A new low-complex interference cancellation scheme for WCDMA indoor repeaters

2008 IEEE Region 8 International Conference on Computational Technologies in Electrical and Electronics Engineering Pub Date : 2008-07-21 DOI:10.1109/SIBIRCON.2008.4602558

Moohong Lee, Byungjik Keum, Y. Son, Joo-Wan Kim, Hwang-Soo Lee

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引用次数: 13

Abstract

A new low-complex interference cancellation scheme for WCDMA indoor repeaters is presented in this paper. The real time interference cancellation performance of an indoor repeater depends on its computational complexity. In order to reduce the complexity of interference cancellation repeaters, computationally efficient interpolated filters are used as an input filter for frequency band selection and an output filter for spectrum mask control. Interpolation is applied to the implementation of an adaptive filter that performs interference cancellation under indoor channel environments. This allows the adaptive filter to calculate fewer filter taps and only uses them to estimate the feedback signal. For additional complexity reduction, a single common image rejection filter is designed to be shared among interpolated filters. The proposed scheme reduces the complexity of the conventional interference cancellation repeater by half without deterioration of the interference cancellation performance of the repeater.

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一种新的WCDMA室内中继器低复杂度干扰消除方案

提出了一种新的WCDMA室内中继器低复杂度干扰消除方案。室内中继器的实时抗干扰性能取决于其计算复杂度。为了降低干扰消除中继器的复杂度，采用计算效率高的内插滤波器作为频带选择的输入滤波器和频谱掩模控制的输出滤波器。插值应用于自适应滤波器的实现，该滤波器在室内信道环境下执行干扰消除。这允许自适应滤波器计算更少的滤波器抽头，只使用它们来估计反馈信号。为了进一步降低复杂度，我们设计了一个通用的图像抑制滤波器，在多个插值滤波器之间共享。该方案在不降低干扰消除中继器性能的前提下，将传统干扰消除中继器的复杂性降低了一半。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2008 IEEE Region 8 International Conference on Computational Technologies in Electrical and Electronics Engineering

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