公开(公告)号：US08548081B2

公开(公告)日：2013-10-01

申请号：US12034420

申请日：2008-02-20

申请人： Jong Hyeon Park ,  Bok Tae Sim ,  Je Woo Kim

发明人： Jong Hyeon Park ,  Bok Tae Sim ,  Je Woo Kim

IPC分类号： H04B7/02

CPC分类号： H04B7/0857 ,  H04B7/0845 ,  H04L1/04 ,  H04L1/08

摘要： In accordance with a method for diversity combining in an orthogonal frequency division multiple access (OFDMA) system, repetition diversity equalization and combining may be performed with respect to received OFDMA signals. In addition, receiver antenna diversity equalization and combining may be performed with respect to the received OFDMA signals. The repetition diversity equalization and combining and the receiver antenna diversity equalization and combining may be performed in accordance with a maximum ratio combining (MRC) scheme.

摘要翻译： 根据正交频分多址（OFDMA）系统中的分集组合的方法，可以针对所接收的OFDMA信号执行重复分集均衡和组合。 此外，可以相对于所接收的OFDMA信号执行接收机天线分集均衡和组合。 可以根据最大比组合（MRC）方案来执行重复分集均衡和组合以及接收机天线分集均衡和组合。

公开(公告)号：US08532201B2

公开(公告)日：2013-09-10

申请号：US11955062

申请日：2007-12-12

申请人： Jong Hyeon Park ,  Ju Won Park ,  Je Woo Kim

发明人： Jong Hyeon Park ,  Ju Won Park ,  Je Woo Kim

IPC分类号： H04K1/10

CPC分类号： H04L27/2659

摘要： In accordance with a method for identifying a preamble sequence and for estimating an integer carrier frequency offset, a signal that comprises a preamble sequence from a set of possible preamble sequences is received. A reduced set of integer carrier frequency offset (CFO) candidates may be determined. Cross-correlation operations may be performed with respect to the received signal and multiple candidate transmitted signals. Each candidate transmitted signal may include one of the set of possible preamble sequences. In addition, each candidate transmitted signal may correspond to one of the reduced set of integer CFO candidates. Multiple correlation values may be determined as a result of the cross-correlation operations. The correlation values may be used to identify the preamble sequence and to estimate the integer CFO.

摘要翻译： 根据用于识别前导码序列和估计整数载波频率偏移的方法，接收包括来自一组可能的前同步码序列的前置码序列的信号。 可以确定减小的整数载波频率偏移（CFO）候选集。 可以相对于接收信号和多个候选发送信号执行互相关运算。 每个候选发送信号可以包括一组可能的前导码序列之一。 此外，每个候选发送信号可以对应于缩减的整数CFO候选集之一。 作为互相关运算的结果，可以确定多个相关值。 相关值可用于识别前导序列并估计整数CFO。

公开(公告)号：US08488684B2

公开(公告)日：2013-07-16

申请号：US12211890

申请日：2008-09-17

申请人： Jong Hyeon Park ,  Youngjae Kim ,  Je Woo Kim

发明人： Jong Hyeon Park ,  Youngjae Kim ,  Je Woo Kim

IPC分类号： H04B14/06 ,  H04K1/10 ,  H04W4/00

CPC分类号： H04L25/03254 ,  H04L1/0054 ,  H04L1/0055 ,  H04L25/03171 ,  H04L25/03286 ,  H04L25/067 ,  H04L2025/03726

摘要： Certain embodiments of the present disclosure allow a receiver to utilize both a minimum mean square error (MMSE) detection algorithm and a maximum likelihood (ML) detection algorithm. The receiver may control, based on various conditions, a mode selection signal to select between output generated with the MMSE detection algorithm and the ML detection algorithm. By sharing logical components, certain embodiments may allow a receiver to implement both ML and MMSE detection algorithms with minimal computational overhead when compared to implementing a single one of the decoding algorithms.

摘要翻译： 本公开的某些实施例允许接收机同时使用最小均方误差（MMSE）检测算法和最大似然（ML）检测算法。 接收机可以根据各种条件控制模式选择信号，以在MMSE检测算法产生的输出和ML检测算法之间进行选择。 通过共享逻辑组件，当与实现单个解码算法相比时，某些实施例可以允许接收机以最小的计算开销来实现ML和MMSE检测算法。

公开(公告)号：US08055199B2

公开(公告)日：2011-11-08

申请号：US12417595

申请日：2009-04-02

申请人： Youngjae Kim ,  Je Woo Kim ,  Jong Hyeon Park ,  Madihally J. Narasimha

发明人： Youngjae Kim ,  Je Woo Kim ,  Jong Hyeon Park ,  Madihally J. Narasimha

IPC分类号： H04B1/00

CPC分类号： H04B7/024

摘要： Certain embodiments of the present disclosure relate to methods for mitigating interference of signals transmitted to a mobile station (MS) from a plurality of neighboring base stations. By applying a proposed spatio-frequency modulation (SFM) technique at a serving base station (BS) and at each interfering BS, a co-channel interference (CCI) from interfering base stations can be efficiently mitigated at the MS and signal transmitted from the serving BS can be more accurately decoded.

