摘要
本文根据现有市话用户线路网的特性,研究并建立了适用于电话用户环路的回波抵消器的数学模型和电路结构,从而解决了用户二线环路远距离信号传输中的关键技术问题,并在此基础上研制出了经济实用的新型电话用户环路延伸器。
Based on the property of existing local subscriber line network, this paper does research on the mathematics model and the circuit model of the echo canceller that is suitable for telephon subscriber loop, thus far which has resolved a key technique problem about long distance transmission of signal in two line subscriber loop. on the basis of it, one type of economical and practicable new generational telephone subscriber loop stretcher has been prepared. (6 illus. , 4 refs.)
出处
《南京邮电学院学报》
北大核心
1993年第2期22-28,共7页
Journal of Nanjing University of Posts and Telecommunications(Natural Science)
基金
邮电部中青年科学基金
