公开(公告)号：US20080250303A1

公开(公告)日：2008-10-09

申请号：US12064175

申请日：2005-12-05

Applicant: Su-Chang Chae ,  Youn-Ok Park

Inventor： Su-Chang Chae ,  Youn-Ok Park

IPC: H03M13/23 ,  G06F11/08

CPC classification number: H03M13/4169 ,  H03M13/4107 ,  H03M13/413 ,  H03M13/6502

Abstract: The present invention relates to a decoder for tail-biting convolution codes and a method thereof. The decoder receives an encoding bit sequence in a convolutional encoding method from a channel, generates an expanded encoding bit sequence, Viterbi decodes the expanded encoding bit sequence, and generates decoded data. In addition, the decoder selects a central bit sequence of the decoded data, rearranges the central bit sequence, and generates final decoded data. Accordingly, the decoder has a simplified configuration for decoding the bit sequence encoded in the tail biting convolutional encoding method, and the decoder also decodes a bit sequence encoded in a zero-tail convolutional encoding method.

Abstract translation: 本发明涉及一种用于尾部卷积码的解码器及其方法。 解码器从信道中以卷积编码方式接收编码比特序列，生成扩展编码比特序列，维特比解码扩展编码比特序列，并产生解码数据。 此外，解码器选择解码数据的中央位序列，重新排列中央位序列，并生成最终解码数据。 因此，解码器具有用于解码以尾巴卷积编码方法编码的比特序列的简化配置，并且解码器还对以零尾卷积编码方式编码的比特序列进行解码。

公开(公告)号：US20080209298A1

公开(公告)日：2008-08-28

申请号：US11722041

申请日：2005-11-28

Applicant: Su-Chang Chae ,  Youn-Ok Park ,  Jun-Woo Kim

Inventor： Su-Chang Chae ,  Youn-Ok Park ,  Jun-Woo Kim

IPC: H04L1/08 ,  G06F11/14

CPC classification number: H04L1/1845 ,  H04L1/0071 ,  H04L1/1812 ,  H04L1/1819 ,  H04L1/1867

Abstract: In a decoding apparatus in a portable Internet terminal, a channel encoded symbol received from a transmitter is decoded by one of a chase-combining scheme and a code-combining scheme selected based on an ID value of the subpacket indicating a start position of the symbol. In this case, the chase-combining scheme is partly used for the encoded symbol of the information bit. With such a mode, decoding can be performed at a low code rate.

Abstract translation: 在便携式因特网终端中的解码装置中，从发送器接收到的信道编码符号通过追踪合并方案和基于子包的ID值选择的代码组合方案中的一个进行解码，指示符号的开始位置 。 在这种情况下，追踪合成方案被部分地用于信息比特的编码符号。 利用这种模式，可以以低码率执行解码。

公开(公告)号：US20080137782A1

公开(公告)日：2008-06-12

申请号：US11930047

申请日：2007-10-30

Applicant: Seung-Jae BAHNG ,  Young-Jo BANG ,  Youn-Ok PARK

Inventor： Seung-Jae BAHNG ,  Young-Jo BANG ,  Youn-Ok PARK

IPC: H03D1/00 ,  H04L1/02

CPC classification number: H04B7/0413 ,  H04L1/0656 ,  H04L25/0204 ,  H04L25/0246

Abstract: 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.

Abstract translation: 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：US20080019455A1

公开(公告)日：2008-01-24

申请号：US11793160

申请日：2005-09-08

Applicant: Dae-Ho Kim ,  Youn-Ok Park

Inventor： Dae-Ho Kim ,  Youn-Ok Park

IPC: H04L27/28

CPC classification number: H04W52/10 ,  H04L27/2626 ,  H04W52/08 ,  H04W52/146 ,  H04W52/245 ,  H04W52/246 ,  H04W52/52

Abstract: The present invention relates to a mobile station of an OFDMA system and a transmit power control method thereof. The mobile station includes a modulator, a variable gain amplifier, a gain controller, and a power controller. The modulator modulates transmit data according to the number of allocated subchannels, and the variable gain amplifier amplifies the transmit data. The gain controller controls a gain of the transmit data inputted to the variable gain amplifier according to a subchannel gain value corresponding to the number of subchannels. The power controller calculates a power control gain for controlling power of the transmit data except the subchannel gain value based on the signal received from the base station and outputs the power control gain to the variable gain amplifier.

