CAJ | 학술논문

提出了基于特殊导频码的 OFDM 系统的盲帧同步算法。该算法不需要数据辅助，首先利用 FFT 窗跨界时产生的能量泄露实现了对符号定时参数的估计，然后对同步后的 OFDM 信号进行解调得到信息序列，最后利用3阶相关函数（ TCF ）对序列进行处理从而提取出同步码以实现帧同步。仿真结果表明，该算法在低信噪比下具有较好的同步能力和较高的同步精度。
제출료기우특수도빈마적 OFDM 계통적맹정동보산법。해산법불수요수거보조，수선이용 FFT 창과계시산생적능량설로실현료대부호정시삼수적고계，연후대동보후적 OFDM 신호진행해조득도신식서렬，최후이용3계상관함수（ TCF ）대서렬진행처리종이제취출동보마이실현정동보。방진결과표명，해산법재저신조비하구유교호적동보능력화교고적동보정도。
A blind frame synchronization algorithm for OFDM systems based on special pilot code is proposed in this paper. The algorithm does not need training data. Firstly, symbol synchronization is implemented by using the energy leak caused by striding FFT window. Secondly, the information serials are obtained by demodulating the synchronization OFDM signal. Finally, frame synchronization is implemented by collecting synchronization code from the information serials using triple correlation function. The simulation results show that the proposed algorithm has better synchronization probability and higher precision at low SNR.