Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/71237
Title: On the performance improvement through the use of parallel interference cancellation in channel estimation for multipath CDMA systems
Authors: Tie, L.T.
Chew, Y.H.
Nallanathan, A. 
Keywords: Channel parameters estimation
Code-division multiple-access
Parallel interference cancellation
Issue Date: 2004
Source: Tie, L.T.,Chew, Y.H.,Nallanathan, A. (2004). On the performance improvement through the use of parallel interference cancellation in channel estimation for multipath CDMA systems. GLOBECOM - IEEE Global Telecommunications Conference 4 : 2339-2343. ScholarBank@NUS Repository.
Abstract: In this paper, a decoupled maximum likelihood (DEML) estimator is employed to estimate the multipath delays and channel coefficients of all users. This estimator starts with a training mode then reverts to a decision-directed mode. In the training mode, the initial values of multipath delays and channel coefficients of all users are estimated. These initial parameters are used for parallel multiuser interference cancellation. Once the multiuser interference is cancelled, the signal is fed back to the estimator for fine estimation of delays and channel coefficients of all users. These fine estimates are used for the nest symbol interval. This process continues in the decision-directed modes. The performance of channel estimation with interference cancellation has shown improvement under multipath environments considerably compared to the one without interference cancellation. Conclusively, the proposed scheme removes the inter-symbol interference (ISI) resulting from multipath propagation and obtains more accurate channel estimates for further data detection. Finally, analysis is done to justify the simulation results. © 2004 IEEE.
Source Title: GLOBECOM - IEEE Global Telecommunications Conference
URI: http://scholarbank.nus.edu.sg/handle/10635/71237
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