BITWISE OPERATIONS AND APPARATUS IN A MULTI-LEVEL SYSTEM

摘要

A system uses multi-level encoding where each symbol of a plurality of symbols represents more than one bit of information in a user data symbol stream for transfer using a multilevel transmission channel. The user data symbols are represented in a digital bitwise form such that each symbol is presented as a plurality of bits and each bit is subject to a different probability of error. An error correction procedure is applied based on the different error probability that is associated with each bit in the plurality. The channel can be configured to support a mosaic tile structure, each tile containing a channel symbol such that a selected tile has a collective error probability that is different from other tiles. Customized coding can be applied to the tile structure to allocate a selected amount of error correction power to the selected tile based on an overall available correction power.

主权项

1. In a system which uses multi-level data encoding where each symbol of a plurality of user data symbols represents more than one bit of information in a user data symbol stream for transfer using a multilevel transmission channel, a controller comprising:
a data transfer section for representing said user data symbols, in relation to said transfer, in a digital bitwise form such that each symbol is presented as a plurality of bits where each bit in the plurality of bits is subject to a different probability of error; and an error correction section for applying an error correction procedure to the plurality of bits, for the bitwise digital form of each user data symbol that is transferred, based on the different error probability that is associated with each bit in the plurality of bits such that an error correction power for at least one bit of the plurality of bits is different than another error correction power that is associated with another one of the plurality of bits.