公开(公告)号：US07546509B2

公开(公告)日：2009-06-09

申请号：US10547236

申请日：2003-12-30

申请人： Soo Young Kim ,  Deock-Gil Oh ,  Jae-Moung Kim

发明人： Soo Young Kim ,  Deock-Gil Oh ,  Jae-Moung Kim

IPC分类号： H03M13/00

CPC分类号： H03M13/2963 ,  H03M13/033 ,  H03M13/152 ,  H03M13/29 ,  H03M13/2909 ,  H03M13/2918 ,  H03M13/47 ,  H03M13/635 ,  H03M13/6368 ,  H03M13/6381 ,  H04L1/0009 ,  H04L1/0057 ,  H04L1/0069 ,  H04L1/1819

摘要： The rate compatible code is formed by forming an m dimensional product code by using a systematic block code in a predetermined number of axes: The m dimensional product code is divided into an information block and 2m−1 parity blocks. Indices are allocated to the divided blocks of the information block and 2m−1 parity blocks. Combinations of the information block and corresponding parity blocks adjacent to the information block are obtained. A first weighting factor w1 for the combinations is estimated and saved. Another parity block adjacent to the saved combination is found and a new combination is formed. The first weighting factor w1 for the new combination is estimated. If there are combinations having the same first weighting factor w1, a second weighting factor w2 for the combinations is estimated and the combinations having a smaller value of w2 are neglected. Rate compatible having the combinations are formed.

摘要翻译： 速率兼容代码通过使用预定数量的轴中的系统块代码形成m维乘积代码形成：m维乘积代码被划分为信息块和2m-1个奇偶校验块。 指数被分配给信息块的分割块和2m-1个奇偶校验块。 获得与信息块相邻的信息块和对应的奇偶校验块的组合。 估计并保存组合的第一加权系数w1。 找到与保存的组合相邻的另一个奇偶校验块，并形成新的组合。 估计新组合的第一加权因子w1。 如果存在具有相同第一加权因子w1的组合，则估计用于组合的第二加权因子w2，并且忽略具有较小值w2的组合。 具有组合的速率兼容。

公开(公告)号：US20050140438A1

公开(公告)日：2005-06-30

申请号：US10856240

申请日：2004-05-27

申请人： Ming-Lu Jin ,  Soo-Young Kim ,  Seong-Pal Lee ,  Do-Seob Ahn ,  Deock-Gil Oh ,  Jae-Moung Kim

发明人： Ming-Lu Jin ,  Soo-Young Kim ,  Seong-Pal Lee ,  Do-Seob Ahn ,  Deock-Gil Oh ,  Jae-Moung Kim

IPC分类号： H03F1/26 ,  H03F1/32

CPC分类号： H03F1/3241

摘要： A fast LUT predistortion apparatus and method for compensating nonlinear distortion of the high power amplifier HPA is disclosed. The apparatus includes a predistortion unit for predistorting an input complex digital signal based on a look up table LUT implementation and outputting a predistorted complex signal; and a power amplifier for amplifying the predistorted signal and outputting an amplified complex signal.

摘要翻译： 公开了用于补偿高功率放大器HPA的非线性失真的快速LUT预失真装置和方法。 该装置包括：预失真单元，用于基于查找表LUT实现预失真输入复数数字信号并输出​​预失真的复信号; 以及用于放大预失真信号并输出​​放大的复合信号的功率放大器。

公开(公告)号：US07170343B2

公开(公告)日：2007-01-30

申请号：US10856240

申请日：2004-05-27

申请人： Ming-Lu Jin ,  Soo-Young Kim ,  Seong-Pal Lee ,  Do-Seob Ahn ,  Deock-Gil Oh ,  Jae-Moung Kim

发明人： Ming-Lu Jin ,  Soo-Young Kim ,  Seong-Pal Lee ,  Do-Seob Ahn ,  Deock-Gil Oh ,  Jae-Moung Kim

IPC分类号： H03F1/26

CPC分类号： H03F1/3241

摘要： A fast LUT predistortion apparatus and method for compensating nonlinear distortion of the high power amplifier HPA is disclosed. The apparatus includes a predistortion unit for predistorting an input complex digital signal based on a look up table LUT implementation and outputting a predistorted complex signal; and a power amplifier for amplifying the predistorted signal and outputting an amplified complex signal.

