公开(公告)号：US08537880B2

公开(公告)日：2013-09-17

申请号：US13324351

申请日：2011-12-13

申请人： Vikas Agarwal ,  Pan-Soo Kim ,  Deock-Gil Oh

发明人： Vikas Agarwal ,  Pan-Soo Kim ,  Deock-Gil Oh

IPC分类号： H04W56/00

CPC分类号： H04H40/90

摘要： Provided is a frame synchronization apparatus capable of reducing the amount of total computation and computation delays when a receiver of a satellite communication system calculates correlation between an input signal for frame synchronization and a signal sequence of the receiver, since the receiver uses no multiplier. The frame synchronization apparatus includes a correlator to obtain a correlation value of a unique word of a receiver with respect to a symbol data stream of a frame received from a transmitter of the satellite communication system, a comparator to compare the correlation value to a predetermined threshold value, and a determiner to determine whether the frame has been synchronized, based on the result of the comparison by the comparator.

摘要翻译： 提供了一种帧同步装置，当卫星通信系统的接收机计算用于帧同步的输入信号与接收机的信号序列之间的相关性时，能够减少总计算量和计算延迟量，因为接收机不使用乘法器。 帧同步装置包括相关器，用于相对于从卫星通信系统的发射机接收到的帧的符号数据流获得接收机的唯一字的相关值;将相关值与预定阈值进行比较的比较器 值，以及基于比较器的比较结果来确定帧是否已被同步的确定器。

公开(公告)号：US07978732B2

公开(公告)日：2011-07-12

申请号：US12094325

申请日：2006-12-11

申请人： Pan-Soo Kim ,  In-Ki Lee ,  Tae-Hoon Kim ,  Dae-Ig Chang ,  Deock-Gil Oh ,  Won-Jin Sung ,  Deok-Chang Kang ,  Seok-Heon Kang

发明人： Pan-Soo Kim ,  In-Ki Lee ,  Tae-Hoon Kim ,  Dae-Ig Chang ,  Deock-Gil Oh ,  Won-Jin Sung ,  Deok-Chang Kang ,  Seok-Heon Kang

IPC分类号： H04J3/16

CPC分类号： H04L1/0003 ,  H04L1/0007 ,  H04L1/0009 ,  H04L1/0038 ,  H04L2001/0093 ,  H04N21/2343 ,  H04N21/2383 ,  H04N21/2404 ,  H04N21/4382

摘要： Provided are an apparatus and method for deciding a transmission format using a variable frame length and a decoding method using the same. The apparatus for deciding the transmission format using the variable frame length includes: a frame synchronization acquiring unit for acquiring a frame synchronization of a received transmission frame; a correlation analyzing unit for performing a correlation analysis with respect to the transmission frame whose synchronization is acquired, considering frame lengths of respective frame structures; and a transmission frame structure deciding unit for deciding the structure of the received transmission frame using the analyzed correlation. Accordingly, a physical layer signaling code (PLSC) demodulation and decoding performance can be enhanced by determining the structure of the transmitted frame without carrying out a PLSC decoding in such a state that a frequency synchronization is not acquired.

摘要翻译： 提供了一种使用可变帧长度来决定传输格式的装置和方法以及使用其的解码方法。 用于使用可变帧长度确定传输格式的装置包括：帧同步获取单元，用于获取接收到的传输帧的帧同步; 相关分析单元，考虑相应帧结构的帧长度，执行相对于获取同步的传输帧的相关分析; 以及传输帧结构决定单元，用于使用所分析的相关来确定所接收的传输帧的结构。 因此，通过在不获取频率同步的状态下确定发送帧的结构而不执行PLSC解码，可以增强物理层信令码（PLSC）解调和解码性能。

公开(公告)号：US07720182B2

公开(公告)日：2010-05-18

申请号：US11636243

申请日：2006-12-08

申请人： Tae-Hoon Kim ,  Pan-Soo Kim ,  Dae-Ig Chang ,  Deock-Gil Oh ,  Seong-Jun Lee

发明人： Tae-Hoon Kim ,  Pan-Soo Kim ,  Dae-Ig Chang ,  Deock-Gil Oh ,  Seong-Jun Lee

IPC分类号： H04L1/00

CPC分类号： H04B7/18523 ,  H04L27/2657 ,  H04L27/2672 ,  H04L27/2676

摘要： An apparatus and method for correcting a frequency offset in a satellite digital video broadcasting system includes a frequency response transformer for receiving a satellite digital video broadcasting signal and acquiring frequency responses divided into positive and negative frequency parts; a rotation/difference value calculation unit for selecting a frequency response inputted from the frequency response transformer and calculating a first value indicating a difference in area without rotation for the selected frequency response, and calculating a second value indicating a difference in area with rotation for the remaining frequency responses; a zero intersection point calculator for dividing an average slope of a straight line formed by the first and second values by the first value, and calculating a zero intersection point of an area difference value on the straight line; and a frequency offset estimator for correcting the zero intersection point to thereby estimate the frequency offset.

