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: 2017
Öğrenci: UMAY EZGİ DENİZ
Danışman: ÇAĞATAY CANDAN
Özet:The joint precoder/ decoder design in the multiuser downlink multi-input-multioutput (MU-MIMO) communication problem is investigated under three different scenarios. In the first scenario, the same information denoted as common information is delivered to all users, i.e. multicasting scenario. In the second scenario, the base station (BS) transmits independent information bits (private information) to the users, i.e. the conventional communication scenario. Finally, in the third scenario, the BS concurrently delivers both common and private information to the users. The main goal of this thesis is to study precoder/ decoder design for these scenarios. The precoder/ decoder pairs are optimized according to the maximum-minimum fairness (MMF), quality of service (QoS) and minimum total mean square error (TMSE) criteria. In the MMF and QoS problem settings, the optimization problem is non-convex and accomplished by semidefinite relaxation method or another technique known as exact penalty approach. The TMSE minimization is accomplished by sequential design of optimal linear estimator (Wiener filter) at the transmitter and receiver. Simulations with respect to various system parameters such as the number of transmitter and receiver antennas, the number of users and given transmitted power are performed in order to observe the characterization of performance metrics like minimummean SNR/SINR, BER or MSE etc. Moreover, the computation times of the v algorithms are also compared in order to evaluate their applicability in practice.