公开(公告)号：US07623569B2

公开(公告)日：2009-11-24

申请号：US10958485

申请日：2004-10-05

申请人： Jae-Hwan Chang ,  Yun-Sang Park ,  Sang-Hoon Sung ,  Chan-Young Kim

发明人： Jae-Hwan Chang ,  Yun-Sang Park ,  Sang-Hoon Sung ,  Chan-Young Kim

IPC分类号： H04B3/46

CPC分类号： H04L1/206 ,  H04B1/1027 ,  H04B17/345 ,  H04L27/2647

摘要： A method and apparatus for estimating interference and noise power in an orthogonal frequency division multiplexing/orthogonal frequency division multiple access/discrete multi-tone (OFDM/OFDMA/DMT) system is disclosed. A correlator correlates a plurality of sub-carriers with a preset reference sequence on an element-by-element basis and outputs a result of the correlation. A signal noise producer calculates a difference between a correlation value associated with each of the plurality of sub-carriers output from the correlator and a correlation value produced from at least one adjacent sub-carrier and outputs a result of the calculation. An interference and noise power producer produce interference and noise power from the difference between the correlation values calculated by the signal noise producer.

摘要翻译： 公开了一种在正交频分复用/正交频分多址/离散多音（OFDM / OFDMA / DMT）系统中估计干扰和噪声功率的方法和装置。 相关器在逐个元素的基础上将多个子载波与预设的参考序列进行相关，并输出相关的结果。 信号噪声生成器计算与从相关器输出的多个子载波中的每一个相关联的相关值与从至少一个相邻子载波产生的相关值之间的差，并输出计算结果。 干扰和噪声功率发生器根据由信号噪声产生器计算的相关值之间的差产生干扰和噪声功率。

公开(公告)号：US20050058058A1

公开(公告)日：2005-03-17

申请号：US10909076

申请日：2004-07-30

申请人： Min-Hee Cho ,  Bong-Gee Song ,  Sang-Hoon Sung ,  Kwang-Seop Eom

发明人： Min-Hee Cho ,  Bong-Gee Song ,  Sang-Hoon Sung ,  Kwang-Seop Eom

IPC分类号： H04J11/00 ,  H04L5/02 ,  H04L12/28 ,  H04L12/56

CPC分类号： H04W74/002 ,  H04L5/023 ,  H04W72/1278 ,  H04W74/04 ,  H04W74/08 ,  H04W74/0833

摘要： Disclosed is a method for controlling an operational state of at least one subscriber stations in an OFDM/OFDMA communication system having ranging slots and ranging codes to be used for rangings. The subscriber station performing in a Null state, an initial ranging if an initial ranging request occurs, and transitioning from the Null state to an Idle state if the initial ranging is successful; transitioning to an Access state if a bandwidth request ranging request occurs in the Idle state, and performing in the Access state the bandwidth request ranging based on a random access technique; transitioning from the Access state to a Busy state if the random access-based bandwidth request ranging is successful, performing the bandwidth request ranging based on a scheduled access technique if the bandwidth request ranging request occurs in the Busy state, and transmitting data if the scheduled access-based bandwidth request ranging is successful; and transitioning to a Hold state if the data transmission is ended in the Busy state, and performing the scheduled access-based bandwidth request ranging if the bandwidth request ranging request occurs in the Hold state.

摘要翻译： 公开了一种用于控制OFDM / OFDMA通信系统中至少一个用户台的操作状态的方法，该OFDM / OFDMA通信系统具有用于测距的测距时隙和测距码。 执行Null状态的用户台，如果发生初始测距请求，则初始测距，如果初始测距成功，则从Null状态转换到空闲状态; 如果在空闲状态下发生带宽请求测距请求，则转换到接入状态，并且在接入状态下，根据随机接入技术进行带宽请求测距; 如果基于随机接入的带宽请求测距成功，则从接入状态转换到忙状态，如果带宽请求测距请求出现在忙状态，则基于调度的接入技术来执行带宽请求测距，并且如果调度 基于访问的带宽请求测距成功; 并且如果数据传输在忙状态下结束，则转换到保持状态，并且如果带宽请求测距请求发生在保持状态，则执行基于调度的基于接入的带宽请求测距。

