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公开(公告)号：KR101562220B1
公开(公告)日：2015-10-22
申请号：KR1020080112324
申请日：2008-11-12
CPC classification number: H03M13/1171
Abstract: 비이진저밀도패리티검사부호를위한복호방법및 장치에관한것으로서, 저밀도패리티검사부호를위한복호방법은, 채널로부터수신되는신호를복조하여 LLR 값을생성하는과정과, 상기생성된 LLR 값들중 큰값을가지는순서대로소정수의 LLR 값을선택하는과정과, 상기선택된 LLR값들중 가장큰 LLR값과나머지 LLR값들각각의차이값을계산하는과정과, 상기가장큰 LLR값과상기계산된차이값들로이루어진메시지벡터를이용하여 LDPC 복호를수행하는과정을포함하여, 검사노드갱신의연산복잡도를감소시키면서동시에성능이열화되는정도를줄일수 있다.
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公开(公告)号：KR1020150095133A
公开(公告)日：2015-08-20
申请号：KR1020140016262
申请日：2014-02-12
Applicant: 한국과학기술원
CPC classification number: C02F1/705 , B01J23/38 , B01J23/745 , B01J23/8906 , B01J23/8926 , B01J35/002 , B01J35/1009 , B01J35/1014 , B01J37/0236 , B01J37/035 , B01J37/04 , B01J37/08 , B01J37/16 , B01J2523/00 , C02F2101/163 , C02F2103/06 , C02F2305/00 , B01J19/10 , B01J6/00 , B01J23/44 , B01J23/70 , B01J2523/17 , B01J2523/824 , B01J2523/842
Abstract: 본 발명은 3가의 산화철 또는 3가의 산화수산화철을 원료로 사용하여 구리전구체와 팔라듐 전구체가 헤마타이트에 담지되어 질산성 질소를 환원반응에 의해 분해시키는 촉매의 제조방법에 관한 것으로서, 원료를 혼합하여 수용액을 만드는 단계나 수용액에 구리 전구체와 팔라듐 전구체를 혼합하는 단계에서 염산 수용액을 혼합하는 것을 특징으로 한다.
Abstract translation: 本发明涉及通过使用三价氧化铁或三价铁氧化物氢氧化物负载赤铁矿作为铜前体的还原反应将硝酸盐氮还原的催化剂的制造方法， 在通过混合原料制造水溶液的步骤或在水溶液中将铜前体和钯前体混合的步骤中的盐酸溶液。
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公开(公告)号：KR100965728B1
公开(公告)日：2010-06-24
申请号：KR1020070057243
申请日：2007-06-12
CPC classification number: H04L25/03012 , H04L1/0631 , H04L1/0668 , H04L25/0204 , H04L25/0242 , H04L25/0246 , H04L25/067
Abstract: 본 발명은 수신단에서 최대 우도(ML: Maximum Likelihood) 방식을 이용한 신호 검출 방법에 있어서, 송신단의 안테나 개수 및 변조 방식에 따라서 수신된 신호로부터 심볼들을 검출하고, 상기 검출된 심볼들을 사용하여 채널을 측정하고, 상기 측정된 채널에 해당되는 등가 채널 행렬을 결정하고, 상기 등가 채널 행렬에 미리 설정된 치환 행렬을 곱하여 치환 등가 채널 행렬을 결정하고, 상기 결정된 치환 등가 채널 행렬에 대해 큐알(QR) 분해를 수행하고, 상기 QR 분해로 얻어진 심볼들을 사용하여 상기 검출된 심볼들 중에서 제1 심볼들에 대해 경판정을 수행하고, 상기 경판정이 수행된 심볼들과 상기 제1 심볼들의 조합을 이용하여 상기 검출된 심볼들 중에서 상기 제1 심볼들을 제외한 제2 심볼들의 로그 우도 비(LLR: Log Likelihood Ratio) 값을 결정하는 과정을 포함한다.
등가 채널 행렬, 치환 행렬, QR 분해, 로그 우도 비, 최대 우도-
公开(公告)号：KR1020100053280A
公开(公告)日：2010-05-20
申请号：KR1020080112324
申请日：2008-11-12
CPC classification number: H03M13/1171
Abstract: PURPOSE: An apparatus and a method for decoding for a non binary low density parity check decoding are provided to reduce the deterioration of performance by using a new message structure of an EMS(Extended Min-Sum) decoding algorithm. CONSTITUTION: A demodulator(610) demodulates a signal received from a channel and generates LLR value. A decoder(620) selects an LLR of a certain value which is high from generated LLR values. The decodes calculates the difference between highest LLR value and a rest LLR value, uses a message vector, and performs LDPC decoding.
