Resilient channel and broadcast modulation
Methods, systems, and apparatuses can provide a plurality of RF channels and outputs using digital modulation and combining. In various examples, generation of digital IQ packetized data in combination with digital switching can increase the number of RF modulated channels, optimize broadcast transmission and/or provide transmission resiliency.
1. An edge modulation system, comprising:
a controller operable to receive incoming digital data streams and process the incoming digital data streams and direct the incoming digital data streams for modulation;
one or more I/Q generators operable to receive the processed incoming data streams and to convert digital data contained within the incoming data streams to in-phase and quadrature components;
one or more modulator subsystems operable to receive the in-phase and quadrature components from the controller and to modulate the processed incoming data streams for transmission over an access network, wherein the modulator subsystem is further operable to digitally combine the in-phase and quadrature components with normal service data received directly from the controller;
wherein each of the one or more I/Q generators comprise:
an I/Q generator media access controller operable to provide control and processing for information received from or destined for a switch in the controller;
a channel coding module operable to receive data from the I/Q generator media access controller, perform digital I/Q channel coding including forward error correction (FEC) interleaving on the data and provide convolutional encoding and symbol mapping for the access network; and
an I/Q encapsulation device operable to packetize I/Q digital data received from the channel coding module.
2. The edge modulation system of claim 1 , wherein the controller comprises the switch operable to receive video, data and voice streams, the switch being operable to forward the video, data and voice streams to the one or more I/Q generators or one or more modulator subsystems responsive to a packet processor.
3. The edge modulation system of claim 2 , wherein the switch is further operable to provide a backup interface operable to couple the edge modulation system to an external switch.
4. The edge modulation system of claim 3 , wherein the backup interface facilitates providing a backup I/Q generator to a second edge modulation system upon failure of one or more components of the second edge modulation system.
5. The edge modulation system of claim 3 , wherein the backup interface facilitates providing a backup I/Q generator to the edge modulation system from a second edge modulation system upon failure of one or more components of the edge modulation system.
6. The edge modulation system of claim 1 , wherein the one or more modulator subsystems comprise: a modulator media access controller operable to provide non-packetized video, data and voice information to a modulator channel coding module and packetized I/Q data to a modulator I/Q decapsulation module; the modulator I/Q decapsulation module operable to de-packetize the I/Q data and provide I/Q digital data to the digital modulator; the modulator channel coding module operable to receive data from the modulator media access controller and to perform digital I/Q channel coding on the data; the digital modulator operable to receive the I/Q digital data from the modulator I/Q decapusulation module or the modulator channel coding module and to perform channel shaping, and combine channels into channel blocks, the digital modulator is also operable to upsample the channel blocks and digitally modulate the I/Q digital data with a carrier frequency and interpolate the modulated data to a sample frequency; and a digital analog converter operable to sample at the sample frequency operable to provide a direct analog synthesis of the output of the digital modulator for output to a physical layer.
7. A computer-implemented method, comprising:
receiving incoming digital data streams by a controller;
directing the incoming digital data streams to one of one or more modulators or one or more I/Q generators by the controller;
converting digital data contained within the incoming data streams to in-phase and quadrature components at the one or more I/Q generators;
receiving the in-phase and quadrature components from the controller at the one or more modulators;
digitally combining the in-phase and quadrature components with normal service data received directly from the controller; and
modulating at the one or more modulators the digitally combined in-phase and quadrature components for transmission over an access network; and
wherein the one or more I/Q generators are operable to provide an I/Q generator media access controller operable to provide control and processing for information received from or destined for a switch in the controller, a channel coding module operable to receive data from the I/Q generator media access controller, perform digital I/Q channel coding on the data and provide convolutional encoding and symbol mapping for the access network, and an I/Q encapsulation device operable to packetize I/Q digital data received from the channel coding module.
8. The method of claim 7 , wherein directing comprises using the switch to forward the video, data and voice streams to the one or more I/Q generators or one or more modulators responsive to a packet processor.
9. The method of claim 8 , further comprising providing a backup interface operable at the switch to couple an edge modulation system to an external switch.
10. The method of claim 9 , wherein the backup interface facilitates providing a backup I/Q generator to a second edge modulation system upon failure of one or more components of a system used in the method.
11. The method of claim 7 , wherein the one or more modulators are operable to provide a modulator media access controller operable to provide non-packetized video, data and voice information to a modulator channel coding module and packetized I/Q data to a modulator I/Q decapsulation module, wherein the modulator I/Q decapsulation module operable to de-packetize the I/Q data and provide I/Q digital data to a digital modulator, the modulator channel coding module operable to receive data from the modulator media access controller and to perform digital I/Q channel coding on the data, the digital modulator operable to receive I/Q digital data from the modulator I/Q decapusulation module or the modulator channel coding module and to perform channel shaping, and combine channels into channel blocks, the digital modulator is also operable to upsample the channel blocks and digitally modulate the I/Q digital data with a carrier frequency and interpolate the modulated data to a sample frequency, and a digital analog convertor operable to sample at the sample frequency operable to provide a direct analog synthesis of the output of the digital modulator for output to a physical layer.