Abstract translation: 本发明涉及OFDMA系统的移动台及其发射功率控制方法。 移动台包括调制器，可变增益放大器，增益控制器和功率控制器。 调制器根据分配的子信道的数量调制发送数据，可变增益放大器放大发送数据。 增益控制器根据对应于子通道数量的子通道增益值来控制输入到可变增益放大器的发送数据的增益。 功率控制器基于从基站接收的信号计算用于控制除了子信道增益值之外的发送数据的功率的功率控制增益，并将功率控制增益输出到可变增益放大器。

公开(公告)号：US20070248002A1

公开(公告)日：2007-10-25

申请号：US10583167

申请日：2004-11-03

Applicant: Jun-Woo Kim ,  Young-Hoon Kim ,  Su-Chang Chae ,  Youn-Ok Park

Inventor： Jun-Woo Kim ,  Young-Hoon Kim ,  Su-Chang Chae ,  Youn-Ok Park

IPC: H04J11/00

CPC classification number: H04L5/023 ,  H04L1/0003 ,  H04L1/0009 ,  H04L27/2608

Abstract: Disclosed is a demodulation apparatus for receiving signals by an adaptive modulation and coding method, and demodulating the signals, in an OFDMA based packet communication system, comprising: a QAM demapper for performing QAM demapping to the received signals by a modulation method using a maximum modulation ratio, until modulation methods for each of sub-channels are analyzed; a slot buffer for storing the data outputted from the QAM demapper; a channel decoder for decoding the data stored in the slot buffer and analyzing modulation methods for each sub-channels and transferring the analyzed modulation methods to the QAM demapper; and in at the same time, reading valid data from the data stored in the slot buffer, based on the analyzed modulation methods for each sub-channels, and demodulating the valid data.

Abstract translation: 公开了一种用于在基于OFDMA的分组通信系统中通过自适应调制和编码方法接收信号并解调信号的解调装置，包括：QAM解映射器，用于通过使用最大调制的调制方法对所接收的信号进行QAM解映射 比例，直到分析每个子信道的调制方法; 用于存储从QAM解映射器输出的数据的时隙缓冲器; 用于解码存储在时隙缓冲器中的数据并分析每个子信道的调制方法并将分析的调制方法传送到QAM解映射器的信道解码器; 并且同时，基于针对每个子信道的分析的调制方法和解调有效数据，从存储在时隙缓冲器中的数据读取有效数据。

公开(公告)号：US20070147225A1

公开(公告)日：2007-06-28

申请号：US11636809

申请日：2006-12-11

Applicant: Chang-Wahn Yu ,  Youn-Ok Park

Inventor： Chang-Wahn Yu ,  Youn-Ok Park

IPC: H04J11/00 ,  H04J1/00

CPC classification number: H04L27/2657 ,  H04L27/0014 ,  H04L27/2675 ,  H04L2027/003 ,  H04L2027/0046 ,  H04L2027/0067 ,  H04L2027/0087

Abstract: In a frequency offset estimating device of a subscriber station of a communication system in which a plurality of sectors are allocated to a cell, the frequency offset estimating device extracts a preamble sequence from a downlink frame signal. The frequency offset estimating device estimates a phase offset of a sector to which the subscriber station belongs among the sectors by using the preamble sequence, and calculates the autocorrelation value for the respective signals of the preamble sequence. The frequency offset estimating device compensates the autocorrelation value by using the phase offset, and estimates a frequency offset from the sum of the phase offset compensated autocorrelation values.

Abstract translation: 在将多个扇区分配给小区的通信系统的用户台的频率偏移估计装置中，频率偏移估计装置从下行链路帧信号中提取前置码序列。 频率偏移估计装置通过使用前置码序列来估计用户站所属的扇区的相位偏移，并且计算前导序列的各个信号的自相关值。 频率偏移估计装置通过使用相位偏移来补偿自相关值，并且从相位偏移补偿自相关值的和估计频率偏移。

公开(公告)号：US20070135052A1

公开(公告)日：2007-06-14

申请号：US11636812

申请日：2006-12-11

Applicant: Hyeong-Sook Park ,  Kyung-Yeol Sohn ,  Dae-Ho Kim ,  Jun-Woo Kim ,  Youn-Ok Park

Inventor： Hyeong-Sook Park ,  Kyung-Yeol Sohn ,  Dae-Ho Kim ,  Jun-Woo Kim ,  Youn-Ok Park

IPC: H04B1/00

CPC classification number: H04B7/0617 ,  H04L5/023 ,  H04L27/2608 ,  Y02D70/142 ,  Y02D70/444

Abstract: A downlink beamforming apparatus and a transmission apparatus including the same includes a subcarrier based user identifier for dividing subcarriers according to users, a beamforming weight buffer for storing first beamforming weights for the subcarriers by each of transmitting antennas, an interpolator for outputting second beamforming weights for each transmitting antenna by interpolating the first beamforming weights, and a signal reproducer for reproducing the signal for each transmitting antenna. Subcarriers are allocated to the signal by each user; and a complex multiplier multiplies the signal for each transmitting antenna by the second beamforming weights.

