【摘要】 为了提高AIS信号接收机的采样判决效率,针对卫星天线接收的船舶自动识别系统(Automatic Identification System,AIS)信号特点,提出了一种基于同步序列的AIS信号简化采样判决法——样值同步算法。算法利用24 bit同步位及8 bit开始标志位优先确定采样位置,进而对星载AIS信号进行采样判决,可大幅节省硬件资源,降低硬件复杂度。仿真结果表明,在相同条件下与全采样判决法相比,该简化算法能达到相同的正确率。更多还原

【Abstract】 In view of the signal characteristics of space-based AIS( Automatic Identification System),a simplified sample synchronization method of AIS signal based on synchronization sequence is proposed for improving the efficiency of AIS receiver. This method uses 24-bit sync bit and 8-bit leading flag bit to determine the sample position,and then perform the sample decision for spacebased AIS signal,which can save hardware resources and reduce hardware complexity significantly. The simulation results show that this simplified algorithm can obtain the same validity under the same condition compared with the full sample decision method.更多还原