公开(公告)号：US07411894B2

公开(公告)日：2008-08-12

申请号：US10666514

申请日：2003-09-18

申请人： Jung-Min Ro ,  Jingyl Liao ,  Hai Wang ,  Yongchun Chen ,  Fengming Cao ,  Pan-Yuh Joo ,  Dong-Seek Park

发明人： Jung-Min Ro ,  Jingyl Liao ,  Hai Wang ,  Yongchun Chen ,  Fengming Cao ,  Pan-Yuh Joo ,  Dong-Seek Park

IPC分类号： H04J11/00 ,  H04J3/00 ,  H04J1/00

CPC分类号： H04L27/2607

摘要： A transceiver system and method in an OFDM communication system which enables exact symbol synchronization acquisition and improves performance for frequency offset and channel estimation. In the apparatus, a guard interval filling unit copies data at a predetermined interval in an input data row inputted to be transmitted, and fills in the copied data in the preset guard interval in the input data row. A selection unit selectively receives an output data row outputted from the guard interval filling means and unique words having a constant amplitude and a non-periodic auto-correlation characteristic, and outputs the OFDM symbol in which the unique words are inserted in the output data row.

摘要翻译： OFDM通信系统中的收发机系统和方法，其能够精确地进行符号同步采集并提高频偏和信道估计的性能。 在该装置中，保护间隔填充单元以预定的时间间隔复制输入的要输出的输入数据列中的数据，并在输入数据行中以预设的保护间隔填充复制的数据。 选择单元选择性地接收从保护间隔填充装置输出的输出数据行和具有恒定幅度和非周期性自相关特性的唯一字，并将其中插入有唯一字的OFDM符号输出到输出数据行 。

公开(公告)号：US07289588B2

公开(公告)日：2007-10-30

申请号：US10726096

申请日：2003-12-02

申请人： Chang-Ho Suh ,  Chan-Byoung Chae ,  Ho-Kyu Choi ,  Jung-Min Ro ,  Pan-Yuh Joo

发明人： Chang-Ho Suh ,  Chan-Byoung Chae ,  Ho-Kyu Choi ,  Jung-Min Ro ,  Pan-Yuh Joo

IPC分类号： H04L7/00

CPC分类号： H04L27/2613 ,  H04L27/2607 ,  H04L27/2614 ,  H04L27/2656 ,  H04L27/2657 ,  H04L2027/0095

摘要： A method for generating a preamble sequence in an orthogonal frequency division multiplexing (OFDM) communication system having A subcarriers in a frequency domain. The method comprises generating a length -M×N preamble sequence, where M×N is less than A, by using a length-N Golay complementary sequence and a length-M Golay complementary sequence; and assigning elements constituting the preamble sequence to M×N subcarriers among the A subcarriers on a one-to-one mapping basis, assigning null data to the remaining subcarriers excluding the M×N subcarriers from the A subcarriers, and then IFFT-transforming the assigned result into time-domain data.

摘要翻译： 一种用于在频域中具有A个子载波的正交频分复用（OFDM）通信系统中产生前同步码序列的方法。 该方法包括通过使用长度-GGayay互补序列和长度M Gayay互补序列来生成MxN小于A的长度-MxN前导码序列; 并且在一对一映射的基础上，将构成前同步码序列的元素分配给A个子载波中的M×N个子载波，将空数据分配给来自A个子载波的除了M×N个子载波之外的剩余子载波，然后将分配结果IFFT变换为时间 域数据。

公开(公告)号：US07283498B2

公开(公告)日：2007-10-16

申请号：US10390320

申请日：2003-03-17

申请人： Jung-Min Ro ,  Pan-Yuh Joo

发明人： Jung-Min Ro ,  Pan-Yuh Joo

IPC分类号： H04Q7/00

CPC分类号： H04L5/0007 ,  H04L5/0037 ,  H04L5/0051 ,  H04L5/006 ,  H04L5/0085 ,  H04L25/0226

摘要： A method and apparatus for allocating pilot carriers adaptively in an OFDMA communication system are disclosed. To improve phase error estimation performance and optimize the number of pilot carriers allocated to each sub-channel, an OFDMA transmitter changes the number of pilot carriers for a sub-channel according to the status of the sub-channel. Consequently, less pilot carriers are allocated to a sub-channel in a good state, reducing power consumption and more pilot carriers are allocated to a sub-channel in a bad state, improving channel estimation performance despite increased power consumption.

