Using Short Synchronous WOM Codes to Make WOM Codes Decodable
Artikel i vetenskaplig tidskrift, 2014

In the framework of write-once memory (WOM) codes, it is important to distinguish between codes that can be decoded directly and those that require the decoder to know the current generation so as to successfully decode the state of the memory. A widely used approach to constructing WOM codes is to design first nondecodable codes that approach the boundaries of the capacity region and then make them decodable by appending additional cells that store the current generation, at an expense of rate loss. In this paper, we propose an alternative method to making nondecodable WOM codes decodable by appending cells that also store some additional data. The key idea is to append to the original (nondecodable) code a short synchronous WOM code and write generations of the original code and the synchronous code simultaneously. We consider both the binary and the nonbinary case. Furthermore, we propose a construction of synchronous WOM codes, which are then used to make nondecodable codes decodable. For short-to-moderate block lengths, the proposed method significantly reduces the rate loss as compared to the standard method.

Författare

Nicolas Bitouzé

University of California, Los Angeles

Telecom Bretagne

Alexandre Graell i Amat

Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

Eirik Rosnes

Simula Research Laboratory

Ceragon Networks AS

Universitetet i Bergen

IEEE Transactions on Communications

0090-6778 (ISSN)

Vol. 62 2156-2169 6815644

Styrkeområden

Informations- och kommunikationsteknik

Ämneskategorier

Kommunikationssystem

DOI

10.1109/TCOMM.2014.2323308