公开(公告)号：US07949360B2

公开(公告)日：2011-05-24

申请号：US11977612

申请日：2007-10-25

Applicant: Shuangfeng Han ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Byung-Jik Kim ,  Han-Lim Lee

Inventor： Shuangfeng Han ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Byung-Jik Kim ,  Han-Lim Lee

IPC: H03C7/02 ,  H04M1/00 ,  H04L27/00 ,  H01Q3/00 ,  H04B7/185 ,  H04B7/02 ,  H04B7/00 ,  H04B1/02 ,  H04B17/00 ,  H04B1/66 ,  H04B3/46

CPC classification number: H01Q3/30 ,  H04B7/0443 ,  H04B7/0669 ,  H04B7/0691 ,  H04W52/346 ,  H04W52/42

Abstract: An apparatus that adaptively allocates transmission power for beam-forming combined with orthogonal space time block codes in a distributed wireless communication system, the apparatus including: sub-arrays for beam-forming, which are geographically distributed and each of which includes a plurality of distributed antennas placed in random groups. A central processing unit provides predetermined combinable power allocation schemes according to subsets in a plurality of the sub-arrays, identifying performances of the schemes by using information on large-scale fading of each of the sub-arrays fed back from a receiving party, setting a subset having best performance as an optimal subset according to the identified performances, and performing power allocation according thereto.

Abstract translation: 一种在分布式无线通信系统中自适应地分配与正交空间时间块码组合的波束成形的发射功率的装置，该装置包括：地理分布的波束形成子阵列，每个子阵列包括多个分布式 天线放置在随机组中。 中央处理单元根据多个子阵列中的子集提供预定的可组合功率分配方案，通过使用关于从接收方反馈的每个子阵列的大规模衰落的信息来识别方案的性能，设置 根据所识别的性能，具有作为最佳子集的最佳性能的子集，以及根据所识别的性能执行功率分配。

公开(公告)号：US07904106B2

公开(公告)日：2011-03-08

申请号：US11974402

申请日：2007-10-12

Applicant: Shuangfeng Han ,  Seong-Taek Hwang ,  Hoon Kim ,  Sang-Ho Kim ,  Jae-Hun Cho ,  Jae-Hoon Lee ,  Ki-Uk Song

Inventor： Shuangfeng Han ,  Seong-Taek Hwang ,  Hoon Kim ,  Sang-Ho Kim ,  Jae-Hun Cho ,  Jae-Hoon Lee ,  Ki-Uk Song

IPC: H04B1/04 ,  H04B7/02 ,  H04B7/00 ,  H04B7/185 ,  H04B1/02 ,  H04B17/00 ,  H04B1/66 ,  H04B3/46 ,  H03C7/02 ,  H04M1/00 ,  H04L27/00 ,  H01Q3/00

CPC classification number: H04W52/42 ,  H04B7/043 ,  H04B7/0617 ,  H04B7/0691 ,  H04L1/0625 ,  H04L1/0668 ,  H04W52/04

Abstract: Disclosed is an apparatus and method for adaptively allocating transmission power for beamforming combined with orthogonal space-time block codes (OSTBC) in a distributed wireless communication system, the apparatus comprising: a plurality of sub-arrays for beamforming, which are geographically distributed and each of which comprises a plurality of distributed antennas placed in random groups; and a central processing unit for identifying performances of subsets by applying a predetermined power allocation scheme according to subsets which can be obtained by combining the sub-arrays, by means of a Nakagami fading parameter and information about large-scale fading of each of the sub-arrays, fed back from a receiving party, for determining a subset having a best performance as an optimal subset according to the identified performances, and for performing power allocation based on the subset set as the optimal subset.

Abstract translation: 公开了一种用于在分布式无线通信系统中自适应地分配与正交空时块码（OSTBC）组合的波束成形的发射功率的装置和方法，该装置包括：多个用于波束成形的子阵列，其在地理上分布并且每个 其中包括放置在随机组中的多个分布式天线; 以及中央处理单元，用于通过应用根据可以通过组合子阵列获得的子集的预定功率分配方案，通过Nakagami衰落参数和关于每个子级的大规模衰落的信息来应用子集的性能 - 从接收方反馈的用于根据所识别的性能确定具有最佳性能的子集作为最佳子集的子阵列，以及用于基于所述子集作为所述最佳子集执行功率分配。

