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公开(公告)号：KR1020140104315A
公开(公告)日：2014-08-28
申请号：KR1020130042966
申请日：2013-04-18
Applicant: 숭실대학교산학협력단
IPC: H04J11/00
CPC classification number: H04L27/2623 , H04L27/2628
Abstract: 본발명은첨두대평균전력비감소를위한 OFDM 통신시스템및 그방법에관한것이다. 본발명의 OFDM 통신시스템은수신장치로전송할데이터신호들에대해역고속푸리에변환을하고, 역고속푸리에변환된신호들에대해설정된임계진폭값으로클리핑을한다. 그후 클리핑된신호들과클리핑이전신호를비교하여산출된값으로둘 이상의부반송파들에대한크기를결정하고, 데이터신호를크기가결정된둘 이상의부반송파들을이용하여수신장치로전송한다. 이러한, 본발명에따르면클리핑잡음을이용하여서로다른부반송파각각에대응하는임계치를산출하고, 산출한임계치를기초로부반송파들의크기를각각제한함으로써, 종래클리핑시에주사용자에게발생하였던클리핑잡음에대한간섭을최소화하면서도첨두대평균전력비(PAPR) 증가를효율적으로감소시킬수 있는효과를기대할수 있다.
Abstract translation: 本发明涉及用于降低峰均功率比（PAPR）的OFDM通信系统及其方法。 本发明中给出的OFDM通信系统对要发送到接收机设备的数据信号进行快速傅立叶反变换，并以设定的阈值振幅值对逆快速傅立叶变换信号进行削波。 然后，通过使用通过比较限幅信号和削波之前的信号而计算的值来确定两个或更多个子载波的大小，并且通过使用确定尺寸的子载波将数据信号发送到接收机装置。 根据上述本发明，使用限幅噪声来计算与各副载波对应的阈值，并根据计算出的阈值来限制副载波的大小。 通过这样做，可以最小化用于影响现有削波技术中的主用户的削波噪声的干扰，并且可以有效地降低PAPR的增加。
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公开(公告)号：KR1020140103797A
公开(公告)日：2014-08-27
申请号：KR1020130053056
申请日：2013-05-10
Applicant: 숭실대학교산학협력단
IPC: H04B7/02
CPC classification number: H04B7/026 , H04W72/082 , H04W72/085
Abstract: The present invention relates to an apparatus and a method to select a relay for cooperative communication using Q-learning. According to the present invention, the relay selection method for the cooperative communication comprises the steps of: enabling all relays to participate in the cooperative communication and defining an index group of the relays; initializing a Q-table and randomly selecting an initialization condition; and selecting the number of the cooperative relays in all the relay selection periods; selecting one action from all the available actions in a current condition; moving to the following condition using the selected action; selecting the action including the maximum value of the center Q value based on all the available actions; selecting the number of the cooperative relays including the maximum Q value in the Q-table and updating the Q value; and selecting the following condition as the current condition. According to the present invention, a condition for the Q-learning in a physical layer point clearly defines the action and compensation value, and phases the entire algorithm. A propose method using the Q-learning effectively reduces the complexity of the system and makes a similar symbol error rate (SER) performance when the propose method is compared with the relay selection method through a mathematical analysis. In addition, a Q-learning algorithm is effectively used to improve the performance of a new-generation wireless communication system.
