Apparatus for and method of characterization of et

专利名称：Apparatus for and method of
characterization of ethernet cable
impairments
发明人：Italy Lusky,Daniel Wajcer,Naftali Sommer
申请号：US11353579
申请日：20060213
公开号：US20060182014A1
公开日：
20060817
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专利附图：
摘要：A novel mechanism for performing Ethernet noise source characterization including monitoring and analyzing several Ethernet impairments, including Ethernet
1000Base-T impairments. Time domain and frequency domain analysis techniques are used to characterize cable performance, supportable transmission rate and to determine whether cable performance and specification requirements are being met. Various noise sources are characterized including: echo signal, NEXT signal, FEXT signal, insertion loss, alien NEXT/external noise source and residual noise. Using time domain analysis, the power of the interfering signal is measured and compared to a pre-defined allowed reference limit. Alternatively, the filter tap values used in the receive signal processing blocks, e.g., echo canceller, NEXT canceller, FEXT detector/canceller, etc., can be used. In addition, the energy of the actual filtered output generated within the receiver from these processing blocks may be used as well. The measured or calculated results are checked to determine whether they are within compliance specified by the standard. Using frequency domain analysis, a Fourier transform is applied to the filter tap values or the output of the processing blocks themselves. The result is checked for compliance with the standard.
申请人：Italy Lusky,Daniel Wajcer,Naftali Sommer
地址：Hod Hasharon IL,Beit-Yehoshua IL,Rishon Letzion IL
国籍：IL,IL,IL
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