公开(公告)号：US08116406B2

公开(公告)日：2012-02-14

申请号：US12096119

申请日：2006-12-07

申请人： Dae-Ig Chang ,  Deock-Gil Oh ,  Kwang-Min Hyun ,  Dong-Weon Yoon ,  Sang-Kyu Park

发明人： Dae-Ig Chang ,  Deock-Gil Oh ,  Kwang-Min Hyun ,  Dong-Weon Yoon ,  Sang-Kyu Park

IPC分类号： H04L27/00

CPC分类号： H04L25/067 ,  H04L1/005 ,  H04L27/38

摘要： Provided are an apparatus and method for generating a soft bit metric and a multi-level (M-ary) Quadrature Amplitude Modulation (QAM) receiving system using the same. The apparatus includes an analog to digital converter for converting an analog symbol signal of a demodulated I (Inphase) or Q (Quadrature) channel into a digital signal, a scaler for scaling the converted digital signal based on a reference value used for determining a space between symbols, a positive integer converter for calculating a positive integer of the scaled digital I or Q channel symbol signal, a sign determinator for determining a sign of the scaled digital I or Q channel symbol signal, and a bit information converter for converting the scaled digital I or Q channel symbol signal into soft bit metric information per bit on the basis of the calculated positive integer and the determined sign value.

摘要翻译： 提供了一种用于生成软比特度量的装置和方法以及使用其的多级（M元）正交幅度调制（QAM）正交调制（QAM）接收系统。 该装置包括用于将解调的I（同相）或Q（正交）信道的模拟符号信号转换为数字信号的模数转换器，用于根据用于确定空间的参考值对转换的数字信号进行缩放的缩放器 在符号之间，用于计算缩放的数字I或Q信道符号信号的正整数的正整数转换器，用于确定缩放的数字I或Q信道符号信号的符号的符号确定器，以及用于将缩放的 基于计算的正整数和确定的符号值，将数字I或Q通道符号信号转换为每位的软比特度量信息。

公开(公告)号：US08085818B2

公开(公告)日：2011-12-27

申请号：US12518242

申请日：2007-10-31

申请人： Pan-Soo Kim ,  Dae-Ig Chang ,  Deock-Gil Oh ,  Sangtae Kim ,  Seokheon Kang ,  Wonjin Sung

发明人： Pan-Soo Kim ,  Dae-Ig Chang ,  Deock-Gil Oh ,  Sangtae Kim ,  Seokheon Kang ,  Wonjin Sung

IPC分类号： H04J3/06

CPC分类号： H04N21/4382 ,  H04H40/90 ,  H04L7/042 ,  H04L27/2656 ,  H04N7/20 ,  H04N21/238 ,  H04N21/2383 ,  H04N21/242 ,  H04N21/6143

摘要： Provided is a method for detecting frame sync and frame structure in a satellite broadcasting system. The method for detecting frame sync and frame structure includes the steps of: calculating differential correlation values of reception symbols; generating index sequences of reception symbols whose differential correlation values calculated above exceed a threshold value; calculating positions estimated as frame start points which correspond to a total frame number based on the number of symbols per frame for each frame structure; and detecting frame sync and frame structure based on the umber of positions where the above-calculated frame start point estimated positions and the above-generated index sequences are matched.

摘要翻译： 提供了一种用于在卫星广播系统中检测帧同步和帧结构的方法。 用于检测帧同步和帧结构的方法包括以下步骤：计算接收符号的差分相关值; 产生上述计算出的差分相关值的接收符号的索引序列超过阈值; 基于每个帧结构的每个符号的数量，计算估计为与总帧数相对应的帧起始点的位置; 以及基于上述计算出的帧起始点估计位置和上述生成的索引序列匹配的位置的数量来检测帧同步和帧结构。

公开(公告)号：US20080285591A1

公开(公告)日：2008-11-20

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： H04L29/02

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：US20070150796A1

公开(公告)日：2007-06-28

申请号：US11442363

申请日：2006-05-26

申请人： Pan-Soo Kim ,  Dae-Ig Chang ,  In-Ki Lee ,  Tae-Hoon Kim ,  Deock-Gil Oh ,  Wonjin Sung ,  Seokheon Kang ,  Deokchang Kang

发明人： Pan-Soo Kim ,  Dae-Ig Chang ,  In-Ki Lee ,  Tae-Hoon Kim ,  Deock-Gil Oh ,  Wonjin Sung ,  Seokheon Kang ,  Deokchang Kang

