Author(s)

Dajian Liao, Yuansheng Tang

College of Science, Huaihai Institute of Technology, Lianyungang, China.

We study (1 + 2v)-constacyclic codes overR + vR and their Gray images, where v² + v = 0 and R is a finite chain ring with maximal ideal <λ> and nilpotency index e. It is proved that the Gray map images of a (1 + 2v)-constacyclic codes of length n over R + vR are distance-invariant linear cyclic codes of length 2n over R. The generator polynomials of this kind of codes for length n are determined, where n is relatively prime to p, p is the character of the field R/<λ> . Their dual codes are also discussed.

Frobenius Ring; Constacyclic Codes; Generator Polynomial; Dual Codes

D. Liao and Y. Tang, "A Class of Constacyclic Codes over R + vR and Its Gray Image," International Journal of Communications, Network and System Sciences, Vol. 5 No. 4, 2012, pp. 222-227. doi: 10.4236/ijcns.2012.54029.