Particle Filter-based Time Synchronization Compensation Method for 5G-R
Maintaining time synchronization of 5G-R,as the next generation high-speed railway time synchronization wireless communication system,is crucial for the safety of high-speed railway operation.Addressing the issue of inaccu-rate estimation of master-slave clock skew caused by the failure of the existing time synchronization methods to consider the influence of 5G-R fast time-varying channel,this paper proposed a particle filter-based method to compensate for 5G-R time synchronization.Firstly,a state transition equation was constructed for the phase and frequency shift of the mas-ter-slave clock.Secondly,the particle filter algorithm was used to obtain the optimal estimation of 5G-R clock skew.Fi-nally,the proposed method was used to compensate for the 5G-R time synchronization error.Through experimental simu-lation,the influence of doppler frequency shift on 5G-R time synchronization was analyzed and the quantiative analysis of time synchronization performance in different typical scenarios of high-speed railway was obtained.The experimental re-sults show that this method can effectively reduce the 5G-R wireless channel clock skew,with better stability and syn-chronization performance compared with other methods.
time synchronization5G-Rfast time-varyingparticle filtertime compensation
NETL
NSTL
万方数据
