这种通信方式采用三线连接，全双工同步数据传输，具有连线少、速度快、可靠性高等特点。
This kind of communication mode employs three-wire connection and full duplex synchronous data transmission. It has the features of less link, fast speed, high reliability and etc.
本文针对ISDN数字用户环路二线全双工的回波抵消传输方式，首先探讨了LMS、VLMS1自适应算法，并在此基础上提出改进的VLMS2算法。
This paper discusses firstly adaptive algorithms of LMS and VLMS1, being used widely in treating the problem of echo cancellation for full-duplex transmission in ISDN digital subscriber's loop.
本文针对ISDN数字用户环路二线全双工的回波抵消传输方式，首先探讨了LMS、VLMS1自适应算法，并在此基础上提出改进的VLMS2算法。
This paper discusses firstly adaptive algorithms of LMS and VLMS1, being used widely in treating the problem of echo cancellation for full-duplex transmission in ISDN digital subscriber's loop.
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