Matrix computations (3rd ed.)
QR factorization based blind channel identification withsecond-order statistics
IEEE Transactions on Signal Processing
IEEE Transactions on Signal Processing
Blind multiuser channel estimation in asynchronous CDMA systems
IEEE Transactions on Signal Processing
Performance analysis of minimum variance CDMA receivers
IEEE Transactions on Signal Processing
A maximum likelihood digital receiver using coordinate ascent andthe discrete wavelet transform
IEEE Transactions on Signal Processing
Blind multiuser detection: a subspace approach
IEEE Transactions on Information Theory
Blind adaptive multiuser detection
IEEE Transactions on Information Theory
Rake receiver for downlink CDMA systems using blind channel estimation technique
SIP '07 Proceedings of the Ninth IASTED International Conference on Signal and Image Processing
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The problems of blind timing acquisition and channel estimation for DS-CDMA signals in multipath fading channels are investigated. Using only the spreading code of the desired user, methods based on QR decompositions are proposed. These methods perform comparably or even better than subspace based methods with an order lower complexity. Furthermore, the methods exhibit significantly more robustness to channel order mismatch. Based on the acquired timing information, channel estimation algorithms are also developed which are competitive with the previously proposed subspace based channel estimation algorithms. In addition, a channel order estimation algorithm is proposed for the scenario where the order is unknown. Performance of the proposed algorithms is evaluated through simulation and comparison to asymptotic Cramér-Rao bounds.