Summary

The only book that provides full coverage of UWB multiband OFDM technology Ultra-wideband (UWB) has emerged as a technology that offers great promise to satisfy the growing demand for low-cost, high-speed digital networks. The enormous bandwidth available, the potential for high data rates, and the promise for small size and low processing power with reduced implementation cost all present a unique opportunity for UWB to become a widely adopted radio solution for future wireless home networking technology. Ultra-Wideband Communications Systems is the first book to provide comprehensive coverage of the fundamental and advanced issues related to UWB technology, with a particular focus on multiband orthogonal frequency division multiplexing (multiband OFDM). The multiband OFDM approach was a leading method in the IEEE 802.15.3astandard and has recently been standardized by ECMA International. The book also explores several major advanced state-of-the-art technologies to enhance the performance of the standardized multiband OFDM approach. Additional coverage includes: * Characteristics of UWB channels * An overview of UWB single-band and multiband OFDM approaches * MIMO multiband OFDM * Performance characterization * Performance under practical considerations * Differential multiband OFDM * Power-controlled channel allocation * Cooperative UWB multiband OFDM Complete with pointers for future research opportunities to enhance the performance of UWB multiband OFDM technology over current and future wireless networks, this is an indispensable resource for graduate students, engineers, and academic and industrial researchers involved with UWB.

Author Biography

W. Pam Siriwongpairat, PhD, is a Wireless Communications Specialist with Meteor Communications Corporation. From January to May 2006, she was a research associate in the Department of Electrical and Computer Engineering and Institute for Systems Research at the University of Maryland, College Park. Her current research interests span a broad range of areas from digital signal processing to wirelesscommunications and networking, including ultra-wideband communications, space-time-frequency coding for multi-antenna communications, cross-layer design for wireless networks, communications in mobile ad hoc networks and wireless sensor networks, OFDM systems, and software-defined radio and cognitive radio technologies.

K. J. Ray Liu, PhD, is Professor and Associate Chair for Graduate Studies and Research of Electrical and Computer Engineering Department at the University of Maryland, College Park. Dr. Liu is the recipient of numerous honors and awards including best paper awards from IEEE Signal Processing Society (twice), IEEE Vehicular Technology Society, and EURASIP, as well as recognitions from the University of Maryland including university-level Distinguished Scholar-Teacher Award, Invention of the Year Award, and college-level Poole and Kent Company Senior Faculty Teaching Award.

