Title :
Iterative MMSE group-blind multiuser detection for a coded CDMA system
Author :
Taheri, Mohammad Mahdi ; Nasiri-Kenari, Masoumeh
Author_Institution :
Dept. of Electr. Eng., Sharif Univ. of Technol., Tehran, Iran
Abstract :
In this paper, we consider the problem of multiuser detection in the presence of users with unknown signature codes for a synchronous coded CDMA system. Interference suppression for unknown users is done by projecting the received signal on the space of known users and then using eigenvalue decomposition and subspace techniques to derive a detector that cancels the known interference and successfully mitigates the unknown interference. Significant performance gains over detectors that ignore unknown users and treats them as noise is achieved.
Keywords :
code division multiple access; eigenvalues and eigenfunctions; interference suppression; iterative decoding; least mean squares methods; mobile radio; multiuser channels; signal detection; eigenvalue decomposition; group-blind multiuser detection; interference suppression; iterative MMSE detection; multiuser detection; performance; subspace techniques; synchronous coded CDMA system; unknown signature codes; Detectors; Gaussian noise; Interference cancellation; Interference suppression; Iterative methods; Matched filters; Multiaccess communication; Multiuser detection; Null space; Space technology;
Conference_Titel :
Wireless Communications and Networking Conference, 2002. WCNC2002. 2002 IEEE
Print_ISBN :
0-7803-7376-6
DOI :
10.1109/WCNC.2002.993546