摘要翻译： 本公开的某些实施例涉及用于减轻从多个相邻基站发送到移动站（MS）的信号的干扰的方法。 通过在服务基站（BS）和每个干扰BS处应用提出的空间 - 频率调制（SFM）技术，可以在MS处有效地减轻来自干扰基站的同信道干扰（CCI），并从 服务BS可以更准确地解码。

公开(公告)号：US08000411B2

公开(公告)日：2011-08-16

申请号：US11969857

申请日：2008-01-04

申请人： Jong Hyeon Park ,  Bok Tae Sim ,  Je Woo Kim ,  Serguei A. Glazko ,  Sameer Nanavati ,  Ju Won Park ,  Chun Woo Lee ,  Tae Ryun Chang

发明人： Jong Hyeon Park ,  Bok Tae Sim ,  Je Woo Kim ,  Serguei A. Glazko ,  Sameer Nanavati ,  Ju Won Park ,  Chun Woo Lee ,  Tae Ryun Chang

IPC分类号： H03K9/00 ,  H04L27/00

CPC分类号： H04L1/0054 ,  H04L1/006 ,  H04L1/0072

摘要： A method and apparatus for decoding encoded data bits of a wireless communication transmission are provided. A set of a-priori bit values corresponding to known bit values of the encoded data bits may be generated. Decoding paths that correspond to decoded data bits that are inconsistent with the a-priori bit values may be removed from the possible decoding paths to consider, and decoding the encoded data bits by selecting a decoding path from remaining decoding paths of the possible decoding paths that were not removed. Multiple hypotheses, each corresponding to a different set of a-prior bit values may be evaluated, with the decoded data for a hypothesis selected based on the evaluation output for further processing.

摘要翻译： 提供了一种用于解码无线通信传输的编码数据位的方法和装置。 可以生成对应于编码数据位的已知位值的一组先验位值。 可以从可能的解码路径中去除对应于与先验比特值不一致的解码数据比特的解码路径，并且通过从可能的解码路径的剩余解码路径中选择解码路径来解码编码数据比特， 没有删除。 可以评估每个对应于先前比特值的不同集合的多个假设，其中基于用于进一步处理的评估输出选择的假设的解码数据。

公开(公告)号：US07835426B2

公开(公告)日：2010-11-16

申请号：US11452471

申请日：2006-06-13

申请人： Jong Hyeon Park ,  Je Woo Kim ,  Ju Won Park

发明人： Jong Hyeon Park ,  Je Woo Kim ,  Ju Won Park

IPC分类号： H04B1/38 ,  H04B7/02 ,  H04L1/02

CPC分类号： H04L1/0606 ,  H04B7/0634 ,  H04L25/0206 ,  H04L27/2608

摘要： In an apparatus and method for providing transmit (Tx) diversity in a multi-antenna wireless communication system, Tx diversity is provided by estimating a channel to each antenna using a signal received from the antenna, estimating channel state information (CSI) from the first Tx node to each antenna using the estimated channel, and determining a signal to be transmitted to the antennas in different methods according to whether phase compensation is required for information to be transmitted using the estimated channel and the CSI.

摘要翻译： 在用于在多天线无线通信系统中提供发射（Tx）分集的装置和方法中，通过使用从天线接收的信号估计到每个天线的信道来提供Tx分集，从第一个信道估计信道状态信息 使用所估计的信道向每个天线发送Tx节点，并且根据是否需要使用所估计的信道和CSI发送的信息来相位补偿，以不同的方法确定要发送到天线的信号。

公开(公告)号：US20100091912A1

公开(公告)日：2010-04-15

申请号：US12351820

申请日：2009-01-10

申请人： Jong Hyeon Park ,  Matthias Brehler ,  Brian Clarke Banister ,  Albert van Zelst ,  Tae Ryun Chang ,  Vincent K. Jones ,  Je Woo Kim

发明人： Jong Hyeon Park ,  Matthias Brehler ,  Brian Clarke Banister ,  Albert van Zelst ,  Tae Ryun Chang ,  Vincent K. Jones ,  Je Woo Kim

IPC分类号： H04L27/06

CPC分类号： H04L25/03171 ,  H04L5/0023 ,  H04L25/03197 ,  H04L25/03331 ,  H04L2025/03414 ,  H04L2025/03426

摘要： Certain embodiments of the present disclosure provide techniques for approximate computation of l2 norms as a part of the maximum likelihood (ML) detection: tri-maxmin, maxsum and sortsum algorithms. The proposed approximation schemes show better accuracy than conventional approximation schemes—the abssum and maxmin algorithms, while the computational complexity is very similar. The error rate performance of the ML detection that utilizes proposed norm-approximation techniques are very close to the reference ML detection with exact calculation of l2 norms, while the computational complexity is significantly smaller.

