【摘要】 针对AIS混合信号的混合位置估计问题,改进了传统双窗检测法。混合信号混合部位和未混合部位在幅度和频率上存在明显差异,通过混合部分与未混合部分到达窗内的能量比值来估计重叠段与未重叠段的始末位置,对传统估计信号起始位置的判决函数进行了改进,估计精度更高。仿真表明,相较于传统双窗检测法,本文能够准确估计出混合信号的重叠始末位置。更多还原

【Abstract】 Aiming at the mixed position estimation problem of AIS mixed signals,this paper improves the traditional double-window detection algorithm.This improvement is implemented due to the significant difference in amplitude and frequency between the mixed-part and the unmixed-part of the mixed signals.In order to estimate the demarcation point between the overlapping segment and the non-overlapping segment,the method considers the ratio of the signal energy of the mixed signals reaching the window.The modified decision function makes the estimation accuracy better than traditional one.At last,the simulation is carried out base the novel method.The results show it can accurately estimate the overlapping start and end positions of the mixed signals comparing with the traditional double-window detection method.更多还原