Physical Cell ID Detection Probability Using Synchronization Signals for NR Radio Interface

This paper presents the physical-layer cell identity (PCID) detection probability using precoding vector switching (PVS) transmit diversity and receive diversity for 5G new radio (NR). We use the sequences and multiplexing schemes of the primary synchronization signal (PSS) and secondary synchronization signal (SSS) based on the 3rd Generation Partnership Project (3GPP) release 15 specifications to detect the best PCID among the 1008 candidates. Link-level simulation results show that receive diversity up to four antennas is very effective in achieving highly correct detection probabilities of the PSS and SSS sequences, the combination of which provides the PCID, regardless of the propagation channel model. We also show that PVS transmit diversity with two antennas improves the PCID detection probability by approximately 5% - 10% in the high average received signal-to-noise power ratio (SNR) region when the PCID detection probability is greater than approximately 50% in the case of up to four receive antennas. Because further improvement in the PCID detection probability by increasing the number of transmit antennas to 4 antennas is small, it is shown that the application of PVS transmit diversity with two antennas is suitable for achieving high PCID detection probability in the NR radio interface. These conclusions are applicable to beamforming transmission for the PSS and SSS.