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本文概述了利用集成电路实现综合业务数字网(ISDN)中的基本用户接续144kb/sU接口收发器的设计要求。对于给定的价格和性能指标,从算法和技术的观点看,它表现为一个复杂的设计问题。本文在用于全双工数据传输的回波抵消(E C)法方面叙述了可供选择的设计方法,这些设计方法仅涉及与电路设计问题不同的算法问题。并把重点放在了回波抵消、均衡、线路码选择和时钟恢复等方面。
This article provides an overview of the design requirements for a basic user interface in an integrated services digital network (ISDN) to follow a 144kb / s U interface transceiver using an integrated circuit. For a given price and performance metric, it appears as a complex design problem from an algorithmic and technical point of view. This article describes alternative design approaches for echo cancellation (E C) for full-duplex data transmission. These design approaches address only algorithmic issues that differ from circuit design issues. And focus on the echo cancellation, equalization, line code selection and clock recovery and so on.