Journal of Systems Engineering and Electronics ›› 2020, Vol. 31 ›› Issue (4): 657-665.doi: 10.23919/JSEE.2020.000041

• Electronics Technology • Previous Articles     Next Articles

Joint synchronization estimation based on genetic algorithm for OFDM/OQAM systems

Yongjin LIU*(), Xihong CHEN(), Yu ZHAO()   

  • Received:2019-08-07 Online:2020-08-25 Published:2020-08-25
  • Contact: Yongjin LIU E-mail:liuyongjinDW@163.com;xhchen0315217@163.com;13636810730@163.com
  • About author:LIU Yongjin was born in 1990. He received his B.S. and M.S. degrees in armament science and technology from Air force Engineering University in 2014 and 2017 respectively. He is currently pursuing his Ph.D. degree in Air force Engineering University, Xi’an, China. His research interests include wireless communications, synchronization and dilter design for OFDM/OQAM systems and troposcatter com munication. E-mail: liuyongjinDW@163.com|CHEN Xihong was born in 1961. He received his M.S. degree in communication engineering from Xidian University, Xi’an, in 1992 and Ph.D. degree from the Missile College of Air Force Engineering University (AFEU) in 2010. He is a professor with the Air and Missile Defense College, AFEU, Xi’an. His research interests include information theory, information security and signal processing. E-mail: xhchen0315217@163.com|ZHAO Yu was born in 1989. He received his M.S. degree and Ph.D. degree in 2011 and 2015, respectively, from Air Force Engineering University (AFEU), Xi’an. He is currently doing postdoctoral research on electrical science and technology at the Air and Missile Defense College, AFEU. His research interests include information theory, multicarrier modulation techniques and deep learning in physical layer of wireless communications. E-mail: 13636810730@163.com
  • Supported by:
    the National Natural Science Foundation of China(61671468);This work was supported by the National Natural Science Foundation of China (61671468)

Abstract:

710051, China Abstract: This paper investigates the problem of synchronization for offset quadrature amplitude modulation based orthogonal frequency division multiplexing (OFDM/OQAM) systems based on the genetic algorithm. In order to increase the spectrum efficiency, an improved preamble structure without guard symbols is derived at first. On this basis, instead of deriving the log likelihood function of power spectral density, joint estimation of the symbol timing offset and carrier frequency offset based on the preamble proposed is formulated into a bivariate optimization problem. After that, an improved genetic algorithm is used to find its global optimum solution. Conclusions can be drawn from simulation results that the proposed method has advantages in the joint estimation of synchronization.

Key words: offset quadrature amplitude modulation based orthogonal frequency division multiplexing (OFDM/OQAM), synchronization, joint estimation, genetic algorithm