公开(公告)号：US20100142490A1

公开(公告)日：2010-06-10

申请号：US12710933

申请日：2010-02-23

Applicant: Byoung-Hoon Kim ,  Youngbin Wei ,  Amir Dabbagh

Inventor： Byoung-Hoon Kim ,  Youngbin Wei ,  Amir Dabbagh

IPC: H04W72/04 ,  H04B7/216 ,  H04B7/02

CPC classification number: H04J13/0003 ,  H04B7/0421 ,  H04B7/0671 ,  H04B7/0678 ,  H04B7/068 ,  H04B7/0697 ,  H04B17/309 ,  H04B2201/70701 ,  H04J3/00 ,  H04J13/0022 ,  H04J13/0059 ,  H04J13/0062 ,  H04L5/0023 ,  H04L5/0026 ,  H04L5/0051 ,  H04L5/06 ,  H04L25/0204 ,  H04L25/0226 ,  H04L27/2601 ,  H04L27/2613 ,  H04L27/2636

Abstract: Techniques for multiplexing pilots in a wireless transmission are described. In one aspect, a transmitter station generates multiple pilot sequences for multiple transmit antennas, with each pilot sequence comprising pilot symbols sent in the time domain on a different set of subcarriers. The transmitter station further generates multiple pilot transmissions for the transmit antennas based on the pilot sequences. In another aspect, a transmitter station generates multiple pilot sequences for multiple transmit antennas based on frequency-domain code division multiplexing (FD-CDM) of a Chu sequence defined by a transmitter-specific value. The transmitter station further generates multiple pilot transmissions for the transmit antennas based on the pilot sequences. In yet another aspect, a transmitter station generates multiple pilot transmissions for multiple transmit antennas based on a first multiplexing scheme and generates multiple data transmissions based on a second multiplexing scheme that is different from the first multiplexing scheme.

Abstract translation: 描述用于在无线传输中复用导频的技术。 在一个方面，发射机站为多个发射天线生成多个导频序列，每个导频序列包括在不同子载波集上的时域中发送的导频符号。 发射台还根据导频序列进一步为发射天线产生多个导频传输。 在另一方面，发射机站基于由发射机特定值定义的楚序列的频域码分复用（FD-CDM），为多个发射天线生成多个导频序列。 发射台还根据导频序列进一步为发射天线产生多个导频传输。 在另一方面，发射机站基于第一复用方案为多个发射天线生成多个导频传输，并且基于与第一复用方案不同的第二复用方案来生成多个数据传输。

公开(公告)号：US20100103906A1

公开(公告)日：2010-04-29

申请号：US12443960

申请日：2007-10-31

Applicant: Juan Montojo ,  Byoung-Hoon Kim ,  Durga Prasad Malladi ,  Tao Luo

Inventor： Juan Montojo ,  Byoung-Hoon Kim ,  Durga Prasad Malladi ,  Tao Luo

IPC: H04B7/216 ,  H04W8/00

CPC classification number: H04W48/16 ,  H04B2201/70701 ,  H04J11/0069 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/0048 ,  H04W48/08 ,  Y02D70/00 ,  Y02D70/1222 ,  Y02D70/1262 ,  Y02D70/25

Abstract: Systems and methodologies are described that provide techniques for efficient cell search in a wireless communication system. In one aspect, a frequency reuse pattern can be generated by applying frequency shifts to reference signals transmitted from cells that provide coverage for a NodeB based on cell IDs or cell group IDs for the cells. The frequency shifts applied to reference signals can then be utilized as a basis for multiplexing reference signals from different cells using frequency division multiplexing (FDM) or a combination of FDM and other multiplexing techniques. Other adjustments to reference signals transmitted from respective cells, such as transmit power adjustments, can further be made to improve detection performance.

