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1. 发明授权

US07158557B2 Channel estimation apparatus and method 有权
标题翻译：信道估计装置及方法
公开(公告)号：US07158557B2
公开(公告)日：2007-01-02
申请号：US10132800
申请日：2002-04-25
申请人： Young-Yong Lee , Kwang-Seog Bae , Jae-Min Ahn , Min-Joong Rim , Hyung-Jin Choi
发明人： Young-Yong Lee , Kwang-Seog Bae , Jae-Min Ahn , Min-Joong Rim , Hyung-Jin Choi
IPC分类号： H04B1/707
CPC分类号： H04W52/228 , H04B1/707 , H04B2201/70701 , H04L25/0232 , H04W52/08 , H04W52/223 , H04W52/225 , H04W52/58
摘要： There is provided a channel estimation apparatus for estimating a radio channel environment by multiplying a currently received bit signal of a pilot signal and previously received bit signals by weights, and summing the weighted currently received bit signal and the weighted previously received bit signals in a CDMA mobile communication system receiving the pilot signal comprised of a stream of bits having given bit values, and a power control signal comprised of power control bits. In the channel estimation, a predictor predicts a next bit signal succeeding the currently received bit signal, multiplies the predicted next bit signal by a weight, and generates a weighted next bit signal. A summer sums the weighted next bit signal from the predictor, the weighted currently received bit signal and the previously received bit signals.
摘要翻译：提供了一种信道估计装置，用于通过将导频信号的当前接收的比特信号和先前接收的比特信号乘以加权来估计无线电信道环境，并将加权的当前接收的比特信号和加权的先前接收的比特信号相加在CDMA 接收由具有给定位值的比特流组成的导频信号的移动通信系统以及由功率控制比特组成的功率控制信号。在信道估计中，预测器预测当前接收到的比特信号之后的下一比特信号，将预测的下一比特信号乘以加权，并产生加权的下一比特信号。加法器将来自预测器的加权的下一位信号，加权的当前接收的位信号和先前接收的位信号相加。

2. 发明授权

US5751734A Decoding method and apparatus using trace deletion for Viterbi algorithm 失效
标题翻译：使用维特比算法的跟踪删除的解码方法和装置
公开(公告)号：US5751734A
公开(公告)日：1998-05-12
申请号：US742663
申请日：1996-11-04
申请人： Hyung-Jin Choi , Sung-Bae Cho , Suk-Jin Jung , Hyung-Kil Lee
发明人： Hyung-Jin Choi , Sung-Bae Cho , Suk-Jin Jung , Hyung-Kil Lee
IPC分类号： H03M13/41 , G06F11/10
CPC分类号： H03M13/4161
摘要： A decoding apparatus for decoding input data using a Viterbi algorithm includes a first unit for repetitively performing determination of a survivor path corresponding to each state at each time unit based on the input data and a Trellis diagram, and for generating decision vectors and path number information whenever a branch path is determined. A second unit is provided for storing the decision vectors generated in the first unit and for outputting path information representing each survivor path determined by the stored decision vectors. A third unit stores the path number information output from the first unit and the path information output from the second unit, and deletes the branch path information corresponding to the path number information of the first unit from the stored path information, while retracing the previous states during the time when the branch path to be deleted does not overlap the other survivor path having a branch path connected to the next state. The third unit generates decoded data corresponding to input data based on the finally remaining survivor path.
摘要翻译：使用维特比算法解码输入数据的解码装置包括：第一单元，用于基于输入数据和网格图重复地执行与每个时间单位的每个状态对应的幸存路径的确定，并且用于生成决策向量和路径号信息每当确定分支路径时。第二单元被提供用于存储在第一单元中生成的判决向量，并且用于输出表示由存储的决策向量确定的每个幸存路径的路径信息。第三单元存储从第一单元输出的路径号信息和从第二单元输出的路径信息，并且从所存储的路径信息中删除与所述第一单元的路径号信息对应的分支路径信息，同时还原先前状态在要删除的分支路径不与具有连接到下一状态的分支路径的另一个幸存路径重叠的时间期间。第三单元基于最终剩余的幸存路径生成与输入数据相对应的解码数据。

3. 发明授权

US08379741B2 Wireless communication system and method for performing communication in the wireless communication system 有权
标题翻译：用于在无线通信系统中执行通信的无线通信系统和方法
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。

4. 发明申请

US20110176583A1 WIRELESS COMMUNICATION SYSTEM AND METHOD FOR PERFORMING COMMUNICATION IN THE WIRELESS COMMUNICATION SYSTEM 有权
标题翻译：无线通信系统和无线通信系统中通信的方法
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。

