公开(公告)号：US08571121B2

公开(公告)日：2013-10-29

申请号：US12034723

申请日：2008-02-21

申请人： Shuangfeng Han ,  Seong-Taek Hwang ,  Han-Lim Lee

发明人： Shuangfeng Han ,  Seong-Taek Hwang ,  Han-Lim Lee

IPC分类号： H04L27/10

CPC分类号： H04L1/20 ,  H04B7/0443 ,  H04L1/0618 ,  Y02D70/444

摘要： 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.

摘要翻译： 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：US20080102881A1

公开(公告)日：2008-05-01

申请号：US11977612

申请日：2007-10-25

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

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

IPC分类号： H04Q7/20 ,  H04M1/00

CPC分类号： H01Q3/30 ,  H04B7/0443 ,  H04B7/0669 ,  H04B7/0691 ,  H04W52/346 ,  H04W52/42

摘要： 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.

摘要翻译： 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：US08060126B2

公开(公告)日：2011-11-15

申请号：US12018887

申请日：2008-01-24

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

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

IPC分类号： H04B7/00 ,  H04B1/66 ,  H04C7/02

CPC分类号： H04W52/42 ,  H04W52/20

摘要： 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.

摘要翻译： 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：US20080182611A1

公开(公告)日：2008-07-31

申请号：US12018887

申请日：2008-01-24

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

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

IPC分类号： H04B7/00

CPC分类号： H04W52/42 ,  H04W52/20

摘要： 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.

摘要翻译： 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：US07949360B2

公开(公告)日：2011-05-24

申请号：US11977612

申请日：2007-10-25

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

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

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

CPC分类号： H01Q3/30 ,  H04B7/0443 ,  H04B7/0669 ,  H04B7/0691 ,  H04W52/346 ,  H04W52/42

摘要： 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.

摘要翻译： 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：US20080205538A1

公开(公告)日：2008-08-28

申请号：US12034723

申请日：2008-02-21

申请人： Shuangfeng HAN ,  Seong-Taek Hwang ,  Han-Lim Lee

发明人： Shuangfeng HAN ,  Seong-Taek Hwang ,  Han-Lim Lee

IPC分类号： H04B7/12

CPC分类号： H04L1/20 ,  H04B7/0443 ,  H04L1/0618 ,  Y02D70/444

摘要： 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.

摘要翻译： 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：US20080107202A1

公开(公告)日：2008-05-08

申请号：US11906370

申请日：2007-10-02

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

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

IPC分类号： H04B7/02

CPC分类号： H04L27/18 ,  H04B7/0413 ,  H04B10/2575 ,  H04J13/00

摘要： 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

摘要翻译： 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：US07474858B2

公开(公告)日：2009-01-06

申请号：US10849070

申请日：2004-05-19

申请人： Han-Lim Lee ,  Gyu-Woong Lee ,  Yun-Je Oh ,  Seong-Taek Hwang

发明人： Han-Lim Lee ,  Gyu-Woong Lee ,  Yun-Je Oh ,  Seong-Taek Hwang

IPC分类号： H04B10/00

CPC分类号： H04B10/505 ,  H04B10/5055 ,  H04B10/508

摘要： A duobinary optical transmission device provides duobinary optical transmission with improved quality by a technique that does not require an electrical low pass filter LPF.A duobinary optical transmission device includes at least one semiconductor optical amplifier (SOA). A light source outputs a carrier wave as an optical signal. A precoder encodes an input of a non-return-to-zero (NRZ) electrical signal. An interferometer type semiconductor optical amplification unit modulates the carrier wave according to a change of an applied bias current coupled to the encoded signal. An optical band pass filter (OBPF) receives the phase-modulated optical signal from the semiconductor optical amplification unit, filters the received phase-modulated optical signal according to a designated band, and outputs an optical duobinary signal.

