On Limits of Wireless Communications in a Fading Environment when UsingMultiple Antennas
Wireless Personal Communications: An International Journal
Multimode precoding for MIMO wireless systems
IEEE Transactions on Signal Processing - Part I
Multimode antenna selection for spatial multiplexing systems with linear receivers
IEEE Transactions on Signal Processing - Part II
Blind PARAFAC receivers for DS-CDMA systems
IEEE Transactions on Signal Processing
IEEE Transactions on Signal Processing
Constrained Tensor Modeling Approach to Blind Multiple-Antenna CDMA Schemes
IEEE Transactions on Signal Processing
Multiple antennas in cellular CDMA systems: transmission, detection, and spectral efficiency
IEEE Transactions on Wireless Communications
Layered space-time multiuser detection over wireless uplink systems
IEEE Transactions on Wireless Communications
Linear MIMO equalization for CDMA downlink signals with code reuse
IEEE Transactions on Wireless Communications
Space-time multiplexing for mimo multiuser downlink channels
IEEE Transactions on Wireless Communications
A simple transmit diversity technique for wireless communications
IEEE Journal on Selected Areas in Communications
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This paper considers the downlink of a multiple-input multiple-output (MIMO) code-division multiple-access (CDMA) system based on space-time spreading (STS) using multiuser/multicode transmission. A constrained tensor model is proposed for the STS transmitted signal. The new STS model generalizes existing ones by allowing multiuser spatial multiplexing with different code reuse/multiplexing patterns for each user. This model is parametrized by two allocation matrices with variable structure, which allow to control, respectively, the allocation of multiple data streams and spreading codes to the transmit antennas. A methodology is proposed to design these allocation matrices leading to finite sets of feasible STS schemes with guaranteed blind symbol recovery. The construction of feasible STS schemes for 2, 3 and 4 transmit antennas is presented as an illustration of this methodology. A blind receiver based on the alternating least squares algorithm is used for symbol recovery. The bit-error-rate performance of this receiver is tested and compared to some existing STS-based downlink transceivers.