Method and system for digital video broadcast for cable (DVB-C2)

摘要

Methods and systems for DVB-C2 are disclosed and may include receiving data encoded utilizing variable encoding, variable modulation and outer codes via a physical layer matched to a desired quality of service. An error probability may be determined for said received data and retransmission of portions of said data with error probability above an error threshold may be requested. The variable modulation may include single carrier modulation, orthogonal frequency division modulation, synchronous code division multiple access, and/or from 256 QAM to 2048 QAM or greater. The variable encoding may include forward error correction code, which may include low density parity check code.

主权项

1. An apparatus comprising:
at least one processor configured to:
encode a first signal using a first forward error correction (FEC) code to generate a first plurality of symbols;encode a second signal using a second FEC code to generate a second plurality of symbols;map the first plurality of symbols to a first constellation, having a first size with a first plurality of constellation points, selected based on a first signal to noise ratio (SNR) associated with a first receiver, to generate a first signal; andmap the second plurality of symbols to a second constellation, having a second size with a second plurality of constellation points, selected based on a second SNR associated with a second receiver, to generate a second signal; a frame assembler configured to assemble a frame using the first signal and the second signal; and a modulator configured to transmit the frame via a communication channel to the first receiver and the second receiver, wherein the second constellation, having the second size with the second plurality of constellation points, including more constellation points and to provide greater throughput than the first constellation, having the first size with the first plurality of constellation points.