公开(公告)号：US20130051485A1

公开(公告)日：2013-02-28

申请号：US13594370

申请日：2012-08-24

Applicant: Rakesh TAORI ,  Shuangfeng Han

Inventor： Rakesh TAORI ,  Shuangfeng Han

IPC: H04J11/00

CPC classification number: H04L27/2634 ,  H04L27/2601 ,  H04L27/2626 ,  H04L27/2646 ,  H04W72/04

Abstract: A communication apparatus and method in a wireless communication system that support multiple Orthogonal Frequency Division Multiplexing (OFDM) parameter sets. A method includes determining a respective OFDM parameter set for each of multiple Radio Frequency (RF) chains; and processing an OFDM signal in each of the multiple RF chains based on a parameter value defined in the respective OFDM parameter set.

Abstract translation: 一种支持多个正交频分复用（OFDM）参数集的无线通信系统中的通信装置和方法。 一种方法包括为多个射频（RF）链中的每一个确定相应的OFDM参数集合; 以及基于在各个OFDM参数集中定义的参数值来处理所述多个RF链中的每一个中的OFDM信号。

公开(公告)号：US20110032872A1

公开(公告)日：2011-02-10

申请号：US12806150

申请日：2010-08-06

Applicant: Shuangfeng Han ,  Zhen Wang ,  Ho-Kyu Choi ,  Cheng Shan

Inventor： Shuangfeng Han ,  Zhen Wang ,  Ho-Kyu Choi ,  Cheng Shan

IPC: H04W40/00

CPC classification number: H04B7/065 ,  H04B7/0639

Abstract: A method and apparatus reduce overhead of feedback in a closed loop Multiple Input Multiple Output (MIMO) system. A controller feeds back the long-term Precoder Matrix Index (PMI) to a serving base station under direction of the serving base station when the long term PMI feedback transmission is required, generates a new codebook using the long term PMI, and determines a short term PMI from the new codebook. A feedback transmitter feeds back the short-term PMI to the serving base station.

Abstract translation: 一种方法和装置降低了闭环多输入多输出（MIMO）系统中反馈的开销。 当需要长期PMI反馈传输时，控制器在服务基站的指示下向服务基站反馈长期预编码矩阵索引（PMI），使用长期PMI生成新的码本，并且确定短 来自新码本的PMI。 反馈发射机将短期PMI反馈给服务基站。

公开(公告)号：US20100002643A1

公开(公告)日：2010-01-07

申请号：US12498585

申请日：2009-07-07

Applicant: Shuangfeng Han ,  Eun-Yong Kim ,  Hyeon-Woo Lee ,  Ho-Kyu Choi ,  Joon-Ho Park ,  David Mazzarese ,  Bruno Clerckx ,  Song-Nam Hong

Inventor： Shuangfeng Han ,  Eun-Yong Kim ,  Hyeon-Woo Lee ,  Ho-Kyu Choi ,  Joon-Ho Park ,  David Mazzarese ,  Bruno Clerckx ,  Song-Nam Hong

IPC: H04B15/00 ,  H04B7/02 ,  H04W28/00

CPC classification number: H04B7/0417 ,  H04B7/024 ,  H04B7/0486 ,  H04B7/063 ,  H04B7/0639 ,  H04J11/0056

Abstract: A method for operating a Mobile Station (MS) in a Multiple Input Multiple Output (MIMO) wireless communication system is provided. The method includes measuring channel quality for a serving Base Station (BS), if the channel quality is less than a threshold, measuring interference power from one or more neighbor BSs, determining a Precoding Matrix Index (PMI) and a priority metric for each neighbor BS, and feeding back at least one of the PMI, a PMI type indicator, the priority metric, and the channel quality to the serving BS.

Abstract translation: 提供了一种用于在多输入多输出（MIMO）无线通信系统中操作移动台（MS）的方法。 该方法包括测量服务基站（BS）的信道质量，如果信道质量小于阈值，测量来自一个或多个相邻BS的干扰功率，确定每个邻居的预编码矩阵索引（PMI）和优先权度量 BS，并且向服务BS反馈PMI，PMI类型指示符，优先级度量和信道质量中的至少一个。

公开(公告)号：US10056957B2

公开(公告)日：2018-08-21

申请号：US13572438

申请日：2012-08-10

Applicant: Shuangfeng Han ,  Bruno Clerckx

Inventor： Shuangfeng Han ,  Bruno Clerckx

IPC: H04B7/06 ,  H04B7/0413 ,  H04L27/26 ,  H04L1/00

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.

