公开(公告)号：US07477190B2

公开(公告)日：2009-01-13

申请号：US11607270

申请日：2006-12-01

申请人： Young-Jo Bang ,  Young Ho Yun ,  Chang-Wahn Yu ,  Hyung Rae Park ,  Youn-Ok Park

发明人： Young-Jo Bang ,  Young Ho Yun ,  Chang-Wahn Yu ,  Hyung Rae Park ,  Youn-Ok Park

IPC分类号： H01Q3/00 ,  G01S7/36 ,  H04J1/00

CPC分类号： H04B7/086 ,  G01S3/74

摘要： A beamforming device includes a Direction Of Arrival (DOA) estimation unit for estimating DOAs of the received signals based on a data subcarrier matrix; a pre-spatial filtering unit for using the estimated DOA, performing a filtering operation for the data subcarrier matrix, and generating filtering matrixes; a signal identification unit for using a data sequence, identifying original and interference signals, and generating the DOAs of the original and interference signals; a spatial filtering unit for generating an interference-plus-noise covariance matrix by using the DOA of the interference signal, eliminating the interference signal by using the covariance matrix and the DOA of the original signal, and forming final beams for the original signal; and a channel estimating and signal combining unit for performing a maximal ratio combining operation so that the final beams are combined as one combined final beam.

摘要翻译： 波束形成装置包括：基于数据子载波矩阵估计接收信号的DOA的到达方向估计单元; 用于使用所估计的DOA的预空间滤波单元，对所述数据子载波矩阵执行滤波操作，以及生成滤波矩阵; 信号识别单元，用于使用数据序列，识别原始和干扰信号，以及生成原始和干扰信号的DOA; 空间滤波单元，用于通过使用干扰信号的DOA产生干扰加噪声协方差矩阵，通过使用原始信号的协方差矩阵和DOA消除干扰信号，并且为原始信号形成最终的波束; 以及信道估计和信号组合单元，用于执行最大比组合操作，使得最终光束被组合为一个组合的最终光束。

公开(公告)号：US20080205532A1

公开(公告)日：2008-08-28

申请号：US11722028

申请日：2005-05-11

申请人： Hyeong-Sook Park ,  Youn-Ok Park

发明人： Hyeong-Sook Park ,  Youn-Ok Park

IPC分类号： H04L27/28

CPC分类号： H04L27/2608

摘要： The present invention relates to a method for allocating subcarriers in an orthogonal frequency division multiplex (OFDM) system, and a transmitter thereof. In the OFDM system according to an exemplary embodiment of the present invention, the subcarrier allocation is performed in the buffer (10) before a modulation mapping operation is performed according to a modulation method such that the delay may not be generated in the subchannel formed on the symbol axis. The delay corresponding to the symbols is prevented without using any additional hardware for eliminating the delay generated when the subcarriers are allocated to the subchannel formed on the symbol axis.

摘要翻译： 本发明涉及一种用于在正交频分复用（OFDM）系统中分配子载波的方法及其发射机。 在根据本发明的示例性实施例的OFDM系统中，在根据调制方法执行调制映射操作之前，在缓冲器（10）中执行子载波分配，使得可以在形成的子信道中不产生延迟 符号轴。 防止对应于符号的延迟，而不使用任何额外的硬件来消除当子载波被分配到在符号轴上形成的子信道时产生的延迟。

公开(公告)号：US20080141098A1

公开(公告)日：2008-06-12

申请号：US11722214

申请日：2005-03-25

申请人： Su-Chang Chae ,  Youn-Ok Park

发明人： Su-Chang Chae ,  Youn-Ok Park

IPC分类号： H03M13/11 ,  G06F11/10

CPC分类号： H03M13/116 ,  H03M13/1177

摘要： The present invention provides an LDPC encoder, a channel encoder of a portable internet system including the LDPC encoder, and an encoding method thereof. The LDPC encoder according to the present invention generates a Costas array, shifts it, generates an analogous circulation parity check matrix having a repeated pattern from the shifted Costas array, and performs encoding by using the parity check matrix. With this LDPC encoder, complexity of encoding system may be reduced.

摘要翻译： 本发明提供一种LDPC编码器，包括LDPC编码器的便携式互联网系统的信道编码器及其编码方法。 根据本发明的LDPC编码器生成Costas阵列，将其移位，从移位的Costas阵列生成具有重复模式的类似循环奇偶校验矩阵，并通过使用奇偶校验矩阵进行编码。 利用该LDPC编码器，可以减少编码系统的复杂性。

公开(公告)号：US20080137781A1

公开(公告)日：2008-06-12

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 ,  Il Min Kim

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

IPC分类号： H04L27/06

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。

公开(公告)号：US07372893B2

公开(公告)日：2008-05-13

申请号：US10691084

申请日：2003-10-21

申请人： Youn-Ok Park ,  Young-Hoon Kim

发明人： Youn-Ok Park ,  Young-Hoon Kim

IPC分类号： H04B1/00

CPC分类号： H04L5/023 ,  H04L27/2647

摘要： Disclosed is a device and method for compensating for phase distortions in a base station of an OFDMA-based cellular system. The method comprises receiving OFDM symbols from a plurality of mobile stations, canceling a symbol guard interval using a reference timing signal, and performing an FFT (fast Fourier transform) process on the OFDM symbols; dividing the OFDM symbols that have undergone FFT processing into subchannel groups of the mobile stations; restoring phases of the OFDM symbols divided into subchannel groups; and performing channel estimation and equalization on the restored OFDM symbols for each mobile station to thereby perform a demodulation process.

