公开(公告)号：US08259646B2

公开(公告)日：2012-09-04

申请号：US12517432

申请日：2007-12-03

申请人： Pan-Soo Kim ,  Dae-Ig Jang ,  Deock-Gil Oh ,  Ho-Jin Lee

发明人： Pan-Soo Kim ,  Dae-Ig Jang ,  Deock-Gil Oh ,  Ho-Jin Lee

IPC分类号： H04J3/06

CPC分类号： H04L7/042 ,  H04L7/046 ,  H04L27/0014 ,  H04L2027/003

摘要： An apparatus and method for acquiring reliable frame synchronization performance and frequency synchronization simultaneously in a communication system includes a differential correlator outputting a result value obtained by performing a differential operation based on an input signal having symbol timing synchronization and a value pre-defined with a sender sending the input signal, a frequency error calculator compensating for a frequency error based on the result value of the differential correlator and a frequency compensation control signal, and a frame synchronization determiner outputting the frequency compensation control signal if the result value of the differential correlator is greater than a threshold set having at least one value. By introducing a correlation scheme, i.e. Differential Generalized Post Detection Integration (DGPDI), in which differential information corresponding to a half of a symbol duration length is used within a duration from a frame start symbol to a UW symbol duration in a TDM/TDMA transmission structure in which a low SNR and a high frequency error must be considered, a more reliable frame synchronization estimation value can be acquired in comparison to a conventional frame synchronization scheme in which differential information between single neighbor symbols is used.

摘要翻译： 一种用于在通信系统中同时获取可靠的帧同步性能和频率同步的装置和方法包括差分相关器，其输出通过基于具有符号定时同步的输入信号执行差分运算而得到的结果值，以及预定义的发送器 发送输入信号，基于差分相关器的结果值和频率补偿控制信号来补偿频率误差的频率误差计算器，以及如果差分相关器的结果值为 大于具有至少一个值的阈值集合。 通过引入相关方案，即差分广义后检测积分（DGPDI），其中对应于符号持续时间长度的一半的差分信息在TDM / TDMA传输中的帧开始符号到UW符号持续时间的持续时间内被使用 必须考虑低SNR和高频误差的结构，与使用单个相邻符号之间的差分信息的常规帧同步方案相比，可以获得更可靠的帧同步估计值。

公开(公告)号：US20100039985A1

公开(公告)日：2010-02-18

申请号：US12517432

申请日：2007-12-03

申请人： Pan-Soo Kim ,  Dae-Ig Jang ,  Deock-Gil Oh ,  Ho-Jin Lee

发明人： Pan-Soo Kim ,  Dae-Ig Jang ,  Deock-Gil Oh ,  Ho-Jin Lee

IPC分类号： H04J3/08

CPC分类号： H04L7/042 ,  H04L7/046 ,  H04L27/0014 ,  H04L2027/003

摘要： An apparatus and method for acquiring reliable frame synchronization performance and frequency synchronization simultaneously in a communication system includes a differential correlator outputting a result value obtained by performing a differential operation based on an input signal having symbol timing synchronization and a value pre-defined with a sender sending the input signal, a frequency error calculator compensating for a frequency error based on the result value of the differential correlator and a frequency compensation control signal, and a frame synchronization determiner outputting the frequency compensation control signal if the result value of the differential correlator is greater than a threshold set having at least one value. By introducing a correlation scheme, i.e. Differential Generalized Post Detection Integration (DGPDI), in which differential information corresponding to a half of a symbol duration length is used within a duration from a frame start symbol to a UW symbol duration in a TDM/TDMA transmission structure in which a low SNR and a high frequency error must be considered, a more reliable frame synchronization estimation value can be acquired in comparison to a conventional frame synchronization scheme in which differential information between single neighbor symbols is used.

摘要翻译： 一种用于在通信系统中同时获取可靠的帧同步性能和频率同步的装置和方法包括差分相关器，其输出通过基于具有符号定时同步的输入信号执行差分运算而得到的结果值，以及预定义的发送器 发送输入信号，基于差分相关器的结果值和频率补偿控制信号来补偿频率误差的频率误差计算器，以及如果差分相关器的结果值为 大于具有至少一个值的阈值集合。 通过引入相关方案，即差分广义后检测积分（DGPDI），其中对应于符号持续时间长度的一半的差分信息在TDM / TDMA传输中的帧开始符号到UW符号持续时间的持续时间内被使用 必须考虑低SNR和高频误差的结构，与使用单个相邻符号之间的差分信息的常规帧同步方案相比，可以获得更可靠的帧同步估计值。

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：US07616710B2

公开(公告)日：2009-11-10

申请号：US11297257

申请日：2005-12-07

申请人： Pan-Soo Kim ,  Yun-Jeoug Song ,  Byoung-Hak Kim ,  Deock-Gil Oh ,  Ho-Jin Lee

发明人： Pan-Soo Kim ,  Yun-Jeoug Song ,  Byoung-Hak Kim ,  Deock-Gil Oh ,  Ho-Jin Lee

IPC分类号： H04L27/14

CPC分类号： H04L27/0014 ,  H04L2027/003 ,  H04L2027/0046 ,  H04L2027/0065

摘要： Provided is a method for estimating carrier wave or doppler frequency offset based on an approximated quadratic non-linear function in fine search, and a receiver employing the method. The method for estimating frequency offset includes the steps of: a) extracting more than three discrete samples in an order where the discrete samples are close to a maximum value of a power spectrum density function; b) inducing a quadratic non-linear function by using the extracted discrete samples; and c) estimating the frequency offset from a maximum point of the quadratic non-linear function. The technology of the present research makes it possible to exactly estimate frequency offset without increasing hardware complexity in estimation of carrier wave or doppler frequency offset.

