title: Novel Blind Recognition Algorithm of Frame Synchronization Words Based on Soft-Decision in Digital Communication Systems.
abstract: A novel blind recognition algorithm of frame synchronization words is proposed to recognize the frame synchronization words parameters in digital communication systems. In this paper, a blind recognition method of frame synchronization words based on the hard-decision is deduced in detail. And the standards of parameter recognition are given. Comparing with the blind recognition based on the hard-decision, utilizing the soft-decision can improve the accuracy of blind recognition. Therefore, combining with the characteristics of Quadrature Phase Shift Keying (QPSK) signal, an improved blind recognition algorithm based on the soft-decision is proposed. Meanwhile, the improved algorithm can be extended to other signal modulation forms. Then, the complete blind recognition steps of the hard-decision algorithm and the soft-decision algorithm are given in detail. Finally, the simulation results show that both the hard-decision algorithm and the soft-decision algorithm can recognize the parameters of frame synchronization words blindly. What's more, the improved algorithm can enhance the accuracy of blind recognition obviously.
authors.affiliation: College of Mechatronic Engineering and Automation, National University of Defense Technology, Changsha 410073, Hunan Province, P.R. China.
authors.forename: Jiangyi
authors.initials: J
authors.lastname: Qin
authors.affiliation: College of Mechatronic Engineering and Automation, National University of Defense Technology, Changsha 410073, Hunan Province, P.R. China.
authors.forename: Zhiping
authors.initials: Z
authors.lastname: Huang
authors.affiliation: College of Mechatronic Engineering and Automation, National University of Defense Technology, Changsha 410073, Hunan Province, P.R. China.
authors.forename: Chunwu
authors.initials: C
authors.lastname: Liu
authors.affiliation: College of Mechatronic Engineering and Automation, National University of Defense Technology, Changsha 410073, Hunan Province, P.R. China.
authors.forename: Shaojing
authors.initials: S
authors.lastname: Su
authors.affiliation: College of Mechatronic Engineering and Automation, National University of Defense Technology, Changsha 410073, Hunan Province, P.R. China.
authors.forename: Jing
authors.initials: J
authors.lastname: Zhou
mesh_terms: D000465:Algorithms; D003142:Communication; D003198:Computer Simulation; D006801:Humans; D014825:Vocabulary