Akademik Veri Yönetim Sistemi
Tezin Türü: Yüksek Lisans
Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Mühendislik Fakültesi, Elektrik ve Elektronik Mühendisliği Bölümü, Türkiye
Tezin Onay Tarihi: 2013
Tezin Dili: İngilizce
Öğrenci: Halil Saygılı
Danışman: ALİ ÖZGÜR YILMAZ
Özet:In this thesis, multiple antenna transmission techniques like spatial multiplexing, spatial modulation and multiple active spatial modulation are compared in multipath fading channels. Maximum likelihood sequence estimation (MLSE) based on the Ungerboeck observation model is the optimal operation for intersymbol interference channels and applied on the mentioned multiple antenna transmission strategies. The performance analysis based on Monte Carlo simulations and comparison of the computational complexity of the studied receiver structures showed us that spatial modulation has the lowest complexity and it can be an alternative to classical spatial multiplexing systems for low spectral e ciencies. But performance of spatial modulation starts to deteriorate for higher spectral e ciencies. In this case, multiple active spatial modulation is still a low complexity alternative for spatial multiplexing. Delayed decision feedback sequence estimation (DDFSE) based on the Ungerboeck model which is a suboptimal reduced state detection algorithm is also applied to these multiple antenna techniques. The performance analysis based on Monte Carlo simulations reveals that error propagation in DDFSE exacerbates the performance di erence between spatial multiplexing and modulation.