公开(公告)号：US07394793B2

公开(公告)日：2008-07-01

申请号：US11077853

申请日：2005-03-11

申请人： Won-Il Roh ,  Jae-Ho Jeon ,  Soon-Young Yoon ,  Seung-Joo Maeng

发明人： Won-Il Roh ,  Jae-Ho Jeon ,  Soon-Young Yoon ,  Seung-Joo Maeng

IPC分类号： H04B7/216

CPC分类号： H04L5/0048 ,  H04J13/0003 ,  H04J13/0048 ,  H04J13/18 ,  H04L5/0026 ,  H04L27/2613

摘要： A preamble generation method and apparatus are provided for improving transmit diversity by changing a preamble structure in a broadband wireless communication system using multiple antennas based on a multiple input multiple output (MIMO) scheme. First pilot tones associated with different antennas are selected. The first pilot tones are multiplied by different first Walsh codes. Second pilot tones associated with the same antenna are sequentially selected along a frequency axis. The second pilot tones are multiplied by a second Walsh code. Preambles are generated by assigning, to at least two symbol durations, output signals multiplied by the first and second Walsh codes. Consecutive pilot tones during each of the at least two symbol durations are spaced by one pilot tone, and code streams of the first and second Walsh codes are alternately multiplied by the pilot tones. The preamble structure has orthogonality between the antennas using frequency, time and code domains.

摘要翻译： 提供了一种前导码生成方法和装置，用于通过基于多输入多输出（MIMO）方案通过使用多个天线改变宽带无线通信系统中的前导码结构来改善发送分集。 选择与不同天线相关联的第一导频音调。 第一导频音乘以不同的第一沃尔什码。 沿着频率轴依次选择与相同天线相关联的第二导频音。 第二个导频音乘以第二个沃尔什码。 通过将至少两个符号持续时间分配给乘以第一和第二沃尔什码的输出信号来产生前导码。 在至少两个符号持续时间中的每一个期间的连续导频音调间隔一个导频音，并且第一和第二沃尔什码的码流交替地乘以导频音。 前导码结构在使用频率，时间和码域的天线之间具有正交性。

公开(公告)号：US20060176803A1

公开(公告)日：2006-08-10

申请号：US11329615

申请日：2006-01-11

申请人： Jeong-Tae Oh ,  Won-Il Roh ,  Kyun-Byoung Ko ,  Jae-Ho Jeon ,  Seung-Joo Maeng ,  Chan-Byoung Chae ,  Hong-Sil Jeong ,  Sung-Ryul Yun ,  Myung-Kwang Byun

发明人： Jeong-Tae Oh ,  Won-Il Roh ,  Kyun-Byoung Ko ,  Jae-Ho Jeon ,  Seung-Joo Maeng ,  Chan-Byoung Chae ,  Hong-Sil Jeong ,  Sung-Ryul Yun ,  Myung-Kwang Byun

IPC分类号： H04J11/00

CPC分类号： H04L1/0058 ,  H04L1/0025 ,  H04L1/0073 ,  H04L5/0007 ,  H04L5/0046

摘要： An apparatus is provided for transmitting uplink fast feedback information in a wireless communication system. In the apparatus, a channel encoder generates uplink fast feedback information to transmit, and outputs 3-bit codewords being set according to the fast feedback information. A noncoherent modulator modulates transmission symbols corresponding to the codewords using a noncoherent modulation scheme, and allocates the modulated transmission symbols to each of subcarrier bundles. An inverse fast Fourier transform (IFFT) unit IFFT-processes a transmission signal comprised of the subcarrier bundles before transmission.

