Journal of Systems Engineering and Electronics ›› 2020, Vol. 31 ›› Issue (4): 685-691.doi: 10.23919/JSEE.2020.000022

• Electronics Technology • Previous Articles     Next Articles

BER-based relay selection strategy for cooperative communication

Peiyao YANG1,*(), Hai LI2(), Shujuan HOU2(), Liuqing YANG1()   

  1. 1 Beijing Institute of Spacecraft System Engineering, China Academy of Space Technology, Beijing 100094, China
    2 School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China
  • Received:2019-07-05 Online:2020-08-25 Published:2020-08-25
  • Contact: Peiyao YANG;;;
  • About author:YANG Peiyao was born in 1989. He received his B.S. and Ph.D. degrees in information and communication engineering from Beijing Institute of Technology in 2011 and 2018, respectively. His main research interests include relay communication, and deep space communication. E-mail:|LI Hai was born in 1972. He received his B.S. and Ph.D. degrees in information and communication engineering from Beijing Institute of Technology in 1997 and 2002, respectively. He is currently working at Beijing Institute of Technology as an associate professor. His research interests include embedded system design and communication protocol engineering. E-mail:|HOU Shujuan was born in 1977. She received her Ph.D. degree in signal and information processing from Beijing Institute of Technology in 2005. Currently, she is an associate professor of signal and information processing in Beijing Institute of Technology. Her main research interest includes signal processing of mobile communication systems. E-mail:|YANG Liuqing was born in 1984. She received her M.S. degree in information and communication engineering from Beihang University in 2010. Her main research interests include deep space communication and autonomous health management. E-mail:
  • Supported by:
    This work was supported by the Pre-Research Foundation of China


In this paper, a bit error ratio (BER)-based relay selection strategy is investigated under opportunistic relay selection. The challenging problem is to design the relay selection rule so that the relay is able to measure the performance of the cooperative system at the destination exactly with low computation costs. This paper derives a closed-form expression of the end-to-end bit error rate firstly. Then, an approximate BER expression based on the relationship between the instantaneous signal-to-noise ratio (SNR) of the relay-to-destination link and the probability of error propagation is derived. Finally, a simplified relay selection formula is proposed. Simulation results prove that the proposed relay selection rule can reflect the BER of each relay properly as well.

Key words: cooperative communication, relay selection, demodulate-and-forward