Novel Degree Distribution Function for LT codes over Finite Field

Abstract

Luby Transform (LT) code over finite field is a recent research topic. In order to find out the properties of LT codes over finite field, a novel degree distribution function is proposed in this paper. The main thinking of our developed distribution function is to improve the decoding success rate with the same overhead, and still to keep the sparse property for the encoding matrix. Numerical simulations are used to show the general performance of our novel function. Various simulation results show that in the environment of LT codes over finite field, our new degree distribution function performs much better than the degree distribution functions proposed by Luby as the field size increasing. In conclusion, our novel degree distribution function is more suitable to be used in LT codes over finite field.