公开(公告)号：US20120093261A1

公开(公告)日：2012-04-19

申请号：US13273423

申请日：2011-10-14

申请人： Jun Woo Kim ,  Jung Pil Choi ,  Hyeong Sook Park ,  Eon Young Hong ,  Youn Ok Park

发明人： Jun Woo Kim ,  Jung Pil Choi ,  Hyeong Sook Park ,  Eon Young Hong ,  Youn Ok Park

IPC分类号： H04L27/06 ,  H04L27/00

CPC分类号： H04L5/0007 ,  H04L5/0048 ,  H04L27/2613 ,  H04L27/2627

摘要： Disclosed herein are a method and an apparatus for transmitting a downlink control signal in a wireless communication system. The apparatus for transmitting a downlink control signal includes: a preamble symbol generator generating preamble orthogonal frequency division multiplexing (OFDM) symbols based on a first pilot pattern among pilot patterns for each of the plurality of transmit antennas; a midamble symbol generator generating midamble OFDM symbols based a second pilot pattern excluding the first pilot pattern from the pilot patterns for each of the plurality of transmit antennas; an IFFT unit performing inverse fast Fourier transform (IFFT) for each transmit antenna on the preamble OFDM symbol and the midamble OFDM symbol; and a plurality of transmit antennas transmitting the preamble OFDM symbols and the midamble OFDM symbols.

摘要翻译： 这里公开了一种用于在无线通信系统中发送下行链路控制信号的方法和装置。 用于发送下行链路控制信号的装置包括：前导码符号生成器，用于在多个发送天线中的每一个的导频模式中基于第一导频模式生成前导码正交频分复用（OFDM）符号; 基于针对所述多个发射天线中的每一个的导频模式，基于不包括所述第一导频模式的第二导频模式生成中间码OFDM符号的中间码符号发生器; IFFT单元对前导OFDM符号和中间码OFDM符号上的每个发射天线进行快速傅立叶逆变换（IFFT）; 以及发送前导OFDM符号和中间码OFDM符号的多个发送天线。

公开(公告)号：US08599911B2

公开(公告)日：2013-12-03

申请号：US13453450

申请日：2012-04-23

申请人： Hyeong Sook Park ,  Jun Woo Kim ,  Youn Ok Park

发明人： Hyeong Sook Park ,  Jun Woo Kim ,  Youn Ok Park

IPC分类号： H04B3/46

CPC分类号： H04B17/336 ,  H04B17/318 ,  H04B17/345

摘要： There is provided a method and apparatus for estimating a signal to noise ratio (SNR) in a wireless communication system. The apparatus selects a preamble signal for each of a plurality of sectors from a reception signal experienced by fast Fourier transform (FFT), outputs a correlation signal by performing a correlation between the preamble signal for each sector and a preamble reference signal, estimates power of the reception signal and noise power for each sector based on the correlation signal, selects a minimum value from among the noise powers for the sectors, outputs a net power for each sector by subtracting the minimum value from the power of the reception signal for each sector, and calculates the SNR by dividing the net power for each sector by the minimum value.

摘要翻译： 提供了一种用于估计无线通信系统中的信噪比（SNR）的方法和装置。 该装置从快速傅里叶变换（FFT）所经历的接收信号中选择多个扇区中的每一个的前同步信号，通过执行每个扇区的前导码信号与前导码参考信号之间的相关来输出相关信号， 基于相关信号对每个扇区的接收信号和噪声功率，从扇区的噪声功率中选择最小值，通过从每个扇区的接收信号的功率中减去最小值来输出每个扇区的净功率 ，并且通过将每个扇区的净功率除以最小值来计算SNR。

