Performance Analysis Of Transmission Modes In LTE
Author: Hasib Md Abid Bin Farid, Adil M. J. Sadik, and Ibrahim K. Razu, Abduhu R. Hasin, Mohammad T. Kawser,
Abstruct: Multiple antenna technology, commonly referred to as MIMO, is an emerging innovation in wireless and radio communication networks. The Long Term Evolution (LTE) standard for mobile broadband incorporates this technique within the transmission modes defined in Release 8. MIMO offers several advantages, including improved coverage, enhanced spectral efficiency, reduced power consumption, and increased peak throughput. In the LTE downlink, the PDSCH channel supports various MIMO techniques such as transmit diversity, spatial multiplexing, and beamforming, with antenna configurations like 2×2, 2×4, or 4×4 at both the transmitter and receiver. However, the performance of these transmission modes varies depending on factors such as multipath channel conditions, user equipment (UE) speed, and the UE’s position within a cell. Therefore, it is essential to analyze their performance while considering these aspects. This paper presents a performance evaluation of the LTE downlink PDSCH transmission modes—single antenna, transmit diversity, and open-loop spatial multiplexing (OLSM)—based on the interpretation of simulation results.
Performance Comparison between Round Robin and Proportional Fair Scheduling Methods for LTE
Author:Â Mohammad T. Kawser, Hasib Md Abid Bin Farid, Abduhu R. Hasin, Adil M. J. Sadik, and Ibrahim K. Razu
Abstract: In Long Term Evolution (LTE) networks, the scheduler in the MAC layer of the eNodeB is responsible for allocating available radio resources among user equipment (UEs) in a cell by appropriately managing priority levels. The choice of scheduling method significantly influences both individual user throughput and overall cell throughput. Therefore, evaluating throughput under different scheduling scenarios prior to LTE deployment is essential for designing an effective scheduling algorithm at the eNodeB. This paper investigates throughput conditions for two widely used scheduling methods—Round Robin and Proportional Fair—to provide a comparative analysis of downlink performance. The evaluation is conducted for both SISO and transmit diversity configurations across various UE locations within a cell.