Journal of Computer and Communications

Volume 4, Issue 4 (April 2016)

ISSN Print: 2327-5219   ISSN Online: 2327-5227

Google-based Impact Factor: 1.12  Citations  

Rate Adaptation for Decoding-and-Forward Relay Channel by Random Projections Codes

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DOI: 10.4236/jcc.2016.44015    1,780 Downloads   2,364 Views  

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.

Share and Cite:

Wang, M. , Zou, Q. and Liu, C. (2016) Rate Adaptation for Decoding-and-Forward Relay Channel by Random Projections Codes. Journal of Computer and Communications, 4, 169-179. doi: 10.4236/jcc.2016.44015.

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