TRANSMITTER AND METHOD FOR GENERATING ADDITIONAL PARITY THEREOF

摘要

A transmitter is provided. The transmitter includes: a Low Density Parity Check (LDPC) encoder configured to encode input bits to generate an LDPC codeword including the input bits and parity bits to be transmitted in a current frame; a parity permutator configured to perform parity-permutation by interleaving the parity bits and group-wise interleaving a plurality of bit groups configuring the interleaved parity bits based on a group-wise interleaving pattern including a first pattern and a second pattern; a puncturer configured to puncture some of the parity-permutated parity bits; and an additional parity generator configured to select at least some of the punctured parity bits to generate additional parity bits to be transmitted in a previous frame of the current frame, based on the first pattern and the second pattern, wherein the first pattern determines parity bits to remain after the puncturing and then to be transmitted in the current frame.

主权项

1. A transmitter comprising:
a Low Density Parity Check (LDPC) encoder configured to encode input bits to generate parity bits; a parity permutator configured to group-wise interleaves a plurality of bit groups constituting the parity bits based on a group-wise interleaving pattern comprising a first pattern and a second pattern; a puncturer configured to puncture some of the group-wise interleaved parity bits; and an additional parity generator configured to select bits among the group-wise interleaved parity bits to generate additional parity bits to be transmitted in a previous frame of a current frame, wherein the additional parity bits are determined according to the first pattern and the second pattern, and wherein the first pattern determines parity bits to remain after the puncturing and then to be transmitted in the current frame