Crosstalk Identification and Modified Crosstalk Model
نویسندگان
چکیده
The performance of xDSL-systems is determined by the existing crosstalk interference. xDSLsystems are optimised to the existing crosstalk interferences in a cable bundle. The crosstalk interference leads to unwanted restrictions in the number of xDSL-systems, which are able to operate parallel in a cable bundle. Realistic crosstalk models are necessary for xDSL-system tests and for the design of future telephone networks. With the modified crosstalk model introduced in this paper, the crosstalk coupling functions between the twisted pairs of a cable bundle can be estimated with low effort in the frequency domain. The crosstalk coupling functions are calculated from the measured spectra of the transmitted signals along the interfering wire pairs and from the spectra of the crosstalk interference on the interfered twisted pair. The modified crosstalk model can be implemented in a flexible impairment generator, which reproduces realistic crosstalk interferences for xDSL-system tests in the laboratory. Furthermore, the modified crosstalk model can be deployed in a tool for design and maintenance of telephone networks. Key-Words: xDSL, crosstalk model, crosstalk identification, multiple linear regression
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تاریخ انتشار 2002