公开(公告)号：US20110167321A1

公开(公告)日：2011-07-07

申请号：US12809392

申请日：2008-02-29

申请人： Sung-Hyun Hwang ,  Jung Sun Um ,  Myung Sun Song ,  Chang-Joo Kim ,  Se-Bin Im ,  Tae-Woong Yoon ,  Hyung-Jin Choi

发明人： Sung-Hyun Hwang ,  Jung Sun Um ,  Myung Sun Song ,  Chang-Joo Kim ,  Se-Bin Im ,  Tae-Woong Yoon ,  Hyung-Jin Choi

IPC分类号： H04L27/28 ,  H04B17/00 ,  H03M13/23 ,  G06F11/10

CPC分类号： H04L5/0051 ,  H04L25/0224 ,  H04L25/03292 ,  H04L27/2613 ,  H04L27/2647

摘要： A data transmitter and receiver for improving a data rate, and more particularly, to an apparatus and method of transmitting and receiving an orthogonal frequency division multiplexing (OFDM) symbol in which a pilot signal is added to a data signal is provided. The apparatus includes a transmitter including: a pilot adder to add a pilot signal to a data signal; and a guard interval inserting unit to insert a guard interval to the data signal with the added pilot signal, and a receiver including: a guard interval removal unit to remove a guard interval in a received time domain signal; a fast Fourier transform (FFT) unit to transform the time domain signal in which the guard interval is removed to a frequency domain signal; a channel estimator to estimate a channel value from the time domain signal in which the guard interval is removed; an equalizer to equalize the frequency domain signal based on the estimated channel value; and a pilot signal removal unit to remove the pilot signal in the equalized frequency domain signal.

摘要翻译： 提供了一种用于提高数据速率的数据发送器和接收器，更具体地，涉及一种发送和接收其中向数据信号添加导频信号的正交频分复用（OFDM）符号的装置和方法。 该装置包括：发射机，包括：导频加法器，用于将导频信号加到数据信号上; 以及保护间隔插入单元，用于利用所附加的导频信号向所述数据信号插入保护间隔;以及接收机，包括：保护间隔去除单元，用于去除所接收的时域信号中的保护间隔; 快速傅立叶变换（FFT）单元，用于将保护间隔被去除的时域信号变换为频域信号; 信道估计器，用于从保护间隔被去除的时域信号中估计信道值; 均衡器，用于基于估计的信道值来均衡频域信号; 以及导频信号去除单元，用于去除均衡的频域信号中的导频信号。

公开(公告)号：US08379741B2

公开(公告)日：2013-02-19

申请号：US12849758

申请日：2010-08-03

申请人： Hyung-Jin Choi ,  Won-Jun Hwang ,  Se-Bin Im

发明人： Hyung-Jin Choi ,  Won-Jun Hwang ,  Se-Bin Im

IPC分类号： H04K1/10

CPC分类号： H04B7/2606 ,  H04L1/0076 ,  H04L5/003

摘要： Provided are a wireless communication system and a method of performing communication in the same. The wireless communication system includes a terminal configured to classify all subcarriers into a first group and a second group and allocate subcarriers of the first group to first symbols and subcarriers of the second group to the first symbols again to generate and transmit a first transmission signal, a base station configured to allocate the subcarriers of the first group to second symbols and the subcarriers of the second group to third symbols to generate and transmit a second transmission signal, and a relay configured to receive the first and second transmission signals and perform maximum likelihood (ML) determination of frequency domain signals of the first and second transmission signals to estimate the first to third symbols.

摘要翻译： 提供一种无线通信系统和执行通信的方法。 无线通信系统包括终端，其被配置为将所有子载波分类为第一组和第二组，并且将第一组的子载波再次分配给第一组的第一符号和副载波，以再次产生并发送第一传输信号， 基站，被配置为将第一组的子载波分配给第二组的第二符号和第二组的子载波以分配给第三符号，以产生和发送第二传输信号;以及中继器，被配置为接收第一和第二传输信号并执行最大似然 （ML）确定第一和第二传输信号的频域信号以估计第一至第三符号。