Abstract translation: 目的：提供用于非二进制低密度奇偶校验解码的解码装置和方法，以通过使用EMS（扩展最小和）解码算法的新消息结构来减少性能的恶化。 构成：解调器（610）解调从通道接收的信号并产生LLR值。 解码器（620）从产生的LLR值中选择一个高值的LLR。 解码计算最高LLR值和休息LLR值之间的差异，使用消息向量，并执行LDPC解码。
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Patent Agency Ranking
公开(公告)号：KR1020100038557A
公开(公告)日：2010-04-15
申请号：KR1020080097574
申请日：2008-10-06
IPC: H04B7/04
CPC classification number: H04B7/0626 , H04B7/0663
Abstract: PURPOSE: A channel feedback device in a mobile communications system and a method thereof are provided to improve feedback efficiency through feedback of elements of Grassmannian space which represents a row space. CONSTITUTION: Using a signal received from a transmission end, a channel is estimated(203). Using an orthogonalization technique, a normal form about the estimated channel is produced(205). A row operation of a matrix, which is produced according to the normal form, is performed. A first matrix which includes row space information of the estimated channel is produced(207). After the first matrix is quantized, the quantized matrix is fed back to the transmission end(209).
Abstract translation: 目的：提供移动通信系统中的信道反馈设备及其方法，以通过反映代表行空间的Grassmannian空间的元素来提高反馈效率。 构成：使用从发送端接收的信号，估计通道（203）。 使用正交化技术，产生关于估计信道的正常形式（205）。 执行根据正常形式产生的矩阵的行操作。 产生包括估计信道的行空间信息的第一矩阵（207）。 在量化第一矩阵之后，将量化矩阵反馈到传输端（209）。
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公开(公告)号：KR1020090118717A
公开(公告)日：2009-11-18
申请号：KR1020080044665
申请日：2008-05-14
IPC: H04B7/04
CPC classification number: H04L25/03203 , H04L25/03191 , H04L25/0328 , H04L25/03343 , H04L2025/03426 , H04B7/0456 , H04B7/0452
Abstract: PURPOSE: A low complexity precoding device based on vector perturbation in a multi user multi antenna communication system is provided to obtain low complexity and similar performance. CONSTITUTION: A reference value of a cumulative branch metric of a candidate symbol is determined(S1). A candidate having a cumulative branch metric value is removed. The cumulative branch metric value exceeds the reference value of a cumulative branch metric value of a determined candidate symbol. The cumulative branch metric value of the candidate symbol is registered as entry(S2). The cumulative branch metric value of the candidate symbol does not exceed the reference value of a cumulative branch metric value of the candidate symbol. A cumulative branch metric value of the smallest candidate symbol among cumulative branch metric values registered as entry is selected(S3).
Abstract translation: 目的：提供一种基于多用户多天线通信系统中矢量扰动的低复杂度预编码设备，以获得低复杂度和类似性能。 构成：确定候选符号的累积分支量度的参考值（S1）。 具有累积分支量度值的候选者被去除。 累积分支度量值超过确定的候选符号的累积分支量度值的参考值。 候选符号的累积分支量度值被登记为条目（S2）。 候选符号的累积分支度量值不超过候选符号的累积分支量度值的参考值。 选择登记为条目的累积分支度量值中的最小候选符号的累积分支量度值（S3）。
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公开(公告)号：KR1020080110051A
公开(公告)日：2008-12-18
申请号：KR1020070058338
申请日：2007-06-14
Abstract: A signal detection system and a method in a communications system applying an algorithm for calculating the approximation likelihood ratio with low complexity are provided to suggest an efficient LLR algorithmic in the communications system. A first symbol transmitted from a transmitter is received in a communications system using at least two transmission antennas. The first symbol is extended to the candidate symbols considering a modulation order as many as a number. A log likelihood ratio(LLR) value is determined by a bit(309). The candidate symbols of M between expanded candidate symbols is selected(315). The candidate symbols of M are expanded as a candidate symbol considering the modulation order as many as number. The LLR value about each bit of the expanded candidate symbols is determined(317). The LLR value of the same bit is updated.
