摘要
针对现有星载AIS仿真系统并未建立在实际船舶分布情况基础上的问题,设计并实现了星载AIS仿真系统。该系统以实际船舶分布数据为基础,计算功率、频偏和时延等信号参数并仿真卫星接收到的AIS信号。使用不同的信号解调算法解调该仿真信号,与系统计算的该信号理论检测概率对比,对算法性能进行评估;与参数分布情况对比后可以进一步分析信号参数联合分布对解调算法性能的影响,为深入研究星载AIS系统信号解调算法提供了方法与依据。
Traditional space-based AIS simulation system is not established on the basis of actual ship distribution data. A new simulation system is designed and implemented.The system is based on actual ship distribution data to calculate power,frequency offset, delay and other signals’ parameters.AIS signal that satellite received is generated by the system.Various demodulation algorithms are applied to demodulate the simulated signal. And comparison is made against the theoretical detection probability to assess the algorithm’s performance.The impact of signals’ parameters joint distribution on algorithm can also be analyzed further.The system provides an effective method and basis for space-based AIS signal demodulation algorithm research.
出处
《无线电工程》
2014年第10期15-17,68,共4页
Radio Engineering
关键词
星载AIS系统
计算机仿真
算法分析
space-based AIS system
computer simulation
algorithm analysis