摘要翻译： 本公开的某些实施例提供了作为最大似然（ML）检测的一部分近似计算l2范数的技术：tri-maxmin，maxsum和sortsum算法。 所提出的近似方案显示出比传统的近似方案更好的精度 - abssum和maxmin算法，而计算复杂度非常相似。 利用提出的范数近似技术的ML检测的误码率性能与精确计算l2范数的参考ML检测非常接近，而计算复杂度显着更小。

公开(公告)号：US20100067600A1

公开(公告)日：2010-03-18

申请号：US12211884

申请日：2008-09-17

申请人： Youngjae Kim ,  Je Woo Kim ,  Jong Hyeon Park

发明人： Youngjae Kim ,  Je Woo Kim ,  Jong Hyeon Park

IPC分类号： H04L1/02 ,  H04L27/28 ,  H04B7/10

CPC分类号： H04L25/03159 ,  H04L25/0204 ,  H04L27/2647 ,  H04L2025/03426 ,  H04L2025/03617

摘要： Aspects of the disclosure provide unbiased channel equalization applied in a MIMO OFDM system with spatial multiplexing. According to certain embodiments, a MMSE receiver can be implemented with the QR decomposition (QRMMSE detection) instead of direct inversion of channel matrix by exploiting an augmented channel matrix. A simple and efficient bias removal technique is presented herein, whereby unbiased QRMMSE equalization may provide identical detection accuracy as a conventional unbiased MMSE approach. For certain embodiments, multiple access interference may be further reduced if the VBLAST version of the unbiased QRMMSE detection is applied.

摘要翻译： 本公开的方面提供了在具有空间复用的MIMO OFDM系统中应用的无偏信道均衡。 根据某些实施例，可以用QR分解（QRMMSE检测）来实现MMSE接收机，而不是通过利用增强的信道矩阵来直接反转信道矩阵。 本文提出了一种简单有效的偏移去除技术，由此无偏差的QRMMSE均衡可以提供与传统的无偏差MMSE方法相同的检测精度。 对于某些实施例，如果应用无偏差QRMMSE检测的VBLAST版本，则可以进一步减少多址接入干扰。

公开(公告)号：US08666004B2

公开(公告)日：2014-03-04

申请号：US12124955

申请日：2008-05-21

申请人： Je Woo Kim ,  Jong Hyeon Park ,  Tae Ryun Chang ,  Ju Won Park

发明人： Je Woo Kim ,  Jong Hyeon Park ,  Tae Ryun Chang ,  Ju Won Park

IPC分类号： H04L1/02

CPC分类号： H04B7/0871 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0669 ,  H04B7/0689 ,  H04B7/0857

摘要： Certain embodiments of the present disclosure provide a hybrid receiver diversity scheme that involves combining received signals in accordance with a combination of multiple receive diversity schemes. Certain embodiments of the present disclosure provide a hybrid transmit diversity scheme that involves transmitting diversity signals to a receiver according to a transmit diversity scheme selected based on signal quality measurements received from the receiver.

摘要翻译： 本公开的某些实施例提供了一种混合接收机分集方案，其涉及根据多个接收分集方案的组合来组合接收到的信号。 本公开的某些实施例提供了一种混合发射分集方案，其涉及根据从接收机接收的信号质量测量选择的发射分集方案向接收机发送分集信号。

公开(公告)号：US08509324B2

公开(公告)日：2013-08-13

申请号：US12169625

申请日：2008-07-08

申请人： Je Woo Kim ,  Ayman Fawzy Naguib ,  Jong Hyeon Park ,  Tae Ryun Chang

发明人： Je Woo Kim ,  Ayman Fawzy Naguib ,  Jong Hyeon Park ,  Tae Ryun Chang

IPC分类号： H04K1/10

CPC分类号： H04L5/0007 ,  H04L27/2602 ,  H04L27/2614

摘要： Certain embodiments of the present disclosure provide a method and an apparatus for peak-to-average power ratio (PAPR) reduction of a transmission signal in a single carrier frequency division multiple access (SC-FDMA) system. The method may utilize a permutation of a time domain signal, and/or a permutation of a frequency domain signal or a permutation of a signal transformed by a unitary matrix. The apparatus may include an M-point DFT or some other M×M unitary matrix, N-point IDFT, interpolation and frequency conversion units, and a pair of possibly different permutation matrices of size M×M, where M can be less or equal than N.

摘要翻译： 本公开的某些实施例提供了在单载波频分多址（SC-FDMA）系统中发送信号的峰均功率比（PAPR）降低的方法和装置。 该方法可以利用时域信号的置换和/或频域信号的置换或由酉矩阵变换的信号的置换。 该装置可以包括M点DFT或一些其他M×M酉矩阵，N点IDFT，内插和频率转换单元，以及大小为M×M的一对可能不同的置换矩阵，其中M可以小于或等于 比N.