WCDMA and MC-CDMA for UMTS/UTRA
WCDMA is the Physical Layer Standard for 3G Mobile Communication systems. The course is focused on principles, technology system architectures, evolution of standards, main applications and expected future trends in the field. The traditional technologies based on power controlled CDMA with RAKE as well as more advanced technologies based on Multiuser Detection, Adaptive Antennas, MC-CDMA and Space-Time coding are discussed. WCDMA applications in personal, indoor and 3G terrestrial and satellite mobile radio systems will be presented. A detailed discussion of UTRA/UMTS/WCDMA FDD and TDD mode will be presented.
|Course Duration:||48 Hours|
DS systems, CDMA System Examples, Codes: Spreading Codes/ML Sequences, Gold Codes, JPL codes, Kronecker Sequences, Orthogonal Walsh Codes, Modified RS Sequences, Correlation Functions and Power Spectra, Optimal PN Sequences.
CODE ACQUISITION & TRACKING
Serial Search, Single Dwell/Double Dwell Strategies, Tools for Performance Analysis (Average acquisition time and its variance, acquisition time distribution function), Threshold Setting (CFAR algorithms, instantaneous threshold setting), Modified Sweep Strategies, Acquisition with Code Doppler, Specific Problems in CDMA Network and Rake Receiver Including Two- Dimensional (Delay-Space) Code Acquisition. Code Tracking Loops: Delay Lock Loops, different versions of Tau Dither Loops, Discrete Tracking Loops, Performance Comparison, Synchronization over Fading Dispersive Channels, Joint Estimation of PN Code Delay and Multipath Using Extended Kalman Filter, Joint Delay and Doppler Shift Estimation.
Closed Loop Power Control, Adaptive Fuzzy Proportional Integral Power Control, Multicell CDMA with Power Control Error.
CDMA SYSTEM OVERVIEW
IS 95, B and C, Wideband WCDMA IS 665, CDMA2000, System and Channel Model, System Performance on the Capacity of Cellular CDMA Systems, Sectorization and Voice Activity Monitoring, Reverse Link Power Control in Multiple Cell Systems, Reverse Link Capacity for Multiple Cell CDMA, Multiple Cell Forward Link. Capacity with Power Allocation, Effects of Imperfect Power Control, Influence of Propagation Parameters on Cellular CDMA, Multipath Fading, Diversity Combining Techniques, Rake Receiver, Handoffs.
CDMA CELLULAR RADIO NETWORK DESIGN
Design Philosophy, Key Design Considerations, C/I And FER, Calculation Of Design Parameters In Uniform Cell-Size Scenario: Forward Link, Reverse Link, System Level Parameters, Calculation Of Design Parameters in Non-Uniform Cell Scenario: Transmit Power Of The Forward Link Channel and Reverse Link Channels.
CDMA NETWORK PLANNING, RESOURCE MANAGEMENT AND ACCESS CONTROL
Coverage and Capacity, Resource Management for Multimedia CDMA, Minimizing Total Transmit Power, Maximizing Throughput, Access Control of Data Integrated Voice/Data CDMA Systems, Access Control Based on Prediction and Practical Algorithms, CDMA Packet Radio Network, Adaptive CDMA Networks.
OPTIMAL MULTI-USER CDMA RECEIVERS IN GAUSSIAN CHANNELS
Optimal Receiver Structure, Minimum Probability of Error, Detectors: Linear Multi-User Detectors (decorrelators) for Synchronous and Asynchronous CDMA, Nonlinear Multi-User (multistage) Detectors, MMSE Detectors, Near - Far Resistance of Multi-User Detectors in Asynchronous Channels, Serial Multi-User Interference Cancellation Techniques, Capacity Improvements, Standards, Simulation Results for Different System Parameters.
MULTI-USER DETECTION IN FADING CHANNELS
Flat And Frequency Non-Selective Rayleigh Fading: ML Sequence Detection, Decorrelating Detector, Coherent Demodulation, Differentially Coherent Demodulation, Multipath Decorrelation, Coherent Detection with Maximum Ratio Combining, Differential Coherent Detection with EGC, Joint Channel and Signal Parameter Estimation in Flat and Frequency Selective Fading: Optimal Multi-User Receiver, Decision Directed Multi-User Receiver, Differentially Coherent Decorrelating Receiver, Simulation Results.
CDMA NETWORK SENSITIVITY FUNCTION
Modeling of Implementation Imperfections, Network Sensitivity Function, Network Feasibility Function.
OFDM AND MC-CDMA
Timing and Frequency Synchronization, Intermodulation, Interference Suppression, Successive Interference Suppression, STBC MC-CDMA.
UTRA/UMTS/WCDMA FDD AND TDD MODE
Layer 1 Description (FDD and TDD Mode), Transport and Physical Channels, Multiplexing, Channel Coding and Interleaving, Spreading and Modulation, Radio Transmission and Reception, Physical Layer Procedures (Power Control, Cell Search, Random Access), UMTS Network Architecture.