公开(公告)号：US20060053359A1

公开(公告)日：2006-03-09

申请号：US10535925

申请日：2003-11-21

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

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

IPC: H03M13/00 ,  H04L27/36

CPC classification number: H03M13/1177 ,  H03M13/116 ,  H03M13/1182

Abstract: 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.

Abstract translation: 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：US20050141474A1

公开(公告)日：2005-06-30

申请号：US10971787

申请日：2004-10-21

Applicant: Young-Ha Lee ,  Jun-Woo Kim ,  Youn-Ok Park ,  Seung-Ku Hwang

Inventor： Young-Ha Lee ,  Jun-Woo Kim ,  Youn-Ok Park ,  Seung-Ku Hwang

IPC: H04J11/00 ,  H04J3/06 ,  H04L5/02 ,  H04L27/26

CPC classification number: H04J3/0682 ,  H04L5/023 ,  H04L27/2655

Abstract: Disclosed is a ranging system and method in an OFDMA system. The ranging system includes complex exponential twiddle storage units for respectively storing complex exponential twiddle factors corresponding to a timing error, complex multipliers for respectively complex-multiplying the complex exponential twiddle factors by received uplink ranging data, code correlators for respectively correlating the outputs of the complex multipliers and ranging codes, and threshold comparators for respectively comparing the outputs of the code correlators with a threshold.

Abstract translation: 公开了OFDMA系统中的测距系统和方法。 测距系统包括用于分别存储对应于定时误差的复指数旋转因子的复指数旋转存储单元，用于分别复数乘以接收的上行测距数据的复指数旋转因子的复乘数，用于分别将复数的输出相关联的码相关器 乘法器和测距码，以及用于分别比较码相关器的输出与阈值的阈值比较器。

公开(公告)号：US20050135230A1

公开(公告)日：2005-06-23

申请号：US10923136

申请日：2004-08-19

Applicant: Chang-Wahn Yu ,  Kyung-Yeol Sohn ,  Youn-Ok Park ,  Seung-Ku Hwang

Inventor： Chang-Wahn Yu ,  Kyung-Yeol Sohn ,  Youn-Ok Park ,  Seung-Ku Hwang

IPC: H04J11/00 ,  H04L5/02

CPC classification number: H04L5/023

Abstract: Disclosed is an apparatus and method for processing a ranging channel in an OFDMA system. The apparatus converts received ranging complex signals to polar coordinate signals having a signal magnitude and a phase, and the received converted signals are each represented by a signal magnitude component and a phase component. A predetermined phase component of a signal according to a phase rotation is used to estimate a time delay by an addition operation of the phase of the received signal and the phase according to the phase rotation. Accordingly, the time delay and the power of each reverse link user of the OFDMA mobile communication system can be calculated by arithmetic operations of addition components instead of multiplication components, resulting in the reduction of complexity.

Abstract translation: 公开了一种在OFDMA系统中处理测距信道的装置和方法。 该装置将接收到的测距复合信号转换为具有信号幅度和相位的极坐标信号，并且接收的转换信号各自由信号幅度分量和相位分量表示。 根据相位旋转的信号的预定相位分量用于通过根据相位旋转的接收信号的相位和相位的相加运算来估计时间延迟。 因此，可以通过加法分量的算术运算而不是乘法分量来计算OFDMA移动通信系统的每个反向链路用户的时延和功率，从而降低复杂度。

公开(公告)号：US08654882B2

公开(公告)日：2014-02-18

申请号：US13453464

申请日：2012-04-23

Applicant: Hoon Lee ,  Young Jo Bang ,  Seungjae Bang ,  Jung Pil Choi ,  Youn Ok Park ,  Jae Kwon Kim ,  Nulibyul Kim

Inventor： Hoon Lee ,  Young Jo Bang ,  Seungjae Bang ,  Jung Pil Choi ,  Youn Ok Park ,  Jae Kwon Kim ,  Nulibyul Kim

IPC: H04B7/02 ,  H04L1/02 ,  H04L27/06

CPC classification number: H04L25/03318 ,  H04B7/0854 ,  H04L25/03286 ,  H04L25/03292 ,  H04L25/03891 ,  H04L25/067

Abstract: A receiver in a multiple-input multiple-output (MIMO) system is provided. The receiver includes a channel estimator estimating a channel based on a receiving signal, a minimum mean square error (MMSE) based reciprocal log likelihood ratio (R-LLR) calculator connected with the channel estimator and calculating an R-LLR based on the receiving signal and the estimated channel, and a channel decoder connected with the MMSE based R-LLR calculator and decoding the channel and the receiving signal based on the calculated R-LLR, wherein the R-LLR is calculated based on the reciprocity.

