DS-CDMA Receiver Design with Joint FDE and Antenna Diversity Techniques
Date Issued
2007
Date
2007
Author(s)
Lin, Chia-Hung
DOI
en-US
Abstract
Rake receiver has been proposed for DS-CDMA system since 1995s. However, the propagation channel suffers from severe frequency-selective fading due to high-speed data transmission so that the performance of Rake receiver severely degrades. Besides, the error floor scenario would appear if the system capacity is high enough. In order to overcome the drawbacks as mentioned above, FDE based receiver structure is introduced in this thesis. Three kinds of implementation methods are taken into account on designing FDE receiver, which are respectively MRC, ZF, and MMSE. From the theoretical and simulation results, MMSE-FDE receiver design method can obtain the best behavior since it can jointly deal with interference and noise effects. However, the system performance with FDE receiver is eliminated if the number of multiplex order increases or the equalization procedure is imperfect. To overcome these restrictions, MMSE-FDE receiver with BPIC technique is proposed to cancel the residual interference and improve the system performance. In addition, receiver antenna diversity technique is also employed in this thesis since it can combat the deep fading effects and provides a diversity gain to improve the system performance. Monte Carlo simulation is performed and the results would show that MMSE-FDE receiver design method can further improve the system performance through applying BPIC technique. Moreover, the performance would approach to the theoretical lower bound more closely if antenna diversity technique is employed.
Subjects
展頻分碼多工
頻域等化器
干擾消除
接收端天線分集技術
DS-CDMA
FDE
interference cancellation
receiver antenna diversity
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-96-R93942105-1.pdf
Size
23.31 KB
Format
Adobe PDF
Checksum
(MD5):a1112f02e0c94d7616fe453941a43265