Foreword	8
	Contents	10
	Chapter 1 Introduction	14
	Unknown	1
	1.1 Fourth Generation of Wireless Communication Systems	18
	1.2 State of the Art in the Field of IFDMA	20
	1.3 Goals of the Thesis	23
	1.4 Contents and Important Results	24
	Chapter 2 Fundamentals of Uplink OFDMA	28
	2.1 Introduction	28
	2.2 Orthogonal Frequency-Division Multiplexing	29
	2.2.1 Time and Frequency Domain Properties of an OFDM signal	29
	2.2.2 Discrete-Time Signal Processing in OFDM Transmitter	34
	2.2.3 Multipath Channel Model	37
	2.2.4 Discrete-Time Signal Processing in OFDM Receiver	37
	2.2.5 Technical Assumptions	41
	2.2.6 Mathematical Notation	42
	2.3 Uplink OFDMA and Its Extensions	44
	2.3.1 Uplink Communications	44
	2.3.2 OFDMA	44
	2.3.3 OFDMA-CDM	46
	2.3.4 IFDMA	49
	2.3.5 MSK-IFDMA and GOQPSK-IFDMA	50
	2.3.6 Spectral Properties	53
	2.3.7 M-Modification	54
	2.3.8 Remarks on IFDMA system design	56
	Chapter 3 Peak-to-Average Power Ratio	58
	3.1 Introduction	58
	3.2 PAPR definition	59
	3.2.1 PAPR Upper Bound for IFDMA and OFDMA	59
	3.2.2 PAPR Distribution	62
	3.3 Simulation Results	62
	3.3.1 Simulation Parameters	62
	3.3.2 Results and Discussions	63
	Chapter 4 Frequency Offset	70
	4.1 Introduction	70
	4.2 Simulation Model	72
	4.3 Performance Degradation due to Frequency Offset	75
	4.4 MAI Reduction	77
	4.5 Frequency Offset Estimation in the Frequency Domain	80
	4.6 Frequency Offset Estimation in the Time Domain	83
	4.7 Performance of the IFDMA Uplink System	85
	4.7.1 Simulation Parameters	85
	4.7.2 System Performance	86
	4.7.3 Comparison with Existing Techniques	89
	Chapter 5 Receiver and Optimum MMSE Equalization	92
	5.1 Introduction	92
	5.2 IFDMA/OFDMA-CDM Receiver	93
	5.2.1 Linear Equalizers	94
	5.2.2 Despreading	96
	5.3 Self-Interference in Independent Rayleigh Channel	97
	5.4 MMSE Equalizer for OFDM System with Windowing	101
	Chapter 6 IFDMA Uplink System Evaluation	108
	6.1 Introduction	108
	6.2 System Design	109
	6.2.1 System Parameters	109
	6.2.2 Nonlinear Power Amplifier Model	110
	6.2.3 Out-Of-Band Radiation	112
	6.2.4 Scatter Plots	114
	6.2.5 BER Performance	117
	6.3 Simulation Results and Discussion	118
	Chapter 7 Abstract	124
	Appendix	126
	A.1 DFT Operation at the Receiver	126
	A.2 CFO Coefficients	130
	A.3 Statistical Properties of the Estimate	132
	Bibliography	134
	Abbreviations and Symbols	144
	Abbreviations	144
	Symbols	146
	Variables	147