Abstract translation: 描述了提供用于无线通信系统中的有效小区搜索的技术的系统和方法。 在一个方面，可以通过将频移应用于从为小区提供覆盖的小区发送的参考信号来生成频率重用模式，所述小区基于小区的小区ID或小区组ID。 然后，施加到参考信号的频移可以用作使用频分复用（FDM）或FDM和其他复用技术的组合对来自不同小区的参考信号进行复用的基础。 可以进一步对从各小区发送的参考信号进行调整，例如发射功率调整，以提高检测性能。

公开(公告)号：US20100041409A1

公开(公告)日：2010-02-18

申请号：US12453065

申请日：2009-04-28

Applicant: Byoung-Hoon Kim ,  Hanbyul Seo ,  Hyungtae Kim

Inventor： Byoung-Hoon Kim ,  Hanbyul Seo ,  Hyungtae Kim

IPC: H04W72/04

CPC classification number: H04W52/26 ,  H04L1/0002 ,  H04L1/0026 ,  H04W52/241 ,  H04W52/40

Abstract: A method of transmitting data in a multi-cell cooperative wireless communication system is provided. The method includes dividing the data into common data and private data, determining a transmission rate and/or a transmission power of the common data and the private data, respectively and transmitting the common data and the private data at the determined transmission rate and/or transmission power. It is possible to mitigate inter-cell interference and improve the performance of the system.

Abstract translation: 提供了一种在多小区协作无线通信系统中发送数据的方法。 该方法包括将数据划分为公共数据和专用数据，分别确定公共数据和专用数据的传输速率和/或传输功率，并以所确定的传输速率和/或 传输功率 可以减轻小区间干扰并提高系统的性能。

公开(公告)号：US07638312B2

公开(公告)日：2009-12-29

申请号：US10582196

申请日：2004-11-23

Applicant: Young-Hoon Park ,  Sang-jo Lim ,  Byoung-Hoon Kim ,  Seong-Jun Kim ,  Ho-Soo Lim

Inventor： Young-Hoon Park ,  Sang-jo Lim ,  Byoung-Hoon Kim ,  Seong-Jun Kim ,  Ho-Soo Lim

IPC: C12P13/22 ,  C12N9/00 ,  C12N1/20 ,  C07H21/04

CPC classification number: C07K14/245 ,  C12N9/88 ,  C12P13/227

Abstract: The present invention relates to a Tryptophan-producing E. coli mutant strain CJ285 (KCCM-10534) containing single or multi mutant genes related with Tryptophan biosynthesis and production method of Tryptophan using the same. More particularly, DNA base sequences and amino acid sequences aroF, aroG, trpR, and tyrR originated from tryptophan producing E. coli mutant strain CJ285 (KCCM-10534) and related with Tryptophan biosynthesis, are disclosed, and E. coli CJ285 containing at least one of the mutant genes is cultivated directly in a glucose-containing fermentation medium, whereby L-tryptophan can be accumulated in the culture medium.

Abstract translation: 本发明涉及含有与色氨酸生物合成相关的单个或多个突变基因的色氨酸产生大肠杆菌突变菌株CJ285（KCCM-10534）和使用其的色氨酸生产方法。 更具体地，公开了源自产生色氨酸的大肠杆菌突变菌株CJ285（KCCM-10534）并与色氨酸生物合成相关的DNA碱基序列和氨基酸序列aroF，aroG，trpR和tyrR，并且至少含有至少含有 其中一个突变基因直接在含葡萄糖的发酵培养基中培养，从而可以将L-色氨酸堆积在培养基中。

公开(公告)号：US20090116573A1

公开(公告)日：2009-05-07

申请号：US12264815

申请日：2008-11-04

Applicant: Peter Gaal ,  Yongbin Wei ,  Byoung-Hoon Kim ,  Durga Prasad Malladi ,  Juan Montojo

Inventor： Peter Gaal ,  Yongbin Wei ,  Byoung-Hoon Kim ,  Durga Prasad Malladi ,  Juan Montojo

IPC: H04B7/02

CPC classification number: H04B7/12 ,  H03M13/2703 ,  H03M13/2742 ,  H03M13/2789 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/0048 ,  H04L5/0053 ,  H04L5/0064 ,  H04L25/022 ,  H04L25/0226 ,  H04L25/0228

Abstract: Aspects relate to a flexible interleaving scheme that provides frequency diversity to randomizes interference Frequency diversity groups can be utilized, wherein control channel elements (CCEs) gain greater frequency diversity for a given number of mini-CCEs (e.g., subset of CCEs). A frequency diversity group index is permuted according to a bit reversed scheme to facilitate control channel elements with a small number of mini-CCEs to also gain sufficient frequency diversity.

