Multiuser Detection
Wideband CDMA For Third Generation Mobile Communications: Universal Personal Communications
Wideband CDMA For Third Generation Mobile Communications: Universal Personal Communications
Pre-Compensation for Rayleigh Fading Channels in Time Division Duplex OFDM Systems
Wireless Personal Communications: An International Journal
IEEE Transactions on Signal Processing - Part II
Minimum BER block precoders for zero-forcing equalization
IEEE Transactions on Signal Processing
Minimum BER linear transceivers for MIMO channels via primal decomposition
IEEE Transactions on Signal Processing - Part I
Adaptive minimum-BER linear multiuser detection for DS-CDMA signalsin multipath channels
IEEE Transactions on Signal Processing
Transmitter-based inverse filters for reducing MAI and ISI in CDMA-TDD downlink
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
Multi-user detection for DS-CDMA communications
IEEE Communications Magazine
IEEE Journal on Selected Areas in Communications
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In order to reduce the complexity of the mobile receiver, we develop two prefilter models using a linear FIR prefilter for minimizing the probability of error in multi-user transmission scenario. We consider downlink transmission. In the first system model, we have a single common prefilter for all users at the base station transmitter and in the second system model, we consider an individual prefilter for each and every user. We assume complete knowledge of the channel at the base station. In order to fully utilize the knowledge available at the transmitter, the filter weights are computed, conditioned on the transmitted bit vector sequence. This also makes the computation of the prefilter coefficients linear in the number of users as opposed to the exponential complexity otherwise. Coefficients of FIR prefilter are computed by minimizing the conditional probability of error and the mean square error. To further improve the performance of the proposed models, we consider Maximum Ratio Transmission (MRT) beamforming at the base station for both the models. Simulation results illustrate the performance of the proposed system models.