Performance Comparison with Different Beamforming Technoques for WCDMA Communication Systems
Date Issued
2004
Date
2004
Author(s)
Liu, Shui-Yuan
DOI
en-US
Abstract
In this thesis, we discuss the effect of multiple access interference (MAI) in a WCDMA communication system. In uplink, there are more than two users share the same frequency band in a WCDMA/FDD system, and signals from all users arrive at the base station asynchronously. We extract desired user’s signals from received signals by employing beamforming techniques in smart antenna systems. Here, we propose a new channel model as our outdoor environment channel, which is called the GTVVC model. We compare the uplink SINR performance and downlink SINR performance respectively with different channels by employing several beamforming methods, which are the Recursive Least Squares (RLS) method, the Least Mean Squares (LMS) method, the Complex Conjugate (CC) method and the Direction of Arrival (DOA) method. We also observe the power degradation when applying uplink beamforming weights to downlink beamforming weights. Finally, we compare the system performance by using different channel models, which are the measured data from an outdoor wireless channel and the GTVVC channel.
Subjects
智慧型天線
寬頻分碼多工
最大比例結合
耙式接收機
共軛複數法
二維耙式接收機
入射角法
最小平均平方法
遞回最小平方法
陣列圖案
波束合成技巧
GTVVC 模型
WCDMA
Beamforming technique
Recursive-Least-Squares method
RAKE receiver
2D Rake receiver
Direction-of-Arrival method
maximum ratio combining
Smart antenna
Least-Mean-Squares method
Array pattern
Complex-Conjugate method
Type
thesis
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