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Patent Agency Ranking
公开(公告)号：KR100790366B1
公开(公告)日：2008-01-03
申请号：KR1020060112379
申请日：2006-11-14
Applicant: 한국전자통신연구원 , 한양대학교 산학협력단
CPC classification number: H04B7/0857 , H04L25/0204 , H04L25/0248 , H04L25/0256 , H04L25/03242 , H04L2025/03426 , H04L2025/03624 , H04B7/0854
Abstract: A detection apparatus in a MIMO(Multi Input Multi Output) system and a method thereof are provided to reduce the volume of operations for decoding Rx signals of a receiving block while maintaining a desired system performance and to obtain a BER(Bit Error Rate) performance similar to an SD(Sphere Decoding) detection method. A detection apparatus in a MIMO system comprises the first detection unit(11), a candidate element determination unit(12), an Rx signal cancellation unit(13), and the second detection unit(14). The first detection unit(11) decodes an Rx signal. The candidate element determination unit(12) calculates an instantaneous SINR value for each of the elements of the decoded vector, compares each calculated instantaneous SINR value with a threshold, and determines elements to directly estimate Tx data from the decoded vector. The Rx signal cancellation unit(13) creates a signal for the determined elements, cancels the created signal from the initial Rx signal, and outputs a modified Rx signal. The second detection unit(14) receives the modified Rx signal from the Rx signal cancellation unit(13) and decodes it using a more delicate detecting method than the first detection unit(11).
Abstract translation: 提供了一种MIMO（多输入多输出）系统中的检测装置及其方法，用于减少用于解码接收块的Rx信号的操作量，同时保持期望的系统性能并获得BER（误码率）性能 类似于SD（球体解码）检测方法。 MIMO系统中的检测装置包括第一检测单元（11），候选元素确定单元（12），Rx信号消除单元（13）和第二检测单元（14）。 第一检测单元（11）对Rx信号进行解码。 候选元素确定单元（12）计算解码矢量的每个元素的瞬时SINR值，将每个计算的瞬时SINR值与阈值进行比较，并且确定从解码矢量直接估计Tx数据的元素。 Rx信号消除单元（13）产生用于所确定的元件的信号，从初始Rx信号中消除所产生的信号，并输出经修改的Rx信号。 第二检测单元（14）从Rx信号消除单元（13）接收修改的Rx信号，并且使用比第一检测单元（11）更精确的检测方法对其进行解码。
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公开(公告)号：KR100435790B1
公开(公告)日：2004-06-10
申请号：KR1020010054710
申请日：2001-09-06
Applicant: 한국전자통신연구원
IPC: H04B7/216
Abstract: PURPOSE: An adaptive code bank managing method for allocating code channels in a mobile communication system and an apparatus therefor are provided to calculate the maximum number of allocable code channels according to wireless channel environments, and to adaptively vary the code bank by the size of communication traffic, so as to improve efficiency in communication channel use. CONSTITUTION: If a request for using code channels is generated, a channel number adjustor of a code bank management unit calculates the number of necessary code channels(S100,S110). The channel number adjustor calculates a link gain between a mobile station and a base station, on the basis of power amount allocated to all currently used code channels, total noise and interference amount, and SIR(Signal-to-Interference Rate)(S120,S130). The channel number adjustor calculates the number of additionally allocable code channels(S140). The channel number adjustor calculates the size of a code bank(S150). A channel allocator compares the number of necessary codes with the number of available channel codes(S160). If the number of necessary codes is larger, the channel allocator declares the failure of code channel allocation(S170). And if the number of necessary codes is smaller, the channel allocator allocates code channels(S180).
Abstract translation: 目的：提供一种用于在移动通信系统中分配代码信道的自适应代码组管理方法及其装置，用于根据无线信道环境计算可分配代码信道的最大数量，并且通过通信的大小自适应地改变代码组 流量，从而提高沟通渠道使用效率。 构成：如果产生使用代码信道的请求，则代码库管理单元的信道号码调整器计算必要代码信道的数量（S100，S110）。 信道号调整器根据分配给所有当前使用的码信道的功率量，总噪声和干扰量以及SIR（信号干扰比）来计算移动台和基站之间的链路增益（S120， S130）。 频道号码调整器计算可额外分配的代码频道的数量（S140）。 频道号码调整器计算码组的大小（S150）。 信道分配器将必要的码数与可用信道码的数量进行比较（S160）。 如果所需代码的数量较大，则信道分配器声明代码信道分配失败（S170）。 并且如果所需代码的数量较少，则信道分配器分配代码信道（S180）。
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公开(公告)号：KR1020030021434A
公开(公告)日：2003-03-15
申请号：KR1020010054710
申请日：2001-09-06
Applicant: 한국전자통신연구원
IPC: H04B7/216
CPC classification number: H04W72/082 , H04B7/216 , H04W16/04 , H04W72/0446
Abstract: PURPOSE: An adaptive code bank managing method for allocating code channels in a mobile communication system and an apparatus therefor are provided to calculate the maximum number of allocable code channels according to wireless channel environments, and to adaptively vary the code bank by the size of communication traffic, so as to improve efficiency in communication channel use. CONSTITUTION: If a request for using code channels is generated, a channel number adjustor of a code bank management unit calculates the number of necessary code channels(S100,S110). The channel number adjustor calculates a link gain between a mobile station and a base station, on the basis of power amount allocated to all currently used code channels, total noise and interference amount, and SIR(Signal-to-Interference Rate)(S120,S130). The channel number adjustor calculates the number of additionally allocable code channels(S140). The channel number adjustor calculates the size of a code bank(S150). A channel allocator compares the number of necessary codes with the number of available channel codes(S160). If the number of necessary codes is larger, the channel allocator declares the failure of code channel allocation(S170). And if the number of necessary codes is smaller, the channel allocator allocates code channels(S180).