公开(公告)号：US20050152480A1

公开(公告)日：2005-07-14

申请号：US10958485

申请日：2004-10-05

申请人： Jae-Hwan Chang ,  Yun-Sang Park ,  Sang-Hoon Sung ,  Chan-Young Kim

发明人： Jae-Hwan Chang ,  Yun-Sang Park ,  Sang-Hoon Sung ,  Chan-Young Kim

IPC分类号： H04J11/00 ,  H04B1/10 ,  H04B17/00 ,  H04L1/20 ,  H04L27/26 ,  H04Q1/20

CPC分类号： H04L1/206 ,  H04B1/1027 ,  H04B17/345 ,  H04L27/2647

摘要： A method and apparatus for estimating interference and noise power in an orthogonal frequency division multiplexing/orthogonal frequency division multiple access/discrete multi-tone (OFDM/OFDMA/DMT) system is disclosed. A correlator correlates a plurality of sub-carriers with a preset reference sequence on an element-by-element basis and outputs a result of the correlation. A signal noise producer calculates a difference between a correlation value associated with each of the plurality of sub-carriers output from the correlator and a correlation value produced from at least one adjacent sub-carrier and outputs a result of the calculation. An interference and noise power producer produce interference and noise power from the difference between the correlation values calculated by the signal noise producer.

摘要翻译： 公开了一种在正交频分复用/正交频分多址/离散多音（OFDM / OFDMA / DMT）系统中估计干扰和噪声功率的方法和装置。 相关器在逐个元素的基础上将多个子载波与预设的参考序列进行相关，并输出相关的结果。 信号噪声生成器计算与从相关器输出的多个子载波中的每一个相关联的相关值与从至少一个相邻子载波产生的相关值之间的差，并输出计算结果。 干扰和噪声功率发生器根据由信号噪声产生器计算的相关值之间的差产生干扰和噪声功率。

公开(公告)号：US20070213098A1

公开(公告)日：2007-09-13

申请号：US11708657

申请日：2007-02-20

申请人： Sang-Hoon Sung ,  Yong-Seok Kim ,  Young-Hoon Kwon

发明人： Sang-Hoon Sung ,  Yong-Seok Kim ,  Young-Hoon Kwon

IPC分类号： H04M1/00

CPC分类号： H04W16/28

摘要： An apparatus and a method for transmitting a signal in a wireless communication system are disclosed. A method for transmitting a signal by a Base Station (BS) in a wireless communication system includes estimating an uplink channel using a signal received from a Mobile Station (MS), determining a beam coefficient for each of sub-carriers constituting a predetermined frequency band based on the estimated uplink channel, forming a beam for the predetermined frequency band by multiplying each sub-carrier by the beam coefficient, and transmitting a signal using the formed beam.

摘要翻译： 公开了一种用于在无线通信系统中发送信号的装置和方法。 一种用于在无线通信系统中由基站（BS）发送信号的方法包括使用从移动站（MS）接收的信号来估计上行链路信道，确定构成预定频带的每个子载波的波束系数 基于估计的上行链路信道，通过将每个子载波乘以波束系数来形成用于预定频带的波束，并且使用形成的波束来发送信号。

公开(公告)号：US20060008037A1

公开(公告)日：2006-01-12

申请号：US11172539

申请日：2005-06-30

申请人： Jae-Hwan Chang ,  Yun-Sang Park ,  Sang-Hoon Sung

发明人： Jae-Hwan Chang ,  Yun-Sang Park ,  Sang-Hoon Sung

IPC分类号： H03D1/04 ,  H04L1/00

CPC分类号： H04L1/20 ,  H04L25/022 ,  H04L25/03159 ,  H04L27/2647 ,  H04L2025/03414

摘要： In an apparatus for estimating a Carrier-to-Interference-and-Noise Ratio (CINR) in a communication system, received signals are blocked based on sub-carriers with similar channel characteristics. Interference and noise levels and true received signal levels are computed on a block-by-block basis from the blocked received signals. CINRs are estimated on a block-by-block basis using ratios between the computed interference and noise levels and the computed true received signal levels. The apparatus can estimate a CINR for all channels even when the channel characteristics of the sub-carriers of the received signals are not similar to each other.