公开(公告)号：US20070211832A1

公开(公告)日：2007-09-13

申请号：US11710852

申请日：2007-02-26

申请人： Seo-Goo Lee ,  Tae-Gon Kim ,  Min-Cheol Park ,  Yun-Sang Park ,  Bong-Gee Song ,  In-Hyoung Kim

发明人： Seo-Goo Lee ,  Tae-Gon Kim ,  Min-Cheol Park ,  Yun-Sang Park ,  Bong-Gee Song ,  In-Hyoung Kim

IPC分类号： H04L27/06 ,  H03D1/00

CPC分类号： H04L25/023

摘要： Provided is a channel estimation apparatus and method. In the channel estimation apparatus, a channel estimator performs channel estimation onto a received symbol and output a channel estimation result. The channel estimation result is stored in an estimation buffer along with a channel estimation result compensated in a preamble phase compensator. The preamble phase compensator receives a channel estimation result for pilot subcarriers of a data symbol and a preamble channel estimation result from the estimation buffer, acquires a phase rotation value between them, and compensates the preamble channel estimation result with the phase rotation value. When FCH and DL-MAP are demodulated, pilot subcarriers in the Nth PUSC symbol have been used to estimate the channel of the Nth PUSC symbol.

摘要翻译： 提供了一种信道估计装置和方法。 在信道估计装置中，信道估计器对所接收的符号进行信道估计并输出信道估计结果。 信道估计结果与在前置码相位补偿器中补偿的信道估计结果一起存储在估计缓冲器中。 前导码相位补偿器从估计缓冲器接收数据符号的导频子载波的信道估计结果和前导信道估计结果，获取相位旋转值，并以相位旋转值补偿前导信道估计结果。 当FCH和DL-MAP被解调时，第N个PUSC符号中的导频子载波已被用于估计第N个PUSC符号的信道。

公开(公告)号：US07801252B2

公开(公告)日：2010-09-21

申请号：US11710852

申请日：2007-02-26

申请人： Seo-Goo Lee ,  Tae-Gon Kim ,  Min-Cheol Park ,  Yun-Sang Park ,  Bong-Gee Song ,  In-Hyoung Kim

发明人： Seo-Goo Lee ,  Tae-Gon Kim ,  Min-Cheol Park ,  Yun-Sang Park ,  Bong-Gee Song ,  In-Hyoung Kim

IPC分类号： H03D1/00 ,  H04L27/06

CPC分类号： H04L25/023

摘要： Provided is a channel estimation apparatus and method. In the channel estimation apparatus, a channel estimator performs channel estimation onto a received symbol and output a channel estimation result. The channel estimation result is stored in an estimation buffer along with a channel estimation result compensated in a preamble phase compensator. The preamble phase compensator receives a channel estimation result for pilot subcarriers of a data symbol and a preamble channel estimation result from the estimation buffer, acquires a phase rotation value between them, and compensates the preamble channel estimation result with the phase rotation value. When FCH and DL-MAP are demodulated, pilot subcarriers in the Nth PUSC symbol have been used to estimate the channel of the Nth PUSC symbol.

摘要翻译： 提供了一种信道估计装置和方法。 在信道估计装置中，信道估计器对所接收的符号进行信道估计并输出信道估计结果。 信道估计结果与在前置码相位补偿器中补偿的信道估计结果一起存储在估计缓冲器中。 前导码相位补偿器从估计缓冲器接收数据符号的导频子载波的信道估计结果和前导信道估计结果，获取相位旋转值，并以相位旋转值补偿前导信道估计结果。 当FCH和DL-MAP被解调时，第N PUSC符号中的导频子载波已被用于估计第N个PUSC符号的信道。

公开(公告)号：US07746940B2

公开(公告)日：2010-06-29

申请号：US11481032

申请日：2006-07-05

申请人： Hae-Dong Yeon ,  Young-Hak Kim ,  Jae-Hwan Chang ,  Jae-Yong Lee ,  Min-Cheol Park ,  Ji-Yun Seol ,  Tae-Gon Kim ,  Jun-Kyu Kang ,  In-Hyoung Kim ,  Yun-Sang Park ,  Bong-Gee Song

发明人： Hae-Dong Yeon ,  Young-Hak Kim ,  Jae-Hwan Chang ,  Jae-Yong Lee ,  Min-Cheol Park ,  Ji-Yun Seol ,  Tae-Gon Kim ,  Jun-Kyu Kang ,  In-Hyoung Kim ,  Yun-Sang Park ,  Bong-Gee Song

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L27/2607 ,  H04L5/023 ,  H04L27/2634

摘要： A method and apparatus for processing time windowing to transmit a signal in a Broadband Wireless Access (BWA) communication system based on Orthogonal Frequency Division Multiple Access (OFDMA). A signal of a first interval included in a previous symbol prior to a current symbol is stored as a signal of a previous symbol interval. The current symbol includes a guard interval and an effective symbol interval subsequent to the guard interval. The current symbol is windowed by overlapping the stored signal of the first interval with a signal of a second interval included in the current symbol subsequent to the previous symbol. A windowed signal is transmitted.

摘要翻译： 一种用于在基于正交频分多址（OFDMA）的宽带无线接入（BWA）通信系统中处理时间窗口以发送信号的方法和装置。 包括在当前符号之前的先前符号中的第一间隔的信号被存储为先前符号间隔的信号。 当前符号包括保护间隔和保护间隔之后的有效符号间隔。 通过将所存储的第一间隔的信号与包含在先前符号之后的当前符号中的第二间隔的信号相叠加来将当前符号加窗。 发送窗口信号。

公开(公告)号：US20070009056A1

公开(公告)日：2007-01-11

申请号：US11481032

申请日：2006-07-05

申请人： Hae-Dong Yeon ,  Young-Hak Kim ,  Jae-Hwan Chang ,  Jae-Yong Lee ,  Min-Cheol Park ,  Ji-Yun Seol ,  Tae-Gon Kim ,  Jun-Kyu Kang ,  In-Hyoung Kim ,  Yun-Sang Park ,  Bong-Gee Song

发明人： Hae-Dong Yeon ,  Young-Hak Kim ,  Jae-Hwan Chang ,  Jae-Yong Lee ,  Min-Cheol Park ,  Ji-Yun Seol ,  Tae-Gon Kim ,  Jun-Kyu Kang ,  In-Hyoung Kim ,  Yun-Sang Park ,  Bong-Gee Song

IPC分类号： H04K1/10

CPC分类号： H04L27/2607 ,  H04L5/023 ,  H04L27/2634

摘要： A method and apparatus for processing time windowing to transmit a signal in a Broadband Wireless Access (BWA) communication system based on Orthogonal Frequency Division Multiple Access (OFDMA). A signal of a first interval included in a previous symbol prior to a current symbol is stored as a signal of a previous symbol interval. The current symbol includes a guard interval and an effective symbol interval subsequent to the guard interval. The current symbol is windowed by overlapping the stored signal of the first interval with a signal of a second interval included in the current symbol subsequent to the previous symbol. A windowed signal is transmitted.

摘要翻译： 一种用于在基于正交频分多址（OFDMA）的宽带无线接入（BWA）通信系统中处理时间窗口以发送信号的方法和装置。 包括在当前符号之前的先前符号中的第一间隔的信号被存储为先前符号间隔的信号。 当前符号包括保护间隔和保护间隔之后的有效符号间隔。 通过将所存储的第一间隔的信号与包含在先前符号之后的当前符号中的第二间隔的信号相叠加来将当前符号加窗。 发送窗口信号。

公开(公告)号：US20060115025A1

公开(公告)日：2006-06-01

申请号：US11288707

申请日：2005-11-29

申请人： In-Hyoung Kim ,  Tae-Gon Kim ,  Yun-Sang Park ,  Bong-Gee Song

发明人： In-Hyoung Kim ,  Tae-Gon Kim ,  Yun-Sang Park ,  Bong-Gee Song

IPC分类号： H04L27/06

CPC分类号： H04L27/2656 ,  H04L27/2678

摘要： Disclosed is an apparatus and method for estimating a start point of a frame in a wireless communication system. The method includes the steps of receiving a frame and estimating the start of the frame by searching for an interval or point of time during or at which a correlation between preambles is at its maximum. At this time, to in order to estimate the start of the frame, a cyclic prefix is used. Thus, a correlation between a cyclic prefix and the last interval of a symbol, which is the same as the cyclic prefix, is calculated and an interval or point of time having the maximum correlation is estimated as the start point of the cyclic prefix. Therefore, the start point of the frame can be accurately estimated based on the start point of the cyclic prefix.

公开(公告)号：US07623582B2

公开(公告)日：2009-11-24

申请号：US11288707

申请日：2005-11-29

申请人： In-Hyoung Kim ,  Tae-Gon Kim ,  Yun-Sang Park ,  Bong-Gee Song

发明人： In-Hyoung Kim ,  Tae-Gon Kim ,  Yun-Sang Park ,  Bong-Gee Song

IPC分类号： H04L27/28

CPC分类号： H04L27/2656 ,  H04L27/2678

摘要： Disclosed is an apparatus and method for estimating a start point of a frame in a wireless communication system. The method includes the steps of receiving a frame and estimating the start of the frame by searching for an interval or point of time during or at which a correlation between preambles is at its maximum. At this time, to in order to estimate the start of the frame, a cyclic prefix is used. Thus, a correlation between a cyclic prefix and the last interval of a symbol, which is the same as the cyclic prefix, is calculated and an interval or point of time having the maximum correlation is estimated as the start point of the cyclic prefix. Therefore, the start point of the frame can be accurately estimated based on the start point of the cyclic prefix.

摘要翻译： 公开了一种用于估计无线通信系统中的帧起始点的装置和方法。 该方法包括以下步骤：通过搜索前导码之间的相关性处于其最大值的时间间隔或时间点来接收帧并估计帧的开始。 此时，为了估计帧的开始，使用循环前缀。 因此，计算与循环前缀相同的循环前缀和符号的最后间隔之间的相关性，并且将具有最大相关性的间隔或时间点估计为循环前缀的开始点。 因此，可以基于循环前缀的开始点来准确地估计帧的起始点。

公开(公告)号：US20060146948A1

公开(公告)日：2006-07-06

申请号：US11325125

申请日：2006-01-04

申请人： Min-Cheol Park ,  Yun-Sang Park ,  Bong-Gee Song ,  Tae-Gon Kim

发明人： Min-Cheol Park ,  Yun-Sang Park ,  Bong-Gee Song ,  Tae-Gon Kim

IPC分类号： H04K1/10

CPC分类号： H04L5/0048 ,  H04L25/0224

摘要： A method and apparatus are provided for adaptively allocating pilots in a pilot-aided channel estimation system. A multipath delay is measured between a base station (BS) and a mobile station (MS). A distribution density of pilots of a signal to be transmitted between the BS and the MS is controlled. When the multipath delay is large, the pilot distribution density is relatively raised. However, when the multipath delay is small, the pilot distribution density is relatively lowered. The pilot distribution density is adaptively controlled according to the multipath delay, such that resources are effectively utilized and throughput is improved.

公开(公告)号：US07634014B2

公开(公告)日：2009-12-15

申请号：US11325125

申请日：2006-01-04

申请人： Min-Cheol Park ,  Yun-Sang Park ,  Bong-Gee Song ,  Tae-Gon Kim

发明人： Min-Cheol Park ,  Yun-Sang Park ,  Bong-Gee Song ,  Tae-Gon Kim

IPC分类号： H04K1/10

CPC分类号： H04L5/0048 ,  H04L25/0224

摘要： A method and apparatus are provided for adaptively allocating pilots in a pilot-aided channel estimation system. A multipath delay is measured between a base station (BS) and a mobile station (MS). A distribution density of pilots of a signal to be transmitted between the BS and the MS is controlled. When the multipath delay is large, the pilot distribution density is relatively raised. However, when the multipath delay is small, the pilot distribution density is relatively lowered. The pilot distribution density is adaptively controlled according to the multipath delay, such that resources are effectively utilized and throughput is improved.

摘要翻译： 提供了一种用于在导频辅助信道估计系统中自适应地分配导频的方法和装置。 在基站（BS）和移动台（MS）之间测量多径延迟。 控制BS和MS之间要发送的信号的导频的分布密度。 当多径延迟大时，导频分布密度相对提高。 然而，当多径延迟小时，导频分布密度相对降低。 根据多径延迟自适应地控制导频分布密度，有效利用资源，提高吞吐量。

公开(公告)号：US07532902B2

公开(公告)日：2009-05-12

申请号：US11312172

申请日：2005-12-20

申请人： In-Chun Lim ,  Tae-Gon Kim ,  Yun-Sang Park ,  Bong-Gee Song

发明人： In-Chun Lim ,  Tae-Gon Kim ,  Yun-Sang Park ,  Bong-Gee Song

IPC分类号： H04W68/00 ,  H04J11/00 ,  H04W4/00

CPC分类号： H04L27/2685 ,  H04B1/70735 ,  H04L27/2655 ,  H04L27/2675 ,  H04L27/2684

摘要： Disclosed is an apparatus and a method for performing a cell search in a wireless communication system. A subscriber station calculates the power of subcarriers according to their positions in a preamble signal of a frequency domain and identifies a segment of a cell to which the subscriber station belongs. Then, the subscriber station correlates PN sequences, which correspond to the segment of the cell that has been identified, with the preamble signal of the frequency domain. Therefore, the number of calculations for determining correlation values in a cell search is remarkably reduced.

摘要翻译： 公开了一种用于在无线通信系统中执行小区搜索的装置和方法。 用户台根据频域的前导信号中的位置来计算子载波的功率，并且识别用户站所属的小区的一段。 然后，用户台将对应于已经识别的小区的段的PN序列与频域的前导信号相关联。 因此，用于确定小区搜索中的相关值的计算次数显着降低。

公开(公告)号：US20060133321A1

公开(公告)日：2006-06-22

申请号：US11312172

申请日：2005-12-20

申请人： In-Chun Lim ,  Tae-Gon Kim ,  Yun-Sang Park ,  Bong-Gee Song

发明人： In-Chun Lim ,  Tae-Gon Kim ,  Yun-Sang Park ,  Bong-Gee Song

IPC分类号： H04Q7/00

CPC分类号： H04L27/2685 ,  H04B1/70735 ,  H04L27/2655 ,  H04L27/2675 ,  H04L27/2684

摘要： Disclosed is an apparatus and a method for performing a cell search in a wireless communication system. A subscriber station calculates the power of subcarriers according to their positions in a preamble signal of a frequency domain and identifies a segment of a cell to which the subscriber station belongs. Then, the subscriber station correlates PN sequences, which correspond to the segment of the cell that has been identified, with the preamble signal of the frequency domain. Therefore, the number of calculations for determining correlation values in a cell search is remarkably reduced.