Abstract translation: 目的：提供一种用于在移动通信系统中分配代码信道的自适应代码库管理方法及其装置，用于根据无线信道环境计算可分配代码信道的最大数量，并根据通信的大小自适应地改变代码库 流量，从而提高通信渠道使用效率。 构成：如果生成了使用代码通道的请求，则代码库管理单元的通道号调整器计算必要代码通道的数量（S100，S110）。 信道号调整器基于分配给所有当前使用的码信道的功率量，总噪声和干扰量以及SIR（信号对干扰率）来计算移动台和基站之间的链路增益（S120， S130）。 信道编号调整器计算附加可分配的码信道的数量（S140）。 通道编号调节器计算代码库的大小（S150）。 信道分配器将必要代码的数量与可用信道码的数量进行比较（S160）。 如果需要的代码数量较多，则通道分配器声明代码通道分配失败（S170）。 并且，如果必要代码的数量较少，则信道分配器分配代码信道（S180）。
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公开(公告)号：KR100883354B1
公开(公告)日：2009-02-17
申请号：KR1020070109512
申请日：2007-10-30
Applicant: 한국전자통신연구원
CPC classification number: H04B7/0632 , H04B7/0647 , H04L1/0026 , H04L1/0027
Abstract: 본 발명은 직교주파수분할다중접속(OFDMA) 통신 시스템과 같은 다중 반송파 무선 시스템에서 채널 품질 정보(CQI)를 피드백하기 위해 채널 품질 정보의 보고 주기를 결정하는 방법 및 장치에 관한 것으로, 직교주파수 분할다중 접속(OFDMA)을 기반으로 하는 단말에서의 채널 품질 정보의 피드백을 위한 보고 주기 결정 방법에 있어서, (a) 기지국으로부터 수신된 채널을 통해 채널 이득을 계산하는 단계; (b) 공평성 정도를 결정짓는 변수와 상기 계산된 채널 이득을 이용해 가중치를 계산한 다음 상기 계산된 가중치를 이용해 상기 계산된 채널 이득에 대한 가중 채널 품질을 계산하는 단계; (c) 상기 계산된 가중 채널 품질과 임계치를 비교하는 단계; 및 (d) 상기 가중 채널 품질이 상기 임계치 이상인 경우에만 채널 품질 정보의 피드백을 위해 할당된 무선 자원을 이용해 측정된 채널 품질 정보를 피드백하는 단계를 포함한다.
OFDMA, 직교, 주파수, 분할, 다중, CQI, 채널 품질, 피드백, 주기, 전송, 가중 채널 품질-
公开(公告)号：KR1020080040575A
公开(公告)日：2008-05-08
申请号：KR1020070109512
申请日：2007-10-30
Applicant: 한국전자통신연구원
CPC classification number: H04B7/0632 , H04B7/0647 , H04L1/0026 , H04L1/0027
Abstract: A method and an apparatus for determining a report period of channel quality information in a multi-carrier wireless system are provided to improve the report success probability of a user in a good channel state by differently giving a report period of CQI(Channel Quality Information) according to a channel state measured by every user terminal. A user terminal receives a factor for determining an equality degree used for each user terminal and various variables such as a threshold value given to each terminal according to priority levels from a base station and stores them in a memory(201). The user terminal calculates a channel gain by using a pilot signal received from the base station(202). The user terminal calculates a statistical expected value with respect to the calculated channel gain, calculates a weight value by using the factor determining the degree of equality, and calculates a weighted channel quality by multiplying the calculated weight value and the channel gain(203). A CQI transmission determining unit of the user terminal compares the calculated weighted channel quality with the received threshold value(204). If the calculated weighted channel quality is larger than the threshold value, the user terminal feeds back the measured channel quality information to the base station(205).
Abstract translation: 提供一种用于确定多载波无线系统中的信道质量信息的报告周期的方法和装置，通过不同地给出CQI（信道质量信息）的报告周期来提高用户处于良好信道状态的报告成功概率， 根据每个用户终端测量的信道状态。 用户终端根据来自基站的优先级，接收用于确定用于每个用户终端的相等程度的因子和各种变量，例如给予每个终端的阈值，并将它们存储在存储器（201）中。 用户终端通过使用从基站（202）接收的导频信号来计算信道增益。 用户终端相对于计算出的信道增益计算统计期望值，通过使用确定相等程度的因子计算权重值，并通过将计算出的权重值与信道增益相乘来计算加权信道质量（203）。 用户终端的CQI发送确定单元将所计算的加权信道质量与接收到的阈值进行比较（204）。 如果所计算的加权信道质量大于阈值，则用户终端将所测量的信道质量信息反馈给基站（205）。
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