RT Generic
T1 Wavelet packet modulation a new equalization scheme
A1 Sotillo Mallo, Javier
AB Multicarrier modulation systems have experienced a tremendous growth in complexity andpossibilities during the past decade, allowing data transmission rates never before imagined,leading to the commercial appearing of high-definition video on demand on mobilescenarios, faster Ethernet connections, increased number of digital television channels, etc.This tremendous change came up with the application of OFDM in various branches relatedto information interchange: ADSL and VDSL networks, DVB, WLAN, digital radio,or even the 4th generation standard for mobile communications (LTE). Therefore, OFDMis a cornerstone for communication exchange, but at the same time there are some aspectsthat might be improved, especially its flexibility and spectral efficiency. Wavelet-Basedcommunication systems have some advantages like lower transmitted signal Sidelobe Level(SLL), higher spectral efficiency as well as higher flexibility with respect to OFDM technology.However, there is an important lack for WPM systems: its structure is complexand there is a lack of specific equalization schemes for it. In this thesis, we will go indeep of the Wavelet Packet System and try to find an equivalent and more efficient model,that leads to a proper specific equalization to improve the characteristics of these systems.Then, after introducing Wavelet theory and the equalization methods, we will presentthe concept of a post-processing equalization scheme, whose main components will bedescribed in detail. Afterwards the new system will be tested in different scenarios inorder to verify and validate theoretical assumptions, to finally conclude this work with asummary of conclussions and related work.
YR 2015
FD 2015-09-07
LK https://hdl.handle.net/10016/26062
UL https://hdl.handle.net/10016/26062
LA eng
DS e-Archivo
RD 30 abr. 2024