公开(公告)号：KR1020140046539A

公开(公告)日：2014-04-21

申请号：KR1020120110299

申请日：2012-10-04

Applicant: 목포대학교산학협력단

Inventor： 이성로 ,  이연우 ,  정민아 ,  전성민 ,  트란민탐 ,  왕진수 ,  김윤희 ,  박진배 ,  송익호

IPC: H04J11/00 ,  H04B7/14

CPC classification number: H04L25/0224 ,  H04B7/15535 ,  H04J11/00

Abstract: The present invention relates to a method of estimating a channel in a bidirectional relay system which operates in a frequency selective fading channel and provides a channel estimating technique which minimizes the distortion of a power amplifier and maximum to average power ratio by using training progression which satisfies an optimum condition. [Reference numerals] (AA,BB) Start; (CC) Generate a transmission signal by adding cyclic prefix after an S_1 communication node generates a training sequence X_1; (DD) Generate a transmission signal by adding cyclic prefix after an S_2 communication node generates a training sequence X_2; (EE) First step; (FF) Second step of simultaneously transmitting the transmission signal generated in the first step to a relay by the S_1 communication node and the S_2 communication node; (GG) Third step of receiving the signal of the second step by a relay node, removing the cyclic prefix, inserting the cyclic prefix into a reception signal y_r from which the cyclic prefix is removed, and transmitting the same to each source node S_1 and S_2; (HH) Estimate instantaneous channel response f_1 after receiving the signal of the third step by the S_1 communication node and removing the cyclic prefix; (II) Estimate instantaneous channel response f_2 after receiving the signal of the third step by the S_2 communication node and removing the cyclic prefix; (JJ) Fourth step; (KK,LL) End

Abstract translation: 本发明涉及一种估计在频率选择性衰落信道中操作的双向中继系统中的信道的方法，并且提供一种信道估计技术，其使功率放大器的失真和最大平均功率比通过使用满足 最佳条件。 （标号）（AA，BB）开始; （CC）在S_1通信节点生成训练序列X_1之后，通过添加循环前缀生成发送信号; （DD）在S_2通信节点生成训练序列X_2之后，通过添加循环前缀生成发送信号; （EE）第一步; （FF）通过S_1通信节点和S_2通信节点同时发送在第一步骤中生成的发送信号到中继的第二步骤; （GG）通过中继节点接收第二步骤的信号的第三步骤，去除循环前缀，将循环前缀插入到循环前缀被去除的接收信号y_r中，并将其发送到每个源节点S_1和 S_2; （HH）在S_1通信节点接收到第三步骤的信号后，估计瞬时信道响应f_1，并删除循环前缀; （II）估计S_2通信节点接收到第三步信号后的瞬时信道响应f_2，去除循环前缀; （JJ）第四步; （KK，LL）结束

公开(公告)号：KR1020130046668A

公开(公告)日：2013-05-08

申请号：KR1020110111192

申请日：2011-10-28

Applicant: 목포대학교산학협력단

Inventor： 정민아 ,  이연우 ,  송익호 ,  백지현 ,  윤석호 ,  박진관 ,  박선 ,  양후열 ,  문병대 ,  이성로

IPC: H04L27/26

CPC classification number: H04L27/2657

Abstract: PURPOSE: An OFDM[Orthogonal Frequency Division Multiplexing] frequency offset estimating method based on the combination of continuous correlation values is provided to obtain a correlation value which is nearly constant regardless of a time error value. CONSTITUTION: The components of a differentially combined result are added. A time error which maximizes the added value of components is calculated. The added value of the components is calculated in a state where the time error is nonexistent. [Reference numerals] (AA) Normalized correlation value; (BB) Time error(τ)

Abstract translation: 目的：提供基于连续相关值组合的OFDM [正交频分复用]频偏估计方法，以获得几乎恒定的相关值，而不管时间误差值如何。 构成：添加了差分组合结果的组件。 计算最大化组件附加值的时间误差。 在时间误差不存在的状态下计算组件的附加值。 （附图标记）（AA）归一化相关值; （BB）时间误差（τ）

