Inner-Chip-Interference Cancellation Using Rake Receiver with Wiener Filter

Tsung-ting TSAI  Soichi WATANABE  Yung-Liang HUANG  Takuro SATO  

Publication
IEICE TRANSACTIONS on Communications   Vol.E87-B   No.11   pp.3295-3302
Publication Date: 2004/11/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Terrestrial Radio Communications
Keyword: 
W-CDMA,  Wiener filter,  indoor interference cancellation,  

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Summary: 
In this paper, a sub-optimal Rake receiver combined with a Wiener Filter is investigated for use in an indoor environment. Inner-Chip-interference is dominant when the application is indoors, so the inner-chip-interference rejection function becomes critical for the receiver. Pilot symbols in each slot are used for channel estimation and weight calculation of Rake combining through Wiener Filter. Compared to conventional combining which uses maximum ratio combining, Wiener combining using IRC (Interference rejection combining) achieves better ICI (Inner-chip-Interference) rejection. This paper clarified that the sub optimal Rake receiver using Wiener Filter is 4 dB better than the conventional Rake receiver under the indoor application.