公开(公告)号：US20060023680A1

公开(公告)日：2006-02-02

申请号：US11176930

申请日：2005-07-07

申请人： Jeong-Tae Oh ,  Won-II Roh ,  Kyun-Byoung Ko ,  Seung-Joo Maeng ,  Jae-Ho Jeon ,  Pan-Yuh Joo ,  Chan-Byoung Chae ,  Hong-Sil Jeong ,  Sung-Ryul Yun

发明人： Jeong-Tae Oh ,  Won-II Roh ,  Kyun-Byoung Ko ,  Seung-Joo Maeng ,  Jae-Ho Jeon ,  Pan-Yuh Joo ,  Chan-Byoung Chae ,  Hong-Sil Jeong ,  Sung-Ryul Yun

IPC分类号： H04Q7/24

CPC分类号： H04B7/0613 ,  H04L1/0066 ,  H04L1/007 ,  H04L1/0071 ,  H04L1/0668 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/0226

摘要： A method and system for transmitting reference signals in a BWA communication system using a first transmit antenna, a second transmit antenna, and a plurality of sub-carriers. Each of the sub-carriers occupies a sub-frequency domain. In the method, reference signals for identifying a first transmit antenna are transmitted through a second predetermined number of sub-carriers in a first mini sub-channel transmitted through the first transmit antenna and occupied by a predetermined time domain and sub-frequency domains of a first predetermined number of sub-carriers, and reference signals for identifying a second transmit antenna are transmitted through the second predetermined number of the sub-carriers in a second mini sub-channel transmitted through the second transmit antenna and occupied by the time domain and the sub-frequency domains of the first predetermined number of sub-carriers.

摘要翻译： 一种使用第一发射天线，第二发射天线和多个子载波在BWA通信系统中发送参考信号的方法和系统。 每个子载波占用一个子频域。 在该方法中，用于识别第一发射天线的参考信号通过第一预定数量的子载波在通过第一发射天线发送并由预定时域占据的第一小型子信道中传输， 第一预定数量的子载波和用于识别第二发射天线的参考信号通过第二预定数量的子载波在通过第二发射天线发射并被时域占用的第二小型子信道中发送，并且 第一预定数量的副载波的子频域。

公开(公告)号：US20050286449A1

公开(公告)日：2005-12-29

申请号：US11167666

申请日：2005-06-27

申请人： Hee-Sang Seo ,  Jae-Ho Jeon ,  Jeong-Heon Kim ,  Myung-Kwang Byun ,  Seung-Joo Maeng ,  Soon-Young Yoon ,  Chi-Woo Lim ,  Sie-Joon Cho ,  Young-Bin Chang

发明人： Hee-Sang Seo ,  Jae-Ho Jeon ,  Jeong-Heon Kim ,  Myung-Kwang Byun ,  Seung-Joo Maeng ,  Soon-Young Yoon ,  Chi-Woo Lim ,  Sie-Joon Cho ,  Young-Bin Chang

IPC分类号： H04J11/00 ,  H04B7/00 ,  H04B7/212 ,  H04B7/26 ,  H04J3/00 ,  H04J3/06

CPC分类号： H04W56/0045 ,  H04B7/2656 ,  H04J3/0682

摘要： A method for setting a guard interval for distinguishing a transition from a downlink period to an uplink period in a mobile communication system employing a time division duplexing (TDD) scheme, the mobile communication system including a plurality of base stations. The method includes the steps of, simultaneously transmitting by each of the base stations downlink signals from transmission antennas at a first time point based on a processing delay time for a signal to be transmitted; simultaneously receiving by each of the base stations an uplink signal at reception antennas at a second time point; and setting a time interval from the first time point to the second time point as a guard interval for distinguishing a transition from an uplink period to a downlink period.

