A method is for processing a channel analog signal coming from a transmission channel. The method may include converting the channel analog signal into a channel digital signal, and detecting a state of the transmission channel based on the channel digital signal to detect whether the transmission channel is, over an interval of time, one or more of linear and time invariant and linear and cyclostationary.

A method is for processing a channel analog signal coming from a transmission channel. The method may include converting the channel analog signal into a channel digital signal, and detecting a state of the transmission channel based on the channel digital signal to detect whether the transmission channel is, over an interval of time, one or more of linear and time invariant and linear and cyclostationary.

A method is for processing a channel analog signal coming from a transmission channel. The method may include converting the channel analog signal into a channel digital signal, and detecting a state of the transmission channel based on the channel digital signal to detect whether the transmission channel is, over an interval of time, one or more of linear and time invariant and linear and cyclostationary.

The present invention relates to methods and apparatuses for sensing noise sources in a wireline communications environment such as a customer premises environment in a DSL system. In embodiments, the invention includes an additional sensor that is connected to power mains in a DSL customer premises environment either to characterize, at their source, noises coupling into the DSL lines, and/or to mitigate their impact into the DSL lines. One objective is associated with diagnostics that help to better characterize the noise signals themselves and derive correlation of signals sensed from the power mains and their possible projection onto the DSL line. Another objective makes use of these power line sensor signals to mitigate or to eliminate power line noises that make their way onto the DSL line. Example embodiments further include and exploit signals from additional secondary sensors such as secondary common mode, differential mode and phantom mode sensors.

The present invention relates to methods and apparatuses for sensing noise sources in a wireline communications environment such as a customer premises environment in a DSL system. In embodiments, the invention includes an additional sensor that is connected to power mains in a DSL customer premises environment either to characterize, at their source, noises coupling into the DSL lines, and/or to mitigate their impact into the DSL lines. One objective is associated with diagnostics that help to better characterize the noise signals themselves and derive correlation of signals sensed from the power mains and their possible projection onto the DSL line. Another objective makes use of these power line sensor signals to mitigate or to eliminate power line noises that make their way onto the DSL line. Example embodiments further include and exploit signals from additional secondary sensors such as secondary common mode, differential mode and phantom mode sensors.

A method and a system for preventing phantom data communication links from occurring that substantially eliminates or reduces at least some of the disadvantages and problems associated with previous data communication network management techniques. In accordance with a particular embodiment of the present disclosure a method for managing data communications is provided that comprises the step of providing a central office data communication switch that comprises a plurality of data communication ports. A port controller causes the ports to estimate various physical characteristics of the incoming signals from network termination points. This processing of incoming signals leads to the precise detection of phantom links and their immediate termination. Thus, this method prevents the formation of phantom links that may occur if physical conductors which are susceptible to crosstalk interference with connected conductors erroneously convey a response signal back to an unattached port within the head-in switching system.

A method is for processing a channel analog signal coming from a transmission channel. The method may include converting the channel analog signal into a channel digital signal, and detecting a state of the transmission channel based on the channel digital signal to detect whether the transmission channel is, over an interval of time, one or more of linear and time invariant and linear and cyclostationary.

A method is for processing a channel analog signal coming from a transmission channel. The method may include converting the channel analog signal into a channel digital signal, and detecting a state of the transmission channel based on the channel digital signal to detect whether the transmission channel is, over an interval of time, one or more of linear and time invariant and linear and cyclostationary.

The embodiments described herein are directed at techniques to perform antenna/cable disconnection using co-located communication devices. A first device may transmit a reference signal over a predetermined bandwidth. A parasitic signal corresponding to the reference signal may be received via coupling at a second device that is co-located with the first device. The second device may be coupled to a first end of a cable via a port, with the second end of the cable configured to connect to an antenna. A processing device may determine a ratio of amplitudes of the parasitic signal over a predefined bandwidth. The processing device may then determine, based on the amplitude of the parasitic signal over the predefined bandwidth, a disconnect status of one or more of the antenna and the cable.

The embodiments described herein are directed at techniques to perform antenna/cable disconnection using co-located communication devices. A first device may transmit a reference signal over a predetermined bandwidth. A parasitic signal corresponding to the reference signal may be received via coupling at a second device that is co-located with the first device. The second device may be coupled to a first end of a cable via a port, with the second end of the cable configured to connect to an antenna. A processing device may determine a ratio of amplitudes of the parasitic signal over a predefined bandwidth. The processing device may then determine, based on the amplitude of the parasitic signal over the predefined bandwidth, a disconnect status of one or more of the antenna and the cable.