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1. 发明申请

US20090135947A1 METHOD OF SELECTING CANDIDATE VECTOR AND METHOD OF DETECTING TRANSMISSION SYMBOL 有权
标题翻译：选择候选矢量的方法和检测传输符号的方法
公开(公告)号：US20090135947A1
公开(公告)日：2009-05-28
申请号：US12141539
申请日：2008-06-18
申请人： Seung Jae BAHNG , Jae Kwon KIM , Hoon HEO , Hyun Myung WU , Youn Ok PARK , Young Jo BANG , Hyeong Sook PARK , Hoon LEE , Young Ha LEE , Jung Pil CHOI
发明人： Seung Jae BAHNG , Jae Kwon KIM , Hoon HEO , Hyun Myung WU , Youn Ok PARK , Young Jo BANG , Hyeong Sook PARK , Hoon LEE , Young Ha LEE , Jung Pil CHOI
IPC分类号： H04L27/00
CPC分类号： H04L25/067 , H04L25/03203 , H04L2025/03426
摘要： The present invention relates to a method of detecting a candidate vector and a method of detecting a transmission symbol using the same. According to an embodiment of the present invention, in a multiple input multiple output (MIMO) system using spatial multiplexing (SM), a receiver selects candidate vectors corresponding to a layer located at a last row among a plurality of rearranged layers, and sequentially ranks constellation dots of a next layer for each of the selected candidate vectors. Then, a plurality of arbitrary constellation dots are selected from the ranked constellation dots, accumulated costs of the arbitrary constellation dots are calculated, and a candidate vector is selected in correspondence with a constellation dot having a minimal accumulated cost. Then, a new arbitrary constellation dot is selected in place of the constellation dot selected as the candidate vector, an accumulated cost of the selected arbitrary constellation dot is compared with accumulated costs of the other arbitrary constellation dots, and another candidate vector is selected.
摘要翻译：本发明涉及检测候选向量的方法和使用其的发送符号的检测方法。根据本发明的实施例，在使用空间复用（SM）的多输入多输出（MIMO）系统中，接收机选择与多个重排层中位于最后一行的层相对应的候选向量，并且顺次排列每个所选候选向量的下一层的星座点。然后，从分级星座点中选择多个任意星座点，计算任意星座点的累积成本，并且与具有最小累积成本的星座点对应地选择候选矢量。然后，代替选择为候选矢量的星座点，选择新的任意星座点，将所选择的任意星座点的累积成本与其他任意星座点的累积成本进行比较，并选择另一候选矢量。

2. 发明申请

US20100135438A1 SIGNAL DETECTION METHOD AND RECEIVER 有权
标题翻译：信号检测方法与接收机
公开(公告)号：US20100135438A1
公开(公告)日：2010-06-03
申请号：US12627506
申请日：2009-11-30
申请人： Young Jo BANG , Hyeong Sook PARK , Jun-Woo KIM , Kyung Yeol SOHN , Chang Wahn YU , Youn Ok PARK , Jee Hwan AHN , Il Min KIM
发明人： Young Jo BANG , Hyeong Sook PARK , Jun-Woo KIM , Kyung Yeol SOHN , Chang Wahn YU , Youn Ok PARK , Jee Hwan AHN , Il Min KIM
IPC分类号： H04L27/06
CPC分类号： H04L25/067 , H04B7/0413
摘要： Disclosed is a method of detecting signals at a receiver of a communication system with a multiple input multiple output antenna. With the signal detection method, a square of the distance between a received signal vector and a channel status-considered transmission symbol vector is calculated first, and the square of the distance is then classified into first and second components. The first component is minimized to calculate a plurality of first soft symbol estimates. A solution set of the first component is calculated on the basis of the plurality of first soft symbol estimates. The second component is minimized to calculate a plurality of second soft symbol estimates. A solution set of the second component is calculated on the basis of the plurality of second soft symbol estimates. A final solution set is calculated by doing the sum of the first component solution set and the second component solution.
摘要翻译：公开了一种在具有多输入多输出天线的通信系统的接收机处检测信号的方法。利用信号检测方法，首先计算接收信号矢量和通道状态考虑的发送符号向量之间的距离的平方，然后将距离的平方分成第一和第二分量。将第一分量最小化以计算多个第一软符号估计。基于多个第一软符号估计来计算第一分量的解集合。将第二分量最小化以计算多个第二软符号估计。基于多个第二软符号估计来计算第二分量的解集合。通过执行第一分量解集合和第二分量解的和来计算最终解集。

