Impact and compensation of sample clock offset in L-CFDMA uplink

In order to solve the problem of sample clock synchronization in the localized code and frequency division multiple access (L-CFDMA) uplink, the system model of LCFDMA is constructed, the disturbance on the system model caused by multi-user sample clock offset (SCO) is analyzed, and the signal time shift, phase rotation, multiuser interference (MUI) and inter-carrier interference (ICI) motivated by multi-user SCO are analyzed quantitatively. On this basis, the compensation method of multi-user SCO is proposed by modifying the relevant metric function according to the multi-user SCO, approximating the ideal performance under no SCO. The results obtained in this paper are validated by computer simulation.