公开(公告)号：US06570864B1

公开(公告)日：2003-05-27

申请号：US09441611

申请日：1999-11-16

申请人： Seong-Rag Kim ,  Young-Gyun Jeong ,  Nam-Jin Park ,  In-Kyeong Choi

发明人： Seong-Rag Kim ,  Young-Gyun Jeong ,  Nam-Jin Park ,  In-Kyeong Choi

IPC分类号： H04Q720

CPC分类号： H04B1/71055 ,  H04B2201/70701

摘要： A method for canceling an interference signal by using a parallel multi-stage structure in a code division multiple access (CDMA) system, includes the steps of: a) delaying a receiving signal; b) receiving and predicting data and channel parameter from the individual user; c) regenerating the interference signal of the individual user by using the data and the channel parameter predicted by the multiple receiving and predicting; and d) canceling all the interference signals delayed and transferred through the delaying by the interference signal regenerated through the multiple interference regeneration.

摘要翻译： 一种通过在码分多址（CDMA）系统中使用并行多级结构来消除干扰信号的方法，包括以下步骤：a）延迟接收信号; b）从个人用户接收和预测数据和信道参数; c）通过使用由多个接收和预测预测的数据和信道参数来再生个体用户的干扰信号; 以及d）通过由多重干扰再生产生的干扰信号通过延迟来消除延迟和传输的所有干扰信号。

公开(公告)号：US06570863B1

公开(公告)日：2003-05-27

申请号：US09441382

申请日：1999-11-16

申请人： Seong-Rag Kim ,  Young-Gyun Jeong ,  In-Kyeong Choi ,  Seo-Young Lee

发明人： Seong-Rag Kim ,  Young-Gyun Jeong ,  In-Kyeong Choi ,  Seo-Young Lee

IPC分类号： H04B7216

CPC分类号： H04B1/7097

摘要： An adaptive apparatus and method for detecting a receiving signal employing constrained minimum mean square error (MMSE) criterion as an adaptive algorithm for detecting CDMA receiving signal. The apparatus comprises an adaptive filtering means; a channel estimating means; a signal restoring means; a selecting means; a reference signal generating means; an error calculating means; and a tap weight controlling means. In the apparatus, an adaptive filter can be normally operated even if compensating a phase and amplitude of a channel at the same time.

摘要翻译： 一种用于使用受限最小均方误差（MMSE）准则检测接收信号作为检测CDMA接收信号的自适应算法的自适应装置和方法。 该装置包括自适应滤波装置; 信道估计装置; 信号恢复装置; 选择手段; 参考信号发生装置; 误差计算装置; 和抽头重量控制装置。 在该装置中，即使在同时补偿信道的相位和幅度，自适应滤波器也可以正常工作。

公开(公告)号：US07075916B2

公开(公告)日：2006-07-11

申请号：US09930217

申请日：2001-08-16

申请人： Young Wha Kim ,  Seong Rag Kim ,  In-Kyeong Choi

发明人： Young Wha Kim ,  Seong Rag Kim ,  In-Kyeong Choi

IPC分类号： H04B7/216

CPC分类号： H04B1/71075

摘要： The present invention relates to a receiver applicable to a code division multiple access system having multiple transfer rates. In a CDMA system, when performing a de-spreading process to extract information from received data in which various terminal signals or multiple path signals are asynchronously mixed, interference between a plurality of users or paths tends to occur. The present invention proposes an interference canceller for effectively canceling the interference between the users or paths. For this, the present invention implements a parallel interference canceller for estimating in parallel interference signals from asynchronously received signals and canceling the estimated interference signals from the received signals. In the present invention, when implementing a parallel interference canceller for asynchronously received signals, as bit information of the received signals is not aligned in the same time frame, the following conditions are considered. First, the accuracy of interference cancellation is maintained. Second, the time delay of signal processing is minimized to minimize the time delay of the entire system. In the present invention, in order to achieve these objects, reproduction of interference signals and the subtraction operation are optimized based on the arrival points and end points based of the fastest signal and the latest signal among the asynchronously received signals.

