Abstract
In this paper, the issue of time synchronization between the base station and user equipment in a fifth-generation cellular communication system is considered. In order to reduce the complexity of the current method of estimating the start symbol offset, a modification of the algorithm is proposed, in which the cross-correlation is computed in parallel for each DMRS (Demodulation Reference Signal) symbol. Furthermore, calculating the cross-correlation for each DMRS symbol allows for the development of a new method of estimating the sampling frequency offset based on the time interval estimation between two consecutive DMRS signals at the output of the matched filter. It is demonstrated that using a parabolic interpolation of the local regions around the correlation peak at the matched filter outputs yields an accurate estimation of the temporal distance between the received DMRS signals. Numerical simulation results show that the suggested technique can estimate the sampling frequency offset with an accuracy of less than 1 ppm over the entire range of signal-to-noise ratio values.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.