公开(公告)号：US07397866B2

公开(公告)日：2008-07-08

申请号：US10771494

申请日：2004-02-04

申请人： Chan-Soo Hwang ,  Seung-Hoon Nam ,  Jae-Hak Chung ,  Yung-Soo Kim

发明人： Chan-Soo Hwang ,  Seung-Hoon Nam ,  Jae-Hak Chung ,  Yung-Soo Kim

IPC分类号： H03K9/00

CPC分类号： H04L1/0618

摘要： A method and apparatus for transmitting/receiving a differential space-time block code (STBC) by estimating only channel power in a wireless communication system using a plurality of transmission antennas. A receiver for receiving information symbols encoded by a differential STBC before and decoding the received information symbols collects a signal received at a reception antenna from a plurality of transmission antennas for one block duration; calculates a substitution signal by multiplying the received signal by a signal received for a previous block duration; estimates channel power for a channel from the plurality of transmission antennas to the reception antenna; normalizes the estimated channel power with a normalization value determined as a size of previously received symbols; and calculates information symbols by dividing the substitution signal by the normalized channel power.

摘要翻译： 一种通过仅使用多个发送天线估计无线通信系统中的信道功率来发送/接收差分时空块码（STBC）的方法和装置。 用于接收由差分STBC编码的信息符号并且对接收到的信息符号进行解码的接收机在多个发送天线收集在接收天线处接收到的信号一个块持续时间; 通过将接收到的信号乘以在先前块持续时间接收的信号来计算替代信号; 估计从多个发送天线到接收天线的信道的信道功率; 使用被确定为先前接收到的符号的大小的归一化值来对估计的信道功率进行归一化; 并且通过将取代信号除以归一化信道功率来计算信息符号。

公开(公告)号：US07298804B2

公开(公告)日：2007-11-20

申请号：US10692896

申请日：2003-10-24

申请人： Chan-Soo Hwang ,  Seung-Hoon Nam ,  Yung-Soo Kim ,  Jae-Hak Chung

发明人： Chan-Soo Hwang ,  Seung-Hoon Nam ,  Yung-Soo Kim ,  Jae-Hak Chung

IPC分类号： H04B7/10

CPC分类号： H04L1/0054 ,  H04L1/0618

摘要： A receiver for receiving complex symbols in a radio communication system, in which a symbol arranger collects signals from at least three transmitter antennas through at least one receiver antenna over four time intervals; a channel estimator estimates at least three channel gains from the three transmitter antennas to the receiver antenna; first and second decoders each compute metrics for all possible pairs of symbols using the received signals and channel gains, and detect two symbols having a minimum metric; And a P/S (Parallel to Serial) converter arranges the detected symbols in the right order. Each decoder linearly operates the received signals and channel gains, pre-detects two symbols using threshold detection, and outputs the pre-detected symbols as final symbols if the product of the product of the pre-detected symbols and a constant determined by the channel gains is a minimum.

摘要翻译： 一种用于在无线电通信系统中接收复合符号的接收机，其中符号编排器通过至少一个接收天线在四个时间间隔内收集来自至少三个发射机天线的信号; 信道估计器估计从三个发射机天线到接收机天线的至少三个信道增益; 每个解码器使用所接收的信号和信道增益来计算所有可能的符号对的度量，并且检测具有最小度量的两个符号; 并且P / S（并行到串行）转换器以正确的顺序排列检测到的符号。 每个解码器线性地操作接收的信号和信道增益，使用阈值检测来预检测两个符号，并且如果预检测符号的乘积和由信道增益确定的常数的乘积的乘积，则将预检测符号作为最终符号输出 是最小的。

公开(公告)号：US20060093060A1

公开(公告)日：2006-05-04

申请号：US11264186

申请日：2005-11-01

申请人： Young-Ho Jung ,  Jae-Hak Chung ,  Seung-Hoon Nam ,  Won-Il Roh ,  Jeong-Tae Oh ,  Chan-Byoung Chae ,  Kyun-Byoung Ko

发明人： Young-Ho Jung ,  Jae-Hak Chung ,  Seung-Hoon Nam ,  Won-Il Roh ,  Jeong-Tae Oh ,  Chan-Byoung Chae ,  Kyun-Byoung Ko

IPC分类号： H04L1/02

CPC分类号： H04L1/0643 ,  H04L1/0693

摘要： There is provided a Multi-Input Multi-Output (MIMO) communication system including a transmitter for combining at least four transmit antennas according to each of at least two sub-channels, and transmitting space-time-coded signals and at least one receiver for receiving the signals through at least two antennas, wherein the receiver includes an antenna coordination information generator for generating and feeding back optimal transmit antenna coordination information according to said each sub-channel by means of the received signals, and the transmitter includes an antenna coordination controller for controlling coordinations of the transmit antennas according to each sub-channel based on the transmit antenna coordination information fed back from the receiver.

