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公开(公告)号：KR1020140048029A
公开(公告)日：2014-04-23
申请号：KR1020130034808
申请日：2013-03-29
Applicant: 한국전자통신연구원
CPC classification number: H04J14/0254 , H04W56/004
Abstract: Disclosed is a method for measuring and correcting delay time between a digital unit and multiple radio units. The method for measuring and correcting the delay time according to one embodiment of the present invention measures the delay time between the digital unit and the radio units and corrects the delay time. Thereby, a capacity is increased and performance is improved by equalizing time synchronization between the radio units for cooperative communication. [Reference numerals] (400) Measure delay time by using a clock counter corresponding to each RU; (410) Select a clock counter value with the maximum delay time as reference delay time value by comparing the clock counter values of each RU; (420) Calculate relative delay time value of each RU; (430) Store a data value to be transmitted to each RU from DU in proportion to the relative delay time and transmit the data value; (AA) Start; (BB) End
Abstract translation: 公开了一种用于测量和校正数字单元与多个无线电单元之间的延迟时间的方法。 根据本发明的一个实施例的用于测量和校正延迟时间的方法测量数字单元和无线电单元之间的延迟时间并校正延迟时间。 从而，通过使用于协作通信的无线电单元之间的时间同步相等，提高了容量并提高了性能。 （附图标记）（400）通过使用对应于每个RU的时钟计数器来测量延迟时间; （410）通过比较每个RU的时钟计数器值，选择具有最大延迟时间的时钟计数器值作为参考延迟时间值; （420）计算每个RU的相对延迟时间值; （430）将要从DU发送的数据值与相对延迟时间成比例地存储到每个RU，并发送数据值; （AA）开始; （BB）结束
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公开(公告)号：KR101269683B1
公开(公告)日：2013-06-04
申请号：KR1020090091963
申请日：2009-09-28
Abstract: 본 발명은 신호 검출 방법 및 수신 장치에 관한 것이다. 본 발명에 따른 신호 검출 방법은 다중 입출력 안테나를 포함하는 통신 시스템의 수신 장치가 신호를 검출하는 방법으로서, 수신 신호 벡터와 채널 상태가 고려된 송신 심볼 벡터 사이의 거리의 제곱 값을 구하는 단계, 상기 거리의 제곱 값을 제1 성분 및 제2 성분으로 분류하는 단계, 상기 제1 성분을 최소화 하여 복수의 제1 연성해(soft symbol estimate)를 구하는 단계, 상기 복수의 제1 연성해를 기초로 상기 제1 성분의 해집합을 구하는 단계, 상기 제2 성분을 최소화 하여 복수의 제2 연성해를 구하는 단계, 상기 복수의 제2 연성해를 기초로 상기 제2 성분의 해집합을 구하는 단계, 그리고 상기 제1 성분의 해집합과 상기 제2 성분의 해집합을 합하여 최종 해집합을 구하는 단계를 포함한다.