公开(公告)号：US08135079B2

公开(公告)日：2012-03-13

申请号：US12177511

申请日：2008-07-22

申请人： Hyeong Sook Park ,  Jun-Woo Kim ,  Eon Young Hong ,  Youn Ok Park

发明人： Hyeong Sook Park ,  Jun-Woo Kim ,  Eon Young Hong ,  Youn Ok Park

IPC分类号： H04K1/10

CPC分类号： H04L27/2647 ,  H04B17/336 ,  H04L27/2662

摘要： The present invention relates an apparatus and method of estimating a signal-to-noise ratio (SNR) of a received signal when the received signal has a timing offset. An apparatus for estimating a signal-to-noise ratio (SNR) according to an exemplary embodiment of the present invention includes a fast Fourier transform (FFT) unit that performs a fast Fourier transform on a received signal to convert the received signal into a frequency domain signal; a preamble selector that extracts a preamble from the frequency domain signal; a correlator that correlates the preamble to a preamble reference signal generated by a receiver to calculate a correlation value; an entire power estimator that calculates entire power; a noise power estimator that applies a differential demodulation method to the correlation value to remove a timing offset and calculate noise power; and an estimating unit that uses the entire power and the noise power to estimate the signal-to-noise ratio (SNR).

摘要翻译： 本发明涉及一种当接收信号具有定时偏移量时估计接收信号的信噪比（SNR）的装置和方法。 根据本发明的示例性实施例的用于估计信噪比（SNR）的装置包括对接收信号执行快速傅里叶变换的快速傅里叶变换（FFT）单元，以将接收到的信号转换成频率 域信号 前导码选择器，从所述频域信号中提取前同步码; 相关器，其将所述前导码与由接收器生成的前导码参考信号相关联，以计算相关值; 整个功率估计器，用于计算整个功率; 噪声功率估计器，其对所述相关值应用差分解调方法以去除定时偏移并计算噪声功率; 以及使用整个功率和噪声功率来估计信噪比（SNR）的估计单元。

公开(公告)号：US20110141962A1

公开(公告)日：2011-06-16

申请号：US12868164

申请日：2010-08-25

申请人： Jun-Woo Kim ,  Young Jo Bang ,  Youn Ok Park

发明人： Jun-Woo Kim ,  Young Jo Bang ,  Youn Ok Park

IPC分类号： H04H20/71

CPC分类号： H04H20/67 ,  H04L27/2649 ,  H04L27/2656

摘要： An apparatus for demodulating signals received from a plurality of base stations including a serving base station and a neighbor base station determines start timings of a serving cell signal transmitted from the serving base station and neighbor cell signals transmitted from the neighbor base stations, and verifies whether or not the neighbor cell signals that are earlier than the serving cell signal are provided on the basis of the determined start timings. Next, the apparatus selects a section where the reception energy of the symbol has the maximum level among symbols corresponding to signals of frames corresponding to the signals, respectively, as a demodulation section, and demodulates a multicast signal including the received signals on the basis of the selected demodulation section.

摘要翻译： 用于解调从包括服务基站和相邻基站的多个基站接收的信号的装置确定从服务基站发送的服务小区信号的开始定时和从邻近基站发送的相邻小区信号，并且验证是否 或者不是基于所确定的开始定时来提供早于服务小区信号的相邻小区信号。 接下来，该装置分别选择符号的接收能量分别与对应于信号的帧的信号相对应的符号中具有最大电平的部分作为解调部分，并且基于以下方式对包括接收信号的多播信号进行解调 所选解调部分。

公开(公告)号：US20110286500A1

公开(公告)日：2011-11-24

申请号：US13113549

申请日：2011-05-23

申请人： Jun-Woo KIM ,  Young Jo Bang ,  Byung-Han Ryu ,  Hyeong Jun Park ,  Youn Ok Park ,  Jee Hwan Ahn

发明人： Jun-Woo KIM ,  Young Jo Bang ,  Byung-Han Ryu ,  Hyeong Jun Park ,  Youn Ok Park ,  Jee Hwan Ahn

IPC分类号： H04B3/36

CPC分类号： H04W56/0085 ,  H04B7/15 ,  H04B7/155 ,  H04L27/2655 ,  H04L27/2656 ,  H04L27/2671 ,  H04L27/2676

摘要： A synchronization method of a radio repeater includes: using a first signal, a second signal, and a received signal including the first signal and the second signal to calculate correlation values of the first signal and the second signal; using the first signal correlation value, the second signal correlation value, and the power value of the received signal to output normalized correlation values; subtracting the normalized correlation value of the first signal and the normalized correlation value of the second signal; and detecting a start interval of the second signal based on the subtraction result and outputting a synchronization signal to synchronize the radio repeater.