公开(公告)号：US07634030B2

公开(公告)日：2009-12-15

申请号：US10334634

申请日：2002-12-31

申请人： Seong Rag Kim ,  Young Ho Jung ,  In-Kyeong Choi ,  Yong Hoon Lee

发明人： Seong Rag Kim ,  Young Ho Jung ,  In-Kyeong Choi ,  Yong Hoon Lee

IPC分类号： H04L27/06

CPC分类号： H04B7/0413 ,  H04B7/0613 ,  H04B7/0851 ,  H04B7/0854

摘要： A transmission apparatus for a DS/CDMA system including a multiple-input multiple output MIMO antenna system is disclosed. The apparatus includes a transmitter for transmitting data by applying a different scramble code to each transmitted data through a plurality of transmitting antennas. The apparatus also includes a receiver for receiving the transmitted data by obtaining a diversity gain based on the maximum order of the diversity in order to effectively detect the data. The present invention achieves an excellent detection performance by receiving data with a full order of diversity, which is a multiple of the number of receiving antennas and the number of multipath, without complicated operation such as a decision feed equalizer.

摘要翻译： 公开了一种包括多输入多输出MIMO天线系统的DS / CDMA系统的发送装置。 该装置包括：发射机，用于通过多个发射天线向每个发送的数据应用不同的密码来发送数据。 该装置还包括接收器，用于通过基于分集的最大顺序获得分集增益来接收所发送的数据，以便有效地检测数据。 本发明通过以分集的全部数量接收数据来实现优异的检测性能，分集数是接收天线的数量和多径的数量，而无需诸如决策馈送均衡器的复杂操作。

公开(公告)号：US20090067513A1

公开(公告)日：2009-03-12

申请号：US11579722

申请日：2004-11-10

申请人： Seong-Rag Kim ,  In-Kyeong Choi ,  Dong-Seung Kwon ,  Seung-Ku Hwang

发明人： Seong-Rag Kim ,  In-Kyeong Choi ,  Dong-Seung Kwon ,  Seung-Ku Hwang

IPC分类号： H04L27/28 ,  H04J11/00

CPC分类号： H04B7/0413 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/086 ,  H04L5/023 ,  H04L5/1484 ,  H04L25/0228 ,  H04L25/0248 ,  H04L27/2647

摘要： A mobile station transmitting and receiving method and a corresponding mobile station transmitter and receiver of a smart antenna system for forming uplink eigenbeams of the OFDM/TDD (orthogonal frequency division multiplex/time division duplex), wherein OFDM symbols are received from a base station through a downlink via multiple antennas (250) and an FFT (fast Fourier transform) is performed on the received OFDM symbols by the FFT units (270). By means of a channel estimator (290) the channels are estimated and a beam weight generator (310) generates respective beam weights from the channels of the respective pilot tones of the respective subcarriers according to the channel estimation result. A beam weight multiplier (230) forms the uplink beam by multiplying the respective beam weights with the output of the signal repeater (220) and IFFT units (240) generate respective OFDM symbols which are transmitted via multiple antennas (250) through an uplink.

摘要翻译： 一种用于形成OFDM / TDD（正交频分复用/时分双工）的上行固有光束的智能天线系统的移动台发射和接收方法和相应的移动台发射机和接收机，其中从基站通过 通过FFT单元（270）对所接收的OFDM符号执行经由多个天线（250）和FFT（快速傅里叶变换）的下行链路。 通过信道估计器（290），估计信道，并且波束权重发生器（310）根据信道估计结果从相应子载波的相应导频音调的信道生成相应的波束权重。 波束权重乘法器（230）通过将各个波束权重与信号中继器（220）的输出相乘来形成上行链路波束，并且IFFT单元（240）生成经由多个天线（250）经由上行链路发送的各个OFDM符号。

公开(公告)号：US20080240276A1

公开(公告)日：2008-10-02

申请号：US11667711

申请日：2005-08-10

申请人： Young-Seog Song ,  Seong-Rag Kim ,  In-Kyeong Choi ,  Choong-ll Yeh ,  Seung-Joon Lee ,  Hyoung-Soo Lim ,  Kwang-Jae Lim ,  Yu-Ro Lee ,  Jong-Ee Oh ,  Dong-Seung Kwon ,  Seung-Ku Hwang ,  Chung-Yong Lee ,  Myeong-Cheol Shin

发明人： Young-Seog Song ,  Seong-Rag Kim ,  In-Kyeong Choi ,  Choong-ll Yeh ,  Seung-Joon Lee ,  Hyoung-Soo Lim ,  Kwang-Jae Lim ,  Yu-Ro Lee ,  Jong-Ee Oh ,  Dong-Seung Kwon ,  Seung-Ku Hwang ,  Chung-Yong Lee ,  Myeong-Cheol Shin