摘要翻译： 公开了一种在OFDMA通信系统中自适应地分配导频载波的方法和装置。 为了提高相位误差估计性能并优化分配给每个子信道的导频载波的数量，OFDMA发射机根据子信道的状态改变子信道的导频载波数。 因此，较少的导频载波被分配给处于良好状态的子信道，降低功耗，并且将更多的导频载波分配给处于不良状态的子信道，尽管功耗增加，但改善了信道估计性能。

公开(公告)号：US07366090B2

公开(公告)日：2008-04-29

申请号：US10819502

申请日：2004-04-07

申请人： Chang-Ho Suh ,  Chan-Byoung Chae ,  Ho-Kyu Choi ,  Jung-Min Ro ,  Pan-Yuh Joo

发明人： Chang-Ho Suh ,  Chan-Byoung Chae ,  Ho-Kyu Choi ,  Jung-Min Ro ,  Pan-Yuh Joo

IPC分类号： H04J11/00

CPC分类号： H04L27/2613

摘要： A method for generating a preamble sequence in an orthogonal frequency division multiplexing (OFDM) communication system having A subcarriers in a frequency domain. The method comprises generating a length-2×M×N preamble sequence, where 2×M×N is less than A, by using a length-N Golay complementary sequence and a length-M Golay complementary sequence; and assigning elements constituting the preamble sequence to 2×M×N subcarriers among the A subcarriers on a one-to-one mapping basis, assigning null data to the remaining subcarriers excluding the 2×M×N subcarriers from the A subcarriers, and then IFFT-transforming the assigned result into time-domain data.

摘要翻译： 一种用于在频域中具有A个子载波的正交频分复用（OFDM）通信系统中产生前同步码序列的方法。 该方法包括通过使用长度-GGayay互补序列和长度-MGolay互补序列来生成2xMxN小于A的长度为2xMxN的前导码序列; 并且在一对一映射的基础上，将构成前同步码序列的元素分配给A×A×N×N个子载波中的2×M×N个子载波，从空载子载波分配空余数据到除了2×M×N个子载波以外的剩余子载波，然后将分配结果IFFT变换为时间 域数据。

公开(公告)号：US07912116B2

公开(公告)日：2011-03-22

申请号：US11528169

申请日：2006-09-27

申请人： Jae-Hyuk Jang ,  Eun-Taek Lim ,  Young-Bin Chang ,  Jung-Min Ro ,  Tae-Young Kim ,  Dong-Seek Park ,  Young-Kwon Cho ,  Joon-Young Choi

发明人： Jae-Hyuk Jang ,  Eun-Taek Lim ,  Young-Bin Chang ,  Jung-Min Ro ,  Tae-Young Kim ,  Dong-Seek Park ,  Young-Kwon Cho ,  Joon-Young Choi

IPC分类号： H04B1/38 ,  H04B3/36 ,  H04L12/66

CPC分类号： H04B7/15521 ,  H04B7/2606 ,  H04L27/2602

摘要： A frame configuration method and apparatus for sending data via an RS in a broadband wireless communication system are provided. In the reception mode, the RS monitors reception of data in an (n−1)th frame from an MS and reception of data in an nth frame from a BS. The RS classifies the data received from the MS and the data received from the BS as combinable data to be sent in combination or as non-combinable data to be sent separately, and stores the classified data distinguishably. When the RS transitions to a transmission mode, it determines whether to XOR-operate or mask the stored data. If the stored data can be masked, the RS XOR-operates the stored data and sends the masked data to the BS and the MS.

摘要翻译： 提供一种用于在宽带无线通信系统中通过RS发送数据的帧配置方法和装置。 在接收模式中，RS监视从MS接收第（n-1）帧中的数据，并从BS接收第n帧中的数据。 RS将从MS接收到的数据和从BS接收到的数据作为可组合数据组合或作为不可组合数据单独发送，并且可区分地存储分类数据。 当RS转换到传输模式时，它确定是否异或操作或掩蔽存储的数据。 如果存储的数据可以被屏蔽，则RS XOR操作存储的数据，并将掩蔽的数据发送到BS和MS。

公开(公告)号：US08670415B2

公开(公告)日：2014-03-11

申请号：US11500222

申请日：2006-08-07

申请人： Young-Bin Chang ,  Eun-Taek Lim ,  Jung-Min Ro ,  Jae-Hyuk Jang ,  Dong-Seek Park ,  Young-Kwon Cho ,  Seung-Hoon Park ,  Joon-Young Choi