公开(公告)号：US20110176583A1

公开(公告)日：2011-07-21

申请号：US12849758

申请日：2010-08-03

申请人： Hyung-Jin Choi ,  Won-Jun Hwang ,  Se-Bin Im

发明人： Hyung-Jin Choi ,  Won-Jun Hwang ,  Se-Bin Im

IPC分类号： H04B7/14

CPC分类号： H04B7/2606 ,  H04L1/0076 ,  H04L5/003

摘要： Provided are a wireless communication system and a method of performing communication in the same. The wireless communication system includes a terminal configured to classify all subcarriers into a first group and a second group and allocate subcarriers of the first group to first symbols and subcarriers of the second group to the first symbols again to generate and transmit a first transmission signal, a base station configured to allocate the subcarriers of the first group to second symbols and the subcarriers of the second group to third symbols to generate and transmit a second transmission signal, and a relay configured to receive the first and second transmission signals and perform maximum likelihood (ML) determination of frequency domain signals of the first and second transmission signals to estimate the first to third symbols.

摘要翻译： 提供一种无线通信系统和执行通信的方法。 无线通信系统包括终端，其被配置为将所有子载波分类为第一组和第二组，并且将第一组的子载波再次分配给第一组的第一符号和副载波，以再次产生并发送第一传输信号， 基站，被配置为将第一组的子载波分配给第二组的第二符号和第二组的子载波以分配给第三符号，以产生和发送第二传输信号;以及中继器，被配置为接收第一和第二传输信号并执行最大似然 （ML）确定第一和第二传输信号的频域信号以估计第一至第三符号。

公开(公告)号：US08681903B2

公开(公告)日：2014-03-25

申请号：US13388848

申请日：2010-08-04

申请人： Hyung-Jin Choi ,  Young-Il Min ,  Se-Bin Im

发明人： Hyung-Jin Choi ,  Young-Il Min ,  Se-Bin Im

IPC分类号： H04L27/06

CPC分类号： H04L27/0012

摘要： Disclosed are a method for demodulating received signals and an apparatus therefore which can maintain quality of signals and can reduce computational complexity. A demodulation method of a receiving device for receiving a plurality of signals modulated through a M-ary (M is a natural number of 1 or more) modulation method includes: comparing channel frequency response power of a first channel with channel frequency response power of a second channel, selecting M reference signals on the basis of the compared result, selecting corresponding signals paired with respective selected M reference signals, and estimating transmitting signals from the M signal pairs including pairs of the reference signal and the corresponding signal. Accordingly, the computational complexity is reduced from O (M2) to O (M).

摘要翻译： 公开了一种用于解调接收信号的方法以及因此可以保持信号质量并且可以降低计算复杂度的装置。 一种用于接收通过M进制调制的多个信号的接收装置的解调方法（M是1或更多的自然数）调制方法包括：将第一信道的信道频率响应功率与信道频率响应功率进行比较， 第二通道，基于比较结果选择M个参考信号，选择与各自选择的M个参考信号配对的相应信号，以及估计来自包括参考信号和相应信号对的M个信号对的发送信号。 因此，计算复杂度从O（M2）减少到O（M）。

公开(公告)号：US08130852B2

公开(公告)日：2012-03-06

申请号：US12345936

申请日：2008-12-30

申请人： Hyung-Jin Choi ,  Se-Bin Im

发明人： Hyung-Jin Choi ,  Se-Bin Im

IPC分类号： H04L27/28

CPC分类号： H04L25/0208 ,  H04L25/0212 ,  H04L25/022 ,  H04L25/0224 ,  H04L25/03159 ,  H04L2025/03414 ,  H04L2025/03611

摘要： Disclosed is a radio communication device, and more particularly to a method for estimating a channel and compensating for error occurring in the estimation procedure, for a device for performing a frequency domain signal processing, such as Orthogonal Frequency Division Multiplexing (OFDM) The channel estimation method in a radio communication system includes the steps of: transforming a received OFDM signal into a frequency domain; estimating a channel frequency response (CFR) value from a result value obtained through the transformation by using a pilot signal; transforming the estimated CFR value into a time domain through an extended Inverse Fast Fourier Transform scheme, and detecting a channel impulse response (CIR) value; detecting a delay path position of a channel; modifying a non-ideal autocorrelation function; and compensating the estimated CIR value for error, through use of the detected delay path position and the non-ideal autocorrelation function.

