Computer & Electronics Engineering, Department of

 

Date of this Version

Fall 12-2-2010

Comments

A THESIS Presented to the Faculty of The Graduate College at the University of Nebraska In Partial Fulfillment of Requirements For the Degree of Master of Science, Major: Telecommunications Engineering, Under the Supervision of Professor Hamid.R Sharif-Kashani. Lincoln, Nebraska: December, 2010
Copyright 2010 Fahimeh Rezaei

Abstract

The 3rd Generation Partnership Project (3GPP) introduced Long Term Evolution (LTE) as the 3rd generation of mobile communication standards. LTE Release 8 describes a mobile communication standard which supports up to 300 Mbps of data transmission in downlink using the OFDM scheme as well as up to 75 Mbps throughput for uplink using the SC-FDMA modulation. In this thesis, an in-depth study of LTE performance based on Release 8 is conducted for uplink and downlink under different scenarios. The main objective of this study is to investigate a comprehensive analysis of physical layer throughput of LTE Release8 based on standard parameters for different channel bandwidths, duplex schemes, antenna diversity and other scenarios. Our study of the FDD operation mode shows that the maximum throughput for downlink data is 299.122 by using 4 antenna ports with the least possible control overhead (one OFDM symbol assigned to PDCCH), 64-QAM data modulation scheme, the maximum code rate (0.92), and the maximum channel bandwidth (20 MHz). This throughput result is based on PDSCH that is used for data transmission only and does not include control information (PDCCH, PHICH, and PCFICH), broadcast channel (PBCH), reference signals, and Synchronization Signals (P-SS and S-SS). Our study also shows that the maximum uplink throughput for the FDD operation is 71.97 Mbps excluding control channel information (PUCCH), and reference signals (demodulation reference signals and sounding reference signal). This maximum throughput result is based on assuming 64-QAM data modulation, maximum bandwidth (20 MHz), and 0.85 code rate.

This study also presents other throughput results based on different parameters. Overall, this thesis provides a comprehensive investigation of the LTE performance analysis based on detailed physical layer parameters to fill the existing gap in current literature in performance study of LTE.