| 摘要 |
A system for the removing of interference (ingress) in cable modems without reducing the data rate or changing the frequency of the signal. The invention comprises both, a variable band stop filter bank, and a non-linear equalization system. The band stop filter bank removes ingress while the equalization system, comprising of an inner and an outer equalizer, removes the distortion created by the band stop filtering. A spectrum monitor detects both the presence of ingress and its frequency, then feeds the data to a digital signal processor which calculates the distortion removal settings for the equalizers. No additional hardware of software is required in the users homes, but rather the invention is designed to be used solely at the head end and in addition to the basic Cable Modem Termination System.
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