Tracking algorithm of BPSK signal in low bit SNR and high dynamic scenarios  

作　　者：王鹏 陈国瑛 

机构地区：[1]Beijing Institute of Electronic System Engineering [2]the Second Academy of China Aerospace Science and Industry Corporation

出　　处：《Journal of Beijing Institute of Technology》2015年第1期118-127,共10页北京理工大学学报（英文版）

基　　金：Supported by the National High Technology Research and Development Program of China(863 Program)(2011AA1569)

摘　　要：A new tracking algorithm is proposed aiming at the tracking problem in low bit signal-to- noise ratio （i. e. , Eb/N0 ） scenarios, in which the bit clock regenerated by bit synchronization loop decides loop update moment. The double frequency processing and non-coherent accumulation tech- nologies are applied to eliminate the impact of data polarity inversion, and then long time accumula- tion improves the input signal-to-noise ratio of discriminator. The frequency locked loop and phase locked loop constitute a carrier loop in parallel, which can meet the high dynamic demands. The ef- fectiveness of this algorithm has been corroborated by theoretical analysis, simulation and measure- ments, and the new tracking algorithm has been used in an aerospace engineering project successfully.A new tracking algorithm is proposed aiming at the tracking problem in low bit signal-to- noise ratio （i. e. , Eb/N0 ） scenarios, in which the bit clock regenerated by bit synchronization loop decides loop update moment. The double frequency processing and non-coherent accumulation tech- nologies are applied to eliminate the impact of data polarity inversion, and then long time accumula- tion improves the input signal-to-noise ratio of discriminator. The frequency locked loop and phase locked loop constitute a carrier loop in parallel, which can meet the high dynamic demands. The ef- fectiveness of this algorithm has been corroborated by theoretical analysis, simulation and measure- ments, and the new tracking algorithm has been used in an aerospace engineering project successfully.

关 键 词：TRACKING double frequency processing NON-COHERENT low bit signal-to-noise ratio 

分 类 号：TN914.42[电子电信—通信与信息系统] TN973[电子电信—信息与通信工程]