US 12,250,177 B2 · Flexible diplexer with dynamically configurable band-split in hybrid fiber coax deployments

Abstract

A flexible diplexer may include a programmably reconfigurable filter pair capable of rendering a variety of band-split arrangements in a digital signal processor (DSP) backed design in hybrid fiber coaxial cable plant/system deployments. The flexible diplexers may thereby meet a larger range of band-split requirements, including the full range of band-split requirements. Configurability may be achieved by digitizing the signal at either input interface of a diplexer in a diplexer/amplifier complex after bandpass filtering, and two-to-four wire conversion at the respective forward (e.g. downstream) and reverse (e.g. upstream) input interfaces. A new band-split may be obtained by updating the digital filters using specified coefficient sets determined off-line and retrieved from memory. The flexible diplexer/amplifier complex may enable the implementation of additional functionality including equalization and tilt regeneration, self-interference cancellation, virtual segmentation, and/or creation of auxiliary service points to provide access to/from a small cell base station and/or Wi-Fi access point.

Claims20

Dependent claims

A dynamically configurable diplexer, the diplexer comprising:

an upstream input port and an upstream output port configured for upstream communications over a cable network;
a downstream input port and a downstream output port configured for downstream communications over the cable network;
a pair of digital filters comprising a first digital filter coupling the upstream input port to the upstream output port and a second digital filter coupling the downstream input port to the downstream output port, wherein the pair of digital filters is programmatically configurable to simultaneously allocate a first portion of a total bandwidth of signals passing through the diplexer to the upstream communications and a second portion of the total bandwidth of the signals passing through the diplexer to the downstream communications;
and
control circuitry comprising:
an analog echo cancellation stage configured to mitigate interfering downstream signal energy to suppress an impact of the interfering downstream signal energy on data conversion and on subsequent digital processing;
and
a digital echo cancellation stage configured to mitigate residual interfering downstream signal energy that remains following mitigation performed by the analog echo cancellation stage.

5 more elements

A network node station comprising:

a bidirectional port for upstream and downstream communications;
and
a diplexer comprising:
an upstream input port and an upstream output port configured for upstream communications via the bidirectional port;
a downstream input port and a downstream output port configured for downstream communications via the bidirectional port;
a pair of digital filters comprising a first digital filter coupling the upstream input port to the upstream output port and a second digital filter coupling the downstream input port to the downstream output port, wherein the pair of digital filters is programmably configurable to allocate a first portion of a total bandwidth of signals passing through the diplexer to the upstream communications and allocate a second portion of the total bandwidth to the downstream communications;
and
control circuitry comprising:
an analog echo cancellation stage configured to mitigate interfering downstream signal energy to suppress an impact of the interfering downstream signal energy on data conversion and on subsequent digital processing;
and
a digital echo cancellation stage configured to mitigate residual interfering downstream signal energy that remains following mitigation performed by the analog echo cancellation stage.

8 more elements

A wired communication device, comprising:

a non-transitory computer-readable memory medium;
one or more processors communicatively coupled to the non-transitory computer-readable memory medium;
and
a diplexer configured to facilitate upstream and downstream communications of the wired communication device, the diplexer comprising:
an upstream input port and an upstream output port configured for the upstream communications;
a downstream input port and a downstream output port configured for the downstream communications;
and
a pair of digital filters comprising a first digital filter coupling the upstream input port to the upstream output port and a second digital filter coupling the downstream input port to the downstream output port, wherein the pair of digital filters is programmably configurable to allocate a first portion of a total bandwidth of signals passing through the diplexer to the upstream communications and allocate a second portion of the total bandwidth to the downstream communications;
and
control circuitry comprising:
an analog echo cancellation stage configured to mitigate interfering downstream signal energy to suppress an impact of the interfering downstream signal energy on data conversion and on subsequent digital processing;
and
a digital echo cancellation stage configured to mitigate residual interfering downstream signal energy that remains following mitigation performed by the analog echo cancellation stage.

10 more elements

Dependencies are inferred from the claim text.

Flexible diplexer with dynamically configurable band-split in hybrid fiber coax deployments

Life of this patent

Flexible diplexer with dynamically configurable band-split in hybrid fiber coax deployments

Life of this patent

Abstract

Claims20