Abstract translation: 方面涉及提供频率分集以使随机化干扰的灵活交错方案。可以利用频率分集组，其中控制信道单元（CCE）为给定数量的小型CCE（例如，CCE的子集）获得更大的频率分集。 频率分集组索引根据比特反转方案进行置换，以便于具有少量mini-CCE的控制信道单元以获得足够的频率分集。

公开(公告)号：US20080273582A1

公开(公告)日：2008-11-06

申请号：US12113409

申请日：2008-05-01

Applicant: Peter Gaal ,  Byoung-Hoon Kim ,  Ke Liu ,  Tao Luo

Inventor： Peter Gaal ,  Byoung-Hoon Kim ,  Ke Liu ,  Tao Luo

IPC: H04B17/00

CPC classification number: H04L27/261 ,  H04L25/0226

Abstract: Systems and methods are provided to generate a set of synchronization channel sequences that optimize time and frequency acquisition. A set of root indices of Zadoff-Chu sequences in a first domain (e.g., time domain) that optimize a performance metric or merit factor are identified. An optimal index is determined that also optimizes a performance metric in a reciprocal domain (e.g., frequency domain). Optimal indices satisfy a centro-symmetric relationship with respect to a half-value of sequence length: When 1 is an optimal index, N−1 is also an optimal root index. For sequences of length Q2=N, a base sequence generated with an optimal sequence can be utilized to generate at least two disparate optimal sequences through sign-flip, conjugation, and periodic modulation operations.

Abstract translation: 提供系统和方法以产生优化时间和频率采集的一组同步信道序列。 识别优化性能度量或优点因子的第一域（例如，时域）中的Zadoff-Chu序列的一组根索引。 确定最优索引，该最优索引还优化互倒域（例如，频域）中的性能度量。 最优索引相对于序列长度的半值满足中心对称关系：当1是最优索引时，N-1也是最优根指数。 对于长度为Q 2的序列，可利用最佳序列生成的碱基序列通过符号翻转，共轭和周期调制操作来产生至少两个不同的最佳序列。

公开(公告)号：US20080219341A1

公开(公告)日：2008-09-11

申请号：US11410850

申请日：2006-04-24

Applicant: Byoung-Hoon Kim

Inventor： Byoung-Hoon Kim

IPC: H04L27/01

CPC classification number: H04B7/0845 ,  H04L25/0204 ,  H04L25/021 ,  H04L25/022 ,  H04L25/0242 ,  H04L25/0256 ,  H04L25/03159 ,  H04L2025/03426

Abstract: Techniques for performing space-frequency equalization and spatial equalization in the frequency domain are described. Space-frequency equalization combines signal components across both space and frequency dimensions whereas spatial equalization combines signal components across space. A receiver obtains input symbols for multiple (M) signal copies from multiple (R) receive antennas and multiple (C) times oversampling, where M is equal to R times C. For space-frequency equalization, the receiver derives equalizer coefficients for the M signal copies, e.g., based on MMSE criterion, filters, the input symbols for the M signal copies with the equalizer coefficients, and combines the filtered symbols for the M signal copies to obtain output symbols. Space-frequency equalization may be used for some frequency bins and spatial equalization may be used for other frequency bins to reduce complexity.