IPC分类号： H04L5/12 ,  H04L27/28

CPC分类号： H04B7/061 ,  H04B7/0669 ,  H04B7/0691 ,  H04B7/08 ,  H04L1/0003 ,  H04L1/0637 ,  H04L1/0675

摘要： The present invention relates to a multi-input multi-output (MIMO) system for enhancing transmission performance. The MIMO system uses space-time encoding and transmit antenna selection methods, and includes a transmitter (100) and a receiver (200). The transmitter (100) includes N transmit antennas (130-1, 130-4) that are more than M tansrni antennas (130-1, 130-3) used for transmitting a signal to space channel, selects the M transmit antennas (130-1, 130-3) among the N transmit antennas (130-3 130-4), and transmits symbol by space-time encoding the symbol. The receiver (200) includes M receive antenna (120-1, 210-2) for receiving a signal from the space channel, detects an information symbol by using the signal received through the receive antenna (210-1, 210-2), generates transmit antenna selection information for selecting M transmit antennas (130-1, 130-3) among transmit antennas (i30-1, . . . 7130-4) with reference to a channel estimate, and returns the information to the transmitter.

摘要翻译： 本发明涉及用于增强传输性能的多输入多输出（MIMO）系统。 MIMO系统使用时空编码和发射天线选择方法，并且包括发射机（100）和接收机（200）。 发射机（100）包括比用于将信号发射到空间信道的M多个天线（130-1,30-3）多的N个发射天线（130-1,140-4），选择M个发射天线（130 -1,130-3），并且通过对该符号进行时空编码来发送符号。 接收器（200）包括用于从空间信道接收信号的M个接收天线（120-1,210-2），通过使用通过接收天线（210-1,210-2）接收的信号来检测信息符号， 生成用于参考信道估计在发射天线（i 30-1，...，7130-4）中选择M个发射天线（130-1,130-3）的发射天线选择信息，并将该信息返回给发射机。

公开(公告)号：US07872963B2

公开(公告)日：2011-01-18

申请号：US10584641

申请日：2004-11-25

申请人： In-Kyeong Choi ,  Seong-Rag Kim ,  Dong-Seung Kwon ,  Jin-Ho Choi

发明人： In-Kyeong Choi ,  Seong-Rag Kim ,  Dong-Seung Kwon ,  Jin-Ho Choi

IPC分类号： H04J11/00

CPC分类号： H04L27/2626 ,  H04B7/0417 ,  H04B7/0634 ,  H04B7/065 ,  H04B7/066 ,  H04L1/06 ,  H04L1/0693 ,  H04L25/03343 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03426

摘要： Disclosed is a MIMO-OFDM system, wherein the transmitter comprises a serial/parallel converter for converting continuously inputted symbols of the number of subcarriers to K parallel signals; a signal reproducer for reproducing K parallel signals by the number of transmit antennas L an eigenmode generator for generating eigenbeam of the reproduced signals outputted from the signal reproducer at each subcarrier, on the basis of Nf eigenbeam forming vectors which are fed back long-term and information of a best eigenbeam forming vector at each subcarrier which is fed back short-term, through the feedback device; and a plurality of inverse Fourier converters for receiving the signals outputted from the eigenmode generator and generating an OFDM symbol.

摘要翻译： 公开了一种MIMO-OFDM系统，其中发射机包括串行/并行转换器，用于将连续输入的子载波数量的符号转换为K个并行信号; 信号再现器，用于根据发射天线L的数量再现K个并行信号，该天线本体模型发生器用于在每个子载波上从信号再现器输出的再生信号的本征波束，基于长期反馈的Nf本征波束形成向量， 通过反馈装置在短时间反馈的每个子载波处的最佳特征波束形成矢量的信息; 以及多个逆傅里叶变换器，用于接收从本征模式发生器输出的信号并产生OFDM符号。

公开(公告)号：US20100215085A1

公开(公告)日：2010-08-26

申请号：US11721110

申请日：2005-12-09

申请人： Seung-Joon Lee ,  Dong-Seung Kwon ,  Seong-Rag Kim ,  In-Kyeong Choi

发明人： Seung-Joon Lee ,  Dong-Seung Kwon ,  Seong-Rag Kim ,  In-Kyeong Choi

IPC分类号： H04B1/38 ,  H04L27/00

CPC分类号： H04L25/0208 ,  H04L1/0631 ,  H04L1/0668

摘要： A receiver according to an exemplary embodiment of the present invention receives a transmitted signal, converts the signal to a predetermined symbol, and estimates channel information including a channel gain of a channel of the transmitted signal. In addition, the receiver generates an intermediate processing value for decoding the signal based on the estimated channel information and the symbol, and normalizes the intermediate processing value to the channel gain to generate a reference value. The generated reference value is used for a soft-decision value for decoding the signal. In addition, when the signal is decoded by using a hard-decision value, a constellation point value that is closest to the reference values is generated and set as the hard-decision value.

