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引言本文叙述自动功率控制(A.P.C)在松鸡 SCRA 子系统中的应用。本文虽只讨论了 SCRA子系统的自动功率控制要求,但文中所涉及的问题及解决办法,也适用于其它的移动通讯系统。SCRA 使用了与中心台进行连续双工数字通讯的十二台 VHF 移动终端机。这些终端机能在不同的距离以不同的信道频率同时向中心台进行发射。结果彼此之间就可能形成严重的邻道干扰。用窄带调制和增加频率间隔的方法,可把这些干扰减小,但下面对性能要求所作
Introduction This paper describes the application of automatic power control (A.P.C) in the SCRA subsystem of grouse. Although this paper only discusses the automatic power control requirements of the SCRA subsystem, the problems and solutions involved in this paper are also applicable to other mobile communication systems. SCRA used twelve VHF mobile terminals for continuous duplex digital communications with the central station. These terminals can simultaneously transmit to the center station at different distances with different channel frequencies. As a result, serious adjacent-channel interference may be formed between them. Narrow band modulation and increase the frequency interval method, these interference can be reduced, but the following performance requirements made