摘要翻译： 公开了一种无线电通信装置，更具体地，涉及用于估计信道并补偿估计过程中出现的误差的方法，用于执行频域信号处理的装置，例如正交频分复用（OFDM）信道估计 无线电通信系统中的方法包括以下步骤：将接收到的OFDM信号变换为频域; 通过使用导频信号从通过变换获得的结果值估计信道频率响应（CFR）值; 通过扩展的快速傅立叶逆变换方案将估计的CFR值变换为时域，并检测信道脉冲响应（CIR）值; 检测通道的延迟路径位置; 修改非理想自相关函数; 并通过使用检测到的延迟路径位置和非理想自相关函数来补偿估计的CIR误差值。

公开(公告)号：US08351550B2

公开(公告)日：2013-01-08

申请号：US12363484

申请日：2009-01-30

申请人： Hee-Jin Roh ,  Jeoung-Gil Lee ,  Su-Jin Yoon ,  Hoon Kang ,  Chang-Hyun Baik ,  Jun-Kyu Kang ,  Hyung-Jin Choi ,  Se-Bin Im ,  Dae-Hong Lee

发明人： Hee-Jin Roh ,  Jeoung-Gil Lee ,  Su-Jin Yoon ,  Hoon Kang ,  Chang-Hyun Baik ,  Jun-Kyu Kang ,  Hyung-Jin Choi ,  Se-Bin Im ,  Dae-Hong Lee

IPC分类号： H03D1/00

CPC分类号： H04L27/2688 ,  H04L27/2659 ,  H04L27/2672 ,  H04L27/2675

摘要： A correlation apparatus and method for frequency synchronization are provided. A frequency synchronization method of a receiver in a broadband wireless access communication system includes acquiring a highest correlation value by conducting a differential correlation of a variable interval between a received signal and a reference signal and performing a frequency synchronization according to the highest correlation value.

摘要翻译： 提供了一种用于频率同步的相关装置和方法。 宽带无线接入通信系统中的接收机的频率同步方法包括通过对接收信号和参考信号进行可变间隔的差分相关，并根据最高相关值进行频率同步来获取最高相关值。

公开(公告)号：US20120134453A1

公开(公告)日：2012-05-31

申请号：US13388848

申请日：2010-08-04

申请人： Hyung-Jin Choi ,  Young-Il Min ,  Se-Bin Im

发明人： Hyung-Jin Choi ,  Young-Il Min ,  Se-Bin Im

IPC分类号： H04L27/06

CPC分类号： H04L27/0012

摘要： Disclosed are a method for demodulating received signals and an apparatus therefore which can maintain quality of signals and can reduce computational complexity. A demodulation method of a receiving device for receiving a plurality of signals modulated through a M-ary (M is a natural number of 1 or more) modulation method includes: comparing channel frequency response power of a first channel with channel frequency response power of a second channel, selecting M reference signals on the basis of the compared result, selecting corresponding signals paired with respective selected M reference signals, and estimating transmitting signals from the M signal pairs including pairs of the reference signal and the corresponding signal. Accordingly, the computational complexity is reduced from O (M2) to O (M).

摘要翻译： 公开了一种用于解调接收信号的方法以及因此可以保持信号质量并且可以降低计算复杂度的装置。 一种用于接收通过M进制调制的多个信号的接收装置的解调方法（M是1或更多的自然数）调制方法包括：将第一信道的信道频率响应功率与信道频率响应功率进行比较， 第二通道，基于比较结果选择M个参考信号，选择与各自选择的M个参考信号配对的相应信号，以及估计来自包括参考信号和相应信号对的M个信号对的发送信号。 因此，计算复杂度从O（M2）减少到O（M）。

公开(公告)号：US09930550B2

公开(公告)日：2018-03-27

申请号：US14978692

申请日：2015-12-22

申请人： Se-Bin Im ,  Min-Goo Kim ,  Sung-Soo Kim ,  Chae-Hag Yi

发明人： Se-Bin Im ,  Min-Goo Kim ,  Sung-Soo Kim ,  Chae-Hag Yi

IPC分类号： H04L1/00 ,  H04W24/08 ,  H04W72/12

CPC分类号： H04W24/08 ,  H04W72/1247

摘要： A method and apparatus for controlling a modem of a user equipment (UE) in a wireless communication system is provided. The method includes generating at least one modem control information determined based on information related to a wireless communication environment, when at least a portion of the wireless communication environment is changed, updating a priority stored in a database of the UE based on the changed wireless communication environment and controlling the modem of the UE using the priority-updated modem control information.