摘要
根据局域网用 5、6类数字通信对称电缆用于基带传输的特点 ,提出频带内平均信噪比的观点 ,将线对间的近端串音和远端串音看成主要干扰噪声 ,依据电缆标准中对串音和衰减要求 ,推导出在电缆的传输速率点上接收端的串音衰减比 ,即信噪比 (S/N ) ,求出误码率。
Based on the fact that category 5&6 digital communication cables are used for LAN transmission on baseband, a concept of average SNR within a band is proposed. By considering near end crosstalk and far end crosstalk between the pairs as the main interference noise, and according to the reguirements of crosstalk and atte nuation in the cable standard, the ACR(i.e. S/N) and bit error rate are calculated at various transmission rates. Finally the key points for the cable manufacture are presented.
出处
《光纤与电缆及其应用技术》
2002年第2期18-22,共5页
Optical Fiber & Electric Cable and Their Applications
关键词
数字通信
传输性能
5类电缆
6类电缆
串音
误码率
category 5 cable
category 6 cable
near end crosstalk
far end crosstalk
bit error rate
