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CA(Carrier aggregation) is one of the most important techniques for LTE-Advanced system because of its capability to support wide bandwidth while achieving backward compatibility. In order to improve performance of control information transmission, cross-carrier scheduling is to be supported, i.e. control information on one CC (Component Carrier) can assign radio resource on another CC. Design of...
CA (Carrier aggregation) is one of the most important techniques for LTE-Advanced system because of its capability to support wide bandwidth while achieving backward compatibility. This paper focuses on enhancements of downlink control channel resource allocation for CA system in order to improve the performance of control information transmission in cross-carrier scheduling. A novel metric, named...
This paper investigates the downlink system level performance for Layer-3 (L3) and Layer-1 (L1) relays with orthogonal frequency division multiple access (OFDMA) used in LTE-Advanced. Various practical factors are taken into account in the evaluations such as the processing delay and upper-bound of the amplifier gain of the L1 relay, capacity limitation of the backhaul channels, and empty buffer status...
Abstract-This paper concerns the coordinated transmission among multiple remote antenna units (RAUs) and user equipments (UEs) in distributed antenna system (DAS), where instantaneous channel state information (CSI) feedback of multiple links is a big challenge. By exploring the inherent relationship among coordinated UEs, the dominant UEs grouping algorithm is proposed only using long-term CSI in...
This paper concerns the enhanced downlink transmit diversity scheme for EUTRA (Evolved Universal Terrestrial Radio Access) system. The performance of EUTRA downlink transmit diversity scheme, i.e. the combination of SFBC (Space-Frequency Block Codes) and FSTD (Frequency Switching Transmit Diversity), is tightly related to the subcarrier mapping method. In order to improve the performance of EUTRA...
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