5. 发明授权

US07711041B2 Signal-to-interference ratio estimation 有权
标题翻译：信号与干扰比估计
公开(公告)号：US07711041B2
公开(公告)日：2010-05-04
申请号：US11254855
申请日：2005-10-21
申请人： Joo-Hyun Do , Hyung-Jin Choi , Jung-Su Han , Jae-Bum Cho
发明人： Joo-Hyun Do , Hyung-Jin Choi , Jung-Su Han , Jae-Bum Cho
IPC分类号： H04B1/38 , H04L5/16
CPC分类号： H04B17/336
摘要： In a method of estimating a signal-to-interference ratio (SIR), a first average channel power per slot of a first channel that is under a fading environment is estimated. A second average channel power per slot of a second channel that is under a fading environment substantially the same as the first channel is estimated, wherein the first and second channels are multiplexed. A second signal power attenuation ratio of the second channel is calculated using the second average power per slot of the second channel. A third average power per slot of the first channel is calculated using the first average power per slot of the first channel and a reciprocal of the second signal power attenuation ratio of the second channel.
摘要翻译：在估计信号干扰比（SIR）的方法中，估计处于衰落环境下的第一信道的每个时隙的第一平均信道功率。估计在与第一信道基本相同的衰落环境下的第二信道的每时隙的第二平均信道功率，其中第一和第二信道被多路复用。使用第二通道的每个槽的第二平均功率来计算第二通道的第二信号功率衰减比。使用第一信道的每个时隙的第一平均功率和第二信道的第二信号功率衰减比的倒数来计算第一信道的每个时隙的第三平均功率。

6. 发明授权

US06964007B2 Asymmetric error correction apparatus and method, and clock recovering apparatus for optical reading system employing the same 失效
标题翻译：非对称误差校正装置和方法以及采用该方法的光学读取系统的时钟恢复装置
公开(公告)号：US06964007B2
公开(公告)日：2005-11-08
申请号：US10215201
申请日：2002-08-09
申请人： Jung-Hyun Lee , Seok-Jun Ko , Pan-Soo Kim , Hyung-Jin Choi
发明人： Jung-Hyun Lee , Seok-Jun Ko , Pan-Soo Kim , Hyung-Jin Choi
IPC分类号： G11B20/18 , G11B20/10 , H04L7/033 , H04L25/06 , G06F11/00 , H03M13/03
CPC分类号： G11B20/10203 , G11B20/10037 , G11B20/10222 , H04L7/0334 , H04L25/069
摘要： An asymmetric error correction apparatus and method, and clock recovering apparatus and data recovering apparatus for a system for reading data from an optical recording medium such as a CD or DVD that has a multi-level input signal and irregular characteristic of zero-crossing transition. The signal inputted from the optical recording medium is digitized, and a zero-crossing detector extracts four sequential samples and detects a zero-crossing point from the two intermediate samples. An asymmetric error detector judges an asymmetric state and asymmetric polarity of the digital signal from a sum of the two side samples among the four samples if the zero-crossing point is detected. A correction section accumulates the judged asymmetric polarities, judges an asymmetric error of the digital signal if the accumulated value exceeds a predetermined threshold, and corrects the asymmetric error of the read signal caused by an inaccurate pit length.
摘要翻译：一种不对称误差校正装置和方法，以及用于从具有多电平输入信号和不均匀过零转换特性的诸如CD或DVD的光记录介质读取数据的系统的时钟恢复装置和数据恢复装置。从光记录介质输入的信号被数字化，并且过零检测器提取四个连续采样并检测来自两个中间采样的过零点。如果检测到过零点，则不对称误差检测器从四个样本中的两个侧样本的和来判断数字信号的不对称状态和非对称极性。如果累积值超过预定阈值，则校正部分累积所判断的非对称极性，判断数字信号的不对称误差，并校正由不准确的凹坑长度引起的读取信号的不对称误差。

7. 发明授权

US08681903B2 Method for demodulating received signals and apparatus for performing the same 有权
标题翻译：解调接收信号的方法及其执行方法
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）。

8. 发明授权

US08130852B2 Method for estimating channel in radio communication system and device therefor 有权
标题翻译：用于估计无线电通信系统中的信道的方法及其装置
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。

9. 发明申请

US20110167321A1 APPARATUS AND METHOD OF TRANSMITTING AND RECEIVING DATA FOR IMPROVING TRANSMISSION RATE 审中-公开
标题翻译：发送和接收数据以提高传输速率的装置和方法
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。

10. 发明授权

US07539166B2 Channel estimator, demodulator, speed estimator and method thereof 有权
标题翻译：信道估计器，解调器，速度估计器及其方法
公开(公告)号：US07539166B2
公开(公告)日：2009-05-26
申请号：US11240628
申请日：2005-10-03
申请人： Joo-Hyun Do , Hyung-Jin Choi , Sung-Jun Kim , Kil-Hyen Ryu
发明人： Joo-Hyun Do , Hyung-Jin Choi , Sung-Jun Kim , Kil-Hyen Ryu
IPC分类号： H04B7/216
CPC分类号： H04L25/0212 , H04L25/0222 , H04L25/0224
摘要： A channel estimator, demodulator, speed estimator and method thereof. The speed estimator may generate a speed indicator indicating a speed of a mobile device. The channel estimator may perform channel estimation based on the estimated speed indicated by the speed indicator. The demodulator may perform channel compensation based on the channel estimation performed by the channel estimator.
摘要翻译：信道估计器，解调器，速度估计器及其方法。速度估计器可以生成指示移动设备的速度的速度指示符。信道估计器可以基于由速度指示器指示的估计速度来执行信道估计。解调器可以基于由信道估计器执行的信道估计来执行信道补偿。

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