Interference suppression based on code grouping and groupwise decorrelation in multirate W-CDMA downlink

H. A. Won; Junghwa Bae; Jinwoo Park

Interference suppression based on code grouping and groupwise decorrelation in multirate W-CDMA downlink

H. A. Won, Junghwa Bae, Jinwoo Park

School of Electrical Engineering

Research output: Contribution to journal › Article

Abstract

In this paper, we presented a new interference suppression method based on groupwise decorrelation for the multirate wideband-code division multiple access (W-CDMA) downlink. Code grouping in the proposed method is performed according to the correlation property between the mother code and the child code in the orthogonal variable spreading factor (OVSF) code tree. The decorrelation process based on the grouped codes, so called groupwise decorrelation, is then performed to suppress the interference induced in the downlink propagation. We demonstrate that the proposed method can enhance the performance significantly, with lower computational complexity and higher operational efficiency in which any information about interference users (code, data, amplitude) is not required to know in prior at the detection stage.

Original language	English
Pages (from-to)	3125-3129
Number of pages	5
Journal	IEICE Transactions on Communications
Volume	E87-B
Issue number	10
Publication status	Published - 2004 Oct 1

Keywords

Code-grouping
Groupwise decorrelation
Interference suppression
OVSF
W-CDMA downlink

ASJC Scopus subject areas

Computer Networks and Communications
Electrical and Electronic Engineering

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Won, H. A., Bae, J., & Park, J. (2004). Interference suppression based on code grouping and groupwise decorrelation in multirate W-CDMA downlink. IEICE Transactions on Communications, E87-B(10), 3125-3129.

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AB - In this paper, we presented a new interference suppression method based on groupwise decorrelation for the multirate wideband-code division multiple access (W-CDMA) downlink. Code grouping in the proposed method is performed according to the correlation property between the mother code and the child code in the orthogonal variable spreading factor (OVSF) code tree. The decorrelation process based on the grouped codes, so called groupwise decorrelation, is then performed to suppress the interference induced in the downlink propagation. We demonstrate that the proposed method can enhance the performance significantly, with lower computational complexity and higher operational efficiency in which any information about interference users (code, data, amplitude) is not required to know in prior at the detection stage.

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