디텍션, 디코딩, MIMO, likelihood-
公开(公告)号：KR1020130003104A
公开(公告)日：2013-01-09
申请号：KR1020110064163
申请日：2011-06-30
Applicant: 한국전자통신연구원
IPC: H04L27/26
CPC classification number: H04L27/2607 , H04L5/0035 , H04L27/2662 , H04L27/2691
Abstract: PURPOSE: A method for demodulating a downstream link signal in a wireless communication system and a device thereof are provided to efficiently use wireless resources by controlling a length of a CP through proper scheduling. CONSTITUTION: A first OFDM(Orthogonal Frequency Division Multiplexing) signal is received from a first node servicing a terminal. A second OFDM signal is received from a second node. The first and the second OFDM signals are demodulated in an FFT(Fast Fourier Transform) section. The first and the second OFDM signals are a normal mode signal having a first CP(701) or a cooperative mode having a second CP(702). A length of the second CP is longer than a length of the first CP. [Reference numerals] (701) Short CP; (702) Long CP; (703) Normal mode demodulation; (704) Cooperative mode demodulation; (705) Relay delay; (AA) First OFDM signal; (BB) Second OFDM signal
Abstract translation: 目的：提供一种用于解调无线通信系统中的下行链路信号的方法及其装置，以通过适当调度来控制CP的长度来有效地使用无线资源。 构成：从服务于终端的第一节点接收第一OFDM（正交频分复用）信号。 从第二节点接收第二OFDM信号。 第一和第二OFDM信号在FFT（快速傅里叶变换）部分被解调。 第一和第二OFDM信号是具有第一CP（701）或具有第二CP（702）的协作模式的正常模式信号。 第二CP的长度比第一CP的长度长。 （附图标记）（701）短CP; （702）长CP; （703）正常模式解调; （704）协同模式解调; （705）继电器延时; （AA）第一OFDM信号; （BB）第二OFDM信号
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公开(公告)号：KR1020120119577A
公开(公告)日：2012-10-31
申请号：KR1020110037608
申请日：2011-04-22
Applicant: 한국전자통신연구원
IPC: H04L27/26
CPC classification number: H04B17/336 , H04B17/318 , H04B17/345 , H04L27/2692
Abstract: PURPOSE: A method for estimating a signal to noise ratio in a wireless communication system and an apparatus thereof are provided to improve a SNR(Signal To Noise Ratio) estimated performance by increasing a SNR ratio. CONSTITUTION: A sector preamble selecting unit(301) selects each sector preamble signal of a plurality of sectors for a received signal passing through FFT(Fast Fourier Transform) outputting. A correlator(302) outputs a correlation signal by performing the correlation of a preamble reference signal and a sector preamble signal. A signal power estimation part(203) estimates received signal power for each sector based on the correlation signal. Noise power estimation parts(301-303) estimates noise power for each sector based on the correlation signal. A minimum value selection part(304) selects a minimum value of the noise power for each sector. An adder(205) outputs pure power for each sector by subtracting the selected minimum value from the received signal power for each sector. A divider(206) calculates a signal to noise ratio. [Reference numerals] (203) Signal power estimation part; (303) Sector 2, a noise power estimation part; (304) Minimum value selection part; (AA) Sector preamble selection part; (BB) Correlator; (CC) Sector 0, a noise power estimation part; (DD) Sector 1, a noise power estimation part
Abstract translation: 目的：提供一种用于估计无线通信系统中的信噪比的方法及其装置，以通过增加SNR比来提高SNR（信噪比）估计性能。 构成：扇区前导码选择单元（301）选择通过FFT（快速傅里叶变换）输出的接收信号的多个扇区的每个扇区前导信号。 相关器（302）通过执行前导码参考信号和扇区前导信号的相关来输出相关信号。 信号功率估计部（203）基于相关信号估计每个扇区的接收信号功率。 噪声功率估计部分（301-303）基于相关信号估计每个扇区的噪声功率。 最小值选择部（304）选择每个扇区的噪声功率的最小值。 加法器（205）通过从每个扇区的接收信号功率中减去所选择的最小值，为每个扇区输出纯功率。 分频器（206）计算信噪比。 （203）信号功率估计部; （303）扇区2，噪声功率估计部分; （304）最小值选择部分; （AA）扇区前导选择部分; （BB）相关器; （CC）扇区0，噪声功率估计部分; （DD）扇区1，噪声功率估计部分
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公开(公告)号：KR101018855B1
公开(公告)日：2011-03-04
申请号：KR1020080129455
申请日：2008-12-18
IPC: H04W72/04
CPC classification number: H04W72/042
Abstract: 본 발명은 자원 할당 정보 전송 방법 및 그 장치에 관한 것이다.
자원 할당 정보를 전송하는 장치는 고정 할당 영역에 신규 단말에 대한 무선자원을 고정할당 하는 경우, 무선 자원을 할당하는 자원 할당 방식을 판별하고, 자원 할당 방식에 따라 할당이 이루어진 자원의 할당 형태를 판별하여, 판별된 자원 할당 방식 및 자원의 할당 형태를 토대로 할당된 자원에 대한 할당 정보를 복수의 정보 표시 방식 중 하나의 정보 표시 방식을 선택한다. 다음, 선택된 표시 방식을 토대로 상기 자원 할당 정보를 구성하여 자원 할당 정보를 전송 한다.