摘要翻译： 一种用于校正卫星数字视频广播系统中的频率偏移的装置和方法包括：频率响应变换器，用于接收卫星数字视频广播信号并获取被分为正，负频率部分的频率响应; 旋转/差值计算单元，用于选择从频率响应变换器输入的频率响应，并计算指示所选择的频率响应的不旋转的面积差的第一值，并且计算表示针对所选择的频率响应的旋转区域的差异的第二值 剩余频率响应; 零交叉点计算器，用于将由第一和第二值形成的直线的平均斜率除以第一值，并计算直线上面积差值的零交叉点; 以及用于校正零交叉点从而估计频率偏移的频率偏移估计器。

公开(公告)号：US20080273585A1

公开(公告)日：2008-11-06

申请号：US12094851

申请日：2006-09-11

申请人： Pan-Soo Kim ,  Byoung-Hak Kim ,  Yun-Jeong Song ,  Deock-Gil Oh ,  Ho-Jin Lee ,  Jun Heo ,  Joong-Gon Ryoo

发明人： Pan-Soo Kim ,  Byoung-Hak Kim ,  Yun-Jeong Song ,  Deock-Gil Oh ,  Ho-Jin Lee ,  Jun Heo ,  Joong-Gon Ryoo

IPC分类号： H04B17/00 ,  H04L7/00

CPC分类号： H04L27/0014 ,  H04L2027/0057 ,  H04L2027/0067

摘要： Provided are an apparatus for estimating a phase error and a phase error correcting system using the phase error estimating apparatus. The apparatus includes: a probability value estimating unit for estimating a negative log probability value for each transmission symbol by transforming a soft output information transferred from the outside to a log A posterior probability ratio (LAPPR) value; an APP value calculating unit for calculating a posterior probability (APP) value by applying a negative exponential function to the transmission symbol; an average value deciding unit for deciding an average value for each transmission symbol using the probability information entirely, partially, or selectively according to a probability information type; and a symbol phase estimating unit for estimating a phase of a symbol based on the decided average value.

摘要翻译： 提供了一种使用相位误差估计装置估计相位误差的装置和相位误差校正系统。 该装置包括：概率值估计单元，用于通过将从外部传送的软输出信息变换为对数A后验概率比（LAPPR）值来估计每个发送符号的负对数概率值; APP值计算单元，用于通过对发送符号应用负指数函数来计算后验概率（APP）值; 平均值确定单元，用于根据概率信息类型完全，部分或选择地使用概率信息来确定每个传输符号的平均值; 以及符号相位估计单元，用于基于所确定的平均值来估计符号的相位。

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。

公开(公告)号：US20060115013A1

公开(公告)日：2006-06-01

申请号：US11184592

申请日：2005-07-19

申请人： Il Kim ,  Ho-Kyom Kim ,  Deock-Gil Oh ,  Ho-Jin Lee

发明人： Il Kim ,  Ho-Kyom Kim ,  Deock-Gil Oh ,  Ho-Jin Lee

IPC分类号： H04L23/02

CPC分类号： H04L27/0012

摘要： A blind modulation classification apparatus in a satellite communication system improves performance in non-ideal communication environment having frequency error and phase error, by reducing computational burden of test statistic and possibility of numerical error of hardware, with computation of likelihood for each stage independently. The blind modulation classification apparatus includes a plurality of likelihood computing units, each for computing a likelihood value of a received baseband signal for corresponding one of a plurality of modulation schemes; a maximum selecting and setting units for selecting the maximum among the calculated likelihood values and setting a flag corresponding to the maximum to ‘1’ and the other flags to ‘0’; a plurality of flag summing-up units for summing up the flags of the plurality of the modulation schemes; and a modulation scheme selecting unit for selecting the maximum among the summed-up values and selecting the modulation scheme corresponding to the selected value.

