Systems and methods presented herein provide for improved duplex communications in an RF cable network comprising a plurality of CMs. In one embodiment, a system includes a CMTS operable to transmit downstream communications to the CMs and to process upstream communications from the CMs. The system also includes a duplex RF communication path between the CMTS and the CMs. The CMTS is further operable to transmit a control signal that directs a first of the CMs to transmit, to direct the remaining CMs to receive the transmission from the first CM, to direct the CMs to report received power levels of the transmission from the first CM, and to calculate RF isolations of the remaining CMs with respect to the first CM based on the reported power levels.

Systems and methods presented herein provide for improved duplex communications in an RF cable network comprising a plurality of CMs. In one embodiment, a system includes a CMTS operable to transmit downstream communications to the CMs and to process upstream communications from the CMs. The system also includes a duplex RF communication path between the CMTS and the CMs. The CMTS is further operable to transmit a control signal that directs a first of the CMs to transmit, to direct the remaining CMs to receive the transmission from the first CM, to direct the CMs to report received power levels of the transmission from the first CM, and to calculate RF isolations of the remaining CMs with respect to the first CM based on the reported power levels.

In one embodiment, a method receives a downstream signal and an upstream signal in a same frequency band. The downstream signal and the upstream signal are separated into a first path and a second path. The downstream signal using the first path and the upstream signal using the second path are amplified in an analog domain. The method isolates the downstream signal and the upstream signal from one another and sends the downstream signal downstream to a subscriber device and sends the upstream signal towards a full duplex node.

For Digital Subscriber Line (DSL), the whole system needs to deal with crosstalk of the neighboring pairs in the same bundle. A mechanism named Dynamic Spectrum Management (DSM) is proposed to optimize the overall performance of many subscriber lines, by means of lowering some unnecessary power spectrum density (PSD) on some lines and thus reducing their crosstalk to others. The decisions of the reduction (or power back-off, PBO) usually base on the loop distances between Central Office (CO) and the subscriber's premises. The shorter the distance, the lower the power. However, this does not consider the fact of each individual line's quality, i.e., its background noise or external interferences. The transceivers are able to collect such information. A negotiation process includes this information to adjust the power cutback, so that the cutback won't degrade the potential optimal performance of such lines.

For Digital Subscriber Line (DSL), the whole system needs to deal with crosstalk of the neighboring pairs in the same bundle. A mechanism named Dynamic Spectrum Management (DSM) is proposed to optimize the overall performance of many subscriber lines, by means of lowering some unnecessary power spectrum density (PSD) on some lines and thus reducing their crosstalk to others. The decisions of the reduction (or power back-off, PBO) usually base on the loop distances between Central Office (CO) and the subscriber's premises. The shorter the distance, the lower the power. However, this does not consider the fact of each individual line's quality, i.e., its background noise or external interferences. The transceivers are able to collect such information. A negotiation process includes this information to adjust the power cutback, so that the cutback won't degrade the potential optimal performance of such lines.

Systems and methods for crosstalk suppression. According to an embodiment of the present disclosure, there is provided a system, including: a first communications channel; and a first crosstalk reduction circuit, the first communications channel being a wired communications channel, and the first crosstalk reduction circuit being configured to: receive a signal from a second communications channel; and modify a signal in the first communications channel to reduce an effect of crosstalk from the second communications channel.

Systems and methods for crosstalk suppression. According to an embodiment of the present disclosure, there is provided a system, including: a first communications channel; and a first crosstalk reduction circuit, the first communications channel being a wired communications channel, and the first crosstalk reduction circuit being configured to: receive a signal from a second communications channel; and modify a signal in the first communications channel to reduce an effect of crosstalk from the second communications channel.

The present disclosure is directed to improvements in interference mitigation for Adjacent Channel Leakage in wireline communication, and more specifically, but not exclusively, to improved kernel designs that can facilitate interference mitigation for Adjacent Channel Leakage in cable modem systems. Examples of the present disclosure provide an apparatus for a transceiver device that comprises interference cancellation circuitry configured to cancel interference caused by upstream signals in one or more upstream sub-bands on one or more downstream sub-bands based on a combination of a plurality of kernels. The interference is at least partially caused by non-linearities within a transmission circuitry of the transceiver device, the plurality of kernels representing the non-linearities within the transmission circuitry of the transceiver device. Each of the kernels comprises one or more associated terms, with each of the associated terms being in-band for at least one of the one or more downstream sub-bands.

The present disclosure is directed to improvements in interference mitigation for Adjacent Channel Leakage in wireline communication, and more specifically, but not exclusively, to improved kernel designs that can facilitate interference mitigation for Adjacent Channel Leakage in cable modem systems. Examples of the present disclosure provide an apparatus for a transceiver device that comprises interference cancellation circuitry configured to cancel interference caused by upstream signals in one or more upstream sub-bands on one or more downstream sub-bands based on a combination of a plurality of kernels. The interference is at least partially caused by non-linearities within a transmission circuitry of the transceiver device, the plurality of kernels representing the non-linearities within the transmission circuitry of the transceiver device. Each of the kernels comprises one or more associated terms, with each of the associated terms being in-band for at least one of the one or more downstream sub-bands.

Disclosed is a signaling circuit. A switch circuit generates an internal reference supply voltage and an internal lower supply voltage, from first and second power supply voltages. A transmit circuit drives a high bit from the first power supply voltage, and drives a low bit from the internal lower supply voltage. The second terminal of the data output is connected to the internal reference supply voltage.