摘要翻译： 一种用于在采用时分双工（TDD）方案的移动通信系统中设置用于区分从下行链路周期到上行链路周期的转换的保护间隔的方法，所述移动通信系统包括多个基站。 该方法包括以下步骤：根据要发送的信号的处理延迟时间，在第一时间点同时从每个基站发送来自发送天线的下行链路信号; 在每个基站同时接收在第二时间点的接收天线的上行链路信号; 并且将从第一时间点到第二时间点的时间间隔设置为用于区分从上行链路周期到下行链路周期的转换的保护间隔。

公开(公告)号：US20050286402A1

公开(公告)日：2005-12-29

申请号：US11141155

申请日：2005-05-31

申请人： Myung-Kwang Byun ,  Jae-Ho Jeon ,  Seung-Joo Maeng ,  Jeong-Heon Kim ,  Hee-Sang Seo ,  Jeong-Tae Oh

发明人： Myung-Kwang Byun ,  Jae-Ho Jeon ,  Seung-Joo Maeng ,  Jeong-Heon Kim ,  Hee-Sang Seo ,  Jeong-Tae Oh

IPC分类号： H04L27/26 ,  H04J11/00 ,  H04L1/16 ,  H04L1/18

CPC分类号： H04L27/30 ,  H04L1/1692 ,  H04L1/1829 ,  H04L1/1867

摘要： A method and apparatus for transmitting uplink acknowledge information (ACK) in a communication system using an orthogonal frequency division multiple access (OFDMA) scheme. The method includes receiving a data bit for the uplink ACK; outputting codewords corresponding to the data bit; performing quadrature phase shift keying (QPSK) modulation on symbols for ACK vector indexes corresponding to the codewords for the received data bit; performing inverse fast Fourier transform (IFFT) on a transmission signal having subcarrier clusters to which the modulated transmission symbols are allocated; and transmitting the IFFT-processed transmission signal.

摘要翻译： 一种用于在使用正交频分多址（OFDMA）方案的通信系统中发送上行确认信息（ACK）的方法和装置。 该方法包括接收用于上行链路ACK的数据比特; 输出与该数据比特对应的码字; 对与所接收的数据位的码字相对应的ACK向量索引的符号执行正交相移键控（QPSK）调制; 对具有分配有调制的发送符号的子载波簇的发送信号进行快速傅立叶逆变换（IFFT）; 并发送经IFFT处理的传输信号。

公开(公告)号：US20050253652A1

公开(公告)日：2005-11-17

申请号：US11126322

申请日：2005-05-11

申请人： Yoo-Seung Song ,  Jae-Hyok Lee ,  Seung-Hwan Lee ,  Ki-Hwan Hwang ,  Jae-Ho Jeon ,  Seung-Joo Maeng

发明人： Yoo-Seung Song ,  Jae-Hyok Lee ,  Seung-Hwan Lee ,  Ki-Hwan Hwang ,  Jae-Ho Jeon ,  Seung-Joo Maeng

IPC分类号： H04B7/26 ,  H03F1/26 ,  H03F1/32

CPC分类号： H03F1/3247

摘要： A digital predistortion apparatus is provided for predistorting a nonlinear characteristic caused by a wideband power amplifier that amplifies a input signal. The digital predistortion apparatus includes a predistorter, connected to the power amplifier via a digital-to-analog converter (DAC) and a frequency up-converter, for receiving the input signal and compensating for the nonlinear characteristic using a look-up table that depends upon a change in output power of the power amplifier. The digital predistortion apparatus further includes look-up table (LUT) updating block for adaptively updating the look-up table by comparing a feedback signal output from the power amplifier, connected thereto via an analog-to-digital converter (ADC), with the input signal output from the predistorter.

摘要翻译： 提供一种用于预失真由放大输入信号的宽带功率放大器引起的非线性特性的数字预失真装置。 数字预失真装置包括一个预失真器，它通过一个数/模转换器（DAC）和一个上变频器连接到功率放大器，用于接收输入信号，并使用一个查找表来补偿非线性特性 在功率放大器的输出功率变化时。 数字预失真装置还包括查找表（LUT）更新块，用于通过将经由模数转换器（ADC）连接到其的功率放大器输出的反馈信号与自动更新查找表与 来自预失真器的输入信号输出。

