An Introduction to Ultra Wideband Communication Systems

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 informationuniform 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, antennasUniversity of Southern California. [See USC group]

unloaded quality factor (Q)

Update messages (TORA) USC (University of Southern California) group, wireless communication researchUser 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 systemsUWB 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