Loading jsMath...
Weizmann Logo
ECCC
Electronic Colloquium on Computational Complexity

Under the auspices of the Computational Complexity Foundation (CCF)

Login | Register | Classic Style



REPORTS > DETAIL:

Paper:

TR11-154 | 17th November 2011 21:09

From Irreducible Representations to Locally Decodable Codes

RSS-Feed




TR11-154
Authors: Klim Efremenko
Publication: 18th November 2011 04:20
Downloads: 3854
Keywords: 


Abstract:

Locally Decodable Code (LDC) is a code that encodes a message in a way that one can decode any particular symbol of the message by reading only a constant number of locations, even if a constant fraction of the encoded message is adversarially
corrupted.

In this paper we present a new approach for the construction of LDCs. We show that if there exists an irreducible representation (\rho, V) of G and q elements g_1,g_2,\ldots, g_q
in G such that there exists a linear combination of matrices \rho(g_i) that is of rank one,
then we can construct a q-query Locally Decodable Code
C:V\rightarrow \F^G.

We show the potential of this approach by constructing constant query LDCs of sub-exponential length matching the parameters of the best known constructions.



ISSN 1433-8092 | Imprint