摘要翻译： 公开了用于补偿基于OFDMA的蜂窝系统的基站中的相位失真的装置和方法。 该方法包括从多个移动站接收OFDM符号，使用参考定时信号消除符号保护间隔，并对OFDM符号执行FFT（快速傅里叶变换）处理; 将经过FFT处理的OFDM符号划分成移动站的子信道组; 恢复分成子信道组的OFDM符号的相位; 并且对每个移动台对恢复的OFDM符号执行信道估计和均衡，从而执行解调处理。

公开(公告)号：US20070286088A1

公开(公告)日：2007-12-13

申请号：US11667641

申请日：2005-10-26

申请人： Kyung-Yeol Sohn ,  Youn-Ok Park

发明人： Kyung-Yeol Sohn ,  Youn-Ok Park

IPC分类号： H04L12/26 ,  H04L12/46

CPC分类号： H04L1/0041 ,  H04L1/0061 ,  H04L69/32

摘要： An inspection device of a physical layer module connected between a terminal transmitting an Internet Protocol (IP)-packet and a physical layer module, the inspection device including an interface transmitting/receiving the IP-packet; a destination MAC address analyzing unit analyzing a destination MAC address to which the IP-packet transmitted from the interface is to be transmitted; a physical layer-packet/physical layer-frame generator converting the IP-packet and generating a physical layer-frame with a control header and an error-detecting code attached; a physical layer-frame transceiving unit transmitting/receiving a physical layer-frame to/from the physical layer module; and an IP-packet generator receiving a physical layer-frame with a control header and an error-detecting code attached from the physical layer module, determining the physical layer module based on the control header and the error-detecting code, converting the physical layer-frame into an IP-packet, and transmitting the IP-packet to the interface.

摘要翻译： 连接在发送因特网协议（IP）包的终端和物理层模块的终端之间的物理层模块的检查装置，所述检查装置包括发送/接收所述IP包的接口; 目的地MAC地址分析单元，对从所述接口发送的所述IP包的所述目的地MAC地址进行分析; 物理层分组/物理层帧生成器转换IP分组并且生成具有附加的控制报头和检错码的物理层帧; 物理层帧收发单元向物理层模块发送/接收物理层帧; 以及从物理层模块接收具有控制头和物理层的物理层帧的IP包发生器，基于控制头和检错码确定物理层模块，转换物理层 帧转换成IP包，并将IP包发送到接口。

公开(公告)号：US20070155352A1

公开(公告)日：2007-07-05

申请号：US11635715

申请日：2006-12-07

申请人： Young-Ha Lee ,  Youn-Ok Park

发明人： Young-Ha Lee ,  Youn-Ok Park

IPC分类号： H04B7/08 ,  H04B1/06 ,  H04B7/00

CPC分类号： H04B7/0845

摘要： A receiving method and apparatus of an orthogonal frequency division multiplexing access system having multiple antennas that is capable of improving system design and realization of integration degree by reducing complexity of fast Fourier transform (FFT) and noncoherent combination is provided. The receiving apparatus of a communication system having multiple antennas includes a parallel/series converter for converting data received according to each receiving path from parallel to series data; a fast Fourier transform (FFT) unit for fast Fourier transforming the data converted from parallel to series data; a series/parallel converter for converting the fast Fourier transformed series data from series to parallel data; a series noncoherent combiner for noncoherently combining the fast Fourier transformed series data and outputting the noncoherent combined data; a channel estimator/compensator for channel-estimating/compensating the data converted to parallel according to respective receiving paths; and a coherent combiner for coherently combining the channel-estimated/compensated data and for outputting the coherent combined data.

