TITLE:
Rate Adaptation for Decoding-and-Forward Relay Channel by Random Projections Codes
AUTHORS:
Min Wang, Qin Zou, Caihui Liu
KEYWORDS:
Rate Adaptation, Decoding-and-Forward Relay, Random Projections Codes, Rateless Code
JOURNAL NAME:
Journal of Computer and Communications,
Vol.4 No.4,
April
27,
2016
ABSTRACT: This paper investigates rate adaptation schemes for
decoding-and-forward (DF) relay system based on random projections codes (RPC).
We consider a classic three node relay system model, where relay node performs
on half-duplex mode. Then, we give out receiving diversity relay scheme and
coding diversity relay scheme, and present their jointly decoding methods.
Furthermore, we discuss the performance of the two schemes with different power
allocation coefficients. Simulations show that our relay schemes can achieve
different gain with the help of relay node. And, we should allocate power to
source node to just guarantee relay node can decode successfully, and allocate
remain power to relay node as far as possible. In this way, this DF relay
system not only achieves diversity gain, but also achieves higher and smooth
spectrum efficiency.