摘要翻译： 公开了用于补偿高功率放大器HPA的非线性失真的快速LUT预失真装置和方法。 该装置包括：预失真单元，用于基于查找表LUT实现预失真输入复数数字信号并输出​​预失真的复信号; 以及用于放大预失真信号并输出​​放大的复合信号的功率放大器。

公开(公告)号：US20060190271A1

公开(公告)日：2006-08-24

申请号：US10547236

申请日：2003-12-30

申请人： Soo Kim ,  Deock-Gil Oh ,  Jae-Moung Kim

发明人： Soo Kim ,  Deock-Gil Oh ,  Jae-Moung Kim

IPC分类号： G06Q99/00

CPC分类号： H03M13/2963 ,  H03M13/033 ,  H03M13/152 ,  H03M13/29 ,  H03M13/2909 ,  H03M13/2918 ,  H03M13/47 ,  H03M13/635 ,  H03M13/6368 ,  H03M13/6381 ,  H04L1/0009 ,  H04L1/0057 ,  H04L1/0069 ,  H04L1/1819

摘要： Provided is a method for forming a rate compatible code using high dimensional product codes and a computer-readable recording medium for recording a program that implements the program. The rate compatible code, which can provide various encoding rates, is formed by discriminating parity blocks and determining a punctured pattern for each parity block, m being more than two. The method includes the steps of: a) forming an m dimensional product code by using a systematic block code; b) dividing the m dimensional product code into an information block and 2m-1 parity blocks; c) allocating indices to the divided blocks of the information block and 2m-1 parity blocks; d) finding all combinations of the information block and the parity blocks which are adjacent to the information block; e) estimating a first weighting factor of w1 for the all combinations; f) if there are first combinations having the same weighting factor w1, estimating a second weighting factor of w2 for the first combinations having the same weighting factor w1 as second combinations; g) selecting a combination having largest weighting factor among the second combinations having the second weighting factor w2; and h) forming rate compatible codes by using the selected combinations based on the w1 and w2.

摘要翻译： 提供了一种使用高维产品代码形成速率兼容代码的方法和用于记录实现该程序的程序的计算机可读记录介质。 可以提供各种编码速率的速率兼容码通过区分奇偶校验块并确定每个奇偶校验块的穿孔模式，m大于2。 该方法包括以下步骤：a）使用系统块码形成m维乘积码; b）将m维乘积代码划分为信息块和2个奇偶校验块; c）向信息块的分割块和2个奇偶校验块分配索引; d）查找与信息块相邻的信息块和奇偶校验块的所有组合; e）估计所有组合的w 1的第一加权因子; f）如果存在具有相同权重因子w 1的第一组合，则估计具有相同权重因子w 1的第一组合的w 2的第二加权因子， 1 作为第二组合; g）在具有第二加权因子w 2 2的第二组合中选择具有最大权重因子的组合; 以及h）通过使用所选择的组合基于w 1和w 2 2形成速率兼容代码。

公开(公告)号：US07206333B2

公开(公告)日：2007-04-17

申请号：US10410832

申请日：2003-04-09

申请人： Kwon-Hue Choi ,  Soo-Young Kim ,  Kwang-Jae Lim ,  Deock-Gil Oh

发明人： Kwon-Hue Choi ,  Soo-Young Kim ,  Kwang-Jae Lim ,  Deock-Gil Oh

IPC分类号： H04B1/00

CPC分类号： H04L5/026

摘要： Disclosed is a method for using a different symbol timing for users so as to reduce a multiple access interference component in a multi-carrier code division multiple access (MC-CDMA) system. For this purpose, the presented invention involves dividing the users of the MC-CDMA system into two groups and applying an offset to the symbol timing between the user groups to cause a symbol transition of the opposite user group in the middle of the symbol interval, thereby reducing the multiple access interference component included in a symbol decision variable after a chip combination.

摘要翻译： 公开了一种对于用户使用不同的符号定时以减少多载波码分多址（MC-CDMA）系统中的多址干扰分量的方法。 为此，本发明涉及将MC-CDMA系统的用户划分成两组，并将偏移应用于用户组之间的符号定时，以在符号间隔的中间引起相对用户组的符号转换， 从而在芯片组合之后减少包括在符号判定变量中的多址干扰分量。

