公开(公告)号：KR1020030028111A

公开(公告)日：2003-04-08

申请号：KR1020010060078

申请日：2001-09-27

Applicant: 한국전자통신연구원

Inventor： 박재준 ,  오현서 ,  경문건 ,  이준환

IPC: H04B7/216

CPC classification number: H04W16/28 ,  H04B7/216 ,  H04W52/42 ,  H04W74/02

Abstract: PURPOSE: A space-time array receiving system in a CDMA(Code Division Multiple Access) and a method thereof are provided to easily cancel signals of several users located at the same region in a CDMA system under a multi path channel environment, thereby enhancing amount of a reverse direction channel. CONSTITUTION: A signal processing unit(20) consists of a multi-channel array receiver(21) which changes a plurality of signals received from an array antenna(10) into a base band digital signal. An arrival angle and beam coefficient estimator(23) estimates an arrival angle and beam formation coefficient of the received signal on the basis of a signal outputted from the multi-channel array receiver(21). A digital beam formation device(22) forms an optimum directional beam by multiplying a signal outputted from the multi-channel array receiver(21) by an estimated beam formation coefficient. A rake receiver(24) combines a signal outputted from the digital beam formation device(22) with the maximum ratio in order to maximize a signal power to noise of a user's signal to noise power. An adaptation plural user detector(25) cancels an identical channel interference signal to a signal outputted from the rake receiver(24). A controller(26) discriminates whether a user are positioned at the same position on the basis of an arrival angle of an estimated user, then controls the adaptation plural user detector(26) according to the result and performs a plural user detection method on the users positioned at the same position.

Abstract translation: 目的：提供CDMA（码分多址）的时空阵列接收系统及其方法，以便在多径信道环境下容易地消除位于CDMA系统中相同区域的多个用户的信号，从而增加数量 的反向通道。 构成：信号处理单元（20）包括将从阵列天线（10）接收的多个信号改变成基带数字信号的多通道阵列接收器（21）。 到达角度和光束系数估计器（23）基于从多通道阵列接收器（21）输出的信号估计接收信号的到达角度和波束形成系数。 数字波束形成装置（22）通过将从多通道阵列接收器（21）输出的信号乘以估计的波束形成系数来形成最佳定向波束。 耙式接收器（24）将从数字波束形成装置（22）输出的信号与最大比率相结合，以最大化用户信号与噪声功率的信号功率噪声。 适应多用户检测器（25）将相同的信道干扰信号与从耙式接收器（24）输出的信号相抵消。 控制器（26）基于估计用户的到达角度来判断用户是否处于相同位置，然后根据结果控制适配多用户检测器（26），并对该用户检测方法 用户位于同一位置。

公开(公告)号：KR1020020039424A

公开(公告)日：2002-05-27

申请号：KR1020000069229

申请日：2000-11-21

Applicant: 한국전자통신연구원

Inventor： 경문건 ,  박재준

IPC: H04B7/216

CPC classification number: H04L1/0618 ,  H04B1/712 ,  H04L1/0631

Abstract: PURPOSE: A system for receiving an ultra-high performance space-time array of a fading adaptive type and a method thereof are provided to select a correlation length of a pilot channel in adaptable and perform a correlation using a variation amount of a fading channel obtained through a doppler frequency estimation and a data rate of a receiving signal when a pilot channel is correlated for compensating a distortion phenomenon by a fading channel in a reverse direction link of a CDMA wireless communication system applying an array antenna. CONSTITUTION: A plurality of digital beam forming networks(120) perform a space filtering by multiplying a receiving signal which is received from a plurality of antennas and converted into a digital signal by a weight value vector according to each multiple path signal, and forms a beam. A plurality of demodulators(160) demodulate output signals of a plurality of digital beam forming networks. A pilot channel correlator estimates a fading channel using a pilot signal in the demodulators(160). A doppler frequency estimation unit(150) receives an output of the pilot channel correlator and estimates a doppler frequency of the fading channel. A microprocessor(180) supplies data rate information of a received signal and controls a signal flow. A correlation length selection unit(140) receives a doppler frequency estimation value estimated from the doppler frequency estimation unit(150) and a data rate of a received signal and decides a correlation length of the pilot channel correlator. A reference signal generator(170) receives outputs of a plurality of fingers and generates a reference signal. A plurality of weight value vector estimators receive an output of the reference signal generator(170) and the receiving signal and supplies the digital beam forming network(120).

Abstract translation: 目的：提供一种用于接收衰落自适应类型的超高性能时空阵列及其方法的系统，用于选择可适应的导频信道的相关长度，并使用获得的衰落信道的变化量来执行相关性 通过多普勒频率估计和当导频信道相关联的接收信号的数据速率时，通过应用阵列天线的CDMA无线通信系统的反向链路中的衰落信道来补偿失真现象。 构成：多个数字波束形成网络（120）通过将从多个天线接收的接收信号相乘并根据每个多路径信号被加权值向量转换为数字信号来执行空间滤波，并形成 光束。 多个解调器（160）解调多个数字波束形成网络的输出信号。 导频信道相关器使用解调器（160）中的导频信号来估计衰落信道。 多普勒频率估计单元（150）接收导频信道相关器的输出并估计衰落信道的多普勒频率。 微处理器（180）提供接收信号的数据速率信息并控制信号流。 相关长度选择单元（140）接收从多普勒频率估计单元（150）估计的多普勒频率估计值和接收信号的数据速率，并确定导频信道相关器的相关长度。 参考信号发生器（170）接收多个手指的输出并产生参考信号。 多个权重值向量估计器接收参考信号发生器（170）的输出和接收信号并提供数字波束形成网络（120）。