公开(公告)号：US20110053633A1

公开(公告)日：2011-03-03

申请号：US12807117

申请日：2010-08-27

Applicant: Shuangfeng Han ,  David Mazzarese ,  Sang-Woo Lee

Inventor： Shuangfeng Han ,  David Mazzarese ,  Sang-Woo Lee

IPC: H04B7/00

CPC classification number: H04B7/024 ,  H04B7/0619 ,  H04B7/0632 ,  H04B7/0639 ,  H04B7/0643 ,  H04B17/345

Abstract: A method for triggering multicell MIMO schemes in a multiple antenna system includes transmitting, at a Mobile Station (MS), a first feedback information for single-cell closed-loop MIMO to a Base Station (BS); requesting, at the BS, Normalized Interference Power (NIP) feedback from the MS based on the first feedback information; feeding, at the MS, the NIP back to the BS; selecting, at the BS, a first NIP threshold and a second NIP threshold based on the NIP fed back from the MS; and requesting, at the MS, one of a first MIMO scheme and a second MIMO scheme by comparing the calculated first and second NIPs with the first NIP threshold and the second NIP threshold.

Abstract translation: 用于在多天线系统中触发多单元MIMO方案的方法包括在移动站（MS）向基站（BS）发送用于单小区闭环MIMO的第一反馈信息; 基于第一反馈信息，从BS请求从MS获得的归一化干扰功率（NIP）反馈; 在MS处将NIP送回BS; 基于从MS反馈的NIP，在BS处选择第一NIP阈值和第二NIP阈值; 以及通过将计算的第一和第二NIP与第一NIP阈值和第二NIP阈值进行比较，在MS处请求第一MIMO方案和第二MIMO方案之一。

公开(公告)号：US20080205538A1

公开(公告)日：2008-08-28

申请号：US12034723

申请日：2008-02-21

Applicant: Shuangfeng HAN ,  Seong-Taek Hwang ,  Han-Lim Lee

Inventor： Shuangfeng HAN ,  Seong-Taek Hwang ,  Han-Lim Lee

IPC: H04B7/12

CPC classification number: H04L1/20 ,  H04B7/0443 ,  H04L1/0618 ,  Y02D70/444

Abstract: A method for Symbol Error Rate (SER) approximation of an SER-based transmission power allocation operation for an Orthogonal Space Time Block Code in a DWCS equipped with multiple transmission Distributed Antennas (DA) geographically dispersed at random. The method for SER approximation includes the steps of: setting multiple combinable antenna subsets from the multiple DAs; selecting a quasi-optimal antenna subset Ag (1≦g≦2n−1) having a quasi-optimal power allocation weight wg based on predetermined power allocation, for each of the set multiple antenna subsets; and calculating an SER approximation value of the selected quasi-optimal antenna subset by applying a Probability Density Function (PDF) of a Signal-to-Noise Ratio (SNR) to the OSTBC SER having symbol constellation of a predetermined modulation scheme. The output of the SER approximation value can be output to a transmitter, or to a space-time encoder of a central processor for optimal power transmission.

Abstract translation: 一种用于在配备有随机分布的多传输分布式天线（DA）的DWCS中的正交空间时间块码的基于SER的发射功率分配操作的符号误码率（SER）近似方法。 SER近似的方法包括以下步骤：从多个DA设置多个可组合天线子集; 选择具有准最优功率分配权重w（g）的准最优天线子集A 1（1 <= G 2 = 基于预定功率分配，对于所设置的多个天线子集中的每一个; 以及通过将具有信号噪声比（SNR）的概率密度函数（PDF））应用于具有预定调制方案的符号星座图的OSTBC SER来计算所选择的准最佳天线子集的SER近似值。 SER近似值的输出可以输出到中央处理器的发射机或时空编码器，以实现最佳的功率传输。

公开(公告)号：US20080198808A1

公开(公告)日：2008-08-21

申请号：US12034706

申请日：2008-02-21

Applicant: Seong-Taek HWANG ,  Shuangfeng Han ,  Chunhui Zhou ,  Jing Wang ,  Ming Zhao ,  Zheng Xu

Inventor： Seong-Taek HWANG ,  Shuangfeng Han ,  Chunhui Zhou ,  Jing Wang ,  Ming Zhao ,  Zheng Xu

IPC: H04Q7/00

CPC classification number: H04W36/06 ,  H04W88/085

Abstract: Disclosed is a system and a method for performing handover in a Worldwide interoperability for Microwave Access (WiMAX) mobile communication system supporting broadband wireless access. The system includes a plurality of Mobile Stations (MSs); at least one distributed antenna having the ability to perform simultaneous communications with the plurality of MSs; and a base station connected to the at least one distributed antenna through optical fibers for performing communications and handovers with the multiple MSs.

