公开(公告)号：US08295414B2

公开(公告)日：2012-10-23

申请号：US12510120

申请日：2009-07-27

申请人： Hoon Lee ,  Young Jo Bang ,  Seungjae Bahng ,  Youn Ok Park

发明人： Hoon Lee ,  Young Jo Bang ,  Seungjae Bahng ,  Youn Ok Park

IPC分类号： H04L27/08

CPC分类号： H03G3/3052

摘要： The present invention relates to a device for gain control and a method for receiving a signal. The device for gain control according to the present invention includes a map interpreter that detects beamforming symbol periods in wireless signals, a power calculator that calculate the average power of the beamforming symbol periods in response to outputs of the map interpreter, a gain calculator that calculates gain control signals on the basis of the output signals of the power calculator, and a switch that outputs gains from the gain control signals, in which the wireless signals are corrected on the basis of the gains.

摘要翻译： 本发明涉及一种用于增益控制的装置和一种用于接收信号的方法。 根据本发明的用于增益控制的装置包括：地图解释器，其检测无线信号中的波束成形符号周期;功率计算器，其响应于地图解释器的输出计算波束成形符号周期的平均功率;计算增益计算器 基于功率计算器的输出信号的增益控制信号和从增益控制信号输出增益的开关，其中基于增益来校正无线信号。

公开(公告)号：US08134914B2

公开(公告)日：2012-03-13

申请号：US11721136

申请日：2005-11-10

申请人： Jun-Woo Kim ,  Su-Chang Chae ,  Young-Ha Lee ,  Eon-Young Hong ,  Youn-Ok Park

发明人： Jun-Woo Kim ,  Su-Chang Chae ,  Young-Ha Lee ,  Eon-Young Hong ,  Youn-Ok Park

IPC分类号： H04J11/00

CPC分类号： H04L5/0044 ,  H04L5/0048 ,  H04L5/0092

摘要： A subcarrier allocating apparatus allocating data to be transmitted to a plurality of orthogonal subcarriers in an orthogonal frequency division multiplexing (OFDM) system is provided. The apparatus includes a logical index generator generating a logical index for allocating a data subcarrier to a physical index, the logical index being included with only data subcarriers and the physical index indicating a location of a substantial subcarrier within a symbol, an intermediate index converter converting the logical index into an intermediate index by performing a given operation on the generated logical index and a pilot location constant, and a physical index converter converting the intermediate index into a physical index based on the number of data subcarriers on the left and right sides of a null subcarrier for insertion of a guard interval formed by the null subcarrier.

摘要翻译： 提供了一种在正交频分复用（OFDM）系统中分配要发送到多个正交子载波的数据的副载波分配装置。 该装置包括逻辑索引生成器，其生成用于将数据子载波分配给物理索引的逻辑索引，所述逻辑索引仅包括数据子载波，并且所述物理索引指示符号内的实质子载波的位置，中间索引转换器转换 通过对所生成的逻辑索引和导频位置常数执行给定的操作而将中间索引的逻辑索引转换成中间索引;以及物理索引转换器，其基于左侧和右侧的数据子载波的数量将中间索引转换为物理索引 用于插入由无效副载波形成的保护间隔的无效副载波。

公开(公告)号：US08116396B2

公开(公告)日：2012-02-14

申请号：US12496062

申请日：2009-07-01

申请人： Seungjae Bahng ,  Junghyun Kim ,  Youn Ok Park

发明人： Seungjae Bahng ,  Junghyun Kim ,  Youn Ok Park

IPC分类号： H04K1/10 ,  H04L27/28 ,  H04L27/00

CPC分类号： H04L25/0204 ,  H04L1/0656 ,  H04L25/0242 ,  H04L25/0246 ,  H04L25/0321 ,  H04L27/3488

摘要： Disclosed are a method for re-ordering multiple layers and detecting signals and a receiver using the same to be able to exert performance approaching a maximum likelihood scheme while having lower complexity than that of the maximum likelihood scheme in a multiple input multiple output (MIMO) antenna system in a form where each layer is modulated and transmitted with different modulation orders.