公开(公告)号：KR1020130046667A

公开(公告)日：2013-05-08

申请号：KR1020110111191

申请日：2011-10-28

Applicant: 목포대학교산학협력단

Inventor： 이성로 ,  박종인 ,  윤석호 ,  이정훈 ,  최명수 ,  송익호 ,  이연우 ,  모귀환 ,  박인수 ,  양후열

IPC: G01S19/14 ,  G01S19/39

Abstract: PURPOSE: A synchronization improvement method of a marine telematics Galileo satellite system is provided to solve a plurality of peak problems of AltBOC(alternative binary offset carrier) signals and CBOC(composite BOC) signals. CONSTITUTION: A unit pulse signal S0alt, S2alt, ···,S2k-1alt is defined to indicate an AltBOC(kn, n) signal subcarrier in a half period. A correlation function of the defined unit pulse signal and AltBOC(1.5n, n) signals are indicated as R0alt, R2alt, ···,R2k-1alt and by reuniting a sum total of the correlation functions according to an equation, the correlating function removing a peripheral peak. [Reference numerals] (AA) AltBOC subcarrier; (BB) Pseudo noise code chip time; (CC,DD,EE,FF) Time

Abstract translation: 目的：提供海洋远程信息伽利略卫星系统的同步改进方法，以解决AltBOC（替代二进制偏移载波）信号和CBOC（复合BOC）信号的多个峰值问题。 规定：单位脉冲信号S0alt，S2alt，...，S2k-1alt定义为在半周期内表示AltBOC（kn，n）信号副载波。 定义的单位脉冲信号和AltBOC（1.5n，n）信号的相关函数表示为R0alt，R2alt，...，R2k-1alt，并且通过根据等式重新统计相关函数的总和，相关函数 去除外围峰。 （附图标记）（AA）AltBOC副载波; （BB）伪噪声码芯片时间; （CC，DD，EE，FF）时间

公开(公告)号：KR1020130021972A

公开(公告)日：2013-03-06

申请号：KR1020110084579

申请日：2011-08-24

Applicant: 목포대학교산학협력단

Inventor： 정민아 ,  나영화 ,  송익호 ,  임병수 ,  정지원 ,  박선 ,  이성로

IPC: H04B7/04

CPC classification number: H04B7/0413 ,  H03M13/1102 ,  H03M13/1125

Abstract: PURPOSE: A log-likelihood ratio(LLR) estimation method in a multi-input multi-output(MIMO) channel is provided to separate a soft-decision bit without performance degradation by using a candidate vector. CONSTITUTION: A mapping point is selected as a candidate vector. The mapping point is located within a predetermined range based on I-ch and Q-ch values of receiving signals among mapping points estimated in a receiving end. Log-likelihood computation is performed by using the selected candidate vector. The log-likelihood computation is performed by reflecting the number of transmitting antennas, the number of receiving antennas, and a modulation method for dividing the receiving signals into data of the number of transmitting antennas. [Reference numerals] (AA) Selected four candidate vectors with the same sign as that of a receiving signal; (BB) Receiving signal

Abstract translation: 目的：提供多输入多输出（MIMO）信道中的对数似然比（LLR）估计方法，以通过使用候选向量来分离软判决比特而不降低性能。 构成：选择一个映射点作为候选向量。 基于在接收端估计的映射点之间的接收信号的I-ch和Q-ch值，映射点位于预定范围内。 通过使用选择的候选向量来执行对数似然计算。 通过将发送天线的数量，接收天线的数量和用于将接收信号分割为发送天线数的数据的调制方法进行对数似然计算。 （附图标记）（AA）选择与接收信号具有相同符号的四个候选向量; （BB）接收信号

公开(公告)号：KR101093152B1

公开(公告)日：2011-12-12

申请号：KR1020100091900

申请日：2010-09-17

Applicant: 목포대학교산학협력단

Inventor： 송익호 ,  강현구 ,  김동진 ,  정민아 ,  이성로

IPC: H04B7/08

CPC classification number: H04B7/0817 ,  H04B7/0845

Abstract: PURPOSE: A frequency detection method for recognition wireless communication is provided to stably perform frequency detection even though a noise environment is changed. CONSTITUTION: The output of a detector is obtained from a receiving antenna. A frequency is detected by combining the obtained L detector output. If the frequency detection method is a PRO(i1-iM), the detection probability of PRO(i,k) is obtained through a predetermined equation.

Abstract translation: 目的：提供用于识别无线通信的频率检测方法，以便即使改变噪声环境来稳定地执行频率检测。 构成：从接收天线获得检测器的输出。 通过组合获得的L检测器输出来检测频率。 如果频率检测方法是PRO（i1-iM），则通过预定方程获得PRO（i，k）的检测概率。