Multiple interleavers in a coding system

摘要

Second interleaved data is de-interleaved using a second interleaving mapping to obtain encoded data. The second interleaved data includes a copy of constrained data in the same sequence and having the same values as the constrained data. Also, the portion of the second interleaved data that includes the copy of the constrained data satisfies a modulation constraint associated with limiting a number of consecutive events to a maximum number of consecutive events. The encoded data is decoded to obtain first interleaved data and the first interleaved data is de-interleaved using a first interleaving mapping to obtain the constrained data, a copy of which is included in the second interleaved data, where the constrained data satisfies the modulation constraint.

主权项

1. A system for processing data, comprising:
a second de-interleaver configured to de-interleave second interleaved data using a second interleaving mapping to obtain encoded data, wherein:
de-interleaving the second interleaved data using the second interleaving mapping includes reordering contents of the second interleaved data using the second interleaving mapping; andat least a portion of the second interleaved data satisfies a modulation constraint associated with limiting a number of consecutive events to a maximum number of consecutive events; a decoder configured to decode the encoded data to obtain first interleaved data; and a first de-interleaver configured to de-interleave the first interleaved data using a first interleaving mapping to obtain constrained data, a copy of which is included in the second interleaved data, wherein the constrained data satisfies the modulation constraint and de-interleaving the first interleaved data using the first interleaving mapping to obtain the constrained data includes reordering the first interleaved data using the first interleaving mapping to obtain the constrained data in a same sequence as the sequence of the copy included in the second interleaved data.