发明人： Young-Bin Chang ,  Eun-Taek Lim ,  Jung-Min Ro ,  Jae-Hyuk Jang ,  Dong-Seek Park ,  Young-Kwon Cho ,  Seung-Hoon Park ,  Joon-Young Choi

IPC分类号： H04W4/00

CPC分类号： H04W36/0083 ,  H04B17/318 ,  H04B17/382 ,  H04W36/14 ,  H04W36/30

摘要： A method is provided for performing handoff in a communication system including a serving base station (BS) in communication with a mobile station (MS), at least one neighbor BS using a communication scheme different from a communication scheme of the serving BS, and the MS capable of communicating with the neighbor BS. The method includes compensating a signal strength of one of the serving BS and the neighbor BS, received at the MS, such that handoff decision is possible, and determining whether to perform a handoff of the MS, using the compensated signal strengths.

摘要翻译： 提供了一种用于在包括与移动站（MS）通信的服务基站（BS）的通信系统中执行切换的方法，使用不同于服务BS的通信方案的通信方案的至少一个相邻BS，以及 MS能够与邻居BS进行通信。 该方法包括补偿在MS处接收的服务BS和相邻BS之一的信号强度，使得切换判定成为可能，并且使用经补偿的信号强度来确定是否执行MS的切换。

公开(公告)号：US07460506B2

公开(公告)日：2008-12-02

申请号：US11141115

申请日：2005-05-31

申请人： Jung-Min Ro ,  Seung-Hoon Choi ,  Seok-Hyun Yoon ,  Chang-Ho Suh ,  Dong-Seek Park ,  Young-Kwon Cho

发明人： Jung-Min Ro ,  Seung-Hoon Choi ,  Seok-Hyun Yoon ,  Chang-Ho Suh ,  Dong-Seek Park ,  Young-Kwon Cho

IPC分类号： H04B7/216

CPC分类号： H04B1/7083

摘要： An apparatus and method for generating an octal code for identifying cells in a mobile communication system. In the octal code generating apparatus, a binary code generator generates a binary code with a predetermined minimum Hamming distance. A column permutator permutes the order of columns of the binary code in a predetermined interleaving method. A 3-bit combiner generates a plurality of codewords using the column-permuted binary code as a generator matrix and groups the bits of each of the codewords by threes. An octal code generator converts the 3-bit grouped binary codewords to octal code sequences.

摘要翻译： 一种用于在移动通信系统中生成用于识别小区的八进制码的装置和方法。 在八进制代码生成装置中，二进制代码生成器生成具有预定的最小汉明距离的二进制代码。 列排列器以预定的交织方法来排列二进制码列的顺序。 3位组合器使用列排列的二进制码作为生成器矩阵生成多个码字，并将每个码字的比特分组三分之一。 八进制代码生成器将3位分组的二进制码字转换为八进制码序列。

公开(公告)号：US07209460B2

公开(公告)日：2007-04-24

申请号：US11214312

申请日：2005-08-29

申请人： Frank Hanns Paul Fitzek ,  Carl Simon Wijting ,  Jeroen Theeuwes ,  Petar Popovski ,  Ramjee Prasad ,  Chang-Ho Suh ,  Seok-Hyun Yoon ,  Sung-Kwon Hong ,  Young-Kwon Cho ,  Young-Kyun Kim ,  Dong-Seek Park ,  Jung-Min Ro

发明人： Frank Hanns Paul Fitzek ,  Carl Simon Wijting ,  Jeroen Theeuwes ,  Petar Popovski ,  Ramjee Prasad ,  Chang-Ho Suh ,  Seok-Hyun Yoon ,  Sung-Kwon Hong ,  Young-Kwon Cho ,  Young-Kyun Kim ,  Dong-Seek Park ,  Jung-Min Ro

IPC分类号： H04Q7/20 ,  H04Q7/38

CPC分类号： H04W72/08 ,  H04W48/20 ,  H04W72/0453

摘要： A subcarrier assignment apparatus and a subcarrier assignment method, in which each of a plurality of Base Stations (BSs) constituting an Orthogonal Frequency Division Multiple Access (OFDMA) communication system provides services in the capacity of a serving BS to Mobile Stations (MSs). Channel quality information for the respective MSs are fed-back from the respective BSs. Subcarriers are assigned to the respective MSs according to a corresponding scheduling scheme in consideration of the channel quality information for the respective MSs, which are fed-back from the respective BSs, and then BSs which manage the subcarriers assigned to the respective MSs according to the corresponding scheduling scheme are selected. These operations provide site diversity to each of the MSs, and thus system capacity is maximized.

