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.
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。
It explores the effect of different channels of noise sources,including FEXT,NEXT,HDSL,T1,ISDN,AWGN,to get the relationship between ADSL transmit capacity and length of line.
仿真中参考了6种典型的CSA环路作为分析的依据,讨论了近端串音(NEXT)、远端串音(FEXT)以及高斯白噪声对传输线路的影响,并将ADSL线路和HDSL、T1以及ISDN线路近端串音作了比较,最后得到ADSL信道的传送容量与线路长度的关系曲线。
The document proposes a measurement and data-process system for UTP, with the results followed, including transfer function, NEXT coupling constant and FEXT coupling constant, which are some inhere coefficients of UTP.
本文系统提出了DSL系统中双绞线电缆的测试方法和数据处理方法,包括双绞线传递函数和近端、远端串音传递函数,进行了实际的测量并给出了相应的测试结果。
