An Improved 5G New Radio Cell Search and Detection Algorithm
LIU Hui
LIU Zushen
XU Hu
Abstract：In 5G NR system,cell search is an indispensable process of time-frequency resource synchronous demodulation.The traditional synchronization algorithm has time-domain cross-correlation and piecewise correlation,the calculation is cumber-some,and the detection accuracy is reduced under high frequency deviation.Therefore,an improved PSS(Primary Synchronization Signal)detection algorithm is proposed in this paper.The local three groups of PSS sequences are superimposed correspondingly.According to the time-domain conjugate characteristics of PSS sequences,the conjugate correlation of the first half of the superim-posed sequences is taken,and the correlation results are segmented in frequency domain and then differentially accumulated.In ad-dition,in order to reduce the complexity of SSS(Secondary Synchronization Signal)detection,the traditional redundant cross-corre-lation is abandoned and Hadamard product operation is adopted.This algorithm reduces the amount of computation,reduces the in-fluence of frequency offset accumulation to a certain extent,and improves the anti-frequency offset ability of the system.In order to verify the performance of the algorithm,the proposed algorithm and the traditional algorithm are simulated and compared in AWGN(Additive White Gaussian Noise)channel.The simulation results show that the anti-frequency offset performance and detection effi-ciency of the proposed algorithm are significantly improved compared with the traditional algorithm.
Keywords：cell searchPSSdifferential accumulationSSSHadamard plot
Publication Date：2023-11-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 2493-2499,2504 )