摘要翻译： 双二进制光传输装置通过不需要电气低通滤波器LPF的技术提供具有改进质量的双向光传输。双二进制光传输装置包括至少一个半导体光放大器（SOA）。 光源输出载波作为光信号。 预编码器对不归零（NRZ）电信号的输入进行编码。 干涉仪型半导体光放大单元根据耦合到编码信号的施加的偏置电流的变化来调制载波。 光带通滤波器（OBPF）从半导体光放大单元接收相位调制光信号，根据指定频带对接收的相位调制光信号进行滤波，并输出光双二进制信号。

公开(公告)号：US20070182655A1

公开(公告)日：2007-08-09

申请号：US11601422

申请日：2006-11-17

申请人： Han-Lim Lee ,  Seong-Taek Hwang ,  Sung-Hun Kim ,  Young-Sik Kim ,  Ji-Chai Jeong ,  Jung-Woo Baik

发明人： Han-Lim Lee ,  Seong-Taek Hwang ,  Sung-Hun Kim ,  Young-Sik Kim ,  Ji-Chai Jeong ,  Jung-Woo Baik

IPC分类号： H01Q11/10

CPC分类号： H01Q11/105

摘要： Disclosed is a broadband log-periodic dipole antenna, which has first and second radiating elements alternately and symmetrically arranged in both surfaces of a dielectric substrate according to the corresponding PCS frequency band, IMT-2000 frequency band, and wireless LAN (IEEE 802, 11a/b) frequency band, so that the first and second radiating elements are alternately supplied with signals to make the impedance matching, thereby producing high gain in each of the resonant frequency bands and preventing the distortion of the radiating patterns owing to the broadband characteristics. The arrangement of the first and second radiating elements in both surfaces of the dielectric substrate considerably also reduces the size of the antenna, thereby facilitating mass production with low cost.

摘要翻译： 公开了一种宽带对数周期偶极天线，其具有根据相应的PCS频带，IMT-2000频带和无线LAN在电介质基板的两个表面中交替地和对称地布置的第一和第二辐射元件（IEEE 802,11a / b）频带，使得第一和第二辐射元件交替地提供信号以使阻抗匹配，从而在每个谐振频带中产生高增益，并且由于宽带特性而防止辐射图案的失真。 第一和第二辐射元件在电介质衬底的两个表面中的布置显着地减小了天线的尺寸，从而以低成本促进了批量生产。

公开(公告)号：US20070133995A1

公开(公告)日：2007-06-14

申请号：US11607700

申请日：2006-12-01

申请人： Jae-Hoon Lee ,  Seong-Taek Hwang ,  Byung-Jik Kim ,  Gyu-Woong Lee ,  Hoon Kim ,  Sang-Ho Kim ,  Yong-Gyoo Kim ,  Sung-Kee Kim ,  Han-Lim Lee

发明人： Jae-Hoon Lee ,  Seong-Taek Hwang ,  Byung-Jik Kim ,  Gyu-Woong Lee ,  Hoon Kim ,  Sang-Ho Kim ,  Yong-Gyoo Kim ,  Sung-Kee Kim ,  Han-Lim Lee

IPC分类号： H04B10/00

CPC分类号： H04B10/25758

摘要： A remote access unit (RAU) apparatus, coupled to a central station (CS) of an RoF network through at least one optical fiber, and which RAU apparatus includes at least one antenna, includes: first and second antenna ports coupled to the at least one antenna; first and second optical fiber ports coupled to the at least one optical fiber; a first coupler for decoupling a first downstream signal of a first duplexing method and a second downstream signal of a second duplexing method, which are input through the first optical fiber port; a circulator for outputting the first downstream signal input from the first coupler to the first antenna port and outputting a first upstream signal of the first duplexing method input from the first antenna port to the second optical fiber port; and a second coupler for outputting the second downstream signal input from the first coupler to the second antenna port and outputting a second upstream signal of the second duplexing method input from the second antenna port to the second optical fiber port.

摘要翻译： 一种远程接入单元（RAU）装置，其通过至少一个光纤耦合到RoF网络的中心站（CS），并且所述RAU设备包括至少一个天线，包括：耦合到所述至少一个天线的第一和第二天线端口 一个天线 耦合到所述至少一个光纤的第一和第二光纤端口; 用于去耦第一双工方法的第一下行信号和通过第一光纤端口输入的第二双工方法的第二下行信号的第一耦合器; 输出从第一耦合器输入的第一下行信号到第一天线端口的循环器，并输出从第一天线端口输入到第二光纤端口的第一双工方式的第一上行信号; 以及第二耦合器，用于将从第一耦合器输入的第二下行信号输出到第二天线端口，并输出从第二天线端口输入到第二光纤端口的第二双工方法的第二上行信号。