U

Index

[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Z]

U.S. Department of Defense network model. [See DoD network model]
UDP (User Datagram Protocol)
undesired signals (channels)
unicast transfer of information
uniform theory of diffraction. [See UTD]
unintentional radiation, FCC regulations
unique features (UWB)
     networking
     signals
         antennas
         diffculties using DSP technology
         future directions
         networking issues
         time domain design
         transmitter and receiver design
     systems
unit vector, antennas
University of Southern California. [See USC group]
unloaded quality factor (Q)
Update messages (TORA)
USC (University of Southern California) group, wireless communication research
User Datagram Protocol. [See UDP]
UTD (uniform theory of diffraction)
UWB networking
     data link layer design
         ARQ (automatic repeat request)
         channel partition medium access control
         contention-based medium access control
         FEC (forward error correction)
         multiple access protocols
         objectives
     multiple hop ad hoc networks
         flat network topologies
         hierarchical topologies
     physical layer issues
     QoS management
     TCP performance in wireless environments
     unique features
UWB pulse model, coexistence of UWB and NB systems
UWB signals
     coexistence with NB systems
         aggregate UWB interference modeling
         interference analysis
         waveform analysis
     I-UWB 2nd
         channel modeling
         history
         modulation schemes
         multiple access schemes
         overview
         pulse shapes
         receiver decision statistic
     MC-UWB 2nd
    propagation
         electromagnetic simulation in indoor environments
         measurement
         studies
         two-dimensional channel model for indoor propagation
         unique features of UWB signals
     range analysis using TOA (Time of Arrival)
     unique features
         antennas
         difficulties using DSP technology
         future directions
         networking issues
         propagation and channel models
         time domain design
         transmitter and receiver design
UWB simulations
     component simulation
         antenna effects
         pulse generation and modulation
         signal amplification
         UWB channels
     development
     discrete event simulation techniques
         entities
         events
         normal operation
         simulation development
         simulation performance considerations
         simulation sample
     MC-UWB simulation
     Monte Carlo simulation techniques
     semi-analytic simulation techniques
     unique features
         development challenges
         direct/quadrature signal decomposition
         model development
UWB standards (WPANs)
     DS-UWB PHY
         acquisition
         architecture
         overview
         performance
         simultaneously operating piconets
     IEEE 802.15.3/3a MAC
         data communication between DEVs
         interference mitigation
         piconets
         power management
         security
         superframe and channel time management
     IEEE 802.15.3a PHY
         channel model
         link budget
         overview of solution space
         selection criteria
     MB-OFDM PHY
         acquisition
         architecture
         performance
         proposal
         simultaneously operating piconets