公开(公告)号：US09432102B2

公开(公告)日：2016-08-30

申请号：US12907291

申请日：2010-10-19

Applicant: Sang-Woo Lee ,  Hee-Won Kang ,  Shuangfeng Han ,  David Mazzarese

Inventor： Sang-Woo Lee ,  Hee-Won Kang ,  Shuangfeng Han ,  David Mazzarese

IPC: H04B1/00 ,  H04B7/06 ,  H04B15/00 ,  H04B17/327 ,  H04B17/345

CPC classification number: H04B7/0639 ,  H04B17/327 ,  H04B17/345

Abstract: Provided is a device and a method for eliminating inter-cell interference in Multiple Input Multiple Output (MIMO) wireless communication system. The method for operating a user equipment for eliminating the inter-cell interference includes determining one or more optimum bands among bands not requested to be restricted from a neighboring cell, determining at least one of band and Precoding Matrix Index (PMI) to be requested to be restricted to the neighboring cell among the determined one or more optimum bands, and feeding back at least one of the band and PMI to be requested to be restricted to the neighboring cell to a serving base station.

Abstract translation: 提供了一种用于消除多输入多输出（MIMO）无线通信系统中的小区间干扰的装置和方法。 用于操作用于消除小区间干扰的用户设备的方法包括：确定从邻近小区未被请求的限制的频带中的一个或多个最佳频带，确定要请求的频带和预编码矩阵索引（PMI）中的至少一个 在所确定的一个或多个最佳频带中被限制到相邻小区，并将要被限制的要被限制的频带和PMI中的至少一个反馈给服务基站。

公开(公告)号：US09030949B2

公开(公告)日：2015-05-12

申请号：US12578353

申请日：2009-10-13

Applicant: Shuangfeng Han ,  Zhen Wang ,  Eunyong Kim ,  Clerckx Bruno

Inventor： Shuangfeng Han ,  Zhen Wang ,  Eunyong Kim ,  Clerckx Bruno

IPC: H04L12/26 ,  H04B7/06 ,  H04B7/04 ,  H04L25/03

CPC classification number: H04B7/0639 ,  H04B7/0478 ,  H04L2025/03426

Abstract: A Mobile Station (MS) apparatus and a Base Station (BS) apparatus, and methods for their operation in a wireless communication system, are provided. The method for operating the MS includes receiving Precoding Matrix Index (PMI) subset information from a BS, determining downlink channel quality of the BS, determining a PMI for the BS based on the PMI subset information and the determined downlink channel quality of the BS, and transmitting the determined PMI to the BS.

Abstract translation: 移动台（MS）装置和基站（BS）装置及其在无线通信系统中的操作方法。 用于操作MS的方法包括从BS接收预编码矩阵索引（PMI）子集信息，确定BS的下行链路信道质量，基于PMI子集信息和所确定的BS的下行链路信道质量来确定BS的PMI， 以及将确定的PMI发送到BS。

公开(公告)号：US09008213B2

公开(公告)日：2015-04-14

申请号：US12661155

申请日：2010-03-11

Applicant: Shuangfeng Han ,  Hyeon-Woo Lee ,  Ho-Kyu Choi ,  Mi-Hyun Lee

Inventor： Shuangfeng Han ,  Hyeon-Woo Lee ,  Ho-Kyu Choi ,  Mi-Hyun Lee

IPC: H04B15/00 ,  H04B7/02 ,  H04B7/06 ,  H04J11/00 ,  H04L25/03

CPC classification number: H04B7/024 ,  H04B7/0639 ,  H04J11/0033 ,  H04J11/0053 ,  H04L25/03343 ,  H04L2025/03808

Abstract: A multiple antenna system including a mobile station and a base station are operable to perform a method for transmitting control information for interference mitigation. A Mobile Station (MS) can transmit control information for interference mitigation. The MS determines a first Precoding Matrix Index (PMI) and a second PMI for interference from an adjacent Base Station (BS). Based on a correlation level from correlation values between one of the first PMI and second PMI and the remaining PMIs in the codebook, the MS determines a level of a subset of PMIs, and feeds back information indicating the correlation level.

