| 摘要: |
| 在分析传统侦收船舶自动识别系统（AIS）信号严重依赖全球定位系统（GPS）不足的基础上，提出了一种改进的侦收算法，利用同步序列的实时相关运算实现AIS信号的检测并达到位同步，进而完成解调侦收。改进后的算法不再需要GPS系统的辅助，简化了设计降低了成本，在13 dB的信噪比下误包率可以达到5%以下。 |
| 关键词: 船舶自动识别系统 信号检测 位同步 解调侦收 |
| DOI： |
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| An improved signal reconnaissance algorithm of satellite-borne AIS |
| RAO Kun |
| () |
| Abstract: |
| Through analyzing the disadvantage of traditional automatic identification system(AIS) signal reconnaissance depending heavily on global positioning system(GPS),this paper presents an improved algorithm which realizes AIS signal detection and bit synchronization according to the correlation result of synchronisation sequence in real time,and demodulates AIS signal successively. The improved algorithm doesn′t need to use GPS,resulting in a more simplified design and a lower cost. The package error rate(PER) is less than 5% at the signal-to-noise ratio of 13 dB. |
| Key words: automatic identification system signal detection bit synchronization demodulation reconnaissance |
《电讯技术》编辑部 