AU  - Oladapo, Oladotun O.
AU  - Supervisor: Seral,Devrim
TI  - Performance evaluation of long term evolution downlink-time division duplexing and frequency division duplexing
PY  - 2012///
CY  - Nicosia
PB  - Cyprus International University
KW  - Performance evaluation of long term evolution downlink-time division duplexing and frequency division duplexing
N1  - Includes references; 1; CHAPTER 1; 1; INTRODUCTION; 3; Targets and Requirements for LTE; 4; LTE Performance and Features; 5; LTE Basic Concepts; 6; Problems Statements; 6; Aims of Thesıs; 7; Thesis Organization; 8; OVERVIEW OF LONG TERM EVOLUTION; 10; LTE Network Architecture; 11; Functional Description of LTE Network; 11; Evolved Universal Terrestial Access Network (E-UTRAN); 12; Evolved Packet Core; 15; LTE Physical Layer; 16; Orthogonal Frequency Division Multiplexing(OFDM); 18; Cyclic Prefix; 18; Fast Fourier Transform(FFT); 19; Orthogonal Frequency Division Multiple Access(OFDMA); 21; Frame Structure; 21; Type-1 Frame Structure; 22; Type-2 Frame Structure; 24; TDD-FDD Duplex Transmission Modes; 24; FDD; 24; TDD; 25; TDD/FDD Frequency bands; 27; TDD versus FDD; 27; Physical Layer Downlink; 28; Slot Structure and Physical Resources Elements; 28; Resources grid; 29; Resource blocks; 31; Modulation; 32; Physical Channels; 34; Downlink Channel Processing; 37; Physical Signal; 37; References Signal; 39; Synchronozition Signal; 40; Download Multiple Antenna Transmission Modes; 42; Downlink Data Transmission; 42; Downlink Radio Procedure; 45; PROPAGATİON CHANNEL AND MODELS; 45; Propagation Channel; 47; Standard Channel Models; 47; SISO and SIMO Models; 48; ITU Channel Model; 49; Extended ITU Channel Models; 50; MIMO Channel Models; 51; ITU Models with Spatial Correlation; 52; Spatial Channel Model (SCM); 54; Winner Channel Model; 54; SIMULATION MODEL; 54; Simulaion Model; 57; Bi Error Rate; 58; Simulation Parameters; 59; RESULT AND DISCUSSIONS; 59; Scenario 1; 63; Scenario 2; 66; Scenario 3; 70; CONCLUSION AND FUTURE WORKS; 70; Conclusion; 73; Future Works; 74; REFERENCES
N2  - 'The Long Term Evolution (LTE) is the next step into the next generation mobile cellular communication with the main targets of increased data rates, reduced latency and increased spectral efficiency. LTE has proved itself to be more challenging than its other counterpart\'s technologies and it\'s often been referred to as the leap into a new generation technology - fourth Generation (4G). When compared to other existing 4G technologies like Worldwide Interoperability for Microwave Access (WiMAX), it has shown superiority in terms of high mobility, back-ward compatibility with older generations, and also it supports both paired and unpaired spectrum, these factors makes it a dominant network of choice amongst mobile operators today. Starting from this premise, it is vivid that all aspects of LTE topics are worth investigating for both the industrial and academic communities.  This work evaluates the performance of the paired used for Frequency Division Duplex (FDD) and unpaired used for Time Division Duplex (TDD) spectrum in LTE in terms of mobility, an important factor to consider in mobile cellular networks. This is when a mobile user is moving while active; the user\'s velocity causes a doppler effect, a phase shift in the frequency of the signal transmitted along each signal path which leads to fading. This work characterizes users\' mobility speed based on real-life scenarios average 5 km/h for pedestrian, average 70 km/h for mobile users on vehicle speed and average of 300 km/h for mobile users on high speed train. It has compared the TDD and FDD performance in terms of bit error rate (BER) with respect to signal noise ratios (SNR), a fundamental parameter to access the quality of digital transmission, considering different modulation schemes across different fading channels.   Keywords: LTE, 4G, WiMAX, FDD, TDD, SNR, BER'
ER  -