公开(公告)号：KR101294536B1

公开(公告)日：2013-08-07

申请号：KR1020110112243

申请日：2011-10-31

Applicant: 세종대학교산학협력단

Inventor： 송형규 ,  안장균 ,  임형묵

IPC: H04B7/02 ,  H04B7/14 ,  H04L27/26

Abstract: 본 발명은 OFDMA 방식에서의 협력 통신 방법 및 장치에 관한 것이다. 본 발명에 따르면, 제1 서브채널을 갖는 제1 단말이 제2 서브채널을 갖는 제2 단말 및 기지국과 협력 통신을 수행하는 OFDMA 방식에서의 협력 통신 방법에 있어서, 상기 제1 단말이 자신의 전송 신호를 상기 제1 서브채널을 통해 상기 기지국 및 상기 제2 단말로 전송하는 동시에, 이전 전송 시간에 상기 제2 단말로부터 상기 제2 서브채널을 통해 수신된 신호를 상기 제2 서브채널을 통해 상기 기지국으로 브로드캐스팅하는 OFDMA 방식에서의 협력 통신 방법 및 장치를 제공한다.
상기 OFDMA 방식에서의 협력 통신 방법 및 장치에 따르면, OFDMA의 상향링크에서 단일 안테나를 사용하는 단말기들 사이에 추가적인 안테나의 증가 없이도 다이버시티 이득을 위해 협력 통신을 하면서 데이터를 전송함에 따라 전송률을 향상시킬 수 있고 신뢰성 있는 통신이 가능하게 하는 이점이 있다.

公开(公告)号：KR101350587B1

公开(公告)日：2014-02-06

申请号：KR1020120137722

申请日：2012-11-30

Applicant: 세종대학교산학협력단

Inventor： 송형규 ,  안장균

IPC: H04B7/04 ,  H04L27/26

CPC classification number: H04L27/2647 ,  H04B7/0413

Abstract: The present invention relates to a method for detecting signals using a condition number based on a MIMO-OFDM system and a device thereof. A method for detecting signals using a condition number based on a MIMO-OFDM system according to the present invention includes: a step of receiving signals with a MIMO-OFDM method from a transmission terminal which has a plurality of transmission antennae; a step of calculating a condition number for each received symbol; a step of comparing the condition number with the threshold value; and a step of detecting signals with a first algorithm as a detection method for received symbols of which condition number is smaller than the threshold value with reference to the compared result and detecting signals with a second algorithm as a detection method for the received symbols of which condition number is the same or greater than the threshold value. According to the present invention, in a MIMO-OFDM system, the complexity in a process of detection can be reduced compared to an existing detection method and the detection error can also be remarkably reduced by selecting a detection method as a V algorithm detection method using CLLL and a QRD-M detection method using DFE according to the channel condition number. [Reference numerals] (AA) Start; (BB) End; (S210) Receiving a signal in a MIMO-OFDM method from a transmission terminal; (S220) Calculating a condition number for the received symbol; (S230) Setting up the threshold value; (S240) Condition number of the received symbol

Abstract translation: 本发明涉及使用基于MIMO-OFDM系统的条件号及其装置来检测信号的方法。 根据本发明的使用基于MIMO-OFDM系统的条件号来检测信号的方法包括：从具有多个发送天线的发送终端接收MIMO-OFDM方式的信号的步骤; 计算每个接收到的符号的条件数的步骤; 将条件数与阈值进行比较的步骤; 以及参照比较结果，利用第一算法检测信号作为检测方法的检测方法，其中条件数小于阈值的接收符号，并且使用第二算法的检测信号作为其接收符号的检测方法 条件号与阈值相同或更大。 根据本发明，在MIMO-OFDM系统中，与现有的检测方法相比，可以降低检测过程的复杂性，通过选择检测方法作为V算法检测方法，也可以显着降低检测误差 CLLL和使用DFE的QRD-M检测方法根据信道条件数。 （附图标记）（AA）开始; （BB）结束; （S210）从发送终端接收MIMO-OFDM方式的信号; （S220）计算接收到的符号的条件号; （S230）设定阈值; （S240）接收符号的条件号<阈值; （S250）使用CLLL通过V算法检测信号; （S260）使用DFE通过QRD-M检测信号

公开(公告)号：KR1020130047306A

公开(公告)日：2013-05-08

申请号：KR1020110112243

申请日：2011-10-31

Applicant: 세종대학교산학협력단

Inventor： 송형규 ,  안장균 ,  임형묵

IPC: H04B7/02 ,  H04B7/14 ,  H04L27/26

CPC classification number: H04B7/026 ,  H04B7/15592 ,  H04L5/0007

Abstract: PURPOSE: A cooperative communication method and a device thereof are provided to improve transmission rates by executing cooperative communication for a diversity gain without increasing the number of additional antennas. CONSTITUTION: A first terminal(110) transmits a transmission signal to a base station(130) and a second terminal(120) through a first sub-channel. The first terminal broadcasts a signal received from the second terminal through a second sub-channel to the base station through the second-sub channel. The first terminal transmits a first transmission signal through the first sub-channel in first transmission time. The second terminal transmits a second transmission signal through the first sub-channel in second transmission time. The first terminal broadcasts a first-a transmission signal received through the second sub-channel in the first transmission time through the second sub-channel.

Abstract translation: 目的：提供协作通信方法及其装置，以通过在不增加附加天线的数量的情况下通过执行分集增益的协作通信来提高传输速率。 构成：第一终端（110）通过第一子信道向基站（130）和第二终端（120）发送传输信号。 第一终端通过第二子信道将从第二终端接收的信号通过第二子信道广播到基站。 第一终端在第一传输时间内通过第一子信道发送第一传输信号。 第二终端在第二传输时间内通过第一子信道发送第二传输信号。 第一终端通过第二子信道在第一传输时间中广播通过第二子信道接收的第一传输信号。