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A Low Complexity RLS-PASTd Algorithm for Blind Multiuser Detection in Dispersive CDMA Channels

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3 Author(s)
Zi-Zhe Ding ; Dept. of Autom., Tsinghua Univ., Beijing ; Xian-Da Zhang ; Xiao-Long Zhu

For joint blind channel estimation and multiuser detection in direct-sequence code division multiple access (DS-CDMA) systems, a combined scheme is proposed, which couples the recursive least-squares (RLS) adaptations and the PASTd subspace tracking algorithm. A major advantage of the RLS-PASTd algorithm is that it admits an adaptive implementation with low computational complexity instead of singular value decomposition. Simulation results demonstrate the fast tracking capability and high steady-state estimation accuracy of the proposed algorithm in both the time-invariant and time-variant environments

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Wireless Communications, IEEE Transactions on  (Volume:6 ,  Issue: 4 )