Blind uplink space-time channel estimation for space-time coded multicarrier code division multiple access systems

The uplink of a space-time coded multicarrier code division multiple access (MS-CDMA) system equipped with a uniform linear array (ULA) at the base station is investigated. Transmission takes place over frequency-selective fading channels and the goal is to blindly estimate the space-time channels and the directions of arrival (DOA) for all active users in one macrocell. An auxiliary matrix including both uplink space-time channels and DOAs is constructed, on which the eigen decomposition is performed to acquire the DOAs for multiple users. Then, the singular value decomposition (SVD) is applied on the eigenvectors corresponding to the DOA of individual user to obtain a closed-form solution of the uplink space-time vector channel. Computer simulations demonstrate the effectiveness of the proposed scheme.

[1]  Zhigang Cao,et al.  Co-channel interference cancellation for space-time coded OFDM systems , 2003, IEEE Trans. Wirel. Commun..

[2]  Ramjee Prasad,et al.  Design and performance of multicarrier CDMA system in frequency-selective Rayleigh fading channels , 1999 .

[3]  Chew Yong Huat,et al.  Performance of space-time block coded system over frequency selective fading channel using semi-blind channel estimation technique , 2003, 2003 IEEE Wireless Communications and Networking, 2003. WCNC 2003..

[4]  Wei Sun,et al.  A subspace-based channel identification algorithm for forward link in space-time coded MC-CDMA systems , 2002, 2002 IEEE Wireless Communications and Networking Conference Record. WCNC 2002 (Cat. No.02TH8609).

[5]  Qinye Yin,et al.  Equivalently blind time-domain channel estimation for MC-CDMA system over frequency-selective fading channels in multiuser scenario , 2001, IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211).

[6]  Robert W. Newcomb,et al.  Estimating 2-D angles of arrival via two parallel linear arrays , 1989, International Conference on Acoustics, Speech, and Signal Processing,.