Finite length buffer relaying based incremental hybrid decode-amplify-forward cooperative system

Abstract

In this paper, we present a finite length buffer relaying based incremental hybrid decode-amplify-forward (FLBR-IHDAF) cooperative scheme considering the high data validity instead of instantaneity in cooperative communication. The FLBR-IHDAF scheme originates from the opportunistic relaying based incremental hybrid decode-amplify-forward (OR-IHDAF) scheme and infinite length buffer relaying (ILBR) scheme, which obtains their advantages and utilizes the state of the buffer in each relay to select the suitable cooperative scheme. The proposed scheme can improve the system outage probability at the cost of a certain instantaneity and hardware complexity, which plays an important role in the non time-sensitive systems. Numerical results show the significant performance improvement of the FLBR-IHDAF scheme compared with OR-IHDAF and hybrid relay selection (HRS) cooperative schemes.