Abstract translation: 包括移动站和基站的多天线系统可操作以执行用于发送用于干扰减轻的控制信息的方法。 移动台（MS）可以发送干扰减轻的控制信息。 MS确定来自相邻基站（BS）的第一预编码矩阵索引（PMI）和第二PMI用于干扰。 基于来自第一PMI和第二PMI中的一个与码本中的其余PMI之间的相关值的相关级，MS确定PMI的子集的级别，并且反馈指示相关级别的信息。

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。

公开(公告)号：US08576776B2

公开(公告)日：2013-11-05

申请号：US12806150

申请日：2010-08-06

Applicant: Shuangfeng Han ,  Zhen Wang ,  Ho-Kyu Choi ,  Cheng Shan

Inventor： Shuangfeng Han ,  Zhen Wang ,  Ho-Kyu Choi ,  Cheng Shan

IPC: H04W4/00

CPC classification number: H04B7/065 ,  H04B7/0639

Abstract: A method and apparatus reduce overhead of feedback in a closed loop Multiple Input Multiple Output (MIMO) system. A controller feeds back the long-term Precoder Matrix Index (PMI) to a serving base station under direction of the serving base station when the long term PMI feedback transmission is required, generates a new codebook using the long term PMI, and determines a short term PMI from the new codebook. A feedback transmitter feeds back the short-term PMI to the serving base station.

Abstract translation: 一种方法和装置降低了闭环多输入多输出（MIMO）系统中反馈的开销。 当需要长期PMI反馈传输时，控制器在服务基站的指示下向服务基站反馈长期预编码矩阵索引（PMI），使用长期PMI生成新的码本，并且确定短 来自新码本的PMI。 反馈发射机将短期PMI反馈给服务基站。

公开(公告)号：US08542635B2

公开(公告)日：2013-09-24

申请号：US12915814

申请日：2010-10-29

Applicant: Shuangfeng Han ,  Chi-Woo Lim

Inventor： Shuangfeng Han ,  Chi-Woo Lim

IPC: H04W72/04 ,  H04B7/06

CPC classification number: H04B7/024 ,  H04B17/12

Abstract: A calibration apparatus and a calibration method for multicell Multiple Input Multiple Output (MIMO) transmission in a multiple antenna system are provided. More particularly, an operating method of a Mobile Station (MS) for performing calibration for multicell MIMO transmission in a multiple antenna system includes negotiating a multi-Base Station (BS) joint processing with a BS, receiving a control message including information instructing multi-BS calibration for sounding based on the multi-BS joint processing, from the BS; when receiving the control message involving the multi-BS joint processing, generating a second sounding sequence by mapping estimated phases of downlink channels per subcarrier of BSs to a first sounding sequence allocated from the BS, and transmitting the second sounding sequence, including the phases of the downlink channels per subcarrier, over a sounding symbol interval with respect to each of the BSs involving the multi-BS joint processing. Hence, feedback overhead in the calibration of the multicell MIMO transmission can be reduced.

Abstract translation: 提供了一种用于多天线系统中的多输入多输入多输出（MIMO）传输的校准装置和校准方法。 更具体地说，用于在多天线系统中进行多单元MIMO传输的校准的移动台（MS）的操作方法包括：与BS协商多基站（BS）联合处理，接收包括指示多台天线的信息的控制消息， 基于BS的校准基于多BS联合处理，从BS; 当接收到涉及多BS联合处理的控制消息时，通过将BS的每个子载波的下行链路信道的估计相位映射到从BS分配的第一探测序列，并发送第二探测序列，生成第二探测序列， 相对于涉及多BS联合处理的每个BS的探测符号间隔，每个子载波的下行链路信道。 因此，可以减少多单元MIMO传输的校准中的反馈开销。