Efficient PBCH DMRS Sequence Detection for Fast Synchronization Process of 5G NR Systems

In this paper, an efficient physical broadcast channel (PBCH) demodulation reference signal (DMRS) sequence detection scheme for new radio (NR) systems is proposed. Unlike conventional communication systems, to complete synchronization process, PBCH DMRS sequence detection, which has one-to-one mapping with 3 least significant bits (LSBs) of synchronization signal block (SSB) index, is essential procedure. In order to detect PBCH DMRS sequence efficiently, we propose the maximum-likelihood based detection scheme. We also provide the mean synchronization time (MST) based on Markov chain model analysis. Simulation results show that the proposed scheme is outstanding for the conventional scheme in terms of detection probability and MST.