Abstract translation: 提供了一种多输入多输出（MIMO）系统中的接收机。 接收机包括基于接收信号估计信道的信道估计器，与信道估计器连接的基于最小均方误差（MMSE）的倒数似然比（R-LLR）计算器，并基于接收信号计算R-LLR 和估计信道，以及与基于MMSE的R-LLR计算器连接的信道解码器，并且基于所计算的R-LLR对信道和接收信号进行解码，其中基于互易性来计算R-LLR。

公开(公告)号：US08600420B2

公开(公告)日：2013-12-03

申请号：US12094763

申请日：2006-12-08

Applicant: Young-Ha Lee ,  Chang-Wahn Yu ,  Youn-Ok Park

Inventor： Young-Ha Lee ,  Chang-Wahn Yu ,  Youn-Ok Park

IPC: H04B15/00 ,  H04W72/00 ,  H04W74/00 ,  H04W4/00 ,  H04J3/06

CPC classification number: H04L27/2655 ,  H04L27/2646

Abstract: When a base station of a time division duplex based mobile communication system receives an initial ranging request signal from a subscriber station, the base station generates initial ranging information including delay time information to the subscriber station, and receives uplink data delayed and transmitted using a delay time from the subscriber station. Also, when the subscriber station transmits an initial ranging request signal to the base station and receives initial ranging information including delay time information from the base station, the subscriber station establishes a transmission parameter value by using the transmission parameter value included in the initial ranging information and transmits uplink data by using the established delay time.

Abstract translation: 当基于时分双工的移动通信系统的基站从用户站接收到初始测距请求信号时，基站向用户站生成包括延迟时间信息的初始测距信息，并且接收延迟并使用延迟发送的上行链路数据 来自用户站的时间。 此外，当用户台向基站发送初始测距请求信号并从基站接收包括延迟时间信息的初始测距信息时，用户台通过使用包含在初始测距信息中的传输参数值来建立传输参数值 并通过使用建立的延迟时间来发送上行链路数据。

公开(公告)号：US20130004185A1

公开(公告)日：2013-01-03

申请号：US13536949

申请日：2012-06-28

Applicant: Young Jo BANG ,  Youn Ok Park

Inventor： Young Jo BANG ,  Youn Ok Park

IPC: H04B10/00 ,  H04B7/14

CPC classification number: H04B10/278 ,  H04B10/29 ,  H04B10/548

Abstract: An optical repeater in a mobile communication system includes a main hub unit (MHU) and a plurality of repeaters connected to a plurality of access points of the MHU, respectively. Each of the repeaters receives subcarrier information and a signal transmitted from a base station, as optical signals, through the MHU or a different repeater connected thereto, processes only a signal corresponding to a subcarrier allocated to a terminal which has accessed according to the subcarrier information, and transmits the processed signal to the terminal which has accessed. Also, each of the repeaters maps a signal of the terminal which has accessed to a subcarrier allocated to the terminal which has accessed, and transmits the same to the MHU or a different repeater connected thereto.

Abstract translation: 移动通信系统中的光中继器分别包括连接到MHU的多个接入点的主集线器单元（MHU）和多个中继器。 每个中继器接收子载波信息，并且从基站发送的信号作为光信号通过MHU或与其连接的不同的中继器，仅处理对应于分配给根据子载波信息访问的终端的子载波的信号 ，并将处理后的信号发送到已访问的终端。 此外，每个中继器将已经访问的终端的信号映射到分配给已经访问的终端的子载波，并将其发送到与其连接的MHU或不同的中继器。

公开(公告)号：US20120275355A1

公开(公告)日：2012-11-01

申请号：US13458948

申请日：2012-04-27

Applicant: Jisoo PARK ,  Sook Jin Lee ,  Youn Ok Park ,  Dong Seung Kwon

Inventor： Jisoo PARK ,  Sook Jin Lee ,  Youn Ok Park ,  Dong Seung Kwon

IPC: H04W72/04 ,  H04J1/00

CPC classification number: H04W72/042 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/1812 ,  H04L1/1867 ,  H04L1/1893 ,  H04L5/14 ,  H04W72/0446

Abstract: A method of allocating a resource by a base station is provided. The base station allocates a plurality of radio resources for transmitting a plurality of data bursts to a plurality of subframes in one frame, respectively, and generates a resource allocation information signal including allocation information on the plurality of radio resources. The base station transmits the resource allocation information signal to a mobile station through one subframe.

Abstract translation: 提供了一种由基站分配资源的方法。 基站分配多个无线电资源，用于将多个数据突发发送到一个帧中的多个子帧，并且生成包括关于多个无线电资源的分配信息的资源分配信息信号。 基站通过一个子帧向移动台发送资源分配信息信号。

公开(公告)号：US20120269251A1

公开(公告)日：2012-10-25

申请号：US13453450

申请日：2012-04-23

Applicant: Hyeong Sook PARK ,  Jun Woo KIM ,  Youn Ok PARK

Inventor： Hyeong Sook PARK ,  Jun Woo KIM ,  Youn Ok PARK

IPC: H04B17/00 ,  H04W24/00

CPC classification number: H04B17/336 ,  H04B17/318 ,  H04B17/345

Abstract: There is provided a method and apparatus for estimating a signal to noise ratio (SNR) in a wireless communication system. The apparatus selects a preamble signal for each of a plurality of sectors from a reception signal experienced by fast Fourier transform (FFT), outputs a correlation signal by performing a correlation between the preamble signal for each sector and a preamble reference signal, estimates power of the reception signal and noise power for each sector based on the correlation signal, selects a minimum value from among the noise powers for the sectors, outputs a net power for each sector by subtracting the minimum value from the power of the reception signal for each sector, and calculates the SNR by dividing the net power for each sector by the minimum value.

