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Journal of Electrical and Computer Engineering
Volume 2016, Article ID 6349341, 7 pages
Research Article

An Optimization Synchronization Algorithm for TDDM Signal

School of Information Science and Engineering, Shenyang Ligong University, Shenyang 110159, China

Received 31 May 2016; Accepted 5 September 2016

Academic Editor: Jit S. Mandeep

Copyright © 2016 Fang Liu and Yongxin Feng. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The time division data modulation (TDDM) mechanism is recommended to improve the communications quality and enhance the antijamming capability of the spread spectrum communication system, which will be used in the next generation global navigation satellite (GNSS) systems. According to the principle and the characteristics of TDDM signal, an optimization synchronization algorithm is proposed. In the new algorithm, the synchronization accuracy and environmental adaptability have been improved with the special local sequence structure, the multicorrelation processing, and the proportion threshold mechanism. Thus, the inversion estimation formula was established. The simulation results demonstrate that the new algorithm can eliminate the illegibility threat in the synchronization process and can adapt to a lower SNR. In addition, this algorithm is better than the traditional algorithms in terms of synchronization accuracy and adaptability.