Distributed Node Signal Design and Baseband Processing Algorithm

Wireless high-precision time synchronization between distributed nodes is the basis of autonomous application of nodes. In this paper, the signal transmission mode between nodes and the baseband processing algorithm of receivers are designed. On the basis of dual one-way ranging measurement and signal design system with semi-data-free modulation, the signal is divided into pilot branch without information and data branch with information. In the aspect of signal acquisition, coherent joint acquisition algorithm is used, and in the aspect of signal tracking, fusion algorithm is used to track code and carrier phase. Finally, the detection probability of the receiver and the mean square deviation of tracking error are simulated to verify the superiority of the coherent joint acquisition algorithm and the fusion tracking algorithm.