On cooperative NOMA relay selection under Nakagami-m fading and imperfect channel estimation Academic Article uri icon


  • AbstractNonorthogonal multiple access (NOMA), which is an effective technique to achieve high spectral efficiency, has been emerging as a candidate for the fifthgeneration multiple access. In addition, NOMA reflects a transition on the forms of power allocation comparing with the orthogonal multiple access (OMA). In this paper, two relay selection schemes are considered to evaluate the achieved performance of a NOMAbased relaying network, ie, the maxmin relay selection (MMRS) and the twostage relay selection (TSRS) schemes. Exact expression analyses for the system outage probability using the MMRS and TSRS schemes are derived to evaluate the system performance under Nakagamim fading. The existence of the error floor, caused by the estimation error, is confirmed by the detailed analysis of the asymptotic result. By comparing NOMA with OMA, and comparing the MMRS scheme with the TSRS scheme, one can reveal that cooperative NOMA under Nakagamim fading and imperfect channel estimation can maintain superior performance gain than OMA.

published proceedings


author list (cited authors)

  • Zhang, Y., Ge, J., Serpedin, E., Radaydeh, R. M., & Hu, Y.

citation count

  • 5

complete list of authors

  • Zhang, Yangyang||Ge, Jianhua||Serpedin, Erchin||Radaydeh, Redha M||Hu, Yifan

publication date

  • December 2018