双频调制引入循环平稳的多用户信道盲估计

针对多用户系统提出了一种新颖的盲辨识方法。它利用了调制在循环频率域引入两个特别的循环谱，根据各个用户的循环域的支撑不同，可以分离出各个用户的两个循环统计量。最后利用循环谱分解和子空间方法，可以辨识出不同的用户在不同的传感器上的信道。文中还给出了信道可辨识性的条件和证明，提出了辨识算法，并对算法进行了模拟。

Blind Multiuser Channel Estimation Based on Modulation-Induced Two-Cycle Cyclostationarity

A novel approach is presented for the multiuser channel identification. The approach uses the modulation-induced cyclostationarity on two cyclic frequencies and can identify individual channels of different users. By using the factorization of the cyclic spectrum and the subspace method the blind estimation of the channel can be achieved. The approach is rather simple and suitable for the multiuser uplink. The identifiability condition and its proof are also concluded. Finally simulation of identification algorithm is given.