Change search
ReferencesLink to record
Permanent link

Direct link
On The Adjacent Channel Interferencein Ultra Dense Deployment
KTH, School of Information and Communication Technology (ICT).
2013 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The giant ever increasing demand for higher data rates and better Quality of Service (QoS) is rapidly growing and operators’ main concern is to supportthe growth of mobile data traffic and address the users’ expectations whileat the same time keeping the costs of services reasonable [1], [2], [3]. This is more vital in residential and dense urban areas where the reception of themacro signal level becomes weak [4]. Therefore, the implementation of ultradense networks becomes a promising approach which is expected to providegood indoor coverage and higher capacity in residential areas. Nevertheless, the potential degradation of network performance due to severe interferenceoriginated from nearby networks should be deeply studied prior to full-scaleimplementation of ultra dense networks. The main concern of this thesiswork is to investigate the coexistence between two operators in Time DivisionDuplex (TDD) system which are using adjacent frequency channelsand implemented in the same geographical area. For this purpose, the systemlevel simulation based on Monte Carlo method is performed to revealthe impact of critical parameters including Adjacent Channel Interferencepower Ratio (ACIR), Uplink-Downlink synchronization between operators, Base-Stations positioning, and Internal walls existence on the system performance. Afterwards, the effect of densification on the previous findings isstudied. Results show that in downlink and uplink, approximately 30 dB and55 dB of ACIR is required, respectively, in order to eliminate the impactof adjacent channel interference. Furthermore, in uplink, synchronizationis necessary when base stations of operators are collocated. In downlink, however, synchronization and collocation is beneficial when signal quality ispoor. On the other hand, it is shown that densification is feasible providedbase stations employ adjustable transmission power model. Moreover, internalwalls can improve system performance due to attenuation of interferencesoriginated from surrounding cells.

Place, publisher, year, edition, pages
2013. , 70 p.
Trita-ICT-EX, 2013:244
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-137977OAI: diva2:680026
Available from: 2013-12-17 Created: 2013-12-17 Last updated: 2013-12-17Bibliographically approved

Open Access in DiVA

fulltext(3652 kB)324 downloads
File information
File name FULLTEXT01.pdfFile size 3652 kBChecksum SHA-512
Type fulltextMimetype application/pdf

By organisation
School of Information and Communication Technology (ICT)
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 324 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 390 hits
ReferencesLink to record
Permanent link

Direct link