中文摘要：

在一个多用户系统的盲目隧道鉴定的问题在这篇文章被考虑。为这个目的，一个盲目鉴定算法基于收到的信号的 conjugate cyclostationarity 被建议。新途径包含一个二阶段的鉴定过程。首先，在周期的领域的分离技术被用来分开秒顺序为每个用户的周期的统计。第二，一个 subspace 算法基于合理 subspace 理论被利用估计需要的隧道。理论分析和模拟结果证明这个算法对一个多用户系统合适。与另外的方法相比，算法甚至处于一种坏状况看好性能用户的数字什么时候大，差异条件是无法获得的。

英文摘要：

The problem of blind channel identification in a multiuser system is considered in this article. For this purpose, a blind identification algorithm is proposed based on the conjugate cyclostationarity of the received signal. The new approach contains a two-stage identification procedure. First, the separation technique in the cyclic domain is used to separate the second-order cyclic statistics for each user. Second, a subspace algorithm based on the rational subspace theory is exploited to estimate the desired channel. Theoretical analysis and simulation results show that this algorithm is suitable for a multiuser system. Compared with other methods, the algorithm shows good performance even in a bad situation when the number of users is large and the diversity condition is unavailable.