短波串行Link11信号解调关键技术研究

Research into Key Technologies of HF Serial Link11 Signal Demodulation

研究了短波串行Link11信号解调处理中的检测识别、同步估计以及信道均衡关键技术。基于信号帧结构特征,采用滑动相关功率谱估计算法完成了信号检测和同步估计,解决了大频偏情况下的信号检测和同步估计问题,设计分数阶判决反馈均衡器(DFE)分块均衡算法,实现了恶劣短波信道条件下信号高效快速均衡。

The key technologies of detection and identification,synchronization estimation and channel equalization in the demodulation processing of high frequency(HF)serial Link11 signal are studied.Based on the characteristics of signal frame structure,the sliding correlation power spectrum estimation algorithm is used to complete the signal detection and synchronization estimation,which solves the problem of signal detection and synchronization estimation in the case of large frequency offset.A block equalization algorithm of fractional order decision feedback equalization(DFE)is designed to achieve high efficiency and fast equalization of signals under severe HF channel conditions.