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    METHOD AND APARATUS FOR MIXED ANALOG/DIGITAL BEAMFORMING
    12.
    发明申请
    METHOD AND APARATUS FOR MIXED ANALOG/DIGITAL BEAMFORMING 审中-公开
    混合模拟/数字波束形成的方法和方法

    公开(公告)号：US20130039401A1

    公开(公告)日：2013-02-14

    申请号：US13572438

    申请日：2012-08-10

    Applicant: Shuangfeng Han ,  Bruno Clerckx

    Inventor： Shuangfeng Han ,  Bruno Clerckx

    IPC: H04B7/06 ,  H04B1/38 ,  H04B17/00 ,  H04L25/49

    CPC classification number: H04B7/0617 ,  H04B7/0413 ,  H04L1/0025 ,  H04L27/2626

    Abstract: A method provides mixed analog/digital beamforming by a transmitter in a mobile communication system. The method includes converting a modulation symbol into a parallel symbol stream, performing digital beamforming on the parallel symbol stream, performing an IFFT operation on the digital-beamformed parallel symbol stream to generate a time-domain symbol, converting the IFFT-operated time-domain symbol into a serial time-domain symbol, inserting a CP into the serial time-domain symbol, performing a DAC operation on the CP-inserted symbol to generate an analog signal, and performing analog beamforming by multiplying the analog signal by the analog beamforming precoder optimized for the first subcarrier transmitted through at least one RF channel.

    Abstract translation: 一种方法通过移动通信系统中的发射机提供混合的模拟/数字波束成形。 该方法包括将调制符号转换成并行符号流，在并行符号流上执行数字波束成形，对数字波束形成的并行符号流执行IFFT操作以产生时域符号，将IFFT操作的时域 将符号插入到串行时域符号中，将CP插入到串行时域符号中，对CP插入符号执行DAC操作以产生模拟信号，并通过模拟波束成形预编码器乘以模拟信号来执行模拟波束成形 针对通过至少一个RF信道传输的第一子载波进行了优化。

    SYSTEM AND METHOD FOR FORMING CELL BY USING DISTRIBUTED ANTENNAS IN WIMAX MOBILE COMMUNICATION SYSTEM
    13.
    发明申请
    SYSTEM AND METHOD FOR FORMING CELL BY USING DISTRIBUTED ANTENNAS IN WIMAX MOBILE COMMUNICATION SYSTEM 审中-公开
    通过在WIMAX移动通信系统中使用分布式天线形成细胞的系统和方法

    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。

    Method and apparatus for adaptively allocating transmission power for beam-forming combined with OSTBCs in a distributed wireless communication system
    14.
    发明申请
    Method and apparatus for adaptively allocating transmission power for beam-forming combined with OSTBCs in a distributed wireless communication system 有权
    用于在分布式无线通信系统中自适应地分配与OSTBC组合的波束形成的发射功率的方法和装置

    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。

    Apparatus and method for network entry in a wireless communication system
    15.
    发明授权
    Apparatus and method for network entry in a wireless communication system 有权
    无线通信系统中网络入口的装置和方法

    公开(公告)号：US09226297B2

    公开(公告)日：2015-12-29

    申请号：US13531308

    申请日：2012-06-22

    Applicant: Shuangfeng Han

    Inventor： Shuangfeng Han

    IPC: H04W4/00 ,  H04W72/04 ,  H04B7/06 ,  H04B7/04 ,  H04L1/00 ,  H01Q3/28

    CPC classification number: H04W72/046 ,  H01Q3/28 ,  H04B7/043 ,  H04B7/0617 ,  H04L1/0006

    Abstract: In one embodiment, a method for network entry in a wireless communication system includes acquiring ranging code configuration information, which represents the corresponding relationship among multiple beam vectors, multiple ranging sequences, and multiple ranging channels, determining an optimal downlink beam vector, and transmitting one of the ranging sequences corresponding to the optimal downlink beam vector to a Base Station (BS) through one of the ranging channels corresponding to the optimal downlink beam vector.

    Abstract translation: 在一个实施例中，一种用于在无线通信系统中进行网络输入的方法包括获取测距码配置信息，其表示多个波束矢量，多个测距序列和多个测距信道之间的对应关系，确定最佳下行链路波束向量，并发送一个 通过对应于最佳下行链路波束向量的测距信道之一，将与最佳下行链路波束向量相对应的测距序列发送到基站（BS）。

    Method and apparatus for triggering multicell MIMO schemes in multiple antenna system
    18.
    发明申请
    Method and apparatus for triggering multicell MIMO schemes in multiple antenna system 有权
    用于在多天线系统中触发多单元MIMO方案的方法和装置

    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。

    SYSTEM AND METHOD FOR PERFORMING HANDOVER IN WiMAX MOBILE COMMUNICATION SYSTEM
    19.
    发明申请
    SYSTEM AND METHOD FOR PERFORMING HANDOVER IN WiMAX MOBILE COMMUNICATION SYSTEM 有权
    用于在WiMAX移动通信系统中执行切换的系统和方法

    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。

    Multiple-input multiple-output communication system
    20.
    发明申请
    Multiple-input multiple-output communication system 审中-公开
    多输入多输出通信系统

    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

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