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在非合作通信中,符号率估计和符号同步是实现数字调制信号正确解调的关键问题之一。针对这一问题,文中在分析现有符号率估计和符号同步算法优缺点的基础上,提出了一种新的基于Haar小波变换的数字调制信号符号率估计和符号同步算法。通过引入多同步参考点和同步位置修正技术,使得该算法具有更高的精度和抗噪声性能。数值仿真验证了该算法与传统算法相比的优越性。
In non-cooperative communication, symbol rate estimation and symbol synchronization are one of the key issues for the correct demodulation of digital modulated signals. In this paper, based on the analysis of the advantages and disadvantages of the existing symbol rate estimation and symbol synchronization algorithms, a new symbol rate estimation and symbol synchronization algorithm of digital modulation signal based on Haar wavelet transform is proposed. By introducing multi-sync reference point and synchronous position correction technology, the algorithm has higher accuracy and anti-noise performance. The numerical simulation verifies the superiority of the proposed algorithm over the traditional one.