3. 发明申请

US20090141786A1 APPARATUS AND METHOD OF ESTIMATING SIGNAL-TO-NOISE RATIO 有权
标题翻译：装置和估计信号噪声比的方法
公开(公告)号：US20090141786A1
公开(公告)日：2009-06-04
申请号：US12177511
申请日：2008-07-22
申请人： Hyeong Sook PARK , Jun-Woo KIM , Eon Young HONG , Youn Ok PARK
发明人： Hyeong Sook PARK , Jun-Woo KIM , Eon Young HONG , Youn Ok PARK
IPC分类号： H04B17/00 , H04L27/26
CPC分类号： H04L27/2647 , H04B17/336 , H04L27/2662
摘要： The present invention relates an apparatus and method of estimating a signal-to-noise ratio (SNR) of a received signal when the received signal has a timing offset. An apparatus for estimating a signal-to-noise ratio (SNR) according to an exemplary embodiment of the present invention includes a fast Fourier transform (FFT) unit that performs a fast Fourier transform on a received signal to convert the received signal into a frequency domain signal; a preamble selector that extracts a preamble from the frequency domain signal; a correlator that correlates the preamble to a preamble reference signal generated by a receiver to calculate a correlation value; an entire power estimator that calculates entire power; a noise power estimator that applies a differential demodulation method to the correlation value to remove a timing offset and calculate noise power; and an estimating unit that uses the entire power and the noise power to estimate the signal-to-noise ratio (SNR).
摘要翻译：本发明涉及一种当接收信号具有定时偏移量时估计接收信号的信噪比（SNR）的装置和方法。根据本发明的示例性实施例的用于估计信噪比（SNR）的装置包括对接收信号执行快速傅里叶变换的快速傅里叶变换（FFT）单元，以将接收到的信号转换成频率域信号前导码选择器，从所述频域信号中提取前同步码; 相关器，其将所述前导码与由接收器生成的前导码参考信号相关联，以计算相关值; 整个功率估计器，用于计算整个功率; 噪声功率估计器，其对所述相关值应用差分解调方法以去除定时偏移并计算噪声功率; 以及使用整个功率和噪声功率来估计信噪比（SNR）的估计单元。

4. 发明申请

US20120269251A1 METHOD AND APPARATUS FOR ESTIMATING SIGNAL TO NOISE RATIO IN WIRELESS COMMUNICATION SYSTEM 失效
标题翻译：在无线通信系统中估计噪声信噪比的方法和装置
公开(公告)号：US20120269251A1
公开(公告)日：2012-10-25
申请号：US13453450
申请日：2012-04-23
申请人： Hyeong Sook PARK , Jun Woo KIM , Youn Ok PARK
发明人： Hyeong Sook PARK , Jun Woo KIM , Youn Ok PARK
IPC分类号： H04B17/00 , H04W24/00
CPC分类号： H04B17/336 , H04B17/318 , H04B17/345
摘要： There is provided a method and apparatus for estimating a signal to noise ratio (SNR) in a wireless communication system. The apparatus selects a preamble signal for each of a plurality of sectors from a reception signal experienced by fast Fourier transform (FFT), outputs a correlation signal by performing a correlation between the preamble signal for each sector and a preamble reference signal, estimates power of the reception signal and noise power for each sector based on the correlation signal, selects a minimum value from among the noise powers for the sectors, outputs a net power for each sector by subtracting the minimum value from the power of the reception signal for each sector, and calculates the SNR by dividing the net power for each sector by the minimum value.
摘要翻译：提供了一种用于估计无线通信系统中的信噪比（SNR）的方法和装置。该装置从快速傅里叶变换（FFT）所经历的接收信号中选择多个扇区中的每一个的前同步信号，通过执行每个扇区的前导码信号与前导码参考信号之间的相关来输出相关信号，基于相关信号对每个扇区的接收信号和噪声功率，从扇区的噪声功率中选择最小值，通过从每个扇区的接收信号的功率中减去最小值来输出每个扇区的净功率，并且通过将每个扇区的净功率除以最小值来计算SNR。

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