公开(公告)号：KR101467342B1

公开(公告)日：2014-12-23

申请号：KR1020130124640

申请日：2013-10-18

Applicant: 성균관대학교산학협력단

Inventor： 채근홍 ,  윤석호

IPC: H04W16/14 ,  H04W72/00

CPC classification number: H04W16/14

Abstract: A cooperative cognitive radio system according to embodiments of the present invention may comprise: M cognitive radio communication devices (CR) which take a sample of baseband signals that was down converted from radio signals detected in an allocated band to a primary user (PU), in order to find out whether the primary user is currently using the allocated band, and generate spectrum sensing information (SSI) about whether PU signals are detected according to the sampling result; and a fusion center (FC) which determines a fusion threshold λ_FC that can maximize an expected average transmission throughput of a secondary user (SU) in a given communication environment including a maximum interference condition, if receiving the SSI from each of the M CRs, complies fusion test statistics using M sets of the SSI respectively received from the M CRs, and determines whether the PU signals exist by comparing the compiled fusion test statistics with the fusion threshold λ_FC that was given or determined by a predetermined rule of coefficients.

Abstract translation: 根据本发明的实施例的合作认知无线电系统可以包括：M个认知无线电通信设备（CR），其采集从分配频带中检测到的无线电信号向主用户（PU）下变频的基带信号的采样， 为了确定主用户是否正在使用分配的频带，并且根据采样结果生成是否检测到PU信号的频谱感测信息（SSI）; 以及融合中心（FC），其确定融合阈值λ_FC，如果从所述M个CR中的每一个接收到SSI，则确定可以使包括最大干扰条件的给定通信环境中的次要用户（SU）的预期平均传输吞吐量最大化的融合阈值λ_FC， 使用分别从M CR收到的M组的M组来进行融合测试统计，并且通过将编译的融合测试统计与由预定系数规则给出或确定的融合阈值λ_FC进行比较来确定PU信号是否存在。

公开(公告)号：KR1020140137147A

公开(公告)日：2014-12-02

申请号：KR1020130057662

申请日：2013-05-22

Applicant: 성균관대학교산학협력단

Inventor： 채근홍 ,  윤석호

IPC: G01S19/24 ,  G01S19/01

CPC classification number: G01S19/30

Abstract: 비모호 BOC 상관함수 생성 방법은 BOC 신호 수신수단이 BOC 신호를 수신하는 단계, 연산수단이 BOC 신호의 부반송파 펄스를 신호 구간이 펄스의 절반인 두 개의 구형펄스의 합으로 해석하여 BOC 신호의 부분상관함수를 구하는 단계, 연산수단이 부분상관함수를 조합하여 주변 첨두가 제거된 BOC 상관함수를 생성하는 단계 및 BOC 상관함수를 부분상관함수와 가중 결합하여 비모호 상관함수를 생성하는 단계를 포함한다.

Abstract translation: 一种用于产生明确BOC相关函数的方法包括以下步骤：通过BOC信号接收装置接收BOC信号; 通过将BOC信号的子载波脉冲解释为计算装置的信号范围为一半脉冲的两个球面脉冲的和来计算BOC信号的部分相关函数; 生成BOC相关函数，通过由计算装置组合部分相关函数来除去侧峰值; 并通过BOC相关函数与部分相关函数的加权组合产生明确的相关函数。

公开(公告)号：KR101467252B1

公开(公告)日：2014-12-01

申请号：KR1020130140685

申请日：2013-11-19

Applicant: 성균관대학교산학협력단

Inventor： 채근홍 ,  윤석호

IPC: H04L27/26

CPC classification number: H04L27/2646 ,  H04L27/2657 ,  H04L27/2659 ,  H04L27/2672 ,  H04L27/2675 ,  H04L27/2688

Abstract: The present invention relates to an orthogonal frequency division multiplexing (OFDM) demodulation technology and, more specifically, an OFDM integer frequency offset estimation technology. The OFDM signal with high frequency efficiency is widely used as physical layer standard technology for the standards of Wi-Fi and Long term evolution (LTE). The OFDM integer frequency offset estimation method of the present invention comprises a step of generating n number of binding sub carrier by transferring and overlapping frequency of g number of received sub carriers among n number of received sub carriers consisting of a received OFDM symbol.

