期刊名称：Journal of Theoretical and Applied Information Technology
印刷版ISSN：1992-8645
电子版ISSN：1817-3195
出版年度：2014
卷号：61
期号：1
出版社：Journal of Theoretical and Applied
摘要：In this paper, four levels of analysis and synthesis filter banks are proposed to create, coefficients for a continuous wavelet transform (CWT), a discrete wavelet transform (DWT), and an inverse, discrete wavelet transform (IDWT). The main property of these wavelet transform schemes is their ability to construct the transmitted signal across a log-normal fading channel over additive, white Gaussian noise (AWGN). There are many applications of wavelet transforms in wireless communication systems, and we chose the design of rake receivers as a major application to mitigate interferences and reduce the noise. In this research, a new scheme of rake receivers was proposed to receive indoor, multi-path components (MPCs) for ultra-wideband (UWB) wireless communication systems. Rake receivers consist of a continuous wavelet rake (CWR) and a discrete wavelet rake (DWR), and they use huge bandwidth (7.5 GHz), as reported by the Federal Communications Commission (FCC). The indoor channel models chosen for analysis in this research were the line-of-sight (LOS) channel model (CM1 from 0 to 4 meters) and the non-line-of-sight (NLOS) channel model (CM3 from 4 to 10 meters). Two types of rake receiver were used in the simulation, i.e., partial-rake and selective-rake receivers with the maximal ratio combining (MRC) technique to capture the energy of the signal from the output of the rake�s fingers. In the simulation, the transmitted and received radiations are presented with UWB single-in, single-out (SISO) with Walsh matrix coding.
关键词：UWB Indoor Wireless Communication Systems; LOS And NLOS Channel Models; Continuous Wavelet And Discrete Wavelet Rake Receivers; Analysis And Synthesis Filter Banks.
