Journal of the Korean Institute of Telematics and Electronics (대한전자공학회논문지)
- Volume 27 Issue 5
- /
- Pages.672-683
- /
- 1990
- /
- 1016-135X(pISSN)
A Simulation on the Performance of Line Codes for ISDN U-Interface
종합정보통신망 U-접속 선로부호의 성능에 관한 시뮬레이션
Abstract
The line code for ISDN subscriber loops is a critical choice in designing U-interface transceiver, since it affects system performance in a crucial way. This paper provides the performance analysis of U-interface transceiver systems employing four different line codes AMI, MMS43, VMDB5, and 2B1Q. The codes are compared using computer simulation studies, and three performance parameters of the four codes such as power spectrum, eye width, and error probability are used for the comparison. The simulation model consists of the encoder, transmit filter (root-raised cosine filter), channel, receive filter, zero-forcing equalizer, sampler, and decoder. The near-end crosstalk and addive white gaussian noise are considered as teh principal impediments.
Keywords