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This paper presents a frame synchronization algorithm for the orthogonal time frequency and space (OTFS) system, utilizing cyclic prefix (CP) auto-correlation and signal sparsity in the delay-Doppler (DD) domain. The synchronization algorithm comprises two steps. Initially, this algorithm employs CP auto-correlation for the raw synchronization. This initial step is crucial as it significantly reduces the search space and computation for the subsequent synchronization step, thereby improving efficiency. Following this, the fine synchronization is achieved by leveraging the sparsity feature of the received signal in the DD domain as well as the single pilot position. This ensures high accuracy and robustness, which is particularly important in high-mobility environments where signal conditions can be highly dynamic and challenging. The simulation results and analysis reveal that the proposed scheme demonstrates exceptional synchronization performance while maintaining low computational complexity, making it a promising option for high-speed or even ultra-high-speed mobile communication scenarios.

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Frame Synchronization Algorithm Based on Cyclic Prefix and Signal Sparsity in Delay-Doppler Domain for OTFS System

  • 会议论文

  • 发表日期：

    2026年

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  • Haiyan Yang,
  • Junsheng Zhuo,
  • Mingjun Zhang,
  • Jianfei Tong,
  • Heng Liu,
  • Zheng Ma

摘要

This paper presents a frame synchronization algorithm for the orthogonal time frequency and space (OTFS) system, utilizing cyclic prefix (CP) auto-correlation and signal sparsity in the delay-Doppler (DD) domain. The synchronization algorithm comprises two steps. Initially, this algorithm employs CP auto-correlation for the raw synchronization. This initial step is crucial as it significantly reduces the search space and computation for the subsequent synchronization step, thereby improving efficiency. Following this, the fine synchronization is achieved by leveraging the sparsity feature of the received signal in the DD domain as well as the single pilot position. This ensures high accuracy and robustness, which is particularly important in high-mobility environments where signal conditions can be highly dynamic and challenging. The simulation results and analysis reveal that the proposed scheme demonstrates exceptional synchronization performance while maintaining low computational complexity, making it a promising option for high-speed or even ultra-high-speed mobile communication scenarios.