Abstract translation: 本发明涉及正交频分复用（OFDM）解调技术，更具体地，涉及OFDM整数频偏估计技术。 具有高频率效率的OFDM信号被广泛用作Wi-Fi和长期演进（LTE）标准的物理层标准技术。 本发明的OFDM整数频偏估计方法包括通过在由接收的OFDM符号组成的n个接收到的子载波中传送和重叠g个接收到的子载波的频率来产生n个绑定子载波的步骤。

公开(公告)号：KR1020140082603A

公开(公告)日：2014-07-02

申请号：KR1020140056595

申请日：2014-05-12

Applicant: 성균관대학교산학협력단

Inventor： 채근홍 ,  이영포 ,  윤석호

IPC: H04L27/26

CPC classification number: H04L27/2657

Abstract: A method for estimating OFDM frequency offset based on a partial periodogram according to the present invention includes the steps of: (a) performing envelope equalized processing (EEP) as to an OFDM receiving signal; (b) estimating initial offset as to the EEP-processed receiving signal; and (c) estimating precise offset repetitively using the initial offset and the partial periodogram. Furthermore, the method may include the step of (d) estimating residual offset repetitively in order to estimate possible offset after the precise offset estimation. Through this, the method of the present invention can perform reliable frequency offset estimation as having low computation.

Abstract translation: 根据本发明的用于估计基于部分周期图的OFDM频偏的方法包括以下步骤：（a）对OFDM接收信号执行包络均衡处理（EEP）; （b）估计关于EEP处理的接收信号的初始偏移量; 和（c）使用初始偏移和部分周期图重复地估计精确偏移。 此外，该方法可以包括以下步骤：（d）重复地估计残余偏移量，以便在精确偏移估计之后估计可能的偏移。 通过这样，本发明的方法可以执行可靠的频偏估计，因为计算量低。

公开(公告)号：KR1020140073220A

公开(公告)日：2014-06-16

申请号：KR1020120141207

申请日：2012-12-06

Applicant: 성균관대학교산학협력단

Inventor： 이영포 ,  채근홍 ,  윤석호

IPC: H04B1/7183

CPC classification number: H04L25/0204 ,  H04L7/027 ,  H04L25/0212

Abstract: A method for estimating a communications channel in a UWB receiver according to one embodiment of the present invention comprises: (a) a step of performing a first correlation operation between a PN signal which is received in the UWB receiver and a local PN signal; (b) a step of performing a second correlation operation for a correlation function obtained from the first correlation operation using two sequential correlation windows; (c) a step of detecting whether a peak exists in correlation values obtained from the second correlation operation; (d) a step of repeating the (b) and (c) steps after increasing the sizes of the correlation windows for the second correlation operation if the peak is not detected; and (e) a step of estimating a kind of the communications channel by comparing the sizes of the correlation windows and cluster inter-arrival times if the peak is detected.

Abstract translation: 根据本发明的一个实施例的用于估计UWB接收机中的通信信道的方法包括：（a）在UWB接收机中接收的PN信号和本地PN信号之间执行第一相关操作的步骤; （b）使用两个顺序相关窗对从第一相关运算获得的相关函数进行第二相关运算的步骤; （c）检测从第二相关运算获得的相关值中是否存在峰值的步骤; （d）如果没有检测到峰值，则在增加用于第二相关运算的相关窗口的大小之后重复（b）和（c）步骤的步骤; 以及（e）如果检测到峰值，则通过比较相关窗口的大小和簇间到达时间来估计通信信道的种类的步骤。