摘要翻译： 根据本发明的示例性实施例的接收机接收发送信号，将该信号转换成预定符号，并且估计包括发送信号的信道的信道增益的信道信息。 此外，接收器基于估计的信道信息和符号生成用于对信号进行解码的中间处理值，并且将中间处理值归一化为信道增益以生成参考值。 生成的参考值用于解码信号的软判决值。 此外，当通过使用硬判决值来解码信号时，生成最接近参考值的星座点值并将其设置为硬判定值。

公开(公告)号：US07263118B2

公开(公告)日：2007-08-28

申请号：US10331783

申请日：2002-12-31

申请人： In-Kyeong Choi ,  Seong-Rag Kim ,  Jin-Kyu Choi

发明人： In-Kyeong Choi ,  Seong-Rag Kim ,  Jin-Kyu Choi

IPC分类号： H04L27/30

CPC分类号： H04B1/71075 ,  H04B1/71072 ,  H04B1/7117 ,  H04B1/712 ,  H04B17/336

摘要： An interference canceller is herein disclosed wherein a baseband signal is input to a detector's fingers, and the fingers detect multi-path signals and estimate the baseband signal's channel. An MRC uses the finger's despread signal and the channel estimate to output a soft bit decision value, while a signal regenerator uses a hard bit decision value and the finger's channel estimate to regenerate the baseband signal. An SIR measurer uses a soft bit decision value and a despreader's channel estimate to measure an SIR. A signal selector compares each detector's SIR measurement value with a target SIR, and when the SIR measurement value is greater than the target SIR, it selects the detector's regeneration signal to group received signals. A subtractor subtracts the regeneration signal from the baseband signal.

摘要翻译： 这里公开了一种干扰消除器，其中将基带信号输入到检测器的手指，并且手指检测多路径信号并估计基带信号的信道。 MRC使用手指的解扩信号和信道估计来输出软比特判定值，而信号再生器使用硬比特判定值和手指的信道估计来重新生成基带信号。 SIR测量器使用软比特判定值和解扩器的信道估计来测量SIR。 信号选择器将每个检测器的SIR测量值与目标SIR进行比较，并且当SIR测量值大于目标SIR时，它选择检测器的再生信号以对接收到的信号进行分组。 减法器从基带信号中减去再生信号。

公开(公告)号：US20070177681A1

公开(公告)日：2007-08-02

申请号：US10584641

申请日：2004-11-25

申请人： In-Kyeong Choi ,  Seong-Rag Kim ,  Dong-Seung Kwon ,  Jin-Ho Choi

发明人： In-Kyeong Choi ,  Seong-Rag Kim ,  Dong-Seung Kwon ,  Jin-Ho Choi

IPC分类号： H04L27/00 ,  H04K1/10 ,  H04L27/28

CPC分类号： H04L27/2626 ,  H04B7/0417 ,  H04B7/0634 ,  H04B7/065 ,  H04B7/066 ,  H04L1/06 ,  H04L1/0693 ,  H04L25/03343 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03426

摘要： Disclosed is a MIMO-OFDM system, wherein the transmitter comprises a serial/parallel converter for converting continuously inputted symbols of the number of subcarriers to K parallel signals; a signal reproducer for reproducing K parallel signals by the number of transmit antennas L an eigenmode generator for generating eigenbeam of the reproduced signals outputted from the signal reproducer at each subcarrier, on the basis of Nf eigenbeam forming vectors which are fed back long-term and information of a best eigenbeam forming vector at each subcarrier which is fed back short-term, through the feedback device; and a plurality of inverse Fourier converters for receiving the signals outputted from the eigenmode generator and generating an OFDM symbol.

摘要翻译： 公开了一种MIMO-OFDM系统，其中发射机包括串行/并行转换器，用于将连续输入的子载波数量的符号转换为K个并行信号; 信号再现器，用于根据发射天线L的数量再现K个并行信号，该天线本体模型发生器用于在每个子载波上从信号再现器输出的再生信号的本征波束，基于长期反馈的Nf本征波束形成向量， 通过反馈装置在短时间反馈的每个子载波处的最佳特征波束形成矢量的信息; 以及多个逆傅里叶变换器，用于接收从本征模式发生器输出的信号并产生OFDM符号。