摘要翻译： 无线电中继器的同步方法包括：使用第一信号，第二信号和包括第一信号和第二信号的接收信号，以计算第一信号和第二信号的相关值; 使用第一信号相关值，第二信号相关值和接收信号的功率值来输出归一化相关值; 减去第一信号的归一化相关值和第二信号的归一化相关值; 以及基于所述减法结果检测所述第二信号的开始间隔，并输出同步信号以同步所述无线电中继器。

公开(公告)号：US08135087B2

公开(公告)日：2012-03-13

申请号：US12629376

申请日：2009-12-02

申请人： Young Ha Lee ,  Seungjae Bahng ,  Kyung Yeol Sohn ,  Youn Ok Park

发明人： Young Ha Lee ,  Seungjae Bahng ,  Kyung Yeol Sohn ,  Youn Ok Park

IPC分类号： H04B7/02 ,  H04L5/12

CPC分类号： H04L25/03171 ,  H04L27/38 ,  H04L2025/03426

摘要： A method for signal detection using a log likelihood ratio in a multi-input multi-output communication system includes reconfiguring the signals received through the reception antennas on the basis of channel characteristics and acquiring candidate groups for each transmission symbol by acquiring a signal constellation of one quadrant with respect to signals generatable for each transmission symbol and signal constellations for the remaining quadrants on the basis of the reconfigured signals.

摘要翻译： 一种使用多输入多输出通信系统中的对数似然比的信号检测方法，包括基于信道特性重新配置通过接收天线接收的信号，并通过获取一个信号星座来获取每个发送符号的候选组 基于重新配置的信号，对于每个发送符号可产生的信号和剩余象限的信号星座的象限。

公开(公告)号：US08654905B2

公开(公告)日：2014-02-18

申请号：US12204464

申请日：2008-09-04

申请人： Hoon Lee ,  Chang Wahn Yu ,  Youn Ok Park

发明人： Hoon Lee ,  Chang Wahn Yu ,  Youn Ok Park

IPC分类号： H04B1/10

CPC分类号： H04L25/03159 ,  H04L27/2647

摘要： An apparatus for canceling interference includes a plurality of converters, a plurality of interference cancellation units, a plurality of variance detectors, and an output selecting unit. The plurality of converters converts a plurality of received signals to a plurality of frequency domain signals, respectively. The plurality of interference cancellation units cancel interference in the plurality of frequency domain signals using a plurality of interference cancellation schemes to generate a plurality of interference-canceled signals corresponding to the plurality of interference cancellation schemes, respectively. The plurality of variance detectors measure a plurality of amounts of residual interference corresponding to the plurality of interference-canceled signals, respectively. The output selecting unit selects a single interference-canceled signal with the least amount of residual interference from the plurality of interference-canceled signals, based on the plurality of amounts of residual interference.

摘要翻译： 用于消除干扰的装置包括多个转换器，多个干扰消除单元，多个方差检测器和输出选择单元。 多个转换器将多个接收信号分别转换成多个频域信号。 多个干扰消除单元使用多个干扰消除方案来消除多个频域信号中的干扰，以分别产生与多个干扰消除方案对应的多个干扰消除信号。 多个方差检测器分别测量与多个干扰消除信号相对应的多个残余干扰量。 输出选择单元基于多个残留干扰量从多个干扰消除信号中选择具有最小残留干扰量的单个干扰消除信号。

公开(公告)号：US20120269248A1

公开(公告)日：2012-10-25

申请号：US13453464

申请日：2012-04-23

申请人： Hoon LEE ,  Young Jo Bang ,  Seungjae Bang ,  Jung Pil Choi ,  Youn Ok Park ,  Jae Kwon Kim ,  Nulibyul Kim

发明人： Hoon LEE ,  Young Jo Bang ,  Seungjae Bang ,  Jung Pil Choi ,  Youn Ok Park ,  Jae Kwon Kim ,  Nulibyul Kim

IPC分类号： H04L27/06 ,  H04B17/00

CPC分类号： H04L25/03318 ,  H04B7/0854 ,  H04L25/03286 ,  H04L25/03292 ,  H04L25/03891 ,  H04L25/067

摘要： A receiver in a multiple-input multiple-output (MIMO) system is provided. The receiver includes a channel estimator estimating a channel based on a receiving signal, a minimum mean square error (MMSE) based reciprocal log likelihood ratio (R-LLR) calculator connected with the channel estimator and calculating an R-LLR based on the receiving signal and the estimated channel, and a channel decoder connected with the MMSE based R-LLR calculator and decoding the channel and the receiving signal based on the calculated R-LLR, wherein the R-LLR is calculated based on the reciprocity.

