Spatial Diversity and Multiplexing Effects on Uplink Multi-hop LTE-Advanced.

Document Type : Research Studies

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Communication Engineering Dept., Faculty of Engineering, Mansoura University, Egypt

Abstract

Multi-hop Relay networks are proposed to fulfill the demanding coverage and capacity requirements in both uplink and downlink for current applications in a cost efficient way.  It can be used in IMT-Advanced technologies such as 3GPP LTE-Advanced. Spatial Diversity (SD) and Multiplexing (SM) have been adopted to improve the Signal to interference Noise Ratio (SINR) and spectrum efficiency in wireless networks. The objective of this paper is to evaluate the performance of Spatial Diversity and Multiplexing based on Adaptive modulation and coding (AMC) schemes in Uplink LTE-A. The average throughput, Throughput gain, and Mean File Transfer Time (MFTT) are considered as performance measures. The best Relay Station (RS) location in the cell was also estimated in order to improve LTE-A Uplink performance. The study takes into consideration the impact of Asymmetry between multi-hop links, the effect of different arrival rates from random positions of UEs in the cell. Resource blocks scheduling algorithm is used for more efficient use of resource blocks (RBs). Simulation results show effective improvement in uplink network performance by Combining Spatial Diversity and Multiplexing in 2x4MIMO system with RS at 50% of cell radius towards cell edge.

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