公开(公告)号：US06865219B2

公开(公告)日：2005-03-08

申请号：US09872276

申请日：2001-05-31

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

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

IPC分类号： H04B1/7107 ,  H04B15/00

CPC分类号： H04B1/7107

摘要： An apparatus and method for performing circular group-wise parallel interference cancellation in a multi-rate DS-CDMA system that reduce the multiple access interference in a CDMA system are disclosed. The invention provide a method of grouping received signals, which improves the interference cancellation efficiency of the signal receiver. The method of the invention groups a plurality of signals according to the magnitude of signals, and sequentially performs interference cancellation with respect to the groups in order of the signal magnitude. The apparatus and method determine the signal rank by using both the power estimation value of the received signal of each finger and the soft bit decision value being the output value of the maximal ratio combiner, perform grouping of the fingers selected by a finger selector, and finally perform interference cancellation. The soft bit decision value is independent of channel, and has the bit information at the time of signal transmission. Accordingly, this soft bit decision value is employed along with the power estimation value of the received signal, to allow more accurate grouping of signals.

摘要翻译： 公开了一种用于在减少CDMA系统中的多址干扰的多速率DS-CDMA系统中执行循环分组并行干扰消除的装置和方法。 本发明提供了一种对接收信号进行分组的方法，其提高了信号接收机的干扰消除效率。 本发明的方法根据信号的幅度对多个信号进行分组，并按照信号幅度的顺序依次执行干扰消除。 该装置和方法通过使用每个手指的接收信号的功率估计值和作为最大比组合器的输出值的软比特决定值两者来确定信号等级，执行由手指选择器选择的手指的分组，以及 最后执行干扰消除。 软比特决定值与信道无关，并且在信号传输时具有位信息。 因此，该软比特决定值与接收信号的功率估计值一起被采用，以允许信号的更准确的分组。

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：US07027491B2

公开(公告)日：2006-04-11

申请号：US10022731

申请日：2001-12-20

申请人： In-Kyeong Choi ,  Seong Rag Kim

发明人： In-Kyeong Choi ,  Seong Rag Kim

IPC分类号： H04B1/69 ,  H04B1/707 ,  H04B1/713

CPC分类号： H04B1/71075

摘要： An interference cancellation receiver reduces the multiple access interference in a CDMA system. The receiver includes a demodulator for receiving a residual signal or a received signal from a calling terminal as an over-sample unit baseband spread signal and down-sampling the baseband spread signal on a chip basis to output a demodulation signal, a regenerator for performing a bit decision for the demodulation signal, regenerating signals through the channelization and scrambling and converting the regenerated signals to signals on the over-sample basis, an adder for summing up the over-sample unit signals, a filter for filtering the summed-up signal to output a band spread signal, a subtractor for subtracting the band spread signal from the received signal to output the residual signal and a delay for keeping timing with the residual signal by delaying the chip unit signals outputted from the regenerator.

公开(公告)号：US06741634B1

公开(公告)日：2004-05-25

申请号：US09491079

申请日：2000-01-21

申请人： Seong Rag Kim ,  Sugbong Kang ,  In Kyeong Choi ,  Jeong Goo Lee

发明人： Seong Rag Kim ,  Sugbong Kang ,  In Kyeong Choi ,  Jeong Goo Lee

IPC分类号： H04L2730

CPC分类号： H04L25/03057 ,  H04L2025/03414 ,  H04L2025/03611

摘要： An adaptive weighted parallel interference cancellation system for CDMA that decreases MAI (multiple access interference) and thereby increases general performance, including K stages for iterative cancellation of MAI in a received signal of a user. Each stage includes a detector, a regenerator, and a subtractor. The detector is configured to determine a tentative bit decision from a despread signal. The regenerator that is connected with the detector in parallel is configured to spread an unmodulated signal, multiply a channel phase, and multiply by the output of the detector. The subtractor uses weighted signals that are adjusted user by user and according to changing environments.