公开(公告)号：US08149957B2

公开(公告)日：2012-04-03

申请号：US12061146

申请日：2008-04-02

申请人： Jeong-Tae Oh ,  Myung-Kwang Byun ,  Jae-Ho Jeon ,  Seung-Joo Maeng

发明人： Jeong-Tae Oh ,  Myung-Kwang Byun ,  Jae-Ho Jeon ,  Seung-Joo Maeng

IPC分类号： H04L27/06

CPC分类号： H04L25/0224 ,  H04L5/0048 ,  H04L25/0244 ,  H04L25/03305 ,  H04L25/03318

摘要： An apparatus and a method for interference cancellation in a broadband wireless communication system are provided. A receiving apparatus includes an estimator, a channel compensator, and a demodulator. The estimator estimates channels of a desired signal and at least one interference signal, estimates noise, calculates a mean interference power of each interference signal, and calculates a mean noise power. The channel compensator channel-compensates burst data. The demodulator calculates a noise variance value by adding the mean noise power to the at least one mean interference power and creates Log Likelihood Ratio (LLR) by demodulating the channel-compensated data.

摘要翻译： 提供了一种用于宽带无线通信系统中的干扰消除的装置和方法。 接收装置包括估计器，信道补偿器和解调器。 估计器估计期望信号的信道和至少一个干扰信号，估计噪声，计算每个干扰信号的平均干扰功率，并且计算平均噪声功率。 通道补偿器通道补偿突发数据。 解调器通过将平均噪声功率加到至少一个平均干扰功率来计算噪声方差值，并通过解调信道补偿数据产生对数似然比（LLR）。

公开(公告)号：US20110158123A1

公开(公告)日：2011-06-30

申请号：US13043073

申请日：2011-03-08

申请人： Jee-Hyun KIM ,  Jeong-Tae Oh ,  Hoon Huh ,  Jae-Ho Jeon ,  Soon-Young Yoon ,  Seung-Joo Maeng

发明人： Jee-Hyun KIM ,  Jeong-Tae Oh ,  Hoon Huh ,  Jae-Ho Jeon ,  Soon-Young Yoon ,  Seung-Joo Maeng

IPC分类号： H04L12/26

CPC分类号： H04L5/0053 ,  H04L1/0026 ,  H04L5/0007 ,  H04L5/0039 ,  H04L5/0041 ,  H04L5/0044 ,  H04L5/006 ,  H04L5/0082 ,  H04L5/0096

摘要： A method and Mobile Subscriber Station (MSS) are provided for transmitting Channel Quality Information (CQI) in a wireless communication system using an Orthogonal Frequency Division Multiple Access (OFDMA) scheme. A Carrier to Interference and Noise Ratio (CINR) of at least two bands are measured; each of the at least two bands including a plurality of adjacent subcarriers for a band Adaptive Modulation and Coding (AMC) operation. A Report Response (REP-RSP) message including first information related to the measured CINR is sent. Second information related to a differential CINR of the at least two bands is sent via a Channel Quality Information Channel (CQICH).

摘要翻译： 提供一种方法和移动用户站（MSS），用于在使用正交频分多址（OFDMA）方案的无线通信系统中传送信道质量信息（CQI）。 测量至少两个波段的载波干扰和噪声比（CINR）; 所述至少两个频带中的每一个包括用于频带自适应调制和编码（AMC）操作的多个相邻子载波。 发送包括与测量的CINR相关的第一信息的报告响应（REP-RSP）消息。 通过信道质量信息信道（CQICH）发送与至少两个频带的差分CINR相关的第二信息。

公开(公告)号：US07668253B2

公开(公告)日：2010-02-23

申请号：US11074040

申请日：2005-03-07

申请人： In-Seok Hwang ,  Jae-Ho Jeon ,  Soon-Young Yoon ,  Sang-Hoon Sung ,  Seung-Joo Maeng ,  Hoon Huh ,  Jae-Hee Cho ,  Jeong-Heon Kim

