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卫星通信中准确而方便地计算交调干扰对颖分多址(FDMA)有巨大的实际意义。特别对一个转发器中有很多载波的单路单载波系统(SCPC)来说,这种计算显得更为重要。本文利用贝塞尔级数法对多电平SCPC系统的交调作了分析,并在DPS-8机(Fortran语言)和王安MVP-2200机(BASIC语言)上进行了实例计算,为某气象卫星转发器中的SCPC载波的功率和频率设计提供了有用的结论。限于篇幅,程序清单从略,仅列出主要框图和计算结果。
Accurate and convenient calculation of intermodulation interference in satellite communications is of great practical significance for FDMA. This calculation is even more important, especially for single-carrier single-carrier systems (SCPCs) with many carriers in one transponder. In this paper, we analyze the intermodulation of multi-level SCPC system by using Bessel series method and do the case calculation on DPS-8 machine (Fortran language) and Wangan MVP-2200 machine (BASIC language) The power and frequency design of the SCPC carrier in the meteorological satellite transponder provides useful conclusions. Due to space limitations, the program list omitted, only the main block diagram and calculation results are listed.