公开(公告)号：KR1020130106197A

公开(公告)日：2013-09-27

申请号：KR1020120027908

申请日：2012-03-19

Applicant: 한국전자통신연구원

Inventor： 정길수 ,  김대호

IPC: H04J11/00 ,  H04B7/26

CPC classification number: H04W72/02 ,  H04L5/0014 ,  H04L27/0006

Abstract: PURPOSE: A wireless data transmission device and a method thereof are provided to solve the shortage problem of frequency resources and to reduce adjacent channel power ratio (ACPR) and peak-to-average power ratio (PAPR). CONSTITUTION: A sensing part detects available unused resources from the utilized band of an operation frequency band based on spectrum sensing technology (S211). A control part selects a channel or a frequency band for wireless data transmission based on the detected available unused resources (S230), and determines whether the initiation of communications is possible through the selected channel (S240). If the initiation of communications is possible, a transmission part transmits data through the channel (S250). [Reference numerals] (AA) Start; (BB) No; (CC,DD) Yes; (EE) End; (S210) Has transmission data occurred ?; (S211) Identify the usage status of an operation frequency band; (S220) Obtain control information; (S230) Select a wireless channel; (S240) Can a communication process be started ?; (S250) Start an access / a communication process

Abstract translation: 目的：提供一种无线数据传输设备及其方法，以解决频率资源短缺问题，降低相邻信道功率比（ACPR）和峰均功率比（PAPR）。 构成：基于频谱感测技术，感测部分从运行频带利用频带中检测出未使用的资源（S211）。 控制部分基于检测到的可用的未使用资源来选择用于无线数据传输的信道或频带（S230），并且通过所选择的信道来确定通信的启动是否可行（S240）。 如果可以进行通信的发起，则发送部通过信道发送数据（S250）。 （附图标记）（AA）开始; （BB）否 （CC，DD）是; （EE）结束; （S210）是否发送数据？ （S211）识别操作频带的使用状态; （S220）获取控制信息; （S230）选择无线频道; （S240）通信过程是否可以开始？ （S250）启动访问/通信进程

公开(公告)号：KR1020130085493A

公开(公告)日：2013-07-30

申请号：KR1020110132317

申请日：2011-12-09

Applicant: 한국전자통신연구원

Inventor： 박옥선 ,  박기윤 ,  정길수 ,  김대호

IPC: H04B7/212 ,  H04L12/70 ,  H04W74/08

CPC classification number: H04L27/2602 ,  H04B7/212 ,  H04L27/2626

Abstract: PURPOSE: A method for controlling data transmission based on the detection of carrier waves and a device for the same are provided to cost-effectively recover data transmission from packet collision caused by competitions during a data transmission operation. CONSTITUTION: The attribute information of a carrier wave signal in a data transmission channel is received (S100). When the input attribute information of the carrier wave signal and the data transmission channel are occupied, the data transmission of the data transmission channel is determined using either a carrier wave re-detection repeating variable or a carrier wave detecting trial repeating variable (S200). The carrier wave re-detection repeating variable is a variable for detecting carrier waves. The carrier wave detecting trial repeating variable is a variable for detecting carrier waves unless the channel is occupied. [Reference numerals] (AA) Start; (BB) End; (S100) Input a carrier wave signal; (S200) Determine whether to transmit data; (S300) Transmit data

Abstract translation: 目的：提供一种基于载波检测来控制数据传输的方法及其设备，以便在数据传输操作期间以成本有效的方式从数据包冲突引起的数据包冲突中恢复数据传输。 构成：接收数据传输通道中的载波信号的属性信息（S100）。 当载波信号和数据传输通道的输入属性信息被占用时，使用载波检测重复变量或载波检测试用重复变量确定数据传输通道的数据传输（S200）。 载波重新检测重复变量是用于检测载波的变量。 载波检测试验重复变量是用于检测载波的变量，除非信道被占用。 （附图标记）（AA）开始; （BB）结束; （S100）输入载波信号; （S200）确定是否发送数据; （S300）发送数据

公开(公告)号：KR1020120071250A

公开(公告)日：2012-07-02

申请号：KR1020100132916

申请日：2010-12-22

Applicant: 한국전자통신연구원

Inventor： 정길수 ,  황현구 ,  김대호

IPC: H04L27/26 ,  H04B1/06

CPC classification number: H04L27/265

Abstract: PURPOSE: A method and apparatus for channel estimation in a mobile communication system are provided to enhance the accuracy of channel estimation by additionally performing channel estimation in a time domain to eliminate the influence of ICI(Inter-Carrier Interference). CONSTITUTION: A CP(Cyclic Prefix) remover(110) eliminates a CP from a reference signal. A FFT(Fast Fourier Transformer)(120) performs the fast Fourier transformation of the reference signal from which the CP is removed. An LS(Least Square) channel estimator(230) measures a Doppler shift value. The LS channel estimator performs channel estimation for a frequency domain. An IDFT(Inverse Discrete Fourier Transformer)(140) outputs a channel impulse response through the inverse discrete Fourier transformation of a channel frequency domain. An adaptive filter(320) performs the channel estimation of a time domain by filtering the reference signal from which the CP is removed. A DFT(Discrete Fourier Transformer)(330) changes the outputs of the adaptive filter into the value of the frequency domain.

Abstract translation: 目的：提供一种在移动通信系统中进行信道估计的方法和装置，通过在时域中额外执行信道估计来消除ICI（载波间干扰）的影响，提高信道估计的准确性。 构成：CP（循环前缀）去除器（110）从参考信号中消除了CP。 FFT（快速傅里叶变换器）（120）执行从其移除CP的参考信号的快速傅里叶变换。 LS（最小二乘）信道估计器（230）测量多普勒频移值。 LS信道估计器对频域进行信道估计。 IDFT（逆离散傅立叶变换器）（140）通过信道频域的离散傅里叶逆变换输出信道脉冲响应。 自适应滤波器（320）通过对从其移除CP的参考信号进行滤波来执行时域的信道估计。 DFT（离散傅里叶变换器）（330）将自适应滤波器的输出改变为频域的值。