Inlämning av Examensarbete / Submission of Thesis

Tariku Temesgen Mehari MEE09:23, pp. 81. TEK/avd. för telekommunikationssystem, 2009.

The work

Författare / Author: Tariku Temesgen Mehari
Titel / Title: Frequency Hopping in LTE Uplink
Abstrakt Abstract:

In the 3GPP LTE, different radio resource management (RRM) techniques have been proposed in order to improve the uplink performance. Frequency hopping is one of the techniques that can be used to improve the uplink performance by providing frequency diversity and interference averaging. The hopping can be between subframes (inter-subframe) or within a subframe (intra-subframe). 3GPP specifies two types of frequency hopping for the LTE uplink, hopping based on explicit hopping information in the scheduling grant and sub-band based hopping according to cell-specific hopping and mirroring patterns.
In this master’s thesis, theoretical discussion on the frequency hopping schemes is carried out followed by dynamic simulations in order to evaluate the performance gain of frequency hopping. Based on the theoretical analysis, the second type of hopping is selected for detailed study. As a baseline for comparison, dynamic frequency domain scheduling with random frequency resource allocation has been used.
Single cell and multi-cell scenarios have been simulated with VoIP traffic model using user satisfaction as a performance metric. The simulation results show that frequency hopping improves the uplink performance by providing frequency diversity in the single cell scenario and both frequency diversity and interference averaging in the multi-cell scenario. The gains in using the hopping schemes were reflected as VoIP capacity (the number of satisfied users) improvement. In this study, the performance of the selected hopping schemes under different hopping parameters is also evaluated.

Ämnesord / Subject: Telekommunikation - Telecommunications
Signalbehandling - Signal Processing
Datavetenskap - Computer Science\Networks and Communications
Nyckelord / Keywords: Frequency Hopping, LTE Uplink, RRM, Scheduling

Publication info

Dokument id / Document id:
Program:/ Programme Electrical Engineering with emphasis on Telecommunication
Registreringsdatum / Date of registration: 05/09/2009
Uppsatstyp / Type of thesis: Masterarbete/Master's Thesis (120 credits)


Handledare / Supervisor: Prof. Dr.-Ing. Hans-Jürgen Zepernick
Examinator / Examiner: Prof. Dr.-Ing. Hans-Jürgen Zepernick
Organisation / Organisation: Blekinge Institute of Technology
Institution / School: TEK/avd. för telekommunikationssystem
S-371 41 Karlskrona
+46 455 38 50 00
I samarbete med / In co-operation with: Ericsson Research, Linköping
Anmärkningar / Comments:

Files & Access

Bifogad uppsats fil(er) / Files attached: frequency_hopping_in_lte_uplink.pdf (751 kB, öppnas i nytt fönster)