公开(公告)号：KR101381104B1

公开(公告)日：2014-04-04

申请号：KR1020130057664

申请日：2013-05-22

Applicant: 성균관대학교산학협력단

Inventor： 채근홍 ,  윤석호

IPC: G01S19/01 ,  G01S5/14

CPC classification number: G06F17/15 ,  G01S19/24 ,  G01S19/30

Abstract: A method for generating a CBOC correlation function comprises: a step (501) in which a receiving means receives a CBOC(6,1,1/11) signal; a step (502) in which a calculating means analyzes a subcarrier pulse period of the CBOC(6,1,1/11) signal as the subcarrier pulse period of BOC_sin(6,1); a step (503) in which the calculating means combines partial correlation functions which form an autocorrelation function of the CBOC(6,1,1/11) to generate correlation functions; and a step (504) in which the calculating means combines the correlation functions based on weight to generate an unambiguous correlation function. [Reference numerals] (501) a receiving means receives a CBOC(6,1,1/11) signal; (502) a calculating means analyzes a subcarrier pulse period of the CBOC(6,1,1/11) signal as the subcarrier pulse period of BOC_sin(6,1); (503) the calculating means combines a partial correlation function which forms an autocorrelation function of the CBOC(6,1,1/11) to generate a correlation function; (504) the calculating means combines the correlation function based on weights to generate an unambiguous correlation function; (AA) Start; (BB) End

Abstract translation: 一种用于生成CBOC相关函数的方法包括：步骤（501），其中接收装置接收CBOC（6,1,1 / 11）信号; 步骤（502），其中计算装置分析CBOC（6,1,1 / 11）信号的子载波脉冲周期作为BOC_sin（6,1）的子载波脉冲周期; 步骤（503），其中所述计算装置组合形成所述CBOC（6,1,1 / 11）的自相关函数的部分相关函数以产生相关函数; 以及步骤（504），其中所述计算装置基于权重组合相关函数以生成明确的相关函数。 （501）接收装置接收CBOC（6,1,1 / 11）信号; （502）计算装置分析CBOC（6,1,1 / 11）信号的子载波脉冲周期作为BOC_sin（6,1）的子载波脉冲周期; （503），所述计算单元组合形成所述CBOC（6,1,1 / 11）的自相关函数的部分相关函数，以生成相关函数; （504）计算装置组合基于权重的相关函数以产生明确的相关函数; （AA）开始; （BB）结束

公开(公告)号：KR1020130136773A

公开(公告)日：2013-12-13

申请号：KR1020120060446

申请日：2012-06-05

Applicant: 성균관대학교산학협력단

Inventor： 윤석호 ,  채근홍

IPC: H04L27/26 ,  H04B7/14

CPC classification number: H04B7/026 ,  H04B7/0854 ,  H04B7/15592 ,  H04L1/0036 ,  H04L27/2691 ,  H04L2001/0097

Abstract: A data transmission/reception method in a cooperative communication system capable of improving degradation of performance in interfering environment by applying at least one of the MLSE (maximum likelihood sequence estimation) method and the MMSE (minimum mean square error) method is provided. A method for receiving data of destination node in a cooperative communication system can include a step for generating an estimation signal based on the MLSE method and the MMSE method, a step for generating bit error rate (BER) performance of the generated estimation signals, and a step for selecting one of the generated signals based on the MLSE method and the MMSE method, based on the generated BER performance. Thus, system performance can be improved by effectively improving degradation of a cooperative communication system due to interference even in an interference environment. [Reference numerals] (AA) System 1;(BB) System 2

Abstract translation: 提供了一种能够通过应用MLSE（最大似然序列估计）方法和MMSE（最小均方误差）方法中的至少一种来改善干扰环境中的性能劣化的协作通信系统中的数据发送/接收方法。 一种用于在协作通信系统中接收目的地节点的数据的方法可以包括基于MLSE方法和MMSE方法生成估计信号的步骤，用于产生所产生的估计信号的误码率（BER）性能的步骤，以及 基于所生成的BER性能，基于MLSE方法和MMSE方法来选择所生成的信号之一的步骤。 因此，即使在干扰环境下，由于干扰也能有效地改善协作通信系统的劣化，可以提高系统性能。 （附图标记）（AA）系统1;（BB）系统2