短码直接序列扩频CDMA多用户盲同步

Blind Synchronization of Short-code DS-CDMA Signals in Multi-user System

通过研究信号自相关矩阵特征值的特性,提出一种利用信号自相关矩阵行列式作为检测量的短码扩频DS-CDMA多用户同步算法。该算法只要求已知信号的扩频周期,对信号其他参数要求较低,实现了盲同步,仿真结果显示了该算法的有效性。与文献算法相比该算法更稳健,适应范围更广。

The problem of short-code DS-CDMA multi-user signals blind synchronization is studied in this paper. A new synchronization method is proposed by eigenvalue-analysis of the correlation,and the determinant of correlation is used as the synchronization criterion. In the new algorithm only the symbol period is needed,and all other signal parameters are unknown. Blind synchronization is realized in the algorithm. Some simulations are accomplished,and proved the efficiency of the algorithm. Comparing with the algorithm in reference,our algorithm much more dovish and broader used.