摘要翻译： 卫星通信系统中的盲调制分类装置通过减少测试统计量的计算负担和硬件的数值误差的可能性，通过独立地计算每个阶段的可能性来提高具有频率误差和相位误差的非理想通信环境中的性能。 盲调制分类装置包括多个似然度计算单元，每个似然运算单元用于计算多个调制方案中的相应一个的接收基带信号的似然值; 最大选择和设置单位，用于在所计算的似然值中选择最大值，并将与最大值相对应的标志设置为“1”，将其他标志设置为“0”; 多个标记求和单元，用于对多个调制方案的标志进行相加; 以及调制方式选择单元，用于选择累加值中的最大值，并选择与所选值对应的调制方案。

公开(公告)号：US07010059B2

公开(公告)日：2006-03-07

申请号：US10406094

申请日：2003-04-02

申请人： Yun-Jeong Song ,  Young-Wan Kim ,  Nae-Soo Kim ,  Deock-Gil Oh

发明人： Yun-Jeong Song ,  Young-Wan Kim ,  Nae-Soo Kim ,  Deock-Gil Oh

IPC分类号： H04L27/22

CPC分类号： H04L27/2273 ,  H04L27/3809 ,  H04L2027/0028 ,  H04L2027/0057

摘要： Disclosed is a quadrature demodulator for high-speed wireless communication, which comprises: an A/D converter for converting received signals into digital signals; a signal recovery unit for recovering carriers and symbol timing from the signals converted by the A/D converter; a decision unit for detecting recovered signals output by the signal recovery unit, and performing a decision process on them; an I/Q gain imbalance detector for detecting gain imbalances of the I and Q-phase components from the recovered signals, and outputting an I/Q gain compensation value for compensating for the gain imbalances; and an I/Q gain compensator, provided between the A/D converter and the signal recovery unit, for reflecting the I/Q gain compensation value output by the I/Q gain imbalance detector to the received signals.

摘要翻译： 公开了一种用于高速无线通信的正交解调器，其包括：A / D转换器，用于将接收到的信号转换成数字信号; 信号恢复单元，用于从由A / D转换器转换的信号中恢复载波和符号定时; 判定单元，用于检测由信号恢复单元输出的恢复信号，并对其进行决定处理; I / Q增益不平衡检测器，用于检测来自恢复信号的I相和Q相分量的增益不平衡，并输出用于补偿增益不平衡的I / Q增益补偿值; 以及设置在A / D转换器和信号恢复单元之间的用于将由I / Q增益不平衡检测器输出的I / Q增益补偿值反映到接收信号的I / Q增益补偿器。

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：US06732326B2

公开(公告)日：2004-05-04

申请号：US09846477

申请日：2001-04-30

申请人： Eun-A Choi ,  Jin-Ho Kim ,  Nae-Soo Kim ,  Deock-Gil Oh

发明人： Eun-A Choi ,  Jin-Ho Kim ,  Nae-Soo Kim ,  Deock-Gil Oh

IPC分类号： H03M1341

CPC分类号： H03M13/6362 ,  H03M13/395 ,  H03M13/3961 ,  H03M13/41 ,  H03M13/4107

摘要： A structure and a method for depuncturing an input bit stream being input to a Viterbi decoder when the Viterbi decoder is designed by using a Radix-4 branch metric calculator in a method for designing the Viterbi decoder that decodes a punctured code at a high-speed, are disclosed. A depuncture structure for Radix-4 branch metric calculation in a high-speed Viterbi decoder includes four FIFOs, four multiplexers, and one Radix-4 branch metric calculator. Two input bit streams of I and Q are connected to two upper FIFOs and two lower FIFOs. An output terminal of FIFO is connected to upper and lower multiplexers of the next stage. One output terminal of each multiplexer is connected to Radix-4 branch metric calculator. As a result, Radix-4 branch metric calculation can be achieved by using the same clock as a clock speed of the input I and Q bit streams. This structure and this method can be applied to a depuncturing process for Radix-4 branch metric calculation of all punctured codes derived from ½ code.

摘要翻译： 在维特比解码器被设计成通过在设计维特比解码器的方法中设计的维特比解码器的结构和方法被输入到维特比解码器，该维特比解码器以高速解码穿孔码 ，被披露。 在高速维特比解码器中用于基数4分支度量计算的解穿孔结构包括四个FIFO，四个多路复用器和一个基数-4分支度量计算器。 I和Q的两个输入比特流连接到两个较高的FIFO和两个较低的FIFO。 FIFO的输出端子连接到下一级的上下复用器。 每个多路复用器的一个输出端连接到基数-4分支度量计算器。 因此，可以通过使用与输入I和Q位流的时钟速度相同的时钟来实现基数-4分支度量计算。 该结构和该方法可以应用于从½码导出的所有穿孔码的基数-4分支度量计算的解穿孔过程。