Abstract translation: 公开了一种在支持宽带无线接入的全球微波接入（WiMAX）移动通信系统互操作性中进行切换的系统和方法。 该系统包括多个移动站（MS）; 至少一个具有与所述多个MS同时通信的能力的分布式天线; 以及通过光纤连接到所述至少一个分布式天线的基站，用于执行与所述多个MS的通信和切换。

公开(公告)号：US20080107202A1

公开(公告)日：2008-05-08

申请号：US11906370

申请日：2007-10-02

Applicant: Han-Lim Lee ,  Shuangfeng Han ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Hoon Kim

Inventor： Han-Lim Lee ,  Shuangfeng Han ,  Yun-Je Oh ,  Seong-Taek Hwang ,  Hoon Kim

IPC: H04B7/02

CPC classification number: H04L27/18 ,  H04B7/0413 ,  H04B10/2575 ,  H04J13/00

Abstract: A multiple-input multiple-output (MIMO) communication system includes a base station and a relay station that are connected through an optical fiber. The relay station wirelessly transmits through a plurality of antennas a signal received from the base station. The base station includes a plurality of symbol mappers for mapping input bit streams into a plurality of symbol signals; a MIMO multiplexer generating a plurality of exchange signals by exchanging bits of the symbol signals; and a plurality of code spreaders generating a plurality of spread signals by band spreading the exchange signals. The adoption of a wire transmission scheme for connecting the base station with the relay station through a single optical fiber provides benefits in cost reduction and complexity as the number of electrical-to-optical converters is reduced, and the bandwidth is superior to those in wireless transmission scheme

Abstract translation: 多输入多输出（MIMO）通信系统包括通过光纤连接的基站和中继站。 中继站通过多个天线无线地发送从基站接收的信号。 基站包括用于将输入比特流映射成多个符号信号的多个符号映射器; MIMO多路复用器，通过交换所述符号信号的位来产生多个交换信号; 以及多个代码扩展器，通过对交换信号进行频谱扩展来产生多个扩展信号。 采用通过单个光纤将基站与中继站连接的有线传输方案随着电 - 光转换器的数量的减少和复杂度的降低和复杂性的提高，带宽优于无线 传输方案

公开(公告)号：US08874126B2

公开(公告)日：2014-10-28

申请号：US13415730

申请日：2012-03-08

Applicant: Su-Ryong Jeong ,  Sung-Eun Park ,  Hyun-Kyu Yu ,  Chi-Woo Lim ,  Shuangfeng Han

Inventor： Su-Ryong Jeong ,  Sung-Eun Park ,  Hyun-Kyu Yu ,  Chi-Woo Lim ,  Shuangfeng Han

IPC: H04W72/00 ,  H04W48/12 ,  H04W48/20 ,  H04W72/08 ,  H04W72/04

CPC classification number: H04W48/12 ,  H04W48/20 ,  H04W72/042 ,  H04W72/082

Abstract: An apparatus and method for initial ranging in a wireless communication system including a heterogeneous network. An operation of a terminal includes selecting a serving cell considering a biased value of a base station applying range expansion. The operation also includes receiving ranging code classification information and threshold information associated with the serving cell. The operation further includes, if a channel quality with the serving cell is less than the threshold, selecting one a plurality of poor-expected-ranging codes indicated by the ranging code classification information, and performing initial ranging using the selected poor-expected-ranging code.

Abstract translation: 一种用于包括异构网络的无线通信系统中的初始测距的装置和方法。 终端的操作包括考虑基站施加范围扩展的偏置值来选择服务小区。 该操作还包括接收测距码分类信息和与服务小区相关联的阈值信息。 该操作还包括：如果与服务小区的信道质量小于阈值，则选择由测距码分类信息指示的多个不良预期测距码中的一个，并且使用所选择的预期不合格范围进行初始测距 码。

公开(公告)号：US08626071B2

公开(公告)日：2014-01-07

申请号：US13358386

申请日：2012-01-25

Applicant: Shuangfeng Han ,  Chi-Woo Lim

Inventor： Shuangfeng Han ,  Chi-Woo Lim

IPC: H04B1/00

CPC classification number: H04W72/082 ,  H04B7/0639 ,  H04W16/28 ,  H04W28/04 ,  H04W52/244 ,  H04W72/0413 ,  H04W72/0453 ,  H04W84/045

Abstract: A method and apparatus provide interference mitigation in a heterogeneous network using beamforming. In the method, a macro Mobile Station (MS) receives a broadcast message including a Precoding Matrix Index (PMI) set restricted in a macro cell, measures a Signal-to-Interference plus Noise Ratio (SINR) and a channel power from an adjacent femto Base Station (BS) and calculates a PMI, determines whether to request a dedicated frequency resource for a macro MS on the basis of the measured SINR, the channel power from the adjacent femto BS, and the calculated PMI, and requests the dedicated frequency resource for the macro MS from a macro BS.

