Noise localization within cable based communication systems

摘要

A communication device (e.g., a cable modem (CM)) includes a digital to analog converter (DAC) and a power amplifier (PA) that generate a signal to be transmitting via a communication interface to another communication device (e.g., cable modem termination system (CMTS)). The CM includes diagnostic analyzer that samples the signal based on a fullband sample capture corresponding to a full bandwidth and/or a subset (e.g., narrowband) sample capture to generate a fullband and/or subset signal capture (e.g., of an upstream (US) communication channel between the CM and the CMTS). The diagnostic analyzer can be configured to generate sample captures of the signal based on any desired parameter(s), condition(s), and/or trigger(s). The CM then transmits the signal to the CMTS and the fullband and/or subset signal capture to the CMTS and/or a proactive network maintenance (PNM) communication device to determine at least one characteristic associated with performance of the US communication channel.

主权项

1. A communication device comprising:
a diagnostic analyzer configured to:
generate a sample capture of an upstream (US) communication channel between the communication device and another communication device;process the sample capture of the US communication channel to generate at least one of a sample of a frequency spectrum of the US communication channel or an integrated power per symbol histogram of the US communication channel;receive a first signal from a communication interface when the communication interface is transmitting a second signal to the another communication device; andprocess the first signal based on at least one of attenuating the first signal or canceling at least a portion of the second signal from the first signal to generate the sample capture of the US communication channel; and the communication interface configured to transmit at least one of the sample capture of the US communication channel, the sample of the frequency spectrum of the US communication channel, or the integrated power per symbol histogram of the US communication channel to and for use to be processed by at least one of the another communication device or a proactive network maintenance (PNM) communication device to determine at least one characteristic associated with performance of the US communication channel.