Abstract translation: 下行链路波束成形装置及其发送装置包括：用于根据用户分割子载波的基于子载波的用户标识符;波束形成权重缓冲器，用于存储每个发送天线的子载波的第一波束形成权重;内插器，用于输出第二波束形成权重 通过内插第一波束形成权重的每个发射天线，以及用于再现每个发射天线的信号的信号再现器。 子载波由每个用户分配给信号; 并且复数乘法器将每个发射天线的信号乘以第二波束形成权重。

公开(公告)号：US20070133728A1

公开(公告)日：2007-06-14

申请号：US11636797

申请日：2006-12-11

Applicant: Seung-Jae Bahng ,  Youn-Ok Park ,  Chang-Wahn Yu ,  Eon-Young Hong

Inventor： Seung-Jae Bahng ,  Youn-Ok Park ,  Chang-Wahn Yu ,  Eon-Young Hong

IPC: H04L25/38

CPC classification number: H04L27/2656 ,  H04L27/2676

Abstract: Disclosed is an apparatus for acquiring initial frame timing in a communication system having a normalizer that calculates a normalized window power from powers of samples of received signal during a monitoring period, a cross power calculator that calculates a window cross power from cross powers of the samples during the monitoring period, and each cross power corresponds to multiplication of two of the samples, a divider that divides the window cross power by the normalized window power and outputs a metric for a sample corresponding to the monitoring period, and a peak-value detector that searches a sample having the maximum value among metrics for the samples of the received signals during a predetermined period, and the metrics are calculated by shifting the monitoring period, with a sample next to the sample searched by the peak-value detector being determined as a starting point of a frame.

Abstract translation: 公开了一种用于在具有归一化器的通信系统中获取初始帧定时的装置，该归一化器根据监视期间的接收信号的采样功率计算归一化窗功率;交叉功率计算器，其从样本的交叉功率计算窗口交叉功率 在监视期间，并且每个交叉功率对应于两个样本的乘法，分频器将窗口交叉功率除以归一化窗功率，并输出对应于监视周期的样本的度量，以及峰值检测器 在预定时间段内搜索具有接收信号样本的度量中的最大值的样本，并且通过将监测周期移位，通过峰值检测器搜索的样本旁边的样本被确定为 一个框架的起点。

公开(公告)号：US20070089043A1

公开(公告)日：2007-04-19

申请号：US11529412

申请日：2006-09-28

Applicant: Su-Chang Chae ,  Youn-ok Park

Inventor： Su-Chang Chae ,  Youn-ok Park

IPC: H03M13/03

CPC classification number: H03M13/41

Abstract: The present invention relates to a Viterbi decoder and a Viterbi decoding method in a register exchange method. The Viterbi decoder receives an encoded bit sequence of a convolutional encoding method from a channel, generates an expanded encoded bit sequence by cyclically adding a part of the encoded bit sequence or the entire encoded bit sequence to the encoded bit sequence more than one time, performs a Viterbi decoding operation in a register exchange method, and generates decoded data. In addition, the Viterbi decoder selects an end bit sequence corresponding to the number of the unit of encoded bits among the decoded data, rearranges an order of the end bit sequence, and generates final decoded data.

Abstract translation: 维特比解码器和维特比译码方法技术领域本发明涉及维特比译码器和维特比译码方法。 维特比解码器从信道接收卷积编码方法的编码比特序列，通过将编码的比特序列的一部分或整个编码的比特序列循环地添加到编码比特序列多于一次来生成扩展编码比特序列，执行 在寄存器交换方法中进行维特比解码操作，并生成解码数据。 此外，维特比解码器选择与解码数据中的编码比特数单位对应的结束比特序列，重新排列结束比特序列的顺序，并生成最终解码数据。

公开(公告)号：US07184409B2

公开(公告)日：2007-02-27

申请号：US10133418

申请日：2002-04-29

Applicant: Yong-Su Lee ,  Youn-Ok Park ,  Seung-Chan Bang ,  Eui-Hoon Jeong ,  Ik-Soo Jin

Inventor： Yong-Su Lee ,  Youn-Ok Park ,  Seung-Chan Bang ,  Eui-Hoon Jeong ,  Ik-Soo Jin

IPC: H04B7/216

CPC classification number: H04L1/0059 ,  H04L1/0046 ,  H04L1/0054 ,  H04L1/0061

Abstract: A blind rate detection method in an asynchronous mobile communication system comprises: restoring data when a path selection (PS) value at a last bit's possible position satisfies a PS condition; determining whether a SER satisfies a SER condition when no error occurs in a CRC; determining whether to update a minimum value of PS values when the SER satisfies the SER condition; setting a PS value of the last bit's possible position as the minimum value of the PS values and the last bit's possible position as a last detection position when updating the minimum value; and repeating the above steps until the last bit's possible position reaches a maximum value, and outputting the last detection position when the last bit's possible position becomes the maximum value.

Abstract translation: 异步移动通信系统中的盲率检测方法包括：当最终位的可能位置的路径选择（PS）值满足PS条件时，恢复数据; 当CRC中没有发生错误时，确定SER是否满足SER条件; 当SER满足SER条件时，确定是否更新PS值的最小值; 将最后一位的可能位置的PS值设置为PS值的最小值，并将最后一位的可能位置设置为更新最小值时的最后一个检测位置; 并重复上述步骤，直到最后一位的可能位置达到最大值，并且当最后一位的可能位置变为最大值时输出最后一个检测位置。