摘要翻译： 一种子载波分配装置和子载波分配方法，其中构成正交频分多址（OFDMA）通信系统的多个基站（BS）中的每个基站提供服务BS到移动台（MS）的能力的服务。 各个MS的信道质量信息从相应的BS反馈。 考虑到从各个BS反馈的各个MS的信道质量信息，根据相应的调度方案将子载波分配给相应的MS，然后根据相应的MS管理分配给各个MS的子载波的BS 选择相应的调度方案。 这些操作为每个MS提供站点分集，从而最大化系统容量。

公开(公告)号：US20060291414A1

公开(公告)日：2006-12-28

申请号：US11476986

申请日：2006-06-28

申请人： Eun-Taek Lim ,  Jung-Min Ro ,  Jae-Hyuk Jang ,  Young-Bin Chang ,  Chang-Ho Suh ,  Young-Kyun Kim ,  Dong-Seek Park ,  Young-Kwon Cho

发明人： Eun-Taek Lim ,  Jung-Min Ro ,  Jae-Hyuk Jang ,  Young-Bin Chang ,  Chang-Ho Suh ,  Young-Kyun Kim ,  Dong-Seek Park ,  Young-Kwon Cho

IPC分类号： H04Q7/00 ,  H04J3/24

CPC分类号： H04W48/18 ,  H04B7/12

摘要： A method for performing an initial operation of a mobile station (MS) that uses a first frequency band, in a frequency overlay communication system having the first frequency band including a plurality of sub-frequency bands. The method includes performing correlation on a full frequency band in units of the first frequency band, receiving broadcast information through a frequency band having a maximum correlation value, and performing an initial access to a base station (BS) through the frequency band having the maximum correlation value if a frequency bandwidth of the BS acquired from the broadcast information is narrower than or equal to a selected frequency bandwidth of the MS.

摘要翻译： 一种用于在具有包括多个子频带的第一频带的频率覆盖通信系统中执行使用第一频带的移动站（MS）的初始操作的方法。 该方法包括以第一频带为单位的全频段执行相关，通过具有最大相关值的频带接收广播信息，并通过具有最大相关值的频带对基站（BS）进行初始接入 如果从广播信息获取的BS的频带宽度窄于或等于该MS的选定频带宽度，则相关值。

公开(公告)号：US20060126491A1

公开(公告)日：2006-06-15

申请号：US11231255

申请日：2005-09-20

申请人： Jung-Min Ro ,  Young-Kwon Cho ,  Sung-Kwon Hong ,  Su-Ryong Jeong ,  Young-Kyun Kim ,  Dong-Seek Park

发明人： Jung-Min Ro ,  Young-Kwon Cho ,  Sung-Kwon Hong ,  Su-Ryong Jeong ,  Young-Kyun Kim ,  Dong-Seek Park

IPC分类号： H04J11/00

CPC分类号： H04L27/2647 ,  H04L27/261 ,  H04L27/2655

摘要： A cell search apparatus and method in an OFDM mobile communication system are provided. In the cell search apparatus, a symbol synchronization acquirer acquires OFDM symbol synchronization by performing CP correlation for a plurality of OFDM symbol intervals. A frame cell synchronization acquirer sorts received OFDM symbols according to the acquired OFDM symbol synchronization, and acquires frame cell synchronization by performing preamble correlation for a plurality of frame cell intervals. A pilot pattern detector sorts received frame cells according to the acquired frame cell synchronization, and detects a pilot pattern for identifying a base station by monitoring a plurality of frame cells.

摘要翻译： 提供了一种OFDM移动通信系统中的小区搜索装置和方法。 在小区搜索装置中，符号同步获取器通过对多个OFDM符号间隔执行CP相关来获取OFDM符号同步。 帧单元同步获取器根据获取的OFDM符号同步对接收到的OFDM符号进行分类，并且通过对多个帧单元间隔执行前导码相关来获取帧单元同步。 导频模式检测器根据所获取的帧单元同步对接收到的帧单元进行分类，并且通过监视多个帧单元来检测用于识别基站的导频模式。