Noise localization within cable based communication systems

Patent metadata

Field	Value
Publication number	US-9596041-B2
Application number	US-201514800177-A
Country	US
Kind code	B2
Filing date	Jul 15, 2015
Priority date	Jul 28, 2014
Publication date	Mar 14, 2017
Grant date	Mar 14, 2017

Abstract

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.

First claim

What is claimed is:

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; and
process 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.

2. The communication device of claim 1 further comprising:
a processor configured to generate a first signal;
a digital to analog converter (DAC) configured to process the first signal to generate a second signal;
a power amplifier (PA) that is coupled or connected to the DAC and configured to process the second signal to generate a third signal;
the diagnostic analyzer configured to generate, based on an output node of the PA, the sample capture of the US communication channel; and
the communication interface configured to transmit the third signal to the another communication device.

3. The communication device of claim 1 further comprising:
the diagnostic analyzer configured to:
generate the sample capture of the US communication channel when the communication interface is transmitting a signal to the another communication device;
generate another sample capture of the US communication channel when the communication interface is not transmitting any signal to the another communication device; and
process the another sample capture of the US communication channel to generate a first other sample of the frequency spectrum of the US communication channel or a second other sample of another frequency spectrum of the US communication channel; and

the communication interface configured to transmit at least one of the another sample capture of the US communication channel, the first other sample of the frequency spectrum of the US communication channel, or the second other sample of the another frequency spectrum of the US communication channel to and for use to be processed by the at least one of the another communication device or the PNM communication device to determine the at least one characteristic associated with performance of the US communication channel.

4. The communication device of claim 1 further comprising:
a cable modem, wherein the another communication device includes a cable headend transmitter or a cable modem termination system (CMTS).

5. The communication device of claim 1 further comprising:
the diagnostic analyzer configured to:
generate a first sample capture of a fullband frequency spectrum of the US communication channel; and
generate a second sample capture of a subset of the fullband frequency spectrum of the US communication channel; and

the communication interface configured to transmit at least one of the first sample capture or the second sample capture to and for use to be processed by the at least one of the another communication device or the PNM communication device to determine another at least one characteristic associated with performance of the US communication channel.

6. The communication device of claim 1 , wherein the diagnostic analyzer is further configured to:
generate the sample capture of the US communication channel based on at least one trigger condition that includes at least one of a first timestamp received from the another communication device, a second timestamp received from the PNM communication device, an energy threshold, a power threshold, a first control signal received from the another communication device, a second control signal received from the PNM communication device, or a detection of at least one of a burst noise event or a clipping event associated with the US communication channel.

7. The communication device of claim 1 , wherein the communication interface is further configured to:
support communications within at least one of a satellite communication system, a wireless communication system, a wired communication system, a fiber-optic communication system, or a mobile communication system.

8. A communication device comprising:
a communication interface; and
a processor, at least one of the processor or the communication interface configured to:
support communication with another communication device;
receive at least one of a sample capture of an upstream (US) communication channel between the communication device and another communication device, a sample of a frequency spectrum of the US communication channel that is based on the sample capture of the US communication channel, or an integrated power per symbol histogram of the US communication channel, wherein the another communication device includes a diagnostic analyzer configured to generate 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 received from the another communication device, wherein the another communication device is configured to receive a first signal when the another communication device is transmitting a second signal to the communication device and to process 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

process the at least one of the sample capture of the US communication channel, the sample of the frequency spectrum of the US communication channel that is based on the sample capture of the US communication channel, or the integrated power per symbol histogram of the US communication channel to determine at least one characteristic associated with performance of the US communication channel between the another communication device and the communication device.

9. The communication device of claim 8 , wherein the at least one of the processor or the communication interface is further configured to:
receive a signal from the another communication device;
generate another sample capture based on the signal that is received from another communication device;
receive the 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, wherein the another communication device includes the diagnostic analyzer configured to generate the sample capture when the another communication device is transmitting the signal to the communication device; and
process the another signal capture and the 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 histogr

Assignees

• Broadcom Corp

Inventors

• Currivan Bruce Joseph
• Prodan Richard Stephen
• Montreuil Leo
• Kolze Thomas Joseph
• Gomez Ramon Alejandro
• Min Jonathan Sooki
• Lu Fang
• Mcmullin Donald George
• Miller Kevin Lee
• Cangiane Peter
• Laubach Mark Edward

Classifications

• H04B17/29

  Performance testing · CPC title

• H04L1/20 Primary

  using signal quality detector · CPC title

• H04L1/24

  Testing correct operation · CPC title

• H04L5/0007

  the frequencies being orthogonal, e.g. OFDM(A) or DMT · CPC title

• H04B17/26

  using historical data, averaging values or statistics · CPC title