IPC分类号： H03M13/00

CPC分类号： H04L1/0045 ,  H03M13/136 ,  H03M13/15 ,  H03M13/6561 ,  H04H40/90 ,  H04L1/0057 ,  H04L1/0072 ,  H04L1/08

摘要： Provided is a decoding method for detecting Physical Layer Signaling Codes (PLSCs) from frames of a satellite broadcasting system. The method includes: a) acquiring a summation vector and a subtraction vector from an inputted symbol vector; b) performing parallel Reed-Muller (32,6) decoding onto the summation and subtraction vectors based on a Hadamard matrix and estimating message bits of the summation and subtraction vectors; c) performing PLSC coding and modulation onto the message bits of the summation and subtraction vectors; d) calculating a first difference between symbols of the received symbol vector and the summation vector symbols, and a second difference between the symbols of the received symbol vector and the subtraction vector symbols; and e) when the first difference is smaller than the second difference, determining a Reed-Muller codeword is repeated, or when the first difference is larger than the second difference, determining that the Reed-Muller codeword is inverted.

摘要翻译： 提供了一种从卫星广播系统的帧中检测物理层信令码（PLSC）的解码方法。 该方法包括：a）从输入的符号向量获取求和向量和减法向量; b）基于Hadamard矩阵对求和和减法向量执行并行Reed-Muller（32,6）解码并估计求和和减法向量的消息比特; c）对求和和减法向量的消息比特执行PLSC编码和调制; d）计算接收的符号向量和求和向量符号的符号之间的第一差值，以及接收到的符号向量和减法向量符号的符号之间的第二差值; 以及e）当第一差小于第二差时，重复确定里德 - 穆勒码字，或者当第一差大于第二差时，确定里德 - 穆勒码字被反转。

公开(公告)号：US20070133727A1

公开(公告)日：2007-06-14

申请号：US11442447

申请日：2006-05-26

申请人： Pan-Soo Kim ,  In-Ki Lee ,  Tae-Hoon Kim ,  Dae-Ig Chang ,  Deock-Gil Oh ,  Wonjin Sung ,  Deokchang Kang ,  Seokheon Kang

发明人： Pan-Soo Kim ,  In-Ki Lee ,  Tae-Hoon Kim ,  Dae-Ig Chang ,  Deock-Gil Oh ,  Wonjin Sung ,  Deokchang Kang ,  Seokheon Kang

IPC分类号： H04L7/00 ,  H04B1/00 ,  H04J3/06

CPC分类号： H04J3/0608 ,  H04B7/2125

摘要： Provided is a frame synchronization method for synchronizing frames with pilot blocks added thereto based on differential correlation information in a satellite communication system. The method can acquire a highly reliable frame synchronization estimation value by achieving a multi-step threshold value test using pilot blocks after a correlation analysis and a threshold test based on a sync signal in order to resolve the problem of a low signal-to-noise ratio and a large frequency error and acquire highly reliable frame synchronization performance, and can overcome distortion of a correlation analysis value caused by the frequency error by analyzing correlation based on differential information. The method includes the steps of: a) performing correlation analysis and a threshold test by using a sync word; and b) performing a multi-step correlation value test by using the pilot blocks added to the frames prior to the sync word.

公开(公告)号：US07761777B2

公开(公告)日：2010-07-20

申请号：US11518247

申请日：2006-09-11

申请人： In-Ki Lee ,  Dae-Ig Chang ,  Deock-Gil Oh

发明人： In-Ki Lee ,  Dae-Ig Chang ,  Deock-Gil Oh

IPC分类号： H03M13/00

CPC分类号： H04L27/3488 ,  H04L1/005 ,  H04L1/0053 ,  H04L1/0057 ,  H04L1/08 ,  H04L25/067

摘要： A soft decision demapping method includes defining distance values between a received signal and coordinates of constellation dots, obtaining a difference between a maximum value of distance values when a first bit is 0 and a maximum value of distance values when the first bit is 1, during a soft decision of the first bit of N-bit received signal symbol, acquiring a difference between a maximum value of distance values when a second bit is 0 and a maximum value of distance values when the second bit is 1, during a soft decision of the second bit of the N-bit received signal symbol, and deriving a difference between a maximum value of distance values when an Nth bit is 0 and a maximum value of distance values when the Nth bit is 1, during a soft decision of the Nth bit of the N-bit received signal symbol.

