Multiple Pre-Rake Filtering Based on the Predicted Channel Impulse Response in the Transmitter and a Rake Combiner in the Receiver for TDD/DS-CDMA Mobile Communication Systems

URI http://harp.lib.hiroshima-u.ac.jp/hiroshima-cu/metadata/4066
File
Title
Multiple Pre-Rake Filtering Based on the Predicted Channel Impulse Response in the Transmitter and a Rake Combiner in the Receiver for TDD/DS-CDMA Mobile Communication Systems
Author
氏名 AHN Chang-Jun
ヨミ アン チャンジュン
別名 安 昌俊
氏名 SASASE Iwao
ヨミ ササセ イワオ
別名 笹瀬 巌
Subject
CDMA
Rake receiver
pre-Rake system
time division duplex (TDD)
Abstract

The pre-Rake system is known as a technique in TDD DS/CDMA system to reduce the mobile complexity and achieve the same BER performance like Rake receiver. The pre-Rake system itself is not optimum, since the channel impulse responses of uplink and downlink are slightly different in TDD system, so the signal- to-noise ratio (SNR) can be maximized with a matched filter based Rake receiver, which has not been considered in the conventional pre-Rake system. Furthermore pre-Rake system is sensitive to the Doppler frequency. Even though the pre-Rake system has the ability to suppress other user interference, it is not efficient to maximize the received signal in high Doppler frequency. However, Rake combiner is utilized for the detection method in our proposed system. So the maximized signal can keep the orthogonality better than the pre-Rake system and our proposed system can compensate the Doppler frequency effect. From these reasons, our system achieves better BER performance than that of the pre-Rake system with increasing the number of users in high Doppler frequency.

Description Peer Reviewed
Journal Title
IEICE TRANSACTIONS on Communications
Volume
E85-B
Issue
10
Spage
2282
Epage
2291
Published Date
2002-10-01
Publisher
電子情報通信学会(IEICE)
ISSN
0916-8516
NCID
AA10826261
Language
eng
NIIType
Journal Article
Text Version
出版社版
Rights
copyright©2002 IEICE
Relation URL
Old URI
Set
hiroshima-cu