Maximum spectral efficiency of amplify-and-forward cooperative transmission with multiple relays

Jae Woo Kwon, Young Chai Ko, Hong Chuan Yang

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


In this paper, we propose a new amplify-and-forward (AF) cooperative transmission scheme with adaptive modulation to maximize overall system spectral efficiency. We quantify the average spectral efficiency performance of the proposed scheme through statistical analysis based on an upper bound of the combiner output signal-to-noise ratio (SNR) and obtain the closed-form solutions for some practical scenarios of interest.

Original languageEnglish
Article number5638819
Pages (from-to)49-54
Number of pages6
JournalIEEE Transactions on Wireless Communications
Issue number1
Publication statusPublished - 2011 Jan

Bibliographical note

Funding Information:
Manuscript received April 14, 2010; revised August 12, 2010; accepted September 27, 2010. The associate editor coordinating the review of this letter and approving it for publication was J. Olivier. J.-W. Kwon and Y.-C. Ko are with the School of Electrical Engineering, Korea University, Seoul, Korea (e-mail: {kwonjaewoo, koyc} H.-C. Yang is with the Dept. of Electrical and Computer Engineering, University of Victoria, Victoria, BC, Canada (e-mail: This work was supported in part by the Seoul R&BD Program (ST 090852) and in part by a Korea University Grant. This paper was presented in part at the IEEE International Conference on Wireless Information Technology and Systems, Honolulu, USA, August 2010. Digital Object Identifier 10.1109/TWC.2010.110910.100603


  • Spectral efficiency
  • adaptive modulation
  • and Nakagami-m fading
  • communication with relays

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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