公开(公告)号：US20090161779A