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本文介绍同轴电缆通信系统的最优设计。各种参数诸如:预畸特性、反馈特性、发送电平等都已加以考虑,并用电子数字计算机求出各项参数的最优组合。文中首先介绍杂音计算的主要公式及其数值计算法,其次采用单纯形法初步求出杂音的最小点,最后再沿谷线进行搜索,以得出各参数的最优值。ODCCS 总程序主要包括三个子程序,即 NOISE 杂音计算子程序;SIMPLEX 单纯形法子程序;SAV 沿谷线搜索子程序。全部程序都是用 BASIC-Ⅱ语言编写的。
This article describes the optimal design of coaxial cable communication systems. A variety of parameters such as: pre-distortion characteristics, feedback characteristics, transmission levels have been taken into account, and using electronic digital computer to find the optimal combination of the various parameters. In this paper, the main formulas of noise calculation and its numerical method are introduced first, followed by the simplex method to find the minimum noise point, and then search along the valley to get the optimal value of each parameter. ODCCS main program consists of three subroutines, namely NOISE noise calculation subroutine; SIMPLEX simplex method subroutine; SAV along the valley search subroutine. All programs are written in BASIC-II language.