이로써, 본 발명은 패킷 통신방식의 이동통신 시스템에서는 고정할당 방식으로 데이터를 전송하여, 하향링크 맵의 크기를 최소로 할 수 있다.
Fixed Allocation, Circuit mode-
Patent Agency Ranking
公开(公告)号：KR1020100070766A
公开(公告)日：2010-06-28
申请号：KR1020080129457
申请日：2008-12-18
IPC: H04L12/66
CPC classification number: H04L12/66
Abstract: PURPOSE: A transmitter and a method for transmitting and receiving voice data for a voice over internet protocol(VOIP) service are provided to minimize a processing delay by eliminating sound data, which is delayed, in a previous transmission period. CONSTITUTION: A sound signal detector(102) detects sound signal from inputted analog signal. In the event the sound signal is detected by the sound signal detector, a plurality of sampling units(103) outputs a plurality of sampled signals which has sampled the analog signal with an identical frequency and in different phases. An analog-to-digital converter(104) converts the sampled signals into digital signals and outputs a plurality of sound data. A plurality of modulators(105) modulates the sound data and outputs a plurality of sound data packets. A time stamp bit is inserted into the sound data packet by the modulators.
Abstract translation: 目的：提供一种用于通过因特网协议语音（VOIP）服务发送和接收语音数据的发射机和方法，以通过消除在先前传输周期中被延迟的声音数据来最小化处理延迟。 声明信号检测器（102）检测输入的模拟信号的声音信号。 在由声音信号检测器检测到声音信号的情况下，多个采样单元（103）输出以相同频率和不同相位采样模拟信号的多个采样信号。 模数转换器（104）将采样信号转换为数字信号并输出多个声音数据。 多个调制器（105）调制声音数据并输出多个声音数据包。 时间戳位由调制器插入到声音数据包中。
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公开(公告)号：KR1020100062905A
公开(公告)日：2010-06-10
申请号：KR1020090091963
申请日：2009-09-28
CPC classification number: H04B7/0857 , H04B7/0413 , H04L27/2649
Abstract: PURPOSE: A method for detecting a signal and a receiving device is provided to detect and decode the signal with low complexity at a receiving terminal of a communications system including a multiple input/ output antenna. CONSTITUTION: The distance of a receiving signal vector and a transmitting symbol vector is squared(S210). The square of distance is classified as a first component and a second component. A first component is minimized. A plural first soft symbol estimates are obtained(S220). The solution set of the first component is obtained(S230). A second component is minimized. A plurality of second soft symbols are obtained(S240). The solution set of the second component is obtained(S250). The solution set of the first component and solution set of the second component are combined. The final solution set is obtained(S260).
Abstract translation: 目的：提供一种用于检测信号和接收装置的方法，用于在包括多个输入/输出天线的通信系统的接收终端处以低复杂度检测和解码信号。 构成：接收信号矢量和发射符号矢量的距离平方（S210）。 距离的平方分为第一分量和第二分量。 第一个组件被最小化。 获得多个第一软符号估计（S220）。 获得第一分量的解集（S230）。 第二个组件被最小化。 获得多个第二软符号（S240）。 获得第二分量的解集（S250）。 组合第二组分的第一组分和溶液组的溶液组。 得到最终解集（S260）。
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公开(公告)号：KR1020090053148A
公开(公告)日：2009-05-27
申请号：KR1020070119826
申请日：2007-11-22
CPC classification number: H04L1/0054 , H04B7/0413 , H04B7/0857 , H04L27/2649
Abstract: 본 발명은 로그우도비 산출 방법 및 송신 신호 검출 방법에 관한 것이다.
본 발명은 수신된 신호에 기초해 송신 심볼 후보 벡터를 검출하면, 임계치와 각 송신 심볼 후보 벡터에 대한 ML 메트릭을 산출하고, 임계치보다 큰 ML 메트릭은 임계치로 갱신한다. 그리고, 갱신된 ML 메트릭과 임계치를 이용하여 각 송신 신호 비트에 대한 로그우도비를 산출하고, 이를 이용하여 송신 신호를 검출한다.