摘要翻译： 提供了一种基于精细搜索中的近似二次非线性函数来估计载波或多普勒频率偏移的方法，以及采用该方法的接收机。 用于估计频率偏移的方法包括以下步骤：a）以离散样本接近功率谱密度函数的最大值的顺序提取三个以上的离散样本; b）通过使用提取的离散样本来诱导二次非线性函数; 以及c）从二次非线性函数的最大点估计频率偏移。 本研究的技术使得可以精确估计频偏，而不增加载波或多普勒频偏估计中的硬件复杂度。

公开(公告)号：US20080310560A1

公开(公告)日：2008-12-18

申请号：US12094717

申请日：2006-05-26

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

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

IPC分类号： H04L27/06

CPC分类号： H04L1/205 ,  H03M13/2957 ,  H03M13/296 ,  H04L1/005 ,  H04L1/0066 ,  H04L1/0071

摘要： Provided is an apparatus for estimating phase offsets of multiple survival paths and a satellite communication system using the same. The apparatus includes: upper/lower decoding units for obtaining a phase offset estimation value and estimating phase offsets of each survival path based on a stored parameter estimation value of a previous state inputted from an external device; an interleaving/de-interleaving unit for minimizing correlation between data used to estimate a parameter according to the estimated phase offset value from the upper/lower decoding means; and a phase offset outputting unit for outputting the phase offset value estimated through the upper decoding unit and the de-interleaving unit.

摘要翻译： 提供了一种用于估计多个存活路径的相位偏移的装置和使用其的卫星通信系统。 该装置包括：上/下解码单元，用于获得相位偏移估计值，并且基于从外部设备输入的先前状态的存储参数估计值来估计每个生存路径的相位偏移; 交织/解交织单元，用于根据来自上/下解码装置的估计相位偏移值，最小化用于估计参数的数据之间的相关性; 以及相位偏移输出单元，用于输出通过上部解码单元和解交织单元估计的相位偏移值。

公开(公告)号：US08045646B2

公开(公告)日：2011-10-25

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： H03K9/00

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：US20060146961A1

公开(公告)日：2006-07-06

申请号：US11297257

申请日：2005-12-07

申请人： Pan-Soo Kim ,  Yun-Jeong Song ,  Byoung-Hak Kim ,  Deock-Gil Oh ,  Ho-Jin Lee

发明人： Pan-Soo Kim ,  Yun-Jeong Song ,  Byoung-Hak Kim ,  Deock-Gil Oh ,  Ho-Jin Lee

IPC分类号： H04L27/14

CPC分类号： H04L27/0014 ,  H04L2027/003 ,  H04L2027/0046 ,  H04L2027/0065

摘要： Provided is a method for estimating carrier wave or doppler frequency offset based on an approximated quadratic non-linear function in fine search, and a receiver employing the method. The method for estimating frequency offset includes the steps of: a) extracting more than three discrete samples in an order where the discrete samples are close to a maximum value of a power spectrum density function; b) inducing a quadratic non-linear function by using the extracted discrete samples; and c) estimating the frequency offset from a maximum point of the quadratic non-linear function. The technology of the present research makes it possible to exactly estimate frequency offset without increasing hardware complexity in estimation of carrier wave or doppler frequency offset.

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：US08699628B2

公开(公告)日：2014-04-15

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： H04L27/00

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：US08422604B2

公开(公告)日：2013-04-16

申请号：US12518103

申请日：2007-10-30

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

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

IPC分类号： H03D1/00

CPC分类号： H04L27/2656 ,  H04L7/042 ,  H04L27/2675

摘要： Provided is a method for detecting frame sync and frame structure in a satellite broadcasting system, which acquires an estimated value for detecting frame structure and frame sync and overcomes distortion of correlation analysis values by summing differential correlation values for SOF positions in consideration of the variable frame length, and selecting a maximum value in a channel environment with low signal-to-noise ratio and high frequency error. SOF is a sync word indicating the start point of a frame. The method includes the steps of: acquiring SOF differential correlation value sequences; acquiring sums (di,t) of the correlation values normalized for SOF positions based on the number of symbols per frame by using the above-generated SOF differential correlation value sequences; and selecting a maximum value (dz,x) among the sums of correlation values, detecting z as a frame sync position, and detecting x as a frame structure index.

摘要翻译： 提供了一种用于检测卫星广播系统中的帧同步和帧结构的方法，其获取用于检测帧结构和帧同步的估计值，并通过将SOF位置的差分相关值相加考虑到可变帧来克服相关分析值的失真 长度，并在低信噪比和高频误差的信道环境中选择最大值。 SOF是指示帧起始点的同步字。 该方法包括以下步骤：获取SOF差分相关值序列; 通过使用上述生成的SOF差分相关值序列，基于每帧的符号数，获取针对SOF位置归一化的相关值的和（di，t） 并且选择相关值之和中的最大值（dz，x），检测z作为帧同步位置，并且检测x作为帧结构索引。