摘要翻译： 公开了一种重新排序多层和检测信号的方法，以及使用该方法的接收机能够在多输入多输出（MIMO）中具有接近最大似然方案的性能，同时具有比最大似然方案更低的复杂度的性能。 天线系统的形式，其中每个层被调制和传输不同的调制阶。

公开(公告)号：US08098777B2

公开(公告)日：2012-01-17

申请号：US11930047

申请日：2007-10-30

申请人： Seung-Jae Bahng ,  Young-Jo Bang ,  Youn-Ok Park

发明人： Seung-Jae Bahng ,  Young-Jo Bang ,  Youn-Ok Park

IPC分类号： H03D1/04 ,  H03D1/06 ,  H03K5/01 ,  H03K6/04 ,  H04B1/10 ,  H04L1/00 ,  H04L25/08

CPC分类号： H04B7/0413 ,  H04L1/0656 ,  H04L25/0204 ,  H04L25/0246

摘要： The present invention relates to a signal detection method and a receiving apparatus in a multiple input multiple output (MIMO) system. More particularly, the present invention relates to a signal detection device in a MIMO system using a spatial multiplexing (SM) method. In the signal detection method, a channel is estimated and layers are rearranged according to a predetermined layer arrangement rule. QR-decomposition is performed by using a rearranged system model, all constellation points in a symbol of a layer having the lowest reliability are considered, and symbols are detected by using a sequential interference elimination method.

摘要翻译： 本发明涉及多输入多输出（MIMO）系统中的信号检测方法和接收装置。 更具体地，本发明涉及使用空间复用（SM）方法的MIMO系统中的信号检测装置。 在信号检测方法中，估计信道并根据预定层布置规则重新布置层。 通过使用重排系统模型进行QR分解，考虑具有最低可靠性的层的符号中的所有星座点，并且通过使用顺序干扰消除方法来检测符号。

公开(公告)号：US08054909B2

公开(公告)日：2011-11-08

申请号：US12141539

申请日：2008-06-18

申请人： Seung Jae Bahng ,  Jae Kwon Kim ,  Hoon Heo ,  Hyun Myung Wu ,  Youn-Ok Park ,  Young Jo Bang ,  Hyeong Sook Park ,  Hoon Lee ,  Young Ha Lee ,  Jung Pil Choi

发明人： Seung Jae Bahng ,  Jae Kwon Kim ,  Hoon Heo ,  Hyun Myung Wu ,  Youn-Ok Park ,  Young Jo Bang ,  Hyeong Sook Park ,  Hoon Lee ,  Young Ha Lee ,  Jung Pil Choi

IPC分类号： H04L27/00 ,  G06Q30/00

CPC分类号： H04L25/067 ,  H04L25/03203 ,  H04L2025/03426

摘要： The present invention relates to a method of detecting a candidate vector and a method of detecting a transmission symbol using the same. According to an embodiment of the present invention, in a multiple input multiple output (MIMO) system using spatial multiplexing (SM), a receiver selects candidate vectors corresponding to a layer located at a last row among a plurality of rearranged layers, and sequentially ranks constellation dots of a next layer for each of the selected candidate vectors. Then, a plurality of arbitrary constellation dots are selected from the ranked constellation dots, accumulated costs of the arbitrary constellation dots are calculated, and a candidate vector is selected in correspondence with a constellation dot having a minimal accumulated cost. Then, a new arbitrary constellation dot is selected in place of the constellation dot selected as the candidate vector, an accumulated cost of the selected arbitrary constellation dot is compared with accumulated costs of the other arbitrary constellation dots, and another candidate vector is selected.

摘要翻译： 本发明涉及检测候选向量的方法和使用其的发送符号的检测方法。 根据本发明的实施例，在使用空间复用（SM）的多输入多输出（MIMO）系统中，接收机选择与多个重排层中位于最后一行的层相对应的候选向量，并且顺次排列 每个所选候选向量的下一层的星座点。 然后，从分级星座点中选择多个任意星座点，计算任意星座点的累积成本，并且与具有最小累积成本的星座点对应地选择候选矢量。 然后，代替选择为候选矢量的星座点，选择新的任意星座点，将所选择的任意星座点的累积成本与其他任意星座点的累积成本进行比较，并选择另一候选矢量。