摘要翻译： 提供了一种多输入多输出（MIMO）系统中的接收机。 接收机包括基于接收信号估计信道的信道估计器，与信道估计器连接的基于最小均方误差（MMSE）的倒数似然比（R-LLR）计算器，并基于接收信号计算R-LLR 和估计信道，以及与基于MMSE的R-LLR计算器连接的信道解码器，并且基于所计算的R-LLR对信道和接收信号进行解码，其中基于互易性来计算R-LLR。

公开(公告)号：US08654882B2

公开(公告)日：2014-02-18

申请号：US13453464

申请日：2012-04-23

申请人： Hoon Lee ,  Young Jo Bang ,  Seungjae Bang ,  Jung Pil Choi ,  Youn Ok Park ,  Jae Kwon Kim ,  Nulibyul Kim

发明人： Hoon Lee ,  Young Jo Bang ,  Seungjae Bang ,  Jung Pil Choi ,  Youn Ok Park ,  Jae Kwon Kim ,  Nulibyul Kim

IPC分类号： H04B7/02 ,  H04L1/02 ,  H04L27/06

CPC分类号： H04L25/03318 ,  H04B7/0854 ,  H04L25/03286 ,  H04L25/03292 ,  H04L25/03891 ,  H04L25/067

摘要： A receiver in a multiple-input multiple-output (MIMO) system is provided. The receiver includes a channel estimator estimating a channel based on a receiving signal, a minimum mean square error (MMSE) based reciprocal log likelihood ratio (R-LLR) calculator connected with the channel estimator and calculating an R-LLR based on the receiving signal and the estimated channel, and a channel decoder connected with the MMSE based R-LLR calculator and decoding the channel and the receiving signal based on the calculated R-LLR, wherein the R-LLR is calculated based on the reciprocity.

摘要翻译： 提供了一种多输入多输出（MIMO）系统中的接收机。 接收机包括基于接收信号估计信道的信道估计器，与信道估计器连接的基于最小均方误差（MMSE）的倒数似然比（R-LLR）计算器，并基于接收信号计算R-LLR 和估计信道，以及与基于MMSE的R-LLR计算器连接的信道解码器，并且基于所计算的R-LLR对信道和接收信号进行解码，其中基于互易性来计算R-LLR。

公开(公告)号：US20130004185A1

公开(公告)日：2013-01-03

申请号：US13536949

申请日：2012-06-28

申请人： Young Jo BANG ,  Youn Ok Park

发明人： Young Jo BANG ,  Youn Ok Park

IPC分类号： H04B10/00 ,  H04B7/14

CPC分类号： H04B10/278 ,  H04B10/29 ,  H04B10/548

摘要： An optical repeater in a mobile communication system includes a main hub unit (MHU) and a plurality of repeaters connected to a plurality of access points of the MHU, respectively. Each of the repeaters receives subcarrier information and a signal transmitted from a base station, as optical signals, through the MHU or a different repeater connected thereto, processes only a signal corresponding to a subcarrier allocated to a terminal which has accessed according to the subcarrier information, and transmits the processed signal to the terminal which has accessed. Also, each of the repeaters maps a signal of the terminal which has accessed to a subcarrier allocated to the terminal which has accessed, and transmits the same to the MHU or a different repeater connected thereto.

摘要翻译： 移动通信系统中的光中继器分别包括连接到MHU的多个接入点的主集线器单元（MHU）和多个中继器。 每个中继器接收子载波信息，并且从基站发送的信号作为光信号通过MHU或与其连接的不同的中继器，仅处理对应于分配给根据子载波信息访问的终端的子载波的信号 ，并将处理后的信号发送到已访问的终端。 此外，每个中继器将已经访问的终端的信号映射到分配给已经访问的终端的子载波，并将其发送到与其连接的MHU或不同的中继器。