Abstract translation: 一种方法和装置使用波束形成在异构网络中提供干扰减轻。 在该方法中，宏移动站（MS）接收包括在宏小区中限制的集合的预编码矩阵索引（PMI）的广播消息，测量来自相邻的信元干扰加噪声比（SINR）和信道功率 毫微微基站（BS）并且计算PMI，基于测量的SINR，来自相邻毫微微BS的信道功率和所计算的PMI，确定是否请求用于宏MS的专用频率资源，并请求专用频率 来自宏BS的宏MS的资源。

公开(公告)号：US08615198B2

公开(公告)日：2013-12-24

申请号：US12807117

申请日：2010-08-27

Applicant: Shuangfeng Han ,  David Mazzarese ,  Sang-Woo Lee

Inventor： Shuangfeng Han ,  David Mazzarese ,  Sang-Woo Lee

IPC: H04B1/00

CPC classification number: H04B7/024 ,  H04B7/0619 ,  H04B7/0632 ,  H04B7/0639 ,  H04B7/0643 ,  H04B17/345

Abstract: A method for triggering multicell MIMO schemes in a multiple antenna system includes transmitting, at a Mobile Station (MS), a first feedback information for single-cell closed-loop MIMO to a Base Station (BS); requesting, at the BS, Normalized Interference Power (NIP) feedback from the MS based on the first feedback information; feeding, at the MS, the NIP back to the BS; selecting, at the BS, a first NIP threshold and a second NIP threshold based on the NIP fed back from the MS; and requesting, at the MS, one of a first MIMO scheme and a second MIMO scheme by comparing the calculated first and second NIPs with the first NIP threshold and the second NIP threshold.

Abstract translation: 一种用于在多天线系统中触发多单元MIMO方案的方法包括在移动站（MS）向基站（BS）发送用于单小区闭环MIMO的第一反馈信息; 基于第一反馈信息，从BS请求从MS获得的归一化干扰功率（NIP）反馈; 在MS上将NIP送回BS; 基于从MS反馈的NIP，在BS处选择第一NIP阈值和第二NIP阈值; 以及通过将计算的第一和第二NIP与第一NIP阈值和第二NIP阈值进行比较，在MS处请求第一MIMO方案和第二MIMO方案之一。

公开(公告)号：US08605800B2

公开(公告)日：2013-12-10

申请号：US13196295

申请日：2011-08-02

Applicant: Shuangfeng Han

Inventor： Shuangfeng Han

IPC: H04L27/00

CPC classification number: H04W48/14 ,  H04B7/024 ,  H04B7/0417 ,  H04B7/0639

Abstract: An apparatus and a method for operating a Mobile Station (MS) in a wireless communication system are provided. The method includes receiving a threshold for a gap of an average Receive (Rx) power between a neighboring Base Station (BS) and a serving BS, transmitting to the serving BS, identification information of a BS having the average power greater than a first value, receiving information of a BS involving joint processing generated using information of the BS having the average power greater than the first value, feeding Precoding Matrix Index (PMI) information of the BS involving the joint processing, back to the serving BS, receiving information indicating a PMI operation mode of the MS, from the serving BS, and determining a PMI operation mode according to the information indicating the PMI operation mode of the MS.

Abstract translation: 提供了一种在无线通信系统中操作移动台（MS）的装置和方法。 该方法包括：接收相邻基站（BS）和服务BS之间的平均接收（Rx）功率的间隙的阈值，向服务BS发送平均功率大于第一值的BS的识别信息 接收涉及使用平均功率大于第一值的BS的信息产生的联合处理的BS的信息，将涉及联合处理的BS的预编码矩阵索引（PMI）信息提供给服务BS，接收信息指示 来自服务BS的MS的PMI操作模式，以及根据指示MS的PMI操作模式的信息来确定PMI操作模式。