DVB-S2系统鲁棒可靠的帧同步方法

Yulong Zhang, Xubin Chen, Wenhua Fan, Jun Han, Xiaoyang Zeng
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引用次数: 7

摘要

针对星载DVB-S2系统,提出了一种鲁棒可靠的帧同步方法。为了在低信噪比和大载波频偏条件下准确、快速地实现帧同步,研究了一种将导频符号辅助微分相关与双峰搜索算法相结合的帧同步方案,并通过大量仿真进行了分析评估。仿真结果表明,与现有算法相比,该方法具有较低的复杂度开销,实现了较低的误同步概率。此外,获取帧同步的时间减少到理想的水平,即使在比指定的更差的信道条件下。
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Robust and reliable frame synchronization method for DVB-S2 system
In this paper, a robust and reliable frame synchronization method is developed for satellite-based DVB-S2 system. To perform frame synchronization accurately and rapidly under the condition of low signal-to-noise ratios and large carrier frequency offset, a novel frame synchronization scheme combining pilot-symbol-assisted differential correlation with double-peak search algorithm is analytically investigated and evaluated by extensive simulations. Simulation results show that the proposed method can achieve much lower false synchronization probability in comparison with the existing ones with low complexity overhead. Furthermore, time to acquire frame synchronization is reduced to a desirable level, even under much worse channel condition than specified.
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