公开(公告)号：US08060126B2

公开(公告)日：2011-11-15

申请号：US12018887

申请日：2008-01-24

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

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

IPC: H04B7/00 ,  H04B1/66 ,  H04C7/02

CPC classification number: H04W52/42 ,  H04W52/20

Abstract: Disclosed is a device for allocating transmission power using a symbol error rate (SER) for orthogonal space-time block codes (OSTBC) in a wireless communication system. The device includes: a plurality of antennas, which are distributed geographically and independently linked to a central processing unit; a receiver to select an optimum subset of the SER performance, using a preset power allocation to each of available antenna subset combinations, and sending the selected subset to a transmitter; and a central processing unit to allocate power by applying an OSTBC symbol having a unit average power to the optimum subset from the receiver.

Abstract translation: 公开了一种用于在无线通信系统中使用正交空时块码（OSTBC）的符号错误率（SER）来分配发送功率的装置。 该设备包括：多个天线，分布在地理上和独立地连接到中央处理单元; 使用对每个可用天线子组合的预设功率分配以及将所选择的子集发送到发射机的接收机来选择SER性能的最佳子集; 以及中央处理单元，通过从接收器向最佳子集应用具有单位平均功率的OSTBC符号来分配功率。

公开(公告)号：US20080248805A1

公开(公告)日：2008-10-09

申请号：US12080995

申请日：2008-04-07

Applicant: Shuangfeng Han ,  Seong-Taek Hwang

Inventor： Shuangfeng Han ,  Seong-Taek Hwang

IPC: H04Q7/20

CPC classification number: H04W16/02 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/006 ,  H04W16/10

Abstract: Disclosed is a method and an apparatus for assigning a subcarrier to a subcell serviced by a Distributed Antenna System (DAS) employing an Orthogonal Frequency Division Multiplexing Access (OFDMA) scheme in a broadband wireless access system. The method includes dividing an overall frequency band into multiple subcarrier bands, assigning the multiple subcarrier bands to respective Base Stations (BSs) without overlap among the BSs adjacent to one another in assigning the multiple subcarrier bands corresponding to the divided overall frequency band to the respective BSs and dividing the assigned subcarrier bands and selectively assigning the divided subcarrier bands to multiple Remote Stations (RSs) connected with the BSs through optical fibers.

Abstract translation: 公开了一种用于在宽带无线接入系统中将子载波分配给由使用正交频分复用接入（OFDMA）方案的分布式天线系统（DAS）服务的子小区的方法和装置。 该方法包括：将整个频带划分成多个子载波频带，将多个子载波频带分配给相应的基站（BS），在彼此相邻的BS之间不重叠，将与划分的总频带对应的多个子载波频带分配给相应的基站 BS并分配所分配的子载波频带，并且通过光纤选择性地将划分的子载波频带分配给与BS相连的多个远程站（RS）。

公开(公告)号：US20080182611A1

公开(公告)日：2008-07-31

申请号：US12018887

申请日：2008-01-24

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

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

IPC: H04B7/00

CPC classification number: H04W52/42 ,  H04W52/20

Abstract: Disclosed is a device for allocating transmission power using a symbol error rate (SER) for orthogonal space-time block codes (OSTBC) in a wireless communication system. The device includes: a plurality of antennas, which are distributed geographically and independently linked to a central processing unit; a receiver to select an optimum subset of the SER performance, using a preset power allocation to each of available antenna subset combinations, and sending the selected subset to a transmitter; and a central processing unit to allocate power by applying an OSTBC symbol having a unit average power to the optimum subset from the receiver.

Abstract translation: 公开了一种用于在无线通信系统中使用正交空时块码（OSTBC）的符号错误率（SER）来分配发送功率的装置。 该设备包括：多个天线，分布在地理上和独立地连接到中央处理单元; 使用对每个可用天线子组合的预设功率分配以及将所选择的子集发送到发射机的接收机来选择SER性能的最佳子集; 以及中央处理单元，通过从接收器向最佳子集应用具有单位平均功率的OSTBC符号来分配功率。

公开(公告)号：US09001918B2

公开(公告)日：2015-04-07

申请号：US13594370

申请日：2012-08-24

Applicant: Rakesh Taori ,  Shuangfeng Han

Inventor： Rakesh Taori ,  Shuangfeng Han

IPC: H04L27/10 ,  H04L27/26

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：US20120327872A1

公开(公告)日：2012-12-27

申请号：US13531308

申请日：2012-06-22

Applicant: Shuangfeng Han

Inventor： Shuangfeng Han

IPC: H04W72/02

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）。

公开(公告)号：US08488480B2

公开(公告)日：2013-07-16

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: G01R31/08 ,  G06F11/00 ,  G08C15/00 ,  H04J1/16 ,  H04J3/14 ,  H04L1/00

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：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。

公开(公告)号：US20120190378A1

公开(公告)日：2012-07-26

申请号：US13358386

申请日：2012-01-25

Applicant: Shuangfeng Han ,  Chi-Woo Lim

Inventor： Shuangfeng Han ,  Chi-Woo Lim

IPC: H04W24/00 ,  H04W72/08 ,  H04W40/00

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：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）。

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。