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本文介绍一种描述高速数字通信二线对绞用户环设备特性的方法。利用这种分析/数值方法,就可在一组给定的代表特定用户环及其噪声环境(包括串号干扰、串话和脉冲噪声)的输入参数下,预测出误码概率特性与信噪比的关系,所得结果对于研究环路设备群在实现测定的固定业务等级时的适用性很有用。本文将介绍这种方法的模型构成假设条件、分析/数值技术。主要针对采用双极性线路编码的时间压缩复接(TCM)法,但此法很有通用性。为实现这种方法开发了大量的计算机程序,文章根据计算机程序的抽样图示输出给出了若干数值结果。最后根据作为最近广泛调查的一部分收集到的数据,介绍这种方法用于对客观评价 GTE用户环设备的适用性情况。
This article describes a method for characterizing high-speed digital communications twisted pair user ring device characteristics. Using this analytical / numerical approach, the probability of error probability and signal-to-noise can be predicted for a given set of input parameters representing a particular user ring and its noise environment (including serial number interference, crosstalk, and impulsive noise) The results obtained are useful for studying the suitability of a group of loop devices for achieving fixed service levels for measurement. This article describes the hypothetical conditions that make up this model of the model, analytical / numerical techniques. Mainly for the time compression multiplexing (TCM) method using bipolar circuit coding, but this method is very versatile. A number of computer programs have been developed to implement this method. Several numerical results are given based on the output of a sample program of a computer program. Finally, based on the data collected as part of a recent extensive survey, this method is presented for assessing the applicability of GTE subscriber ring devices to objective assessments.