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一般的系统同步要求以定时同步为先,然后进行频偏的估计,但大频差偏移往往影响到了系统的符号粗同步定时。针对大频差下信号难以捕获的问题,文中提出预设频差补偿的同步技术。理论分析和仿真结果表明,所采用的同步方法,可以比较准确地完成系统的符号定时同步。
The general system synchronization requires timing synchronization as the first, and then frequency offset estimation, but the large frequency offset offset often affects the system symbol coarse synchronization timing. Aiming at the problem that the signal is difficult to capture under large frequency difference, the paper presents the synchronization technology of preset frequency offset compensation. Theoretical analysis and simulation results show that the synchronization method adopted can accomplish the symbol timing synchronization of the system more accurately.