@article{(Open Science Index):https://publications.waset.org/pdf/10005200,
	  title     = {Adaptive Transmission Scheme Based on Channel State in Dual-Hop System},
	  author    = {Seung-Jun Yu and  Yong-Jun Kim and  Jung-In Baik and  Hyoung-Kyu Song},
	  country	= {},
	  institution	= {},
	  abstract     = {In this paper, a dual-hop relay based on channel state is studied. In the conventional relay scheme, a relay uses the same modulation method without reference to channel state. But, a relay uses an adaptive modulation method with reference to channel state. If the channel state is poor, a relay eliminates latter 2 bits and uses Quadrature Phase Shift Keying (QPSK) modulation. If channel state is good, a relay modulates the received symbols with 16-QAM symbols by using 4 bits. The performance of the proposed scheme for Symbol Error Rate (SER) and throughput is analyzed.},
	    journal   = {International Journal of Electronics and Communication Engineering},
	  volume    = {10},
	  number    = {8},
	  year      = {2016},
	  pages     = {1083 - 1086},
	  ee        = {https://publications.waset.org/pdf/10005200},
	  url   	= {https://publications.waset.org/vol/116},
	  bibsource = {https://publications.waset.org/},
	  issn  	= {eISSN: 1307-6892},
	  publisher = {World Academy of Science, Engineering and Technology},
	  index 	= {Open Science Index 116, 2016},
	}