地区某地215.5公里的散射试验电路上,用2273.28MHz频率所进行的信道测试结果。在此仅给出这次测试中所获得的慢衰落概率分布和平均快衰落分布实测结果。结果表明:测试期间的中值信噪比-32.5dB,标准偏差σ=7.3dB,测试值和理论值相接近;从平均快衰落分布测试结果看出,衰落深度为6.7dB,说明测试期间信号属于广义瑞利衰落;衰落幅度为12dB,说明信号服从于广义瑞利分布。
This article describes the channel test results carried out at a frequency of 2273.28 MHz on a 215.5 km scatter test circuit in North China from August 1981 to November 1981. Here, only the measured results of the slow fading probability distribution and the average fast fading distribution obtained in this test are given. The results show that the median signal-to-noise ratio (-32.5dB) and the standard deviation (σ = 7.3dB) are close to the theoretical values during the test period. From the average fast-fading distribution test results, the fading depth is 6.7dB, Belongs to the generalized Rayleigh fading; the amplitude of the fading is 12dB, indicating that the signal is subject to the generalized Rayleigh distribution.