改进型算法在LTE系统主同步中的应用

his paper describes a complete LTE system frame synchronization process, including the main Synchronization and Secondary Synchronization. The main synchronization using coarse synchronization and fine synchronization method. In the coarse synchronization process, it is possible to appropriately reduce the sampling frequency of the received sequence to reduce the size of the correlation operation of a sliding window, thereby reducing the complexity of the operation. Fine synchronization is the correlation calculation of the original sampling rate based on the coarse synchronization results. Moreover, in terms of performance, the main synchronization process using the maximum likelihood decision made by Massey algorithm, consider the impact of primary synchronization sequence surrounding data, introducing a weighted correction term based on the traditional correlation algorithm. Simulation results indicate that, in the white Gaussian noise channel, the main synchronization process using the Massey algorithm has a better capture rate of the main synchronization process than traditional algorithm, wih the maximum gain up to 3 ~ 4dB.