Abstract translation: 本发明涉及使用Q学习来选择用于协作通信的中继的装置和方法。 根据本发明，用于协作通信的中继选择方法包括以下步骤：使所有中继站能够参与协作通信并定义中继站的索引组; 初始化Q表并随机选择初始化条件; 以及在所有继电器选择周期中选择合作继电器的数量; 从当前条件下的所有可用动作中选择一个动作; 使用所选动作移动到以下条件; 基于所有可用的动作来选择包括中心Q值的最大值的动作; 选择包括Q表中最大Q值的协同中继的数量，并更新Q值; 并选择以下条件作为当前条件。 根据本发明，用于物理层点的Q学习的条件清楚地定义了动作和补偿值，并对整个算法进行了相位。 当通过数学分析将提出的方法与中继选择方法进行比较时，使用Q学习的提出方法有效地降低了系统的复杂性并产生了类似的符号错误率（SER）性能。 此外，Q学习算法有效地用于提高新一代无线通信系统的性能。
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Patent Agency Ranking
公开(公告)号：KR1020130067081A
公开(公告)日：2013-06-21
申请号：KR1020110133924
申请日：2011-12-13
Applicant: 숭실대학교산학협력단
CPC classification number: H04W72/082 , H04W4/70 , H04W64/00 , H04W72/0453 , H04W88/18
Abstract: PURPOSE: A frequency interference management device using wireless positioning is provided to find a position between devices by using the wireless positioning in M2M(Machine-To-Machine) communication environment, thereby assigning frequencies by using the wireless positioning. CONSTITUTION: An information management unit collects and manages information for M2M communication environment of assigning frequencies(S410). A position measurement unit measures each position of a plurality of devices by using a wireless signal based on the collected information(S420). A frequency assignment unit assigns frequencies to each device based on the each position(S430). An information providing unit provides position information and frequency information to a management server which manages the M2M communication environment(S440). [Reference numerals] (AA) Start; (BB) End; (S410) Collect and manage information about communication environment; (S420) Measure the position of each device based on the collected information; (S430) Assign frequencies based on the each position; (S440) Provide position information and frequency information to a management server
Abstract translation: 目的：提供使用无线定位的频率干扰管理装置，通过使用M2M（机器对机器）通信环境中的无线定位来找到设备之间的位置，从而通过使用无线定位来分配频率。 规定：信息管理单元收集和管理分配频率的M2M通信环境的信息（S410）。 位置测量单元基于收集的信息通过使用无线信号来测量多个设备的每个位置（S420）。 频率分配单元基于每个位置向每个设备分配频率（S430）。 信息提供单元向管理M2M通信环境的管理服务器提供位置信息和频率信息（S440）。 （附图标记）（AA）开始; （BB）结束; （S410）收集和管理有关通信环境的信息; （S420）根据收集到的信息测量各设备的位置; （S430）根据每个位置分配频率; （S440）向管理服务器提供位置信息和频率信息
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公开(公告)号：KR101096801B1
公开(公告)日：2011-12-21
申请号：KR1020090027523
申请日：2009-03-31
Applicant: 한국전자통신연구원 , 숭실대학교산학협력단
Abstract: 본 발명은 이동통신 시스템에 관한 것으로, 보다 상세하게는 이동통신 시스템의 기지국에서 무선자원 할당을 위한 스케줄링(Scheduling) 방법에 관한 것으로, 상기 방법은 사용자 단말을 타겟으로 하는 패킷을 전송받아 사용자별 전송대기 큐에 저장하는 단계와; 사용자별 전송대기 큐의 패킷 유입량에 의한 패킷누적량과 채널영향에 의한 사용자별 평균 전송률을 산출하여 이를 무선자원 할당을 위한 우선순위함수식에 반영하여 얻어진 값들에 기초하여 무선자원 할당하는 단계;를 포함함을 특징으로 한다. 이로써 본 발명은 무선 채널 상황 뿐만 아니라 각 사용자별 단위시간당 패킷 유입량을 고려하여 이에 비례하게 무선 자원 할당함으로써, 높은 시스템 전송률과 사용자의 트래픽에 대한 비례 공평성(Proportional Fairness)을 함게 제공할 수 있다.