摘要翻译： 软判决解映射方法包括：定义接收信号和星座点坐标之间的距离值，获得当第一位为0时距离值的最大值与第一位为1时距离值的最大值之间的差值 在第二比特为0时获取第一比特的距离值的最大值与第二比特为1时的距离值的最大值之间的差的软判决， N位接收信号符号的第二位，并且在第N位的软判决期间得出第N位为0时的距离值的最大值与第N位为1时的距离值的最大值之间的差 位的N位接收信号符号。

公开(公告)号：US07587653B2

公开(公告)日：2009-09-08

申请号：US11442363

申请日：2006-05-26

申请人： Pan-Soo Kim ,  Dae-Ig Chang ,  In-Ki Lee ,  Tae-Hoon Kim ,  Deock-Gil Oh ,  Wonjin Sung ,  Seokheon Kang ,  Deokchang Kang

发明人： Pan-Soo Kim ,  Dae-Ig Chang ,  In-Ki Lee ,  Tae-Hoon Kim ,  Deock-Gil Oh ,  Wonjin Sung ,  Seokheon Kang ,  Deokchang Kang

IPC分类号： H03M13/05

CPC分类号： H04L1/0045 ,  H03M13/136 ,  H03M13/15 ,  H03M13/6561 ,  H04H40/90 ,  H04L1/0057 ,  H04L1/0072 ,  H04L1/08

摘要： Provided is a decoding method for detecting Physical Layer Signaling Codes (PLSCs) from frames of a satellite broadcasting system. The method includes: a) acquiring a summation vector and a subtraction vector from an inputted symbol vector; b) performing parallel Reed-Muller (32,6) decoding onto the summation and subtraction vectors based on a Hadamard matrix and estimating message bits of the summation and subtraction vectors; c) performing PLSC coding and modulation onto the message bits of the summation and subtraction vectors; d) calculating a first difference between symbols of the received symbol vector and the summation vector symbols, and a second difference between the symbols of the received symbol vector and the subtraction vector symbols; and e) when the first difference is smaller than the second difference, determining a Reed-Muller codeword is repeated, or when the first difference is larger than the second difference, determining that the Reed-Muller codeword is inverted.

摘要翻译： 提供了一种从卫星广播系统的帧中检测物理层信令码（PLSC）的解码方法。 该方法包括：a）从输入的符号向量获取求和向量和减法向量; b）基于Hadamard矩阵对求和和减法向量执行并行Reed-Muller（32,6）解码并估计求和和减法向量的消息比特; c）对求和和减法向量的消息比特执行PLSC编码和调制; d）计算接收的符号向量和求和向量符号的符号之间的第一差值，以及接收到的符号向量和减法向量符号的符号之间的第二差值; 以及e）当第一差小于第二差时，重复确定里德 - 穆勒码字，或者当第一差大于第二差时，确定里德 - 穆勒码字被反转。

公开(公告)号：US07308064B2

公开(公告)日：2007-12-11

申请号：US11442447

申请日：2006-05-26

申请人： Pan-Soo Kim ,  In-Ki Lee ,  Tae-Hoon Kim ,  Dae-Ig Chang ,  Deock-Gil Oh ,  Wonjin Sung ,  Deokchang Kang ,  Seokheon Kang

发明人： Pan-Soo Kim ,  In-Ki Lee ,  Tae-Hoon Kim ,  Dae-Ig Chang ,  Deock-Gil Oh ,  Wonjin Sung ,  Deokchang Kang ,  Seokheon Kang

IPC分类号： H04L7/00

CPC分类号： H04J3/0608 ,  H04B7/2125

摘要： Provided is a frame synchronization method for synchronizing frames with pilot blocks added thereto based on differential correlation information in a satellite communication system. The method can acquire a highly reliable frame synchronization estimation value by achieving a multi-step threshold value test using pilot blocks after a correlation analysis and a threshold test based on a sync signal in order to resolve the problem of a low signal-to-noise ratio and a large frequency error and acquire highly reliable frame synchronization performance, and can overcome distortion of a correlation analysis value caused by the frequency error by analyzing correlation based on differential information. The method includes the steps of: a) performing correlation analysis and a threshold test by using a sync word; and b) performing a multi-step correlation value test by using the pilot blocks added to the frames prior to the sync word.