公开(公告)号：US07443904B2

公开(公告)日：2008-10-28

申请号：US10699224

申请日：2003-10-30

申请人： Kwon-Hue Choi ,  Kun-Seok Kang ,  Soo-Young Kim ,  Deock-Gil Oh

发明人： Kwon-Hue Choi ,  Kun-Seok Kang ,  Soo-Young Kim ,  Deock-Gil Oh

IPC分类号： H04B1/00

CPC分类号： H04L27/2621 ,  H04B1/707 ,  H04B2201/70706 ,  H04L5/0021 ,  H04L25/03866 ,  H04L27/2602

摘要： Disclosed is an MC-CDMA scrambling system and method, and a recording medium for storing a program thereof. A transmitter receives user's bit streams, uses a fixed scrambling code, determined according to the user's orthogonal code combinations or the number of users and having a length equal to the number of subcarriers, and generates and outputs multicarrier signals. A receiver uses the scrambling code equal to that used by the transmitter, and receives the multicarrier signals from the transmitter, thereby converting the scrambling codes according to the users' orthogonal code combinations irrespective of user data, and easily reducing the PAPR (peak-to-average power ratio).

摘要翻译： 公开了一种MC-CDMA加扰系统和方法，以及用于存储其程序的记录介质。 发射机接收用户的比特流，使用根据用户的正交码组合或用户数量确定的长度等于子载波数量的固定扰码，并产生并输出多载波信号。 接收机使用等于发射机使用的扰码，并且从发射机接收多载波信号，从而根据用户的正交码组合转换扰码，而与用户数据无关，并且容易地减少PAPR（峰 - - 平均功率比）。

公开(公告)号：US07349460B2

公开(公告)日：2008-03-25

申请号：US10322069

申请日：2002-12-17

申请人： Kwon-Hue Choi ,  Soo-Young Kim ,  Deock-Gil Oh

发明人： Kwon-Hue Choi ,  Soo-Young Kim ,  Deock-Gil Oh

IPC分类号： H04B1/00

CPC分类号： H04L1/0071 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0033 ,  H04L1/08 ,  H04L5/026 ,  H04L27/0008 ,  H04L27/2602

摘要： Provided are multi-carrier (MC)/multi-carrier direct sequence (MC-DS) dual-mode adaptable CDMA apparatus, the method thereof, and a computer program that implements the method. The apparatus can vary the user modulation degree and the transmission repetition degree independently, and convert a spreading scheme between the time-based spreading scheme (MC-DS-CDMA) and the frequency-based spreading scheme (MC-CDMA) in a MC-CDMA system. The apparatus includes: a user signal processing unit for performing symbol modulation, repetition and spreading of bit stream for each user based on a transmission mode suitable for channel environment of each user, and generating spread chip streams for the user; a combining unit for adding up all the spread chip streams for the users; a first interleaving unit for interleaving the chip streams added up in the combining unit and generating a first interleaved stream; and a second interleaving unit for optionally performing a second interleaving on the first interleaved stream.

摘要翻译： 提供了多载波（MC）/多载波直接序列（MC-DS）双模适应性CDMA装置及其方法，以及实现该方法的计算机程序。 该装置可以独立地改变用户调制度和传输重复度，并且在MC-CDMA系统中将基于时间的扩展方案（MC-DS-CDMA）和基于频率的扩频方案（MC-CDMA）之间的扩展方案进行转换， CDMA系统。 该装置包括：用户信号处理单元，用于基于适合于每个用户的信道环境的传输模式，为每个用户执行比特流的符号调制，重复和扩展，并为用户生成扩展芯片流; 组合单元，用于将用户的所有扩展芯片流相加; 第一交织单元，用于交织在所述组合单元中相加的码流，并产生第一交错流; 以及第二交织单元，用于可选地在所述第一交错流上执行第二交织。

公开(公告)号：US20120147939A1

公开(公告)日：2012-06-14

申请号：US13314770

申请日：2011-12-08

申请人： Jae-Hee HAN ,  Pan-Soo Kim ,  Deock-Gil Oh ,  Xavier Giraud

发明人： Jae-Hee HAN ,  Pan-Soo Kim ,  Deock-Gil Oh ,  Xavier Giraud

IPC分类号： H04L7/00 ,  H04L1/00

CPC分类号： H04B7/2125 ,  H04B7/18589 ,  H04L7/04 ,  H04L2027/0024 ,  H04L2027/0067 ,  H04L2027/0079 ,  H04L2027/0095

摘要： A technology for modulating and demodulating a burst signal in a return link of a satellite system, in which the burst signal is modulated and transmitted from a transmission end of the return link and a symbol of the burst signal is identified and demodulated at a receiving end. The method includes estimating symbol timing of a burst received through the return link and synchronizing the estimated symbol timing of the burst to reference symbol timing; synchronizing a location of the timing-synchronized burst having the symbol timing synchronized to a location of a reference burst using a preamble symbol and a post-amble symbol of the timing-synchronized burst; and recovering a carrier of the location-synchronized burst whose location has been synchronized to the location of the reference burst using a pilot symbol of the location-synchronized burst.