무선자원, 할당, 패킷 유입량.-
公开(公告)号：KR1020110098117A
公开(公告)日：2011-09-01
申请号：KR1020100017571
申请日：2010-02-26
Applicant: 숭실대학교산학협력단
IPC: G01S1/20
Abstract: 본 발명은 입자 군집 최적화를 이용한 무선측위 방법에 관한 것으로, 거리측정과 무선측정 방법에 입자 군집 최적화(Particle Swarm Optimization)를 접목하여 무선측위 정밀도를 향상시키는 입자 군집 최적화를 이용한 무선측위 방법에 관한 것이다. TDoA 무선측위로부터 파라미터를 추정하는 제10단계(S10)와, 상기 TDoA 무선측위로부터 얻어진 TDoA 파라미터를 재추정하는 제20단계(S20)와, 상기 재추정된 TDoA 파라미터를 이용하여 태그 위치를 재측정하는 제30단계(S30)를 포함한다. 따라서, 본 발명은 UWB(Ultra Wide Band) 시스템에서 TDoA 파라미터 재추정과 태그(Tag) 위치 재측정을 수행하는 두 과정을 통한 입자 군집 최적화(PSO)를 사용하여 무선측위 정밀도를 향상시키는 효과가 있다.
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公开(公告)号：KR1020100067010A
公开(公告)日：2010-06-18
申请号：KR1020090027523
申请日：2009-03-31
Applicant: 한국전자통신연구원 , 숭실대학교산학협력단
CPC classification number: H04W72/0486 , H04B7/0413 , H04W72/1221 , H04W72/1252
Abstract: PURPOSE: A scheduling method for offering a proportional fairness toward the traffic of a user for a mobile communications system is provided to implement high system transmission rate by allocating wireless resources. CONSTITUTION: A transmission standby queue(101) receives a packet for a UEs(User Equipments). The latency queue temporarily stores the received packets according to each user. A packet scheduler(100) receives wireless CQI(Channel Quality Information) which is necessary for the radio resource assignment from user terminals. The packet scheduler receives the packet inflow information per the unit time from the latency queue. The packet scheduler assigns radio resources to user terminals.
Abstract translation: 目的：提供一种用于为移动通信系统的用户的流量提供比例公平的调度方法，以通过分配无线资源来实现高系统传输速率。 构成：传输备用队列（101）接收用于UE（用户设备）的分组。 延迟队列根据每个用户临时存储接收到的数据包。 分组调度器（100）从用户终端接收无线资源分配所需的无线CQI（信道质量信息）。 分组调度器从延迟队列接收每单位时间的分组流入信息。 分组调度器向用户终端分配无线电资源。
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公开(公告)号：KR1020090109052A
公开(公告)日：2009-10-19
申请号：KR1020090013464
申请日：2009-02-18
Applicant: 숭실대학교산학협력단
CPC classification number: H04B7/0413 , H04B7/0617 , H04L25/0202 , H04L27/2627
Abstract: PURPOSE: A beam forming method and an apparatus for the preexistence of a license user and a recognition radio user are provided to transmit information to the recognition radio receiver without interference on the user. CONSTITUTION: A beam forming method and an apparatus for the preexistence of a license user and a recognition radio user are as follows. A coding method is coded in a coding method by inputting user data bit and a control data bit(S10). The coded output signal is inputted at a recognition radio weighted decision after modulating the signal into a modulation system(S20). Channel information received to a license user receiver is estimated in the license user channel estimator(S30). The channel information presumed from the license user channel estimator of the license user receiver is transmitted to the license user transmitting terminal(S40). The information transmitted to the license user transmitting terminal is transmitted by the recognition radio weighted decision through the core network(S60).
Abstract translation: 目的：提供一种用于许可证用户和识别无线电用户的预先存在的波束形成方法和装置，用于在不干扰用户的情况下向识别无线电接收机发送信息。 构成：用于许可证用户和识别无线电用户的预先存在的波束形成方法和装置如下。 编码方法通过输入用户数据位和控制数据位在编码方法中编码（S10）。 编码输出信号在将信号调制成调制系统之后以识别无线电加权决定输入（S20）。 在许可证用户信道估计器中估计接收到许可用户接收者的信道信息（S30）。 从许可用户接收机的许可用户信道估计器推定的信道信息被发送给许可证用户发送终端（S40）。 发送到许可用户发送终端的信息通过核心网络通过识别无线电加权决定来发送（S60）。
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