A HDMI apparatus is provided. The HDMI apparatus includes a first audio/video transceiver (A/V transceiver) configured to transmit an optical A/V signal to a second A/V transceiver; and a first sideband transceiver configured to drive a first laser diode to transmit a first optical sideband signal including a first control information or a first power information; wherein the first control information or the first power information is converted by a first Serializer/Deserializer (SERDES).

Devices and methods for bypassing a defective component in a combining network relaying respective upstream and downstream signals between a head end and a plurality of subscribers. The devices and methods may preferably redirect the upstream signal without redirecting the downstream signal using a wavelength-dependent filter.

Systems and methods for achieving full duplex bidirectional transmission across coaxial cable in a hybrid fiber-coaxial cable TV network. Some preferred systems and method will attenuate reflections propagated within the coaxial cable. Other preferred systems may echo-cancel reflections propagated within the coaxial cable.

A network element of a cable television (CATV) network, said network element comprising one or more amplifier units for amplifying downstream signal transmission for digital output into one or more output channels; means for detecting output power of all active digital output channels; means for providing a predetermined correlation between the detected output power of said active digital output channels and a corresponding minimum bias current for said one or more amplifier units; and means for adjusting the bias current of said one or more amplifier units on the basis of the predetermined correlation.

A network element of a cable television (CATV) network, said network element comprising one or more amplifier units for amplifying downstream signal transmission for digital output into one or more output channels; means for detecting modulation error ratio (MER) of all active digital output channels; and means for reducing bias current of said one or more amplifier units from a predetermined value until the MER value reaches a predetermined minimum value.

Systems and methods for achieving full duplex bidirectional transmission across coaxial cable in a hybrid fiber-coaxial cable TV network. Some preferred systems and method will attenuate reflections propagated within the coaxial cable. Other preferred systems may echo-cancel reflections propagated within the coaxial cable.

Hybrid fiber/coaxial (coax) taps, and related methods and networks. The hybrid fiber/coax tap is configured to receive and convert downlink optical RF signals from a downlink distribution optical fiber to downlink electrical RF signals to be split and distributed to coax taps. Subscriber coax cables can be connected to the coax taps to “tap” the downlink electrical RF signals to subscribers. The hybrid fiber/coax tap is also configured to convert received uplink electrical RF signals on the coax taps into uplink optical RF signals to be distributed over an uplink distribution optical fiber connected to the output optical port. The hybrid fiber/coax tap also includes an input coax port configured to be connected to a coax distribution cable to receive a power signal from a coax network for powering fiber optic components. Electrical RF signals received on the coax port are passed on an output coax port to downstream taps.

Disclosed is a device communicably coupled to a power transmission line and capable of launching transverse electromagnetic waves onto the transmission line. The waves propagate data received from a data source connected to the device through a center conductor surrounded by a shield conductor. The device may include a reflector and a coupler adjacent to each other, the reflector electrically connected to the shield conductor and the coupler electrically connected to the center conductor at an unshielded connection point, wherein time-varying E-fields between the reflector and coupler are caused by the data received from the data source, and induce a transverse magnetic wave that propagates longitudinally along the surface of the transmission line.

Preventing RF signal distortion and signal error producing memory events in a Radio Frequency (RF) power amplifier (RFPA). An element, disposed prior to the Radio Frequency (RF) power amplifier (RFPA) in a signal path of a RF signal input to the RFPA, may enforce a maximum allowable amplitude in a high PAPR instantaneous high peak of the RF signal. An element may also increase or supplement a bias of the Radio Frequency (RF) power amplifier (RFPA) when a high PAPR instantaneous high peak is detected in the RF signal prior to receipt by the RFPA. Additionally, a first element operable detects when an instantaneous output voltage of the Radio Frequency (RF) power amplifier (RFPA) is below a predetermined voltage, and in response, a second element supplies additional current to prevent the output voltage of the RFPA from falling below a predetermined threshold voltage.

A framework for virtual network element of optical access networking has been designed to provide a cloud-residing core system (i.e. Mobile core controller or SDN controller) for running higher layers without requiring dedicated hardware at the edge of the network. In this framework, a service operator can create multiple optical access network connections for serving a single or multiple types of wired or wireless subscriber by programming (via software) optical ports of a Virtual Optical Edge Device to perform the desired MAC and/or PHY layer of a selected optical protocol. The Virtual Optical Edge Device in turn performs the desired PHY function or MAC and PHY function of selected protocol per each southbound port. The Virtual Optical Edge Device performs data abstraction function on all data associated with southbound ports and presents the core network a unified API via its northbound ports.