摘要
根据运行在Ka频段的第五代海事卫星系统(简称海五)反向信号的总体特征,提出利用共轭对称序列相关法检测方案进行反向信号相关检测。针对反向信号解调,提出采用基于FFT的频偏估计算法进行频偏纠正,根据第一个导频符号及调制样式确定相偏纠正,采用符号同步和载波同步两个环路进行信号同步,实现反向信号解调的目的。实验结果表明,所提方法相位估计误差较小,最佳采样点偏移小于半个符号时对解调结果不产生显著影响。这对了解和掌握全球最新一代卫星通信技术的发展趋势,促进我国Ka频段卫星通信业务开展,安全应急通信发展,推动我国海洋战略发展进步具有现实意义。
According to the overall characteristics of the reverse signal of the fifth generation maritime satellite system(referred as Hai V)operating in the Ka band,the conjugate symmetric sequence correlation detection scheme was proposed to detect the reverse signal,and the frequency offset estimation algorithm based on FFT was proposed to correct the frequency offset,and the phase offset correction was determined according to the first pilot symbol and modulation style,and the two loops of symbol synchronization and carrier synchronization were used to synchronize the signal to achieve the purpose of reverse signal demodulation.Experimental results show that the phase estimation error of the proposed method is small,and the optimal sampling point offset is less than half a sign without significant effect on the demodulation results.This is of practical significance for understanding and mastering the development trend of the world’s latest generation of satellite communication technology,promoting the development of Ka-band satellite communication services,the development of safe emergency communications,and the deve-lopment and progress of marine strategy.
作者
郭微光
冯朔
李黛云
GUO Wei-guang;FENG Shuo;LI Dai-yun(PLA Unit 91001,Beijing 100161,China;No.54 Research Institute,China Electronics Technology Group Corporation Limited,Shijiazhuang 050081,China)
出处
《计算机工程与设计》
北大核心
2023年第6期1670-1677,共8页
Computer Engineering and Design
关键词
海事五代卫星
卫星通信
反向信号
信号检测
信号解调
海洋战略发展
应急通信
the fifth generation of maritime satellites
satellite communication
reverse signal
signal detection
signal demodulation
marine strategic development
emergency communication
