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Coding for Segmented Edit Channels.

Accepted version
Peer-reviewed

Type

Article

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Authors

Venkataramanan, Ramji  ORCID logo  https://orcid.org/0000-0001-7915-5432
Fabregas, Albert Guillen I 

Abstract

We consider insertion and deletion channels with the additional assumption that the channel input sequence is implicitly divided into segments such that at most one edit can occur within a segment. No segment markers are available in the received sequence. We propose code constructions for the segmented deletion, segmented insertion, and segmented insertion-deletion channels based on subsets of Varshamov-Tenengolts codes chosen with pre-determined prefixes and/or suffixes. The proposed codes, constructed for any finite alphabet, are zero-error and can be decoded segment-by-segment. We also derive an upper bound on the rate of any zero-error code for the segmented edit channel, in terms of the segment length. This upper bound shows that the rate scaling of the proposed codes as the segment length increases is the same as that of the maximal code.

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Journal Title

IEEE Trans. Inf. Theory

Conference Name

Journal ISSN

Volume Title

64

Publisher

IEEE
Sponsorship
European Research Council (259663)
European Research Council (725411)