摘要翻译： 一种用于调制和解调卫星系统的返回链路中的突发信号的技术，其中突发信号从返回链路的发送端被调制和发送，并且在接收端被识别和解调 。 该方法包括估计通过返回链路接收的脉冲串的符号定时，并将脉冲串的估计符号定时与参考符号定时同步; 使用前导码符号和定时同步脉冲串的后导码符号来将具有与参考突发的位置同步的符号定时的定时同步突发的位置同步; 以及使用位置同步突发的导频符号来恢复其位置已被同步到参考突发的位置的位置同步突发的载波。

公开(公告)号：US07782823B2

公开(公告)日：2010-08-24

申请号：US11305587

申请日：2005-12-16

申请人： Ki-Dong Lee ,  Deock-Gil Oh ,  Ho-Jin Lee

发明人： Ki-Dong Lee ,  Deock-Gil Oh ,  Ho-Jin Lee

IPC分类号： H04Q7/00

CPC分类号： H04L41/0896 ,  H04W28/20

摘要： Provided are an apparatus for estimating an increment in the number of packets arriving at a transmission queue of each terminal and allocating resources to terminals based on the increment in a Demand Assignment Multiple Access (DAMA) satellite communication system, and a method thereof. The method, includes the steps of: a) comparing a summation of requested time slot quantities of terminals with a total number of available time slots; and b) allocating the time slots as much as the requested time slot quantity to each terminal and allocating remaining time slots additionally in proportion to an estimated increase in the number of packets arriving at a transmission queue of each terminal. The apparatus can raise efficiency of resources allocation in DAMA communications and reduce the packet transmission time in a terminal transmission queue.

摘要翻译： 提供了一种用于估计到达每个终端的传输队列的分组数量的增量的装置，并且基于在请求分配多路访问（DAMA）卫星通信系统中的增量向终端分配资源及其方法。 该方法包括以下步骤：a）将所请求的终端时隙量的总和与可用时隙的总数进行比较; 以及b）将所请求的时隙数量的时隙分配给每个终端，并且分配剩余时隙，以与到达每个终端的传输队列的分组数量的估计增加成比例地分配剩余时隙。 该装置可以提高DAMA通信中资源分配的效率，并减少终端传输队列中的分组传输时间。

公开(公告)号：US07697639B2

公开(公告)日：2010-04-13

申请号：US11442078

申请日：2006-05-25

申请人： Il-Han Kim ,  Joon-Gyu Ryu ,  Ho-Kyom Kim ,  Deock-Gil Oh

发明人： Il-Han Kim ,  Joon-Gyu Ryu ,  Ho-Kyom Kim ,  Deock-Gil Oh

IPC分类号： H03D3/22

CPC分类号： H04L27/0012 ,  H04L27/22

摘要： Provided are an apparatus and method for robust Binary Phase Shift Keying/Quadrature Phase Shift Keying (BPSK/QPSK) blind modulation classification. The apparatus includes first and second likelihood value calculators for calculating a likelihood value of a received baseband signal each for of BPSK and QPSK modulation modes. A maximum setting unit derives a maximum value of the likelihood values or ith likelihood ratios calculated by the first and second likelihood value calculators. A flag is set for the maximum value to “1” and a flag for the remaining value is set to “0”. First and second flag combining units combine the flags for the modulation modes. A modulation mode flag setting unit selects a maximum value from the flags combined by the first and second flag combining units.

摘要翻译： 提供了用于鲁棒二进制相移键控/正交相移键控（BPSK / QPSK）盲调制分类的装置和方法。 该装置包括用于计算每个用于BPSK和QPSK调制模式的接收基带信号的似然值的第一和第二似然值计算器。 最大设置单元导出由第一和第二似然值计算器计算的似然值或第i似然比的最大值。 设置最大值为“1”的标志，剩余值的标志设置为“0”。 第一和第二标志组合单元组合用于调制模式的标志。 调制模式标志设置单元从由第一和第二标志组合单元组合的标志中选择最大值。