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    • 16. 发明授权
    • Residual frequency, phase, timing offset and signal amplitude variation tracking apparatus and methods for OFDM systems
    • 用于OFDM系统的残余频率,相位,定时偏移和信号幅度变化跟踪装置和方法
    • US07916797B2
    • 2011-03-29
    • US11286996
    • 2005-11-22
    • Heejung YuTaehyun JeonMyung-Soon KimEun-Young ChoiSok-Kyu LeeDeuk-Su Lyu
    • Heejung YuTaehyun JeonMyung-Soon KimEun-Young ChoiSok-Kyu LeeDeuk-Su Lyu
    • H04K1/10H04L27/00H04J11/00
    • H04L27/266H04L27/2659H04L27/2662H04L27/2675H04L27/2682H04L27/2685H04L27/2695
    • An error tracking apparatus and method for tracking a residual frequency error, a phase error, a timing error, and a signal amplitude variation to enhance a phase error tracking performance and a tracking speed in an orthogonal frequency division multiplexing (OFDM) system is provided. The error tracking apparatus and method include: a frequency error corrector for correcting a frequency at a time domain by adding a tracking carrier error estimating value to an initial carrier frequency error estimating value; a signal amplitude tracking corrector for controlling a signal amplitude by multiplying an input signal converted by a fast Fourier transform (FFT) by an output value corresponding to a calculated power of a receive pilot signal; a channel corrector for outputting a channel correcting signal by multiplying the receive pilot signal by a complex conjugate of a frequency channel response of the receive pilot signal; a carrier frequency error estimator for estimating a carrier frequency error parameter using the channel-corrected pilot and providing the tracking carrier frequency error estimating value; a time offset estimator for estimating a time offset parameter using the channel-corrected pilot; and a carrier phase error estimator for estimating a carrier phase error parameter using the channel-corrected pilot.
    • 提供了一种用于跟踪残余频率误差,相位误差,定时误差和信号幅度变化的误差跟踪装置和方法,以增强正交频分复用(OFDM)系统中的相位误差跟踪性能和跟踪速度。 误差跟踪装置和方法包括:频率误差校正器,用于通过将初始载波频率误差估计值加上跟踪载波误差估计值来校正时域的频率; 信号幅度跟踪校正器,用于通过将通过快速傅里叶变换(FFT)转换的输入信号乘以与所计算的接收导频信号的功率相对应的输出值来控制信号幅度; 信道校正器,用于通过将接收导频信号乘以接收导频信号的频率信道响应的复共轭来输出信道校正信号; 载波频率误差估计器,用于使用所述信道校正的导频来估计载波频率误差参数,并提供所述跟踪载波频率误差估计值; 时间偏移估计器,用于使用所述通道校正的导频来估计时间偏移参数; 以及载波相位误差估计器,用于使用信道校正的导频来估计载波相位误差参数。
    • 17. 发明授权
    • Apparatus and method for detecting signal in wireless communication system
    • 无线通信系统信号检测装置及方法
    • US08817920B2
    • 2014-08-26
    • US12965282
    • 2010-12-10
    • Jung-Bo SonEun-Young ChoiSok-Kyu Lee
    • Jung-Bo SonEun-Young ChoiSok-Kyu Lee
    • H04L27/06
    • H04L27/3863H04L5/0023H04L5/005H04L27/2647
    • The apparatus includes a radio frequency (RF) unit configured to arrange a plurality of symbols received through an antenna at a frequency domain, an analog to digital (AD) converter configured to converts the plurality of symbols arranged at the frequency domain to digital symbols, a fast Fourier transform (FFT) unit configured to transform the digital symbols through a fast Fourier transform scheme, a compensator configured to compensate a gain mismatch between an I-channel and a Q-channel of the transformed digital symbols, a mapping unit configured to the compensated digital symbols to a constellation diagram, and a detector configured to correlate the mapped symbols, extract correlation results, and detect a high throughput (HT) signal using the extracted correlation results.
    • 该装置包括:射频(RF)单元,被配置为布置以频域通过天线接收的多个符号;模拟数字(AD)转换器,被配置为将在频域处布置的多个符号转换为数字符号; 被配置为通过快速傅里叶变换方案对数字符号进行变换的快速傅立叶变换(FFT)单元,配置为补偿经变换的数字符号的I信道和Q信道之间的增益失配的补偿器,配置为 将经补偿的数字符号转换成星座图,以及检测器,被配置为使所映射的符号相关,提取相关结果,并使用所提取的相关结果检测高吞吐量(HT)信号。
    • 18. 发明授权
    • Decoding device and method for MIMO system
    • MIMO系统的解码设备和方法
    • US08265204B2
    • 2012-09-11
    • US12602353
    • 2008-05-19
    • Eun-Young ChoiChan Ho YoonJung Bo SonHun Sik KangSok-Kyu LeeSeok Hyun Yoon
    • Eun-Young ChoiChan Ho YoonJung Bo SonHun Sik KangSok-Kyu LeeSeok Hyun Yoon
    • H04L27/06
    • H04L1/0631H04L1/006
    • The present invention relates to a decoding device and method for a MIMO system. A linear process is applied to a received signal vector by using a channel matrix estimated from the received signal vector and a poly-diagonalized matrix, and a soft decision value is acquired through a trellis decode by using the linear process result. Since the linear preprocess is performed by using the poly-diagonalized matrix, it is possible to receive a MIMO signal having good packet error rate performance and less complexity. Also, since the tail-biting trellis decoding method is used based on the poly-diagonalized matrix that is generated by poly-diagonalizing the effective channel matrix during the process for eliminating the signal interference, the soft decision value for the symbol can be generated with a simple hardwired device and less operation complexity.
    • 本发明涉及MIMO系统的解码装置和方法。 通过使用从接收信号向量和多对角化矩阵估计的信道矩阵将线性处理应用于接收信号向量,并且通过使用线性处理结果通过网格解码获取软判决值。 由于通过使用多对角化矩阵来执行线性预处理,所以可以接收具有良好的分组错误率性能和较低复杂度的MIMO信号。 另外,由于基于在消除信号干扰的处理期间通过对有效信道矩阵进行多对角化而产生的多对角化矩阵使用尾巴格状解码方法,所以可以生成符号的软判决值, 简单的硬连线设备,操作复杂度较低。