摘要翻译： 提供了具有多个天线的正交频分复用接入系统的接收方法和装置，其能够通过降低快速傅里叶变换（FFT）和非相干组合的复杂度来改善系统设计和集成度的实现。 具有多个天线的通信系统的接收装置包括并行/串联转换器，用于将根据每个接收路径接收的数据从并行转换为串行数据; 快速傅立叶变换（FFT）单元，用于将从并行转换的数据快速傅里叶变换成串行数据; 用于将快速傅里叶变换的串行数据从串行数据转换为并行数据的串/并行转换器; 一种用于非相干组合快速傅立叶变换序列数据并输出非相干组合数据的串联非相干组合器; 信道估计/补偿器，用于根据各个接收路径对被转换为并行的数据进行信道估计/补偿; 以及用于相干组合信道估计/补偿数据并输出相干组合数据的相干组合器。

公开(公告)号：US20070133460A1

公开(公告)日：2007-06-14

申请号：US11636814

申请日：2006-12-11

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

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

IPC分类号： H04Q7/00 ,  H04L12/28

CPC分类号： H04B17/318

摘要： Disclosed herein is a base station that extracts a ranging channel signal from a received signal partially correlates each of a plurality of ranging channel signals and each of ranging codes according to ranging modes, and selects a ranging channel signal greater than a first threshold value, the plurality of ranging channel signals being signals according to plurality of time delays of a ranging channel signal. In addition, the base station correlates each of the selected ranging channel signal and each of corresponding ranging code, selects a ranging channel signal having the maximum correlation value, and estimates receiving power by using a time delay corresponding to the selected ranging channel signal.

摘要翻译： 本文公开了一种从接收信号中提取测距信道信号的基站，根据测距模式对多个测距信道信号和测距码中的每一个进行部分相关，并选择大于第一阈值的测距信道信号， 多个测距信道信号是根据测距信道信号的多个时间延迟的信号。 此外，基站将所选择的测距信道信号和每个对应的测距码相关，选择具有最大相关值的测距信道信号，并且通过使用与所选择的测距信道信号相对应的时间延迟来估计接收功率。

公开(公告)号：US07178085B2

公开(公告)日：2007-02-13

申请号：US10535925

申请日：2003-11-21

申请人： Su-Chang Chae ,  Yong-Su Lee ,  Jung-Pil Choi ,  Youn-Ok Park

发明人： Su-Chang Chae ,  Yong-Su Lee ,  Jung-Pil Choi ,  Youn-Ok Park

IPC分类号： H03M13/00

CPC分类号： H03M13/1177 ,  H03M13/116 ,  H03M13/1182

摘要： An encoder using LDPC (low density parity check) codes, and an encoding method. The encoder comprises a parity check matrix generator for generating a parity check matrix H; and a codeword generator for processing the parity check matrix H to generate a codeword, and the codeword generator comprises: an AB analyzer for analyzing the parity check matrix H into matrixes A and B; a pivoting unit for pivoting the parity check matrix H; a bit-reversing unit for bit-reversing the pivoted matrix; an LU analyzer for analyzing the matrix A into matrixes L and U; and a codeword generator unit for performing a logical operation on the matrixes A, B, L and U. A bit-reversing method is used to effectively generate a parity check matrix having a high girth by using a regular encoder.

摘要翻译： 使用LDPC（低密度奇偶校验）码的编码器，以及编码方法。 编码器包括用于产生奇偶校验矩阵H的奇偶校验矩阵发生器; 以及用于处理奇偶校验矩阵H以生成码字的码字生成器，并且码字生成器包括：用于将奇偶校验矩阵H分析为矩阵A和B的AB分析器; 用于枢转奇偶校验矩阵H的枢转单元; 用于对所述枢转矩阵进行位反转的位反转单元; 用于将矩阵A分解为矩阵L和U的LU分析器; 以及用于对矩阵A，B，L和U执行逻辑运算的码字发生器单元。使用位反转方法通过使用常规编码器来有效地生成具有高周长的奇偶校验矩阵。

公开(公告)号：US08406320B2

公开(公告)日：2013-03-26

申请号：US11721156

申请日：2005-10-26

申请人： Hyeong-Sook Park ,  Youn-Ok Park

发明人： Hyeong-Sook Park ,  Youn-Ok Park

IPC分类号： H04L27/28

CPC分类号： H04L27/2624

摘要： The present invention relates to a digital clipping method for reducing a high peak-to-average power ratio (PAPR) of a transmission signal in a transmitter of an orthogonal frequency division multiplexing access (OFDMA) system. In the method, a) the transmission signal to be digitally clipped is divided into real and imaginary parts, b) magnitudes of the real and imaginary part signals are divided into a plurality clipping levels, and c) the transmission signal is respectively clipped by comparing the real and imaginary part signals with the plurality of clipping levels while allowing phase errors. In c), a plurality of comparators is used to respectively compare the real and imaginary parts of the complex number transmission signal with the plurality of clipping levels.

摘要翻译： 本发明涉及一种用于降低正交频分多路复用接入（OFDMA）系统的发射机中的发送信号的高峰值与平均功率比（PAPR）的数字削波方法。 在该方法中，a）要被数字剪切的传输信号被划分成实部和虚部，b）实部和虚部信号的大小被分成多个削波电平，c）通过比较来分别传输发送信号 具有多个限幅电平的实部和虚部信号同时允许相位误差。 在c）中，使用多个比较器来分别比​​较复数传输信号的实部和虚部与多个限幅电平。