Introduction to Ultra Wideband for Wireless Communications

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Springer Science & Business Media, Oct 11, 2008 - Technology & Engineering - 188 pages
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asakta-buddhih sarvatra . jitatma vigata-sprhah . . . . naiskarmya-siddhim paramam . sannyasenadhigacchati Detached by spiritual intelligence from everything controlling the mind, without material desires, one attains the paramount perfection in cessation of re- tions by renunciation. The Bhagvad Gita (18.49) Compared to traditional carrier-based, Ultra-Wide Band (UWB), or carrier-less, systems implement new paradigms in terms of signal generation and reception. Thus, designing an UWB communication system requires the understanding of how excess bandwidth and very low transmitted powers can be used jointly to provide a reliable radio link. UWB offers systems transceiver potential for very simple implementations. Comparison between UWB and traditional narrow-band systems highlights the following features: Large bandwidth enables very fine time-space resolution for accurate lo- tion of the UWB nodes and for distributing network time stamps. Very short pulses are effectively counter-fighting the channel effect in very dense multipath environments. Data rate (number of pulses transmitted per bit) can be traded with power emission control and distance coverage. Very low power density leads to low probability of signal detection and adds security for all the layers of the communication stack. Very low power density is obtained through radio regulation emission masks; UWB systems are suitable for coexistence with already deployed narrow-band systems.
 

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Contents

Introduction
1
12 Preview of the Book
7
References
10
UWB For Wireless Communications
11
21 UWB Definition
12
22 FCC Mask
13
221 Hermite Pulses
19
222 Legandre Pulses
20
References
115
UWB Technologies
117
711 Complexity
119
714 IR Industry Standard Groups
120
73 Multiband OFDM
121
731 Complexity
124
735 MBOFDM Industry Standard Groups
125
741 Interference
126

223 Prolate Spheroidal Functions
22
23 UWB Features
25
Problems
26
References
27
UWB Antennas
29
31 Antenna Requirements
31
33 Link Budget for UWB System Taking into Account the UWB Antennas
32
34 Short Range Analysis of UWB Antennas
37
342 Antenna Mismatch
39
35 Summary
40
References
41
Ultra Wide Band Wireless Channels
43
41 Impulse Response Modeling of UWB Wireless Channels
45
411 Distribution of Amplitude Fading
46
412 Distribution of Time of Arrival
50
413 Path Loss
53
414 PowerDelay Profiles
55
415 RMS Delay Spread
56
42 Modified Impulse Response Method
57
43 The IEEE UWB Channel Model
58
44 Frequency Modeling of UWB Channels
60
45 Comparison of Time and Frequency Models
62
References
64
UWB Interference
66
IEEE80211a Interference
68
52 General Method of Signal to Interference Ratio Calculation
70
53 Interference of UWB to Existing OFDM System
73
54 Interference of UWB to Narrowband Systems
80
55 Interference to WiMax
82
56 Interference Reduction
83
57 Interference Mitigation of Wideband System on UWB Using Multicarrier Templates
84
58 Summary
89
References
92
UWB Signal Processing
93
612 Comparison of Data Modulation Schemes
95
613 UWB Multiple Access Modulation
98
615 Pseudorandom Time Hopping
100
63 Rake Receiver
104
64 TransmitReference TR Technique
106
65 UWB Range Data Rate Performance
108
66 UWB Channel Capacity
111
67 Summary
112
742 Robustness to Multipath
127
744 Complexity
128
745 Achievable RangeData Rate Performance
129
Problems
131
References
132
UWB Wireless Locationing
134
81 Position Locationing Methods
136
812 Angle of Arrival AOA
137
813 Time of Arrival TOA
138
82 Time of Arrival Estimation
141
822 ESPRIT Technique
142
823 CLEAN Technique
143
824 SuperResolution Technique
144
825 NonCoherent Technique
146
83 NLOS Location Error
147
84 Locationing with OFDM
148
85 Summary
150
References
151
UWB Applications
153
92 UWB Wireless Sensor Networks
155
93 RFID
156
94 Consumer Electronics and Personal Computers PC
157
96 Medical Applications
158
97 Summary
159
References
160
UWB Regulation
163
101 UWB Regulation in US
164
102 UWB Regulation in Europe
165
103 UWB Regulation in Japan
167
104 UWB Regulation in Korea
168
106 UWB Regulation in ITU
169
108 Summary
170
Problems
171
The Vision of Europe on UWB Applications
172
111 Magnet My Personal Adaptive Global NET
174
1111 MCUWB
177
1113 IRUWB
179
1114 Conclusion on Interfaces
180
113 Pulsers Pervasive UltraWideband Low Spectral Energy Radio Systems
181
114 Summary
183
Index
185
Copyright

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About the author (2008)

Prof. Ramjee Prasad is the Director of the Wireless Centre at Aalborg University in Denmark. He recently won a distinguished "Nordic" award for research achievements in the field of wireless communications. Ramjee Prasad is editor-in-chief for our Wireless Personal Communication journal and has also published over 15 books, mostly with Artech House though he is now eager to start publishing more of his books also with Springer.

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