摘要翻译： 提供了一种多输入多输出（MIMO）通信系统，其包括用于根据至少两个子信道中的每一个组合至少四个发射天线的发射机，并且发送空时编码信号和至少一个接收机，用于 通过至少两个天线接收信号，其中所述接收机包括天线协调信息发生器，用于根据所述每个子信道通过所接收的信号产生和反馈最佳发射天线协调信息，并且所述发射机包括天线协调控制器 用于基于从接收机反馈的发送天线协调信息来控制根据每个子信道的发射天线的协调。

公开(公告)号：US20050259566A1

公开(公告)日：2005-11-24

申请号：US10489376

申请日：2002-09-12

申请人： Jae-Hak Chung ,  Yung-Soo Kim ,  Eung-Sun Kim

发明人： Jae-Hak Chung ,  Yung-Soo Kim ,  Eung-Sun Kim

IPC分类号： H04L1/06 ,  H04L25/03 ,  H04L5/04

CPC分类号： H04L25/0204 ,  H03M7/4006 ,  H03M7/46 ,  H04B17/24 ,  H04B17/327 ,  H04L1/0026 ,  H04L1/0029 ,  H04L1/0073 ,  H04L1/06 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0053 ,  H04L5/006 ,  H04L5/0096 ,  H04L25/022 ,  H04L25/025 ,  H04L25/03159 ,  H04L25/03343 ,  H04L27/2607 ,  H04L27/2626 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03802 ,  H04N21/2383 ,  H04N21/4382

摘要： A method and apparatus for transferring channel information in OFDM communications are provided. In the channel information transmission apparatus, a receiving portion includes a prefix remover removing a prefix, attached to the OFDM signal in order to overcome channel fading, from an OFDM signal received from a transmission portion, a fast Fourier transformer transforming a received time domain signal from which the prefix has been removed into a frequency domain signal, a channel measurer extracting a channel value from the frequency region signal obtained by the fast Fourier transformer, a compensator compensating for the output signal of the fast Fourier transformer using the channel value obtained by the channel measurer, a parallel-to-serial converter converting a compensated parallel signal received from the compensator into a serial signal, and a signal processor processing the channel value measured by the channel measurer in order to transmit signal-processed data to the transmission portion.

摘要翻译： 提供了一种用于在OFDM通信中传送信道信息的方法和装置。 在频道信息发送装置中，接收部分包括前缀去除器，其从附加到OFDM信号的OFDM信号中去除从传输部分接收的OFDM信号中克服信道衰落的前缀，快速傅里叶变换器变换接收到的时域信号 将前缀已被移除到频域信号中，信道测量器从由快速傅立叶变换器获得的频域信号中提取信道值，补偿器使用由以下获得的信道值补偿快速傅立叶变换器的输出信号： 信道测量器，将从补偿器接收的补偿并行信号转换为串行信号的并行到串行转换器，以及处理由信道测量器测量的信道值的信号处理器，以将信号处理的数据发送到传输部分 。

公开(公告)号：US20050254477A1

公开(公告)日：2005-11-17

申请号：US11130942

申请日：2005-05-17

申请人： Kyung-Chun Lee ,  Joo-Hwan Chun ,  Jae-Hak Chung ,  Seung-Hoon Nam

发明人： Kyung-Chun Lee ,  Joo-Hwan Chun ,  Jae-Hak Chung ,  Seung-Hoon Nam

IPC分类号： H04B7/04 ,  H04B7/06 ,  H04L1/02 ,  H01Q3/02 ,  H04B7/02

CPC分类号： H04B7/0626 ,  H04B7/0617

摘要： A beamforming method in a communication system having a transmitter for transmitting signals to users on a plurality of transmit antennas, and spatially identifying the users and a plurality of receivers for receiving the signals discriminately. A beamforming weight is determined based on channel information received from each of the receivers, based on whether the each receiver uses a single antenna or a plurality of antennas. A transmission signal is multiplied by the beamforming weight and transmitted.

摘要翻译： 一种通信系统中的波束形成方法，具有用于在多个发射天线上向用户发送信号的发射机，以及空间识别用户和用于接收信号的多个接收机。 基于每个接收机是使用单个天线还是多个天线，基于从每个接收机接收的信道信息来确定波束成形权重。 传输信号乘以波束成形权重并传输。

公开(公告)号：US20050185605A1

公开(公告)日：2005-08-25

申请号：US11035843

申请日：2005-01-14

申请人： Young-Bo Cho ,  Dae-Sik Hong ,  Sang-Min Ro ,  Chan-Soo Hwang ,  Jae-Hak Chung

发明人： Young-Bo Cho ,  Dae-Sik Hong ,  Sang-Min Ro ,  Chan-Soo Hwang ,  Jae-Hak Chung

IPC分类号： H04B1/69 ,  H04B7/216 ,  H04J13/00 ,  H04L5/02 ,  H04L25/02 ,  H04L27/26

CPC分类号： H04L25/0226 ,  H04J13/00 ,  H04L5/0021 ,  H04L5/0048 ,  H04L25/022 ,  H04L27/2613

摘要： A channel estimation method in a wireless communication system based on multicarrier-code division multiple access (MC-CDMA) using frequency interleaving. A transmitter generates transmission symbols using a pilot signal (P) and an inverted pilot signal (−P) according to subcarriers on which spread symbols generated from a spectrum spreading operation are sent, performs an interleaving operation for the transmission symbols in a frequency domain, and transmits a result of the interleaving operation. A receiver extracts the pilot signal (P) and inverted pilot signal (−P) included in the transmission symbols and performs channel estimation.

摘要翻译： 基于使用频率交织的多载波码分多址（MC-CDMA）的无线通信系统中的信道估计方法。 发射机根据从频谱扩展运算产生的扩频符号发送的子载波，使用导频信号（P）和反向导频信号（-P）生成发送符号，对频域中的发送符号进行交织操作， 并发送交织操作的结果。 接收机提取发送符号中包含的导频信号（P）和反向导频信号（-P），进行信道估计。