摘要翻译： 提供了一种帧同步方法，用于基于卫星通信系统中的差分相关信息来将帧与其添加的导频块同步。 该方法可以通过在相关分析和基于同步信号的阈值测试之后使用导频块实现多步阈值测试来获得高度可靠的帧同步估计值，以便解决低信噪比的问题 比例大，频率误差大，获得高可靠性的帧同步性能，可以通过分析基于差分信息的相关性来克服由频率误差引起的相关分析值的失真。 该方法包括以下步骤：a）通过使用同步字执行相关分析和阈值测试; 以及b）通过使用添加到同步字之前的帧的导频块来执行多步相关值测试。

公开(公告)号：US20070133725A1

公开(公告)日：2007-06-14

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： H04N7/20 ,  H04L7/00

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

摘要： Provided are an apparatus and method for correcting a frequency offset in a satellite digital video broadcasting system. The apparatus includes: a frequency response transformer for receiving a satellite digital video broadcasting signal and acquiring a plurality of frequency responses divided into a positive frequency part and a negative frequency part; a rotation/difference value calculation unit for selecting one of the plurality of frequency responses inputted from the frequency response transformer and calculating a first area difference value indicating a difference in area between the positive frequency part and the negative frequency part without rotation for the selected frequency response, and calculating a second area difference value indicating a difference in area between the positive frequency component and the negative frequency component 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 area difference value and the second area difference value by the first area difference 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 provided from the zero intersection point calculator to thereby estimate the frequency offset.

摘要翻译： 提供了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。 该装置包括：频率响应变压器，用于接收卫星数字视频广播信号并获取分成正频率部分和负频率部分的多个频率响应; 旋转/差值计算单元，用于选择从频率响应变换器输入的多个频率响应中的一个频率响应，并且计算指示正频率部分和负频率部分之间的面积差的第一区域差值，而不是所选频率的旋转 响应，并且计算指示所述正频率分量和所述负频率分量之间的区域的差异的第二面积差值，其中所述正频率分量和所述负频率分量之间的剩余频率响应的旋转; 零交叉点计算器，用于将由第一区域差值和第二区域差值形成的直线的平均斜率除以第一区域差值，并且计算直线上的区域差值的零交叉点; 以及频率偏移估计器，用于校正从零交叉点计算器提供的零交叉点，从而估计频率偏移。

公开(公告)号：US20070133718A1

公开(公告)日：2007-06-14

申请号：US11518247

申请日：2006-09-11

申请人： In-Ki Lee ,  Dae-Ig Chang ,  Deock-Gil Oh

发明人： In-Ki Lee ,  Dae-Ig Chang ,  Deock-Gil Oh

IPC分类号： H03D1/00 ,  H03M13/03

CPC分类号： H04L27/3488 ,  H04L1/005 ,  H04L1/0053 ,  H04L1/0057 ,  H04L1/08 ,  H04L25/067

摘要： Provided are a soft decision demapping method suitable for higher-order modulation for an iterative decoder and an error correction apparatus using the same, which are capable of preventing performance deterioration of repetition codes using an efficient technique. The soft decision demapping method includes defining distance values between a received signal and coordinates of constellation dots, obtaining a difference between a maximum value of distance values when a first bit is 0 and a maximum value of distance values when the first bit is 1, during a soft decision of the first bit of N-bit received signal symbol, acquiring a difference between a maximum value of distance values when a second bit is 0 and a maximum value of distance values when the second bit is 1, during a soft decision of the second bit of the N-bit received signal symbol, and deriving a difference between a maximum value of distance values when an Nth bit is 0 and a maximum value of distance values when the Nth bit is 1, during a soft decision of the Nth bit of the N-bit received signal symbol.

摘要翻译： 提供了一种适用于迭代解码器的高阶调制的软决策解映射方法和使用其的纠错装置，其能够使用有效技术来防止重复码的性能恶化。 软决策解映射方法包括定义接收信号与星座点坐标之间的距离值，获得当第一位为0时距离值的最大值与第一位为1时的距离值的最大值之间的差值 在第二比特为0时获取第一比特的距离值的最大值与第二比特为1时的距离值的最大值之间的差的软判决， N位接收信号符号的第二位，并且在第N位的软判决期间得出第N位为0时的距离值的最大值与第N位为1时的距离值的最大值之间的差 位的N位接收信号符号。