公开(公告)号：KR101429705B1

公开(公告)日：2014-08-12

申请号：KR1020130099179

申请日：2013-08-21

Applicant: 주식회사알에프윈도우

Inventor： 오용석 ,  전영철 ,  박경수

IPC: H04B7/14

CPC classification number: H04B7/15585

Abstract: The present invention is provided to effectively cancel only interference signals by not using an auto-correlation canceler or a digital filter, but by using a normalizer to cancel unnecessary noise signals generated by narrowband signals; and to enable the design of an ICS repeater for LTE wireless networks which requires a short system time delay. In a device to cancel interference of an ICS repeater using a normalizer, which outputs an error signal (e(n)) of which the interference signal is canceled by subtracting a predicted feedback signal (y′(n)) in an ICS engine unit from an original signal (d(n)) inputted through a reception antenna through a subtractor, the ICS engine unit comprises: a time delay unit to generate a reference signal (x(n)) which delays the error signal (e(n)) outputted through the subtractor; a normalizer to generate a new reference signal (x′(n)) by normalizing the characteristics of the narrowband signals of the reference signal (x(n)) outputted from the time delay unit; a coefficient generation unit to calculate an interference signal prediction coefficient (w(n)) by calculating correlation between the new reference signal outputted from the normalizer and error signal; and an FIR filter to generate a predicted feedback signal (y′(n)) by performing convolution between the reference signal from the time delay unit and prediction coefficient from the coefficient generation unit, and inputting the predicted feedback signal into the subtractor.

Abstract translation: 本发明提供了通过不使用自相关消除器或数字滤波器来有效地消除干扰信号，而是通过使用归一化器来消除由窄带信号产生的不必要的噪声信号; 并且能够设计需要短的系统时间延迟的用于LTE无线网络的ICS中继器。 在使用归一化器消除ICS中继器的干扰的装置中，通过减去ICS引擎单元中的预测反馈信号（y'（n））来输出干扰信号被消除的误差信号（e（n）） 从通过减法器通过接收天线输入的原始信号（d（n）），ICS引擎单元包括：时间延迟单元，用于生成延迟误差信号（e（n））的参考信号（x（n） ）通过减法器输出; 通过归一化从时间延迟单元输出的参考信号（x（n））的窄带信号的特性来生成新的参考信号（x'（n））的归一化器; 系数产生单元，通过计算从归一化器输出的新的参考信号与误差信号之间的相关性来计算干扰信号预测系数（w（n））; 以及FIR滤波器，通过执行来自时间延迟单元的参考信号和来自系数生成单元的预测系数之间的卷积，并将预测的反馈信号输入到减法器中，生成预测反馈信号（y'（n））。