Abstract translation: 描述了在频域中执行空间频率均衡和空间均衡的技术。 空间频率均衡将空间和频率尺寸上的信号分量相结合，而空间均衡将信号分量整合在一起。 接收机从多个（R）接收天线和多（C）次过采样获得多个（M）个信号副本的输入符号，其中M等于R次C.对于空间频率均衡，接收机导出M的均衡器系数 信号复制，例如，基于MMSE标准，滤波器，用均衡器系数的M个信号副本的输入符号，并且组合用于M个信号副本的滤波符号以获得输出符号。 空频均衡可以用于一些频率仓，并且空间均衡可以用于其他频率仓，以降低复杂度。

公开(公告)号：US20080080641A1

公开(公告)日：2008-04-03

申请号：US11850451

申请日：2007-09-05

Applicant: Byoung-Hoon Kim

Inventor： Byoung-Hoon Kim

IPC: H04L27/00

CPC classification number: H04B7/0691 ,  H04B7/0632 ,  H04B7/0641 ,  H04L5/0023

Abstract: Systems and methodologies are described that facilitate reducing feedback required to be, transmitted on a reverse link channel in response to a forward link data transmission for multiple-input multiple-output (MIMO) wireless communication systems. In a per group rate control MIMO system, a codeword can be linked to more than one layer. Codewords are mixed among antennas in the MIMO systems based upon a symmetric permutation of antennas groups. Further, codewords are transmitted in permuted form so that receivers can reduce feedback to a base channel quality indicator (CQI) and a differential CQI. Additionally, spatial diversity is increased for each codeword improving the robustness of the system against inaccurate CQI reports.

Abstract translation: 描述了系统和方法，其有助于减少响应于用于多输入多输出（MIMO）无线通信系统的前向链路数据传输在反向链路信道上发送的反馈。 在每组速率控制MIMO系统中，码字可以链接到多于一个层。 基于天线组的对称置换，在MIMO系统中的天线之间混合码字。 此外，代码字以置换形式被发送，使得接收机可以减少对基本信道质量指示符（CQI）和差分CQI的反馈。 此外，针对每个码字增加了空间分集，从而提高了系统针对不准确的CQI报告的鲁棒性。

公开(公告)号：US20060280257A1

公开(公告)日：2006-12-14

申请号：US11449526

申请日：2006-06-07

Applicant: Byoung-Hoon Kim

Inventor： Byoung-Hoon Kim

IPC: H04L1/02 ,  H04L27/06 ,  H04B1/10

CPC classification number: H04L25/03159 ,  H04B7/0619 ,  H04L25/0206 ,  H04L25/03038 ,  H04L25/03057 ,  H04L25/03292 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03509 ,  H04L2025/03522

Abstract: Techniques for generating weights that can provide good performance for transmit diversity are described. A receiver obtains symbols for a data transmission sent from multiple transmit antennas to at least one receive antenna. The receiver also derives channel estimates for a communication channel between the transmit antennas and the receive antenna(s). The receiver performs equalization on the symbols with an equalizer, which may be a linear equalizer or a decision feedback equalizer. The receiver derives weights for the transmit antennas based on the channel estimates and the equalizer and using, e.g., an objective function that is applicable for the equalizer and indicative of a signal-to-noise ratio (SNR) achievable by the equalizer. Different equalizers (e.g., the linear equalizer and decision feedback equalizer) may be associated with different objective functions.

公开(公告)号：US20060255989A1

公开(公告)日：2006-11-16

申请号：US11408477

申请日：2006-04-21

Applicant: Byoung-Hoon Kim ,  Durga Malladi ,  Sandip Sarkar

Inventor： Byoung-Hoon Kim ,  Durga Malladi ,  Sandip Sarkar

IPC: H03M1/10

CPC classification number: H04L1/0036 ,  H04L1/0003 ,  H04L1/0007 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0034 ,  H04L1/16 ,  H04L5/0007 ,  H04L5/0016 ,  H04L5/0023 ,  H04L5/0028 ,  H04L5/0037 ,  H04L5/006

Abstract: Techniques for selecting transmit formats in a manner to account for the degrees of resource reuse for multiple data streams sent simultaneously from multiple antennas are described. The degree of resource reuse for each data stream indicates the amount of reuse of resources (e.g., orthogonal codes or subcarriers) observed by that stream. Interference estimates for the multiple data streams are derived based on an initial resource assignment. The degrees of resource reuse are determined based on the interference estimates and are used to derive at least one correction factor. At least one transmit format is then selected for the data streams using the at least one correction factor. Each data stream is associated with a transmit format that indicates the amount of resources to use for the data stream and other parameters. Resources are assigned to each data stream in accordance with its transmit format.