Title
How Many Weights Can a Quasi-Cyclic Code Have?
Abstract
We investigate the largest number of nonzero weights of quasi-cyclic codes. In particular, we focus on the function Γ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Q</sub> (n, ℓ, k, q), that is defined to be the largest number of nonzero weights a quasi-cyclic code of index gcd(ℓ, n), length n and dimension k over F <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">q</sub> can have, and connect it to similar functions related to linear and cyclic codes. We provide several upper and lower bounds on this function, using different techniques and studying its asymptotic behavior. Moreover, we determine the smallest index for which a q-ary Reed-Muller code is quasi-cyclic, a result of independent interest.
Year
DOI
Venue
2020
10.1109/TIT.2020.3001591
IEEE Transactions on Information Theory
Keywords
DocType
Volume
Quasi-cyclic codes,weights,q-ary Reed-Muller codes
Journal
66
Issue
ISSN
Citations 
11
0018-9448
1
PageRank 
References 
Authors
0.37
0
3
Name
Order
Citations
PageRank
Minjia Shi12820.11
Alessandro Neri2146.10
Patrick Solé363689.68