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Title Simulation and Performance evaluation of co-existing GSM and UMTS systems
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Publication Date
Discipline/Department Mathematics and Natural Sciences
University/Publisher University of Gävle
Abstract   Mobile users need more capacity and higher velocity to work with new data applications. In  order to satisfy these requirements, mobile systems of third generation were created and they  are established every day in more places. Consequently second and third generation of system  have to coexist.  In this paper is presented a study about the co-existence between GSM and UMTS, the most  popular systems in Europe. 900MHz is the frequency chosen to work with both systems, due to  this low frequency allows: less path loss and more coverage, than 2100MHz the usual  frequency for UMTS system.   The situation evaluated is focused on introducing a UMTS carrier in a GSM operator, with the  aim to determine the advantages and cons produced in the mobiles with this change. Two  cases are distinguished: coordinated operation, GSM and UMTS900 in the same operator and  un-coordinated operation, UMTS900 respect to other GSM operator. Users under study belong  to both modified operator and a next GSM operator. Power control was programmed in both  systems.  It was determined how affect the interferences in system capacity of the operators and which  is the guard band necessary to protect the system. Spectral efficiency (user/cluster/MHz) in  the case GSM and UMTS900 in same band is twice as much as in a GSM operator. The  separation between operators is set in 300KHz.But is important to know that UMTS carriers do  not cause damage in others operators because is located in the middle of GSM carriers. The  guard band fixed to protect each mobile in operator with shared spectrum is not necessary.  The distance between carriers GSM and UMTS necessary is 2.4MHz while the width of one  UMTS carrier is 2.5MHz. 
Subjects/Keywords GSM; UMTS
Language en
Country of Publication se
Record ID oai:DiVA.org:hig-6801
Repository diva
Date Indexed 2017-06-16

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…List of Tables Table 2.1 General characteristics of GSM ..................................................................................... 6 Table 2.2 General characteristics of UMTS900…

…8 Table 3.1. Scenario’s description ................................................................................................ 12 Table 3.2 ACLR for GSM DL as victim being interfered by UMTS DL .......................................... 15…

…Table 3.3 ACLR for UMTS DL as victim being interfered by GSM DL .......................................... 15 Table 3.4 ACIR for UMTS DL as victim being interfered by GSM DL ......................................... 16 Table 3.5 ACLR for GSM DL as victim…

…being interfered by GSM DL ........................................... 16 Table A.1 Output RF modulation spectrum for a GSM 900 BTS ................................................. 39 Table A.2 ACLR regarding the different separation between carriers…

…systems. This makes it possible to make better use of frequencies for whatever service or technology. The goal of this study is to investigate the feasibility of allocating wireless radio transceivers from GSM and UMTS systems, in the same band of 900 MHz…

…assumption is to assure the co-existence between GSM a UMTS900, central theme of this thesis. It’s worth mentioning that if in the future a service wants to operate in this band, it has to be assured the least restrictive technical conditions to coexist. In…

…regulation affect in system mobiles? 1.3 Motivation The main reason for the interest to deploy UMTS in the GSM 900 band is the enormous growth in wireless data. As can be seen in the Telecommunications Market Report [4] of “The Swedish Post and…

…propagation loss. With the deployment of UMTS900 the users are going to obtain an improvement in their service associate to higher capacity, but also higher coverage. For this reason the purpose of this study is to investigate the co-existence between GSM and…

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