| 摘要 |
The CCIR,
CONSIDERING
(a) that systems in the fixed-satellite service and line-of-sight radio-relay systems share certain frequency bands above 1 GHz;
(b) that mutual interference would increase the noise in both types of system beyond that which would exist in the absence of frequency sharing;
(c) that it is desirable that the noise, due to interference in the telephone channels of existing radio-relay systems, emanating from transmitters of satellites and earth stations, should be a fraction of the total noise in those systems, such that it would not be necessary to change the design objectives for radio-relay systems, as set out in Recom-mendation 393;
(d) that it is necessary to specify the maximum allowable interference power in a telephone channel, to determine the maximum power flux from communication satellites which can be allowed at the surface of the Earth and to determine whether specific locations for satellite-earth stations and terrestrial radio-relay stations would be satisfactory;
(e) that a distribution of one-minute mean power, as exemplified in Fig. 1, would allot to interference a reasonable fraction of the total noise power permitted in the hypothetical reference circuit |
PDF(76M) 
您当前的位置：
ITU-R ITU无线标准