Abstract translation: 提供了一种在通信系统中应用用于计算低复杂度的近似似然比的算法的通信系统中的信号检测系统和方法，以在通信系统中提出有效的LLR算法。 在使用至少两个发送天线的通信系统中接收从发送器发送的第一符号。 考虑到与数字一样多的调制阶数，第一符号被扩展到候选符号。 对数似然比（LLR）值由位（309）确定。 选择扩展的候选符号之间的M的候选符号（315）。 考虑到数量多的调制阶数，将M的候选符号扩展为候选符号。 确定关于扩展的候选符号的每个比特的LLR值（317）。 同一位的LLR值被更新。
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公开(公告)号：KR1020080109201A
公开(公告)日：2008-12-17
申请号：KR1020070057243
申请日：2007-06-12
CPC classification number: H04L25/03012 , H04L1/0631 , H04L1/0668 , H04L25/0204 , H04L25/0242 , H04L25/0246 , H04L25/067
Abstract: An apparatus for detecting signal using maximum likelihood scheme and method thereof are provided to reduce operation quantity of a LLR(Log Likelihood Ratio) value by providing a simplified ML(Maximum Likelihood) detection method. A method for detecting signal using maximum likelihood scheme comprises the following steps: a step for estimating a channel and detecting symbols corresponding to the number of antenna of a sending terminal and a modulation system(302, 304); a step for determining a equivalence channel matrix corresponding to an estimated channel; a step for determining a substitution equivalence channel matrix by multiplying a predetermined substitution matrix in the equivalence channel matrix(306); a step for performing QR decomposition about the substitution equivalence channel matrix(308); and a step for determining a log likelihood ratio value from a receiving signal vector according to the QR decomposition.
Abstract translation: 提供了使用最大似然方案检测信号的装置及其方法，以通过提供简化的ML（最大似然）检测方法来减少LLR（对数似然比）值的操作量。 使用最大似然方案检测信号的方法包括以下步骤：用于估计信道并检测与发送终端和调制系统的天线数量相对应的符号的步骤（302,304）; 用于确定与所估计的信道相对应的等价信道矩阵的步骤; 通过将等效信道矩阵（306）中的预定替换矩阵相乘来确定替换等价信道矩阵的步骤; 对替代等价信道矩阵（308）进行QR分解的步骤; 以及根据QR分解从接收信号矢量确定对数似然比值的步骤。
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公开(公告)号：KR1020010086912A
公开(公告)日：2001-09-15
申请号：KR1020000010895
申请日：2000-03-04
Applicant: 한국과학기술원
IPC: H01B3/12
CPC classification number: H01G4/1227 , C04B35/4682 , C04B35/626
Abstract: PURPOSE: A method for fabricating a BaTiO3(Barium Titanate) group dielectric is provided to offer a BaTiO3(Barium Titanate) group dielectric having a high dielectric constant and a low dielectric loss by making a smaller average particle size and increasing a relative density. CONSTITUTION: A method for fabricating a BaTiO3(Barium Titanate) group dielectric performs a wet mixing operation on a powder over-mixed by a BaTiO3 powder and Tio2 by 0.4mol with a ZrO2 ball by means of an alcoholic solvent during 12-48 hours, and a dry grinding operation on it in 100°C-150°C during 6-36 hours, a grind sieving operation on it, pours out it into a metal mold, molds it, and performs a cold isostatic press(CIP) molding operation on it with a pressure of 170-230MPa. And the method for fabricating a BaTiO3(Barium Titanate) group dielectric performs an electrothermal process on it in a hydrogen(H2) atmosphere by 1220°C-1280°C or a dioxidizing atmosphere of a mixing gas which is hydrogen(H2):nitrogen(N)=5-100:0-95, during 2-15 hours, and then sinters it in 1320°C-1380°C during 2-100 hours, preferably during 5-48 hours, in air atmosphere.
Abstract translation: 目的：提供一种制造BaTiO 3（钛酸钡）基电介质的方法，通过使平均粒径更小并提高相对密度，提供具有高介电常数和低介电损耗的BaTiO3（钛酸钡）组电介质。 构成：制造BaTiO 3（钛酸钡）基团电介质的方法，通过BaTiO 3粉末和Tio2用ZrO 2球，通过醇溶剂在12-48小时内用0.4摩尔过度混合的粉末进行湿式混合操作， 并在6-36小时内在100℃-150℃下对其进行干式研磨操作，对其进行研磨操作，将其倒入金属模具中，对其进行成型，并进行冷等静压（CIP）成型操作 压力170-230MPa。 并且制备BaTiO 3（钛酸钡）基电介质的方法在氢（H 2）气氛中在1220℃-1280℃下进行电热处理，或者在氢气（H 2）：氮气混合气体的二氧化气氛中进行电热处理 （N）= 5-100:0-95，在2-15小时内，然后在空气气氛中在1320℃-1380℃下烧结2-100小时，优选5-48小时。
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