Abstract translation: 提供了一种用于估计无线通信系统中的信噪比（SNR）的方法和装置。 该装置从快速傅里叶变换（FFT）所经历的接收信号中选择多个扇区中的每一个的前同步信号，通过执行每个扇区的前导码信号与前导码参考信号之间的相关来输出相关信号， 基于相关信号对每个扇区的接收信号和噪声功率，从扇区的噪声功率中选择最小值，通过从每个扇区的接收信号的功率中减去最小值来输出每个扇区的净功率 ，并且通过将每个扇区的净功率除以最小值来计算SNR。

公开(公告)号：US08275053B2

公开(公告)日：2012-09-25

申请号：US11931188

申请日：2007-10-31

Applicant: Young-Jo Bang ,  Kyung-Yeol Sohn ,  Youn-Ok Park

Inventor： Young-Jo Bang ,  Kyung-Yeol Sohn ,  Youn-Ok Park

IPC: H04L27/28

CPC classification number: H04L25/0236 ,  H04L5/0007 ,  H04L5/0048 ,  H04L25/0222 ,  H04L27/261

Abstract: The present invention relates to an apparatus and method of estimating a channel based on a channel delay spread in a mobile communication system. Pilot subcarriers are inserted between data subcarriers at predetermined intervals to estimate a channel at locations of the pilot subcarriers. An approximate channel delay spread value is estimated by using an autocorrelation value of a pilot signal. Then, a channel for data subcarriers between the pilot subcarriers is estimated by using a Wiener finite impulse response (FIR) filter that has a separate coefficient according to the estimated delay spread value. Accordingly, by changing the Wiener FIR filter coefficient according to the delay spread value of the channel, it is possible to estimate the channel so as to be adaptive for a change of the channel over time. Since the filter coefficients, which are calculated in advance, are used, it is possible to reduce the amount of calculation required when calculating the filter coefficients. As a result, an apparatus for estimating a channel can be easily achieved.

Abstract translation: 本发明涉及一种基于移动通信系统中的信道延迟扩展来估计信道的装置和方法。 导频子载波以预定间隔插入数据子载波之间，以估计导频子载波位置处的信道。 通过使用导频信号的自相关值来估计近似信道延迟扩展值。 然后，通过使用根据估计的延迟扩展值具有单独系数的维纳有限脉冲响应（FIR）滤波器来估计导频子载波之间的数据子载波的信道。 因此，通过根据信道的延迟扩展值改变维纳FIR滤波器系数，可以估计信道，以适应随时间变化的信道。 由于使用预先计算的滤波器系数，因此可以减少计算滤波器系数时所需的计算量。 结果，可以容易地实现用于估计通道的装置。

公开(公告)号：US08184606B2

公开(公告)日：2012-05-22

申请号：US12094897

申请日：2006-12-08

Applicant: Young-Jo Bang ,  Youn-Ok Park ,  Yong-Su Lee

Inventor： Young-Jo Bang ,  Youn-Ok Park ,  Yong-Su Lee

IPC: H04H20/67

CPC classification number: H04W24/00 ,  H04B17/12 ,  H04W24/08 ,  H04W88/08

Abstract: In a signal monitoring apparatus of a base station of a communication system having multiple antennas, a transmitting/receiving unit transmits a plurality of transmit signals by using the multiple antennas or processes a plurality of receive signals received through the multiple antennas. A radio frequency calibration unit calibrates the transmit signals transmitted through the multiple antennas, and processes at least one target transmit signal among the plurality of transmit signals so as to monitor the at least one target transmit signal. A signal monitoring unit receives at least one first signal or at least one second signal, and transmits the at least one first signal or the at least one second signal to user equipment. The at least one first signal is a signal processed from at least one target receive signal among the plurality of receive signals, and the at least one second signal is a signal processed from the at least one target transmit signal by controlling the radio frequency calibration unit.

Abstract translation: 在具有多个天线的通信系统的基站的信号监视装置中，发送/接收单元通过使用多个天线发送多个发送信号，或处理通过多个天线接收的多个接收信号。 射频校准单元校准通过多个天线发射的发射信号，并处理多个发射信号中的至少一个目标发射信号，以便监测至少一个目标发射信号。 信号监测单元接收至少一个第一信号或至少一个第二信号，并将所述至少一个第一信号或至少一个第二信号发送给用户设备。 所述至少一个第一信号是从所述多个接收信号中的至少一个目标接收信号处理的信号，并且所述至少一个第二信号是通过控制所述射频校准单元从所述至少一个目标发射信号处理的信号 。