송신 심볼 후보 벡터, 로그우도비, 유클리디언 거리, ML 메트릭-
公开(公告)号：KR100888860B1
公开(公告)日：2009-03-17
申请号：KR1020070127019
申请日：2007-12-07
IPC: H04L27/38
CPC classification number: H04L25/067 , H04L1/005
Abstract: A method and an apparatus for dividing a receiving symbol signal modulated into a bit reflected gray code to bit information are provided to simplify the complexity of the division of the bit information inputted to an iterative decoder. A bit information dividing device includes a positive integer converting unit(130), a code determining unit(140) and an operation unit(150). The positive integer converting unit calculates the positive integer for the receiving symbol signal. The code determining unit determines the code of the receiving symbol signal. The operation unit converts the receiving symbol signal into the bit information by using the value of the receiving symbol signal, and the arrangement value of the bits and a coordinate axis movement value of the bit group.
Abstract translation: 提供了一种用于将被调制成位反射灰度码的接收码元信号划分为比特信息的方法和装置，以简化输入到迭代译码器的比特信息划分的复杂度。 位信息分割装置包括正整数转换单元（130），代码确定单元（140）和操作单元（150）。 正整数转换单元计算接收符号信号的正整数。 代码确定单元确定接收符号信号的代码。 操作单元通过使用接收符号信号的值和比特的排列值和比特组的坐标轴移动值将接收符号信号转换成比特信息。
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公开(公告)号：KR1020080052864A
公开(公告)日：2008-06-12
申请号：KR1020060124586
申请日：2006-12-08
CPC classification number: H04L27/266 , H04L27/2659 , H04L27/2679 , H04L27/2695
Abstract: An apparatus and a method for compensating a frequency offset in an OFDMA(Orthogonal Frequency Division Multiplexing) system are provided to efficiently compensate for a frequency offset of an estimated decimal time and a frequency offset of an estimated positive number time. An apparatus for compensating a frequency offset in an OFDMA(Orthogonal Frequency Division Multiplexing) system includes a first frequency offset estimator(401), a second frequency offset estimator(402), a calculator(405), a switch(404), a voltage controlled oscillator(206), and a controller(406). The first frequency offset estimator estimates a first frequency offset. The second frequency offset estimator estimates a second frequency offset. The calculator adds the estimated first frequency offset to the estimated second frequency offset. The switch is located between the second frequency offset estimator and the calculator and switches an input of the second frequency offset transmitted from the second frequency offset estimator to the calculator. The voltage controlled oscillator compensates for a frequency offset based on the first frequency offset received from the calculator or an addition of the first frequency offset and the second frequency offset. The controller inputs the second frequency offset to the calculator by controlling the switch, and compensates for the addition of the first frequency offset and the second frequency offset if the compensation of the first frequency offset is completed.
Abstract translation: 提供了用于补偿OFDMA（正交频分复用）系统中的频率偏移的装置和方法，以有效地补偿估计的小数时间的频率偏移和估计的正数时间的频率偏移。 用于补偿OFDMA（正交频分复用）系统中的频率偏移的装置包括第一频率偏移估计器（401），第二频率偏移估计器（402），计算器（405），开关（404），电压 受控振荡器（206）和控制器（406）。 第一频率偏移估计器估计第一频率偏移。 第二频率偏移估计器估计第二频率偏移。 计算器将估计的第一频率偏移量添加到估计的第二频率偏移量。 开关位于第二频率偏移估计器和计算器之间，并将从第二频率偏移估计器发送的第二频率偏移的输入切换到计算器。 压控振荡器基于从计算器接收的第一频率偏移或第一频率偏移和第二频率偏移的相加来补偿频率偏移。 控制器通过控制开关将第二频率偏移输入到计算器，并且如果第一频率补偿的补偿完成，则补偿第一频率偏移和第二频率偏移的相加。
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