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1. 发明授权

US07027491B2 Interference cancellation receiver for use in a CDMA system 失效
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.

2. 发明授权

US06741634B1 Apparatus and method of adaptive weighted parallel interference cancellation system for CDMA 有权
标题翻译： CDMA自适应加权并行干扰消除系统的装置与方法
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。

3. 发明授权

US07075916B2 Apparatus for cancelling interference in CDMA system using multiple transfer rates and method thereof 失效
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.

4. 发明授权

US07634030B2 Data transmission apparatus for DS/CDMA system equipped with MIMO antenna system 失效
标题翻译：具有MIMO天线系统的DS / CDMA系统的数据传输装置
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。

5. 发明授权

US06865219B2 Apparatus and method of circular group-wise parallel interference cancellation for multi-rate DS-CDMA system 失效
标题翻译：用于多速率DS-CDMA系统的循环分组并行干扰消除的装置和方法
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。

6. 发明申请

US20110195658A1 LAYERED RETRANSMISSION APPARATUS AND METHOD, RECEPTION APPARATUS AND RECEPTION METHOD 审中-公开
标题翻译：层次重新装置和方法，接收装置和接收方法
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。

7. 发明申请

US20110058528A1 SYMBOL TIMING SYNCHRONIZATION OBTAINING METHOD AND APPARATUS ROBUST TO FREQUENCY OFFSET IN CELL SEARCH OF WIRELESS COMMUNICATION SYSTEM 有权
标题翻译：符号时序同步获取方法和设备对无线通信系统的细胞搜索频率偏移的鲁棒性
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。

8. 发明授权

US07039094B2 Adaptive rake receiving apparatus constrained with at least one constraint for use in mobile communication system and method therefor 失效
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.

9. 发明授权

US06473415B1 Interference canceling method and apparatus of a multi-mode subtraction type in asynchronous multipath channels of code division multiple access system 有权
标题翻译：一种多模式减法类型在码分多址系统的异步多径信道中的干扰消除方法和装置
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。

10. 发明授权

US6067333A Adaptive serial and parallel mixed interference cancellation method 失效
标题翻译：自适应串并联混合干扰消除法
公开(公告)号：US6067333A
公开(公告)日：2000-05-23
申请号：US977826
申请日：1997-11-25
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： H03H21/00 , H04B1/10 , H04B1/7097 , H04B7/005 , H04J13/00 , H03D1/04 , H03K5/01 , H03K6/04 , H04L25/08
CPC分类号： H04B1/71072 , H04B1/71075
摘要： The present invention relates to a CDMA system, which, in part, uses serial and parallel interference cancellation methods to overcome disadvantages of a method of detecting single user, and comprises a feedback loops for providing reproduced signals to respective inputs of detectors, and a means for controlling an operation for the detectors to attribute to interference cancellation process. The detectors to contribute to interference cancellation process can be also selected group by group. It is used to switch off only detectors contributing to interference cancellation process in progress and detectors contributing to previous interference cancellation, providing a adaptive serial and parallel mixed interference cancellation method for increasing performance and capacity of the CDMA system.
摘要翻译：本发明涉及一种CDMA系统，其部分地使用串并行干扰消除方法来克服检测单用户的方法的缺点，并且包括用于向检测器的各个输入提供再现信号的反馈回路，以及一种装置用于控制检测器的操作属于干扰消除处理。有助于干扰消除过程的检测器也可以逐组选择。它用于仅关闭有助于干扰消除过程的检测器和有助于先前干扰消除的检测器，提供用于提高CDMA系统的性能和容量的自适应串并联混合干扰消除方法。

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