Timing estimation is the most crucial part of the modulation classification and demodulation of burst signals. The traditional methods in classical cooperative communication fail to provide satisfying accuracy in non-cooperative communication. A novel timing estimation method was proposed in this study, which involves a carefully designed optimisation function constituted by piecewise over code period. Moreover, a closed-form analytical solution of the proposed optimisation problem has been provided, which significantly increases the estimation performance with affordable complexity. In detail, the proposed method demonstrates almost five times higher accuracy than the traditional methods in the low signal-to-noise ratio (SNR) scenario, while approaches the modified Cramer–Rao bound in the high SNR scenario.

中文翻译：

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非合作通信中突发信号的前馈时序估计

时序估计是突发信号的调制分类和解调中最关键的部分。经典合作通信中的传统方法无法在非合作通信中提供令人满意的准确性。在这项研究中提出了一种新颖的时序估计方法，该方法涉及经过精心设计的由代码周期内的分段组成的优化函数。而且，已经提供了所提出的优化问题的封闭形式的解析解，其以可承受的复杂性显着提高了估计性能。详细地说，在低信噪比（SNR）情况下，所提出的方法显示出比传统方法高出近五倍的精度，而在高SNR情况下，则接近改进的Cramer-Rao界限。