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In this paper, we proposed the addition of 2 new bits in Downlink Control Information (DCI) format 2D used for Transmission Mode 10 in 3GPP LTE-A specification. This New Downlink Control Information Design with two new bits extends the Downlink Demodulation Reference Signal (DMRS) so that the Physical Downlink Shared Channel (PDSCH) shall be processed and mapped to Resource Elements (RE) mapping and...
In this paper, we propose a correlation method for optimal user pairing in downlink Multi User-Multiple Input Multiple Output (MU-MIMO). The method involves selection of the first and best user from all the K users, and then the second user, chosen to be orthogonal based on the correlation between two users. The MU-MIMO performance is optimized under a particular fairness criterion. The simulation...
This paper investigates downlink MU-MIMO for further improvement using an analytical method. The method shows that the potential benefit for MU-MIMO with increased feedback is strongly dependant to channel frequency selectivity. The introduced codebook with 8- and 12-bt PMI cases are shown to exploit the structure to significantly lower the complexity of PMI searches. Link level simulations confirm...
This paper represents recent research on Long Term Evolution-Advanced (LTE-A) technology which is a mobile communication system supported by Multiple-Input Multiple-Output (MIMO) antenna transmission based on Downlink transmission, whereby User Equipments (UEs) are scheduled for packet transmission via information such as channel quality indicator reports, rank indication and precoding matrices. The...
This is a recent research on Space Division Multiple Access-Orthogonal Frequency Division Multiplexing (SDMA-OFDM) based on the biological technique of Genetic Algorithm (GA) which is reminiscent of the rules of evolution and survival where a group of fitters' individuals in a population will survive more and more using in the wireless communication in the Multi-User Detection. The goal of this research...
This is a recent research on Space-Division-Multiple-Access-Orthogonal frequency Division Multiplexing (SDMA-OFDM) for channel estimation based on iterative joint channel estimation and a new Genetic Algorithm (GA). Assisted iterative joint channel estimation and Multi-User Detection (MUD) is the most recent approach for MTMO SDMA-OFDM systems and GA-aided MUD techniques for providing the best capacity...
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