摘要翻译： 一种用于CDMA的自适应加权并行干扰消除系统，其降低了MAI（多址干扰），从而提高了一般性能，包括在用户的接收信号中迭代消除MAI的K个级。 每个阶段包括检测器，再生器和减法器。 检测器被配置为从解扩信号确定暂定位决定。 与检测器并联连接的再生器被配置为扩展未调制的信号，乘以通道相位，并乘以检测器的输出。 减法器使用由用户调整的加权信号，并根据不断变化的环境。

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：US07099376B2

公开(公告)日：2006-08-29

申请号：US09995740

申请日：2001-11-29

申请人： Young Wha Kim ,  Seong Rag Kim ,  Sung Ho Cho

发明人： Young Wha Kim ,  Seong Rag Kim ,  Sung Ho Cho

IPC分类号： H04B1/707

CPC分类号： H04B1/71075

摘要： A method for parallel type interference cancellation in a CDMA receiver, wherein minimum processing delay time is required while ensuring performance of an interference cancellation device, and space for embedding hardware for implementing the method can be reduced. The method for parallel type interference cancellation in a CDMA receiver, comprising: (a) when an over sample position of a received signal reaches the end of a symbol of a user, completing temporary detecting and recovering the symbol of the user; (b) generating a residual signal by using the recovered signal of the user and received signal state; and (c) detecting symbol information by obtaining an interference cancelled signal by adding the residual signal to the recovered signal of the user.

摘要翻译： 一种在CDMA接收机中并行型干扰消除的方法，其中在确保干扰消除装置的性能的同时需要最小的处理延迟时间，并且可以减少用于实现该方法的用于嵌入硬件的空间。 一种CDMA接收机中的并行型干扰消除方法，包括：（a）当接收信号的过采样位置到达用户符号的末尾时，完成临时检测和恢复用户的符号; （b）通过使用用户的恢复信号和接收到的信号状态产生残余信号; 以及（c）通过将剩余信号加到用户的恢复信号上来获得干扰消除信号来检测符号信息。

公开(公告)号：US20110195658A1

公开(公告)日：2011-08-11

申请号：US13025742

申请日：2011-02-11

申请人： Seong Rag Kim ,  Seuck Ho Won ,  Jung-Im Kim

发明人： Seong Rag Kim ,  Seuck Ho Won ,  Jung-Im Kim

IPC分类号： H04B7/14 ,  H04B3/36

CPC分类号： H04B7/15542

摘要： A retransmission apparatus for retransmitting information received from a base station to a reception apparatus includes: a reception unit configured to receive information regarding a plurality of layers from the base station; determining unit configured to determine retransmission control information including at least one layer to be retransmitted among the plurality of layers based on feedback information received from the reception apparatus; and a transmission unit configured to retransmit the at least one layer information to the reception apparatus based on the results of the determining unit.

摘要翻译： 一种用于将从基站接收的信息重发到接收装置的重发装置，包括：接收单元，被配置为从所述基站接收关于多个层的信息; 确定单元，被配置为基于从所述接收装置接收的反馈信息来确定包括在所述多个层中的要重发的至少一个层的重传控制信息; 以及发送单元，被配置为基于所述确定单元的结果向所述接收装置重发所述至少一个层信息。

公开(公告)号：US20110058528A1

公开(公告)日：2011-03-10

申请号：US12991517

申请日：2009-05-08

申请人： Kapseok Chang ,  Young-Hoon Kim ,  Seong Rag Kim ,  Seuck Ho Won ,  Keun Young Kim

发明人： Kapseok Chang ,  Young-Hoon Kim ,  Seong Rag Kim ,  Seuck Ho Won ,  Keun Young Kim

IPC分类号： H04W72/04

CPC分类号： H04L27/2662 ,  H04L5/0048 ,  H04L5/0053 ,  H04L27/2613 ,  H04L27/2614 ,  H04L27/2657 ,  H04L27/2684

摘要： Disclosed is a symbol synchronization obtaining apparatus robust to a frequency offset in a cell search of a wireless communication system. The symbol synchronization obtaining apparatus robust to a frequency offset in a cell search of a wireless communication system may include a sequence generator to generate a base sequence for obtaining the symbol synchronization, a synchronization pattern generator to generate a modified sequence based on the base sequence, and to generate a synchronization pattern by combining the modified sequence and the base sequence, a frequency mapping unit to perform mapping of transmission information to a time area and a frequency area, based on the synchronization pattern, for generating a transmission frame, and a transmitting unit to transmit the transmission frame.