发明人： In-Seok Hwang ,  Jae-Ho Jeon ,  Soon-Young Yoon ,  Sang-Hoon Sung ,  Seung-Joo Maeng ,  Hoon Huh ,  Jae-Hee Cho ,  Jeong-Heon Kim

IPC分类号： H04L27/00 ,  H04B1/38 ,  H04L23/00 ,  H04B7/208

CPC分类号： H04L5/0046 ,  H04J11/005 ,  H04L1/0003 ,  H04L1/0009 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0042 ,  H04W72/00 ,  H04W72/02 ,  H04W72/0453

摘要： A method for allocating a subchannel in a transmitter of an Orthogonal Frequency Division Multiple Access (OFDMA) cellular communication system in which an entire frequency band includes a plurality of bands, each of the bands includes a plurality of bins, and each of the bins includes a plurality of subcarriers. The method includes dividing a predetermined time interval into an Adaptive Modulation and Coding (AMC) subchannel time interval and a diversity subchannel time interval; selecting any one of the plurality of bands in the AMC subchannel time interval; selecting a predetermined number of bins among the plurality of bins in the selected band; and allocating the selected bins to the AMC subchannel.

摘要翻译： 一种用于在正交频分多址（OFDMA）蜂窝通信系统的发射机中分配子信道的方法，其中整个频带包括多个频带，每个频带包括多个分组，并且每个分机包括 多个子载波。 该方法包括将预定时间间隔划分为自适应调制和编码（AMC）子信道时间间隔和分集子信道时间间隔; 在AMC子信道时间间隔内选择多个频带中的任何一个; 在所选择的频带中选择多个信元之间的预定数量的信息组; 并将所选择的分组分配给AMC子信道。

公开(公告)号：US07660607B2

公开(公告)日：2010-02-09

申请号：US11268893

申请日：2005-11-08

申请人： Jeong-Tae Oh ,  Won-Il Roh ,  Kyun-Byoung Ko ,  Jae-Ho Jeon ,  Sung-Ryul Yun ,  Hong-Sil Jeong ,  Chan-Byoung Chae ,  Seung-Joo Maeng

发明人： Jeong-Tae Oh ,  Won-Il Roh ,  Kyun-Byoung Ko ,  Jae-Ho Jeon ,  Sung-Ryul Yun ,  Hong-Sil Jeong ,  Chan-Byoung Chae ,  Seung-Joo Maeng

IPC分类号： H04M1/00 ,  H04B1/00 ,  H04B7/00 ,  H04J11/00

CPC分类号： H04L1/0625 ,  H04B7/0417 ,  H04B7/0634 ,  H04B7/0639 ,  H04B7/0689 ,  H04B7/0697 ,  H04L1/0026 ,  H04L1/0029 ,  H04L1/0643 ,  H04L1/0662 ,  H04L1/0668 ,  H04L1/0687

摘要： Disclosed is a method for using various multiple antenna schemes in a baseband wireless access system is provided. According to the method, a downlink MAP message is constructed in order to support various multiple antenna schemes based on a multiple-input multiple output (MIMO), which is one of the multiple antenna schemes, so that compatibility with exiting MIMO technology having no MIMO feedback can be achieved and overhead occurring in transmission of an MAP information element can be reduced. Further, it is possible to efficiently support spatial multiplexing technology capable of transmitting multiple layers having different modulation and coding in a MIMO system.

摘要翻译： 公开了一种在基带无线接入系统中使用各种多天线方案的方法。 根据该方法，构建下行链路MAP消息以便支持基于作为多个天线方案之一的多输入多输出（MIMO）的各种多天线方案，从而与不具有MIMO的退出MIMO技术的兼容性 可以实现反馈并且可以减少在MAP信息元素的传输中发生的开销。 此外，可以有效地支持能够在MIMO系统中发送具有不同调制和编码的多个层的空间复用技术。