An Equalized-RAKE Receiver for DS-CDMA Based UWB System
Date Issued
2004
Date
2004
Author(s)
Yang, Tien-Hung
DOI
en-US
Abstract
Inter-symbol interference (ISI) is one of the main impediments to efficient transmission in wireless communication. This thesis proposes an equalized-RAKE receiver with different types of equalizers for the DS-CDMA based UWB system in which the inter-chip interference (ICI) degrades the system performance significantly. We apply the concepts of time diversity to the proposed receiver which can gather enough multipath energy and effectively increase SNR by RAKE combining.
We simulate the system and demonstrate the performance of the proposed receiver in several kinds of channel models (or environments), including LOS, NLOS, and different distances between transmitter and receiver. We show that the equalized-RAKE receiver can effectively mitigate ICI and has a performance better than the matched-filter-type RAKE receiver and the conventional equalizer which has the performance close to that of a 2-finger equalized-RAKE receiver. Besides, the diversity gain is always obtained by RAKE combining in our simulation.
Subjects
時間分集
最大比例結合
等化性耙式接收器
線性回授等化器
線性等化器
耙式接收器
後第三代行動通信
直接序列分碼多工
超寬頻
路徑分集
最小均方誤差
time diversity
Maximum Ratio Combining
equalized-RAKE receiver
Linear Feedback Equalizer
Linear Equalizer
RAKE receiver
Beyond 3rd Generation
Direct-Sequence Code-Division Multiple Access
Ultra-Wideband
path diversity
Minimum Mean-Square Error
Type
thesis