摘要翻译： 公开了一种对无线通信系统的小区搜索中的频率偏移鲁棒的符号同步获取装置。 对无线通信系统的小区搜索中的频偏进行鲁棒的符号同步获取装置可以包括生成用于获得符号同步的基本序列的序列发生器，基于该基本序列生成修改序列的同步模式发生器， 并且通过组合修改的序列和基本序列来生成同步模式，频率映射单元，用于基于所述同步模式来执行传输信息到时间区域和频率区域的映射，用于生成传输帧，以及传输 单元传输传输帧。

公开(公告)号：US07039094B2

公开(公告)日：2006-05-02

申请号：US10025797

申请日：2001-12-26

申请人： Seong Rag Kim ,  Jinho Choi ,  Young-Ho Jung ,  Seung Chul Hong ,  Yong Hoon Lee

发明人： Seong Rag Kim ,  Jinho Choi ,  Young-Ho Jung ,  Seung Chul Hong ,  Yong Hoon Lee

IPC分类号： H04B1/69

CPC分类号： H04B1/71055 ,  H04B1/7117 ,  H04B1/712

摘要： An adaptive RAKE receiving apparatus is constrained with at least one constraint for use in a mobile communication system. The apparatus includes an input signal generator for generating a complex received signal by gathering multi-path components during a corresponding transmitting signature; adaptive filters for filtering the complex received signal based on a tab weight that is adjusted at a predetermined period; channel estimators for estimating a phase component and an amplitude component of a particular user channel by using the filtered signals to generate channel estimating result signals; a signal recovering unit for recovering an original signal, which was transmitted from a particular user, by combining the filtered signals for all multi-path components and the channel estimating result signals; selecting unit for selecting one between a predetermined trained data signal and the recovered signal from the signal recovering unit; a reference signal generator for generating a reference signal by using the selected signal and the channel estimation result signal; an error calculator for comparing the filtered received signal with the reference signal to calculate error between these compared two signals; and a tap coefficient adjuster for adjusting tap coefficients of the adaptive filtering unit based on MMSE (Minimum Mean Square Error) criterion with at least one constraint.

公开(公告)号：US06473415B1

公开(公告)日：2002-10-29

申请号：US09145240

申请日：1998-09-01

申请人： Seong Rag Kim ,  Jeong Goo Lee ,  Nam Jin Park ,  Hun Lee

发明人： Seong Rag Kim ,  Jeong Goo Lee ,  Nam Jin Park ,  Hun Lee

IPC分类号： H04B1500

CPC分类号： H04B1/71072 ,  H04B2001/71077

摘要： The present invention provides an interference canceling method and the apparatus of a multi-mode subtraction type in asynchronous multipath channels of CDMA system, which cancel the interference based on the received signal power of each user (or path), which make the selected fingers keep participating in the subsequent cancellation processing with new (more cleaned) input signal, which do a scale factor's processing and a clipper's processing to make the tentative bit decision, which can select the proper interference canceling method among various interference canceling method according to the total number of users in service, the hardware speed to implement the present method and the power spread of received signals, which repeat the selected interference canceling process recursively with a stage of hardware, which can reduce the number of stage compared with parallel interference cancellation method of the prior art in case that the interference canceling apparatus is made up multi-stages, which do overlappingly a canceling process of the last bit of the multiple bits for efficient operation in the asynchronous channel, which reduce the interference according to the power sequence of each multipath signal instead of the power sequence of each user signal made up multipath signals for efficient operation in multipath channels with unequal powers, which can increase the performance and capacity of the CDMA system by reducing the interference produced by a multiple access process in CDMA system with the asynchronous multipath channels.

摘要翻译： 本发明提供一种CDMA系统的异步多径信道中的多模式减法类型的干扰消除方法和装置，其基于每个用户（或路径）的接收信号功率消除干扰，这使得所选择的指针保持 参与随后的取消处理，其中新的（更清洁的）输入信号进行缩放因子的处理，并且裁剪器的处理以作出暂定的比特决定，其可以根据总数在各种干扰消除方法中选择适当的干扰消除方法 的用户在使用中，硬件速度来实现本方法和接收信号的功率扩展，其以硬件级递归地重复所选择的干扰消除过程，这可以减少与并行干扰消除方法相比的级数 在干涉消除装置组成的情况下的现有技术 lti级，其重叠地执行多个比特的最后一比特的取消处理，以在异步信道中有效地操作，其根据每个多径信号的功率序列而不是组成的每个用户信号的功率序列来减少干扰 多径信号，用于在具有不等功率的多路径信道中进行有效操作，这可以通过减少由CDMA异步多径信道中的CDMA接入过程产生的干扰来提高CDMA系统的性能和容量。