Multiuser Detection
Blind separation of synchronous co-channel digital signals using anantenna array. I. Algorithms
IEEE Transactions on Signal Processing
Subspace Direction Finding With an Auxiliary-Vector Basis
IEEE Transactions on Signal Processing
Blind digital signal separation using successive interferencecancellation iterative least squares
IEEE Transactions on Signal Processing
An iterative algorithm for the computation of the MVDR filter
IEEE Transactions on Signal Processing
Eavesdropping in the synchronous CDMA channel: an EM-based approach
IEEE Transactions on Signal Processing
Blind multiuser detection: a subspace approach
IEEE Transactions on Information Theory
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We consider the problem of extraction on wireless direct-sequence code-division multiple-access (DS-CDMA) systems. We develop an iterative least-squares-type algorithm that extracts the information symbols of the multiple concurrent DS-CDMA users and assumes no knowledge of either the signature waveforms or the channel state. The proposed scheme utilizes a novel initialization step that is based on auxiliary-vector (AV) subspace decomposition. Simulation studies evaluate the performance of the proposed extraction procedure in realistic data limited environments and show that, for observation records of sufficient length, information data extraction can be achieved with probability of error rather close to what may be attained with known signatures and channel state.