A Modi ed Concatenated Coding Scheme , withApplications to Magnetic Data
نویسنده
چکیده
When block modulation codes are concatenated with an error-correction code (ECC) in the standard way, the use of long block lengths results in error-propagation. This paper analyzes the performance of modiied con-catenation, which involves reversing the order of modulation and ECC. This modiied scheme reduces error propagation, provides greater exibil-ity in the choice of parameters, and facilitates soft-decision decoding, with little or no loss in transmission rate. In particular, examples are presented which show how this technique can allow fewer interleaves per sector in hard disk drives, and permit the use of sophisticated block modulation codes which are better suited to the channel.
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تاریخ انتشار 1997