JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2011, Vol. 41 ›› Issue (1): 7-11.

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Adaptive modulated cooperative communication based on relay selection and power allocation

LI Rong-kai1,2, BAI Zhi-quan1   

  1. 1. School of Information  Science and  Engineering, Shandong University, Jinan 250100, China;
    2. National Key Lab of ISN, Xidian University, Xi’an 710071, China
  • Received:2010-10-28 Online:2011-02-16 Published:2010-10-28

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Abstract:

Cooperative communication technology can exploit spatial diversity to improve system performance. In the case that the channel state information is known at the source node, a larger power gain can be obtained. A new scheme of adaptive modulation for a cooperative system was presented. This scheme utilized spacetime coding, a power allocation algorithm and relay selection technique, which significantly improved the system throughput with a certain bit error rate requirement. The performance of the proposed scheme was compared with the other existing adaptive and non-adaptive schemes. The results showed that the proposed adaptive modulation scheme had superior average throughput performance and could stably satisfy the bit error rate constraint.
 

Key words: cooperative communication, adaptive modulation, throughput

[1] BAI Zhi-quan, JIA Jian-lan, YANG Xiang-lai, CUI Juan. The Lagrange algorithm based relay selection and power optimization in a cooperative system [J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2012, 42(3): 25-30.
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