公开(公告)号：US08036322B2

公开(公告)日：2011-10-11

申请号：US12141382

申请日：2008-06-18

申请人： Seung Jae Bahng ,  Jae Kwon Kim ,  Hoon Heo ,  Hyun Myung Wu ,  Youn-Ok Park ,  Dae Ho Kim ,  Kyung Yeol Sohn ,  Chang Wahn Yu ,  Jun-Woo Kim ,  Eon Young Hong

发明人： Seung Jae Bahng ,  Jae Kwon Kim ,  Hoon Heo ,  Hyun Myung Wu ,  Youn-Ok Park ,  Dae Ho Kim ,  Kyung Yeol Sohn ,  Chang Wahn Yu ,  Jun-Woo Kim ,  Eon Young Hong

IPC分类号： H04L27/06

CPC分类号： H04L1/0054

摘要： The present invention relates to a method of calculating a log-likelihood ratio and a method of detecting a transmission signal. According to the present invention, when a transmission symbol candidate vector is detected on the basis of a received signal, a threshold value and an ML metric of each transmission symbol candidate vector are calculated and the ML metric that is larger than the threshold value is updated by the threshold value. Further, a log-likelihood ratio of the transmission signal bit is calculated using the updated ML metric and the threshold value, and a transmission signal is detected using the log-likelihood ratio.

摘要翻译： 本发明涉及计算对数似然比的方法和检测发送信号的方法。 根据本发明，当基于接收信号检测到发送符号候选向量时，计算每个发送符号候选向量的阈值和ML度量，并且更新大于阈值的ML度量 通过阈值。 此外，使用更新的ML度量和阈值来计算发送信号比特的对数似然比，并且使用对数似然比来检测发送信号。

公开(公告)号：US08005182B2

公开(公告)日：2011-08-23

申请号：US11925686

申请日：2007-10-26

申请人： Hyeong-Sook Park ,  Jun-Woo Kim ,  Kyung-Yeol Sohn ,  Youn-Ok Park

发明人： Hyeong-Sook Park ,  Jun-Woo Kim ,  Kyung-Yeol Sohn ,  Youn-Ok Park

IPC分类号： H03D3/24

CPC分类号： H04L27/266 ,  H04L27/2659 ,  H04L27/2679

摘要： The present invention relates to an apparatus and method of compensating for a frequency offset in an orthogonal frequency division multiple access system that is capable of efficiently estimating and compensating for the frequency offset. A receiver of the orthogonal frequency division multiple access system can individually estimate a fractional frequency offset and an integer frequency offset by using a downlink preamble signal. Further, the receiver can compensate for the frequency offset by adding the integer frequency offset once after completely compensating for the fractional frequency offset. Therefore, it is possible to efficiently compensate for the frequency offset.

摘要翻译： 本发明涉及一种能够有效地估计和补偿频偏的正交频分多址系统中的频偏的补偿装置和方法。 正交频分多址系统的接收机可以通过使用下行链路前导码信号单独地估计分数频率偏移和整数频率偏移。 此外，接收机可以通过在完全补偿分数频率偏移之后加上整数频率偏移一次来补偿频率偏移。 因此，可以有效地补偿频率偏移。

公开(公告)号：US20110141962A1

公开(公告)日：2011-06-16

申请号：US12868164

申请日：2010-08-25

申请人： Jun-Woo Kim ,  Young Jo Bang ,  Youn Ok Park

发明人： Jun-Woo Kim ,  Young Jo Bang ,  Youn Ok Park

IPC分类号： H04H20/71

CPC分类号： H04H20/67 ,  H04L27/2649 ,  H04L27/2656

摘要： An apparatus for demodulating signals received from a plurality of base stations including a serving base station and a neighbor base station determines start timings of a serving cell signal transmitted from the serving base station and neighbor cell signals transmitted from the neighbor base stations, and verifies whether or not the neighbor cell signals that are earlier than the serving cell signal are provided on the basis of the determined start timings. Next, the apparatus selects a section where the reception energy of the symbol has the maximum level among symbols corresponding to signals of frames corresponding to the signals, respectively, as a demodulation section, and demodulates a multicast signal including the received signals on the basis of the selected demodulation section.

