A Robust Eigenanalysis Interference Canceller for CDMA Signals

Ann-Chen CHANG  Shiaw-Wu CHEN  

Publication
IEICE TRANSACTIONS on Communications   Vol.E92-B   No.7   pp.2516-2519
Publication Date: 2009/07/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E92.B.2516
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
adaptive beamforming,  interference suppression,  noise subspace,  pointing error,  

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Summary: 
This letter deals with robust interference suppression based on eigenanalysis interference canceller (EIC) with the joint code-aid and noise subspace-based correcting approach. It has been shown that the EIC is very sensitive to pointing error, especially when the interference number is overestimated. Based on the corrected steering angle, a proper blocking matrix of the EIC can be obtained to suppress the leakage of desired signal. Therefore, desired signal cancellation does not occur; even if the interference number is overestimated in constructing the interference subspace. Several computer simulations are provided to demonstrate the effectiveness of the proposed approach.