Quantized-Constraint Concatenation and the Covering Radius of Constrained Systems

Research output: Contribution to journalArticlepeer-review

Abstract

We introduce a novel framework for implementing error-correction in constrained systems. The main idea of our scheme, called Quantized-Constraint Concatenation (QCC), is to employ a process of embedding the codewords of an error-correcting code in a constrained system as a (noisy, non-invertible) quantization process. This is in contrast to traditional methods, such as concatenation and reverse concatenation, where the encoding into the constrained system is reversible. The possible number of channel errors QCC is capable of correcting is linear in the block length <italic>n</italic>, improving upon the <italic>O</italic>(&#x221A;<italic>n</italic>) possible with the state-of-the-art known schemes. For a given constrained system, the performance of QCC depends on a new fundamental parameter of the constrained system &#x2013; its covering radius. Motivated by QCC, we study the covering radius of constrained systems in both combinatorial and probabilistic settings. We reveal an intriguing characterization of the covering radius of a constrained system using ergodic theory. We use this equivalent characterization in order to establish efficiently computable upper bounds on the covering radius.

Original languageAmerican English
Pages (from-to)1
Number of pages1
JournalIEEE Transactions on Information Theory
DOIs
StateAccepted/In press - 1 Jan 2023

Keywords

  • Constrained systems
  • covering radius
  • Decoding
  • Electronic mail
  • Encoding
  • Error correction codes
  • error-correcting codes
  • Hamming distances
  • Markov chains
  • Quantization (signal)
  • sliding-block codes
  • Upper bound

All Science Journal Classification (ASJC) codes

  • Information Systems
  • Computer Science Applications
  • Library and Information Sciences

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