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无线电设备接收系统检测有用信号的能力,在短波频段常常受到空间噪声能量的限制。空间噪声系数的大小不仅随着频率的变化而变化,而且也随着地区的不同而变化。在我国领土和领海范围内的空间噪声分布尚无完整的测量数据,以往在工作中大都是借用国外资料上的数据,这样很不准确。为了工作的需要,我们对郑州西北方向上的空间噪声系数进行了测量、第一次获得了该地区空间噪声系数的定量数据。
The ability of a radio to receive a useful signal from a system is often limited by the spatial noise energy in the shortwave frequency band. The size of the spatial noise figure varies not only with frequency, but also with the area. The distribution of spatial noise in the territorial and territorial sea areas in our country does not have complete measurement data. In the past, most of the work borrowed the data from foreign sources, which was inaccurate. In order to meet the needs of our work, we measured the spatial noise figure in the northwest of Zhengzhou and obtained the quantitative data of spatial noise figure for the first time.