Power Control in DS-CDMA Forward Linkin Mobile Channels
| dc.contributor.author | Aghajamaliaval, Peyman | |
| dc.date.accessioned | 2012-12-11T09:16:36Z | |
| dc.date.available | 2012-12-11T09:16:36Z | |
| dc.date.issued | 2011 | |
| dc.description | Master of Science in Electrical and Electronic Engineering. Thesis (M.S.)--Eastern Mediterranean University, Faculty of Engineering, Dept. of Electrical and Electronic Engineering, 2011. Supervisor: Assoc. Prof. Dr. Aykut Hocanın. | en_US |
| dc.description.abstract | ABSTRACT: In this thesis, performance of Direct Sequence Code Division Multiple Access (DS-CDMA) in wireless cellular communication system is investigated using Closed Loop Power Control (CLPC).Power control is significant in a DS-CDMA system, which is to reduce Multiple Access Interference (MAI) and near-far problems. In CDMA, the entire mobile users share the same frequency band simultaneously. Hence, they all interfere with one another. The significance of CLPC is to maintain the received signal strength at the desired level. The desired values are set by Base Station(BS) in order to keep the Bit-Error-Rate(BER)at anacceptable level with minimum possible transmission power.System performance is demonstrated with BER comparisons. It is shown that CLPC optimizes transmission powersand improves the capacity of the system. The proposed power control scheme is based on estimated signal strengths. The performance of CLPC algorithm and the DS-CDMA system is examined in AWGN and fading channels. The simulations are implemented on MATLABsoftware environment. Keywords: Wireless cellular communication systems, DS-CDMA, Closed Loop Power Control. …………………………………………………………………………………………………………………………………………………………………………………………………………………… ÖZ: Bu tezde, kablosuz hucresel haberleşme sistemi olan Doğrudan Dizili Kod Bolmeli Coklu Erişim (DD-KBÇE) başarımı Kapalı Cevrim Guc Denetimi (KÇGD) kullanılarak incelenmiştir. Güç denetimi Çoklu Eerişim Girişimi (ÇEG) ve Yakın- Uzak sorunlarını azaltmak için DD-KBÇE sistemlerinde DD-KBÇE kullanılmaktadır. DD-KBÇE sistemlerinde tum mobil kullanıcılar aynı frekans bandını paylaşmaktadırlar. KÇGD denetiminin amacı alınan sinyal gucu dengesini sağlamaktır. İstenen sinyal gucu değerleri Yer İstasyonu (Yİ) tarafından en az Bit Hata Oranı (BHO) göz onune alınarak belirlenmektedir. Sistem başarımı BHO karşılaştırmaları kullanılarak incelenmiştir.KÇGD iletim güçlerini denetleyerek sistemin kapasitesini artırmaktadır. Önerilen güç denetim sistemi kestirilen sinyal güçlerine göre belirlenmektedir. KÇGD algoritması ve DD-KBÇE sisteminin başarımı AWGN ve sönümlemeli kanallarda incelenmiştir. Benzetimler MATLAB yazılımı kullanılarak gercekleştirilmektedir. Anahtar Kelimeler: Kablosuz hucresel haberleşme sistemleri, DD-KBÇE, Kapalı Devre Güç Denetimi. | en_US |
| dc.identifier.citation | Aghajamaliaval, Peyman. (2011). Power Control in DS-CDMA Forward Linkin Mobile Channels. Thesis (M.S.), Eastern Mediterranean University, Institute of Graduate Studies and Research, Dept. of Electrical and Electronic Engineering, Famagusta: North Cyprus. | en_US |
| dc.identifier.uri | https://hdl.handle.net/11129/195 | |
| dc.language.iso | en | |
| dc.publisher | Eastern Mediterranean University (EMU) | en_US |
| dc.relation.publicationcategory | Tez | |
| dc.subject | Electrical and Electronic Engineering | en_US |
| dc.subject | Wireless Communication - Mobile Communication Systems | en_US |
| dc.subject | Direct Sequence Code Division Multiple Access (DS-CDMA) - Power Control | en_US |
| dc.subject | Wireless Cellular Communication Systems - DS-CDMA - Closed Loop Power Control | en_US |
| dc.title | Power Control in DS-CDMA Forward Linkin Mobile Channels | en_US |
| dc.type | Thesis |
