公开(公告)号：US08149933B2

公开(公告)日：2012-04-03

申请号：US12040023

申请日：2008-02-29

Applicant: Shuangfeng Han ,  Seong-Taek Hwang ,  Zhunhui Zhou ,  Jing Wang ,  Ming Zhao ,  Zheng Xu

Inventor： Shuangfeng Han ,  Seong-Taek Hwang ,  Zhunhui Zhou ,  Jing Wang ,  Ming Zhao ,  Zheng Xu

IPC: H04K1/10

CPC classification number: H04L27/2601 ,  H04L5/0023 ,  H04L5/0032 ,  H04L5/0037 ,  H04L5/0062 ,  H04L5/023

Abstract: Disclosed is a method and an apparatus for subchannel assignment for suppressing inter-antenna interference in an Orthogonal Frequency Division Multiplexing Access (OFDMA) system based distributed wireless communication system equipped with antennas that are randomly distributed in a geographical manner and can simultaneously communicate with multiple Subscriber Stations (SSs). The method includes selecting and obtaining access to distributed antennas which satisfy the data transmission rate that an SS requires and with which the SS can communicate; re-queuing a distributed antenna having the maximum transmitted power within the same cell in high priority; and assigning subchannels to the relevant distributed antennas in an order from the relevant distributed antenna having the high priority.

Abstract translation: 公开了一种用于抑制基于正交频分复用接入（OFDMA）系统的分布式无线通信系统中的天线间干扰的方法和装置，所述分布式无线通信系统配备有以地理方式随机分布并可同时与多个用户通信的天线 车站（SS）。 该方法包括：选择和获得满足SS要求的数据传输速率并与SS通信的分布式天线; 将具有最高发送功率的分布式天线重新排队在高优先级的同一小区内; 以及从具有高优先级的相关分布式天线的顺序向相关的分布式天线分配子信道。

公开(公告)号：US20080117961A1

公开(公告)日：2008-05-22

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: H04L27/00

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：US08571121B2

公开(公告)日：2013-10-29

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: H04L27/10

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; 对于所设置的多个天线子集中的每一个，选择具有基于预定功率分配的准最优功率分配权重wg的准最优天线子集Ag（1 @ g @ 2n-1） 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：US20080200211A1

公开(公告)日：2008-08-21

申请号：US12034713

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: H04M1/00

CPC classification number: H04W16/26 ,  H04W16/32 ,  H04W88/085

Abstract: A system and a method for forming a cell by using distributed antennas in a World interoperability for Microwave Access (WiMAX) mobile communication system supporting a broadband wireless access communication system. A virtual cell is formed with a specific Mobile Station (MS) as a central part of the virtual cell by using distributed antennas, which improves the transmission capacity and the performance of an overall network system without changing the structure of a backbone network and the interface of the overall network system. The system includes, multiple MSes; distributed antennas for perform simultaneous communications with at least one MS among the multiple MSes, and for forming one virtual cell by communicating with the multiple MSes; and a Base Station (BS), which is typically connected to the distributed antennas through optical fibers, for communicating with the MSes.

Abstract translation: 一种用于在支持宽带无线接入通信系统的微波接入（WiMAX）移动通信系统的世界互用性中使用分布式天线形成小区的系统和方法。 通过使用分布式天线，以特定的移动台（MS）作为虚拟小区的中心部分形成虚拟小区，这提高了整个网络系统的传输容量和性能，而不改变骨干网络和接口的结构 的整体网络系统。 该系统包括多个MS; 用于与所述多个MS之间的至少一个MS进行同时通信的分布式天线，以及通过与所述多个MS通信来形成一个虚拟小区; 和基站（BS），其通常通过光纤连接到分布式天线，用于与MS通信。

公开(公告)号：US20080102881A1

公开(公告)日：2008-05-01

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: H04Q7/20 ,  H04M1/00

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：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：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：US08588176B2

公开(公告)日：2013-11-19

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: H04W4/00

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。