Preface	p. xiii
Introduction	p. 1
Overview of UWB	p. 1
Advantages of UWB	p. 3
UWB Applications	p. 4
UWB Transmission Schemes	p. 5
Challenges for UWB	p. 7
Channel Characteristics	p. 9
Large-Scale Models	p. 10
Path Loss Models	p. 10
Shadowing	p. 11
Small-Scale Models	p. 12
Tap-Delay-Line Fading Model	p. 13
[Delta] - K Model	p. 14
Saleh-Valenzuela Model	p. 15
Standard UWB Channel Model	p. 16
UWB: Single-Band Approaches	p. 19
Overview of Single-Band Approaches	p. 20
Modulation Techniques	p. 21
Pulse Amplitude Modulation	p. 21
On-Off Keying	p. 22
Phase Shift Keying	p. 22
Pulse Position Modulation	p. 23
Multiple Access Techniques	p. 23
Time-Hopping UWB	p. 24
Direct-Sequence UWB	p. 25
Demodulation Techniques	p. 26
Received Signal Model	p. 26
Correlation Receiver	p. 27
RAKE Receiver	p. 28
MIMO Single-Band UWB	p. 30
MIMO Space-Time-Coded Systems	p. 30
Space-Time-Coded UWB Systems	p. 32
Performance Analysis	p. 37
TH-BPPM	p. 38
TH-BPSK	p. 41
DS-BPSK	p. 42
Simulation Results	p. 44
Chapter Summary	p. 51
UWB: Multiband OFDM Approach	p. 53
Overview of Multiband OFDM Approach	p. 54
Fundamental Concepts	p. 54
Signal Model	p. 56
IEEE 802.15.3a WPAN Standard Proposal	p. 57
OFDM Parameters	p. 57
Rate-Dependent Parameters	p. 58
Operating Band Frequencies	p. 59
Channelization	p. 60
Physical Layer Design	p. 61
Scrambler and De-scrambler	p. 62
Convolutional Encoder and Viterbi Decoder	p. 62
Bit Interleaver and De-interleaver	p. 63
Constellation Mapper	p. 67
OFDM Modulation	p. 67
MAC Layer Design	p. 69
Network Topology	p. 69
Frame Architecture	p. 71
Network Operations	p. 72
Chapter Summary	p. 73
MIMO Multiband OFDM	p. 75
MIMO-OFDM Communications	p. 76
MIMO Multiband OFDM System Model	p. 78
Transmitter Description	p. 78
Channel Model	p. 80
Receiver Processing	p. 80
Performance Analysis	p. 82
Independent Fading	p. 83
Correlated Fading	p. 86
Simulation Results	p. 89
Chapter Summary	p. 94
Performance Characterization	p. 97
System Model	p. 98
Performance Analysis	p. 99
Average PEP Analysis	p. 100
Approximate PEP Formulation	p. 102
Outage Probability	p. 106
Analysis for MIMO Multiband OFDM Systems	p. 110
MIMO Multiband OFDM System Model	p. 110
Pairwise Error Probability	p. 111
Example: Repetition STF Coding Based on Alamouti's Structure	p. 113
Simulation Results	p. 114
Chapter Summary	p. 120
Performance Under Practical Considerations	p. 121
System Model	p. 122
Average Signal-to-Noise Ratio	p. 124
Expressions of Fading Term, ICI, and ISI	p. 124
Variances of Fading Term, ICI, and ISI	p. 127
Average Signal-to-Noise Ratio and Performance Degradation	p. 132
Average Bit Error Rate	p. 132
Overall Spreading Gain of 1	p. 134
Overall Spreading Gain of 2	p. 136
Overall Spreading Gain of 4	p. 137
Performance Bound	p. 140
Numerical and Simulation Results	p. 143
Numerical Results	p. 143
Simulation and Numerical Results	p. 145
Chapter Summary	p. 147
Derivations of A[subscript 1], A[subscript 2], B[subscript 1], and B[subscript 2]	p. 148
Derivation of A[subscript 1] and A[subscript 2]	p. 149
Derivation of B[subscript 1] and B[subscript 2]	p. 151
Differential Multiband OFDM	p. 155
Differential Modulation	p. 156
Single-Antenna Systems	p. 156
MIMO Systems	p. 157
Differential Scheme for Multiband OFDM Systems	p. 159
System Model	p. 159
Differential Encoding and Transmitting Signal Structure	p. 160
Multiband Differential Decoding	p. 162
Pairwise Error Probability	p. 163
Simulation Results	p. 166
Chapter Summary	p. 169
Power-Controlled Channel Allocation	p. 171
System Model	p. 172
Power-Controlled Channel Allocation Scheme	p. 174
Generalized SNR for Various Transmission Modes	p. 175
PER and Rate Constraint	p. 176
Problem Formulation	p. 177
Subband Assignment and Power Allocation Algorithm	p. 178
Joint Rate Assignment and Resource Allocation Algorithm	p. 179
Simulation Results	p. 182
Subband Assignment and Power Allocation	p. 182
Joint Rate Assignment and Resource Allocation	p. 185
Chapter Summary	p. 186
Cooperative UWB Multiband OFDM	p. 189
Cooperative Communications	p. 190
System Model	p. 191
Noncooperative UWB	p. 192
Cooperative UWB	p. 193
SER Analysis for Cooperative UWB	p. 194
Cooperative UWB	p. 194
Comparison of Cooperative and Noncooperative UWB	p. 199
Optimum Power Allocation for Cooperative UWB	p. 201
Power Minimization Using Cooperative Communications	p. 201
Coverage Enhancement Using Cooperative Communications	p. 205
Improved Cooperative UWB	p. 208
Simulation Results	p. 212
Chapter Summary	p. 215
References	p. 217
Index	p. 227
Table of Contents provided by Ingram. All Rights Reserved.

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Ultra-Wideband Communications Systems Multiband OFDM Approach

9780470074695

0470074698

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