摘要翻译： 用于解调从包括服务基站和相邻基站的多个基站接收的信号的装置确定从服务基站发送的服务小区信号的开始定时和从邻近基站发送的相邻小区信号，并且验证是否 或者不是基于所确定的开始定时来提供早于服务小区信号的相邻小区信号。 接下来，该装置分别选择符号的接收能量分别与对应于信号的帧的信号相对应的符号中具有最大电平的部分作为解调部分，并且基于以下方式对包括接收信号的多播信号进行解调 所选解调部分。

公开(公告)号：US07953165B2

公开(公告)日：2011-05-31

申请号：US11667938

申请日：2005-09-07

申请人： Dae-Ho Kim ,  Jun-Woo Kim ,  Youn-Ok Park

发明人： Dae-Ho Kim ,  Jun-Woo Kim ,  Youn-Ok Park

IPC分类号： H04K1/10 ,  H04L27/28 ,  H04L27/00

CPC分类号： H04L27/2626 ,  H04L5/023

摘要： The present invention relates to a transmitter of an OFDMA system capable of controlling a gain for variation of subchannel allocation, and a method thereof. The transmitter includes a subchannel number determining unit, a modulator, a digital/analogue converter, and a gain controller controlling the gain. The subchannel number determining unit determines the number of subchannels in use according to communication environments, and the modulator modulates transmission data with reference to the number of subchannels determined by the subchannel number determining unit and outputs the modulated transmission data. The digital/analogue converter converts the transmission data into analogue data and transmits the converted analogue data through a transmit antenna. The gain controller controls gains of the transmission data according to gain values corresponding to the number of subchannels.

摘要翻译： 本发明涉及能够控制用于子信道分配变化的增益的OFDMA系统的发射机及其方法。 发射机包括子信道号确定单元，调制器，数/模转换器和控制增益的增益控制器。 子信道号确定单元根据通信环境确定正在使用的子信道的数量，并且调制器参照由子信道号确定单元确定的子信道的数量来调制发送数据，并输出调制的发送数据。 数字/模拟转换器将传输数据转换为模拟数据，并通过发送天线发送转换的模拟数据。 增益控制器根据对应于子信道数量的增益值控制传输数据的增益。

公开(公告)号：US07899138B2

公开(公告)日：2011-03-01

申请号：US11930013

申请日：2007-10-30

申请人： Young-Jo Bang ,  Chang-Wahn Yu ,  Seung-Jae Bahng ,  Dae-Ho Kim ,  Youn-Ok Park ,  Jee-Hwan Ahn ,  II Min Kim

发明人： Young-Jo Bang ,  Chang-Wahn Yu ,  Seung-Jae Bahng ,  Dae-Ho Kim ,  Youn-Ok Park ,  Jee-Hwan Ahn ,  II Min Kim

IPC分类号： H04L27/06 ,  H03D1/00

CPC分类号： H04L25/03242 ,  H04L1/0631

摘要： The present invention relates to a method of detecting a space-time code in a mobile communication system. When detecting a space-time code B for a plurality of transmitting antennas, an ML (maximum likelihood) metric, which is generally calculated by using a specific structure of a matrix B, is defined as a new ML metric by reducing a variable of the ML metric. Two dependent sphere decoding processes are performed and an intersection of the decoding results is calculated, and a signal is detected from the ML metric. Therefore, since detection of the space-time code B for the plurality of transmitting antennas is performed by using the newly defined ML metric, an amount of matrix calculated can be reduced, and a calculation amount can be reduced by performing the two dependent sphere decoding processes. Further, since a detection order of symbols is changed according to a channel situation, it is possible to improve the performance of the system.

摘要翻译： 本发明涉及一种在移动通信系统中检测时空码的方法。 当检测到多个发射天线的时空码B时，通常通过使用矩阵B的特定结构计算的ML（最大似然度）度量被定义为新的ML度量，通过减少 ML度量。 执行两个相关球体解码处理，并且计算解码结果的交点，并且从ML度量检测信号。 因此，由于通过使用新定义的ML度量来执行多个发送天线的空时码B的检测，所以可以减少计算出的矩阵的量，并且可以通过执行两个相关球体解码来减少计算量 过程。 此外，由于符号的检测顺序根据通道情况而改变，因此可以提高系统的性能。