Artech House Universal Personal Communications

By: Richard Van Nee, Ramjee Prasad, Richard van Nee

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Hardcover | 31 December 1999

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Hardcover
270 Pages

Dimensions(cm)
24.77 x 15.82 x 1.91

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A study of OFDM, including a comparison with other forms of single carrier modulation methods. It provides the design guidelines needed to maximise benefits from this technology. There is practical advice on how to plan, design and use OFDM to make wireless multimedia communications happen. It offers a solid base for assessing the performance of wireless OFDM systems; explains how OFDM signals are formed using the Inverse Fast Fourier Transform, how the cyclic extension mitigates the effects of modulation, and how windowing can limit out-of-band radiation; discusses the sensitivity of OFDM to synchronization errors; examines the basics of direct sequence and frequency hopping CMDA, helpful in understanding combinations of OFDM and CDMA; explains Multicarrier CDMA, various transmitter architectures, and the pros and cons compared to other CDMA techniques; and includes a discussion of the combination of OFDM and frequency hopping CDMA to get a multiple access system with similar advantages to direct sequence CDMA.

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Non-Fiction Engineering & Technology Electronics & Communications Engineering Communications Engineering & Telecommunications Radio Technology Energy Technology & Engineering Electrical Engineering Computing & I.T.Graphical & Digital Media Applications

Preface	p. xiii
Acknowledgments	p. xvii
Introduction	p. 1
Standardization and Frequency Bands	p. 4
Multimedia Communications	p. 7
The Need for High Data Rates	p. 8
Services and Applications	p. 9
Antennas and Batteries	p. 9
Safety Considerations	p. 10
ATM-Based Wireless (Mobile) Broadband Multimedia Systems	p. 12
Multipath Propagation	p. 15
Multipath Channel Models	p. 16
Delay Spread Values	p. 17
Time Variation of the Channel	p. 19
History of OFDM	p. 20
Preview of the Book	p. 24
References	p. 25
OFDM Basics	p. 33
Introduction	p. 33
Generation of Subcarriers using the IFFT	p. 33
Guard Time and Cyclic Extension	p. 39
Windowing	p. 42
Choice of OFDM Parameters	p. 46
OFDM Signal Processing	p. 47
Implementation Complexity of OFDM Versus Single Carrier Modulation	p. 48
References	p. 51
Coding and Modulation	p. 53
Introduction	p. 53
Forward Error Correction Coding	p. 54
Block Codes	p. 54
Convolutional Codes	p. 55
Concatenated Codes	p. 58
Interleaving	p. 59
Quadrature Amplitude Modulation	p. 60
Coded Modulation	p. 62
References	p. 70
Synchronization	p. 73
Introduction	p. 73
Sensitivity to Phase Noise	p. 74
Sensitivity to Frequency Offset	p. 77
Sensitivity to Timing Errors	p. 78
Synchronization using the Cyclic Extension	p. 80
Synchronization using Special Training Symbols	p. 86
Optimum Timing in the Presence of Multipat	p. 88
References	p. 92
Coherent and Differential Detection	p. 95
Introduction	p. 95
Coherent Detection	p. 95
Two Dimensional Channel Estimators	p. 96
One Dimensional Channel Estimators	p. 103
Special Training Symbols	p. 104
Decision Directed Channel Estimation	p. 106
Differential Detection	p. 107
Differential Detection in the Time Domain	p. 107
Differential Detection in the Frequency Domain	p. 112
Differential Amplitude and Phase Shift Keying	p. 115
References	p. 117
The Peak Power Problem	p. 119
Introduction	p. 119
Distribution of the Peak-to-Average Power Ratio	p. 120
Clipping and Peak Windowing	p. 123
Required Backoff with a Non-Ideal Power Amplifier	p. 127
Coding and Scrambling	p. 130
Peak Cancellation	p. 131
PAP Reduction Codes	p. 138
Generating Complementary Codes	p. 141
Minimum Distance of Complementary Codes	p. 144
Maximum Likelihood Decoding of Complementary Codes	p. 145
Suboptimum Decoding of Complementary Codes	p. 147
Large Code Lengths	p. 150
SYMBOL Scrambling	p. 150
References	p. 153
Basics of CDMA	p. 155
Introduction	p. 155
CDMA: Past, Present, and Future	p. 156
CDMA Concepts	p. 157
Pure CDMA	p. 161
Basic DS-CDMA Elements	p. 171
RAKE Receiver	p. 171
Power Control	p. 172
Soft Handover	p. 173
Interfrequency Handover	p. 175
Multiuser Detection	p. 175
References	p. 176
Multi - Carrier CDMA	p. 179
Introduction	p. 179
Channel Model	p. 180
DS-CDMA and MC-CDMA Systems	p. 182
DS-CDMA System	p. 182
MC-CDMA System	p. 185
MC-CDMA System Design	p. 189
BEP LOWER Bound	p. 194
DS-CDMA System	p. 194
MC-CDMA System	p. 195
BEP Lower Bound Equivalence	p. 196
Numerical Results	p. 197
MC-CDMA System Design	p. 197
Down - Link BEP Performance	p. 199
Up - Link BER Performance	p. 203
Conclusions	p. 206
Appendix 8A	p. 208
References	p. 209
Orthogonal Frequency Division Multiple Access	p. 213
Introduction	p. 213
Frequency Hopping OFDMA	p. 213
Differences between OFDMA and MC-CDMA	p. 215
OFDMA System Description	p. 217
Channel Coding	p. 220
Modulation	p. 220
Time and Frequency Synchronization	p. 221
Initial Modulation Timing Synchronization	p. 221
Initial Frequency Offset Synchronization	p. 222
Synchronization Accuracy	p. 222
Power Control	p. 223
Random Frequency Hopping Operation	p. 224
Dynamic Channel Allocation (Fast DCA)	p. 225
Dynamic Channel Allocation (Simple DCA)	p. 227
Capacity of OFDMA	p. 227
Conclusions	p. 227
References	p. 228
Applications of OFDM	p. 229
Introduction	p. 229
Digital Audio Broadcasting	p. 229
Terrestrial Digital Video Broadcasting	p. 231
Magic WAND	p. 233
Magic WAND Physical Layer	p. 234
Coding	p. 236
Simulated Error Probabilities	p. 236
Effects of Clipping	p. 237
Magic WAND Medium Access Control Layer	p. 238
IEEE 802.11, HIPERLAN/2, and MMAC Wireless LAN Standards	p. 241
OFDM Parameters	p. 243
Channelization	p. 244
OFDM Signal Processing	p. 245
Training	p. 246
Differences between IEEE 802.11, HIPERLAN/2 and MMAC	p. 249
Simulation Results	p. 250
References	p. 252
About the Authors	p. 255
Index	p. 257
Table of Contents provided by Syndetics. All Rights Reserved.

Artech House Universal Personal Communications

At a Glance

Hardcover

Shipping

How to return your order

Defective items

You Can Find This Book In

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