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计算机工程 ›› 2011, Vol. 37 ›› Issue (2): 258-260. doi: 10.3969/j.issn.1000-3428.2011.02.091

• 开发研究与设计技术 • 上一篇    下一篇

一种改进的DVB-S2接收机帧同步方案

张玉龙,陈绪斌,吴 川,曾晓洋   

  1. (复旦大学专用集成电路与系统国家重点实验室,上海 201203)
  • 出版日期:2011-01-20 发布日期:2011-01-25
  • 作者简介:张玉龙(1986-),男,硕士研究生,主研方向:集成电路设计;陈绪斌,硕士研究生;吴 川,博士研究生;曾晓洋,教授、博士生导师
  • 基金资助:
    上海市科委基金资助项目(08700741100)

Improved Frame Synchronization Scheme for DVB-S2 Receiver

ZHANG Yu-long, CHEN Xu-bin, WU Chuan, ZENG Xiao-yang   

  1. (State Key Laboratory of ASIC and System, Fudan University, Shanghai 201203, China)
  • Online:2011-01-20 Published:2011-01-25

摘要: 帧同步是DVB-S2系统接收机进行解调的基础。通过对已有帧同步方案进行综合研究和比较,提出一种改进的基于导频符号相关辅助和双峰值检测的DVB-S2接收机帧同步方案。与已有方法相比,该方案明显降低了帧同步错误概率,运算复杂度较低。实验结果表明,即使在DVB-S2标准规定的最恶劣的条件下(5 MHz归一化载波频偏和-2.35 dB的信噪比),该方案仍能快速准确地完成帧同步。

关键词: 帧同步, DVB-S2系统, 导频符号相关, 双峰值检测

Abstract: Frame synchronization is the basis of DVB-S2 demodulation. With the comprehensive study and comparison of the existing methods, this paper presents an improved frame synchronization scheme for DVB-S2 system based on pilot symbols correlation and double-peak detection. The proposed scheme reduces the false synchronization probability significantly with relatively lower computational complexity in contrast to the existing methods, which is evaluated by extensive experiments. In addition, it can acquire frame synchronization rapidly and correctly even under the worst channel condition specified by DVB-S2 standard (5 MHz frequency offset and -2.35 dB signal-to-noise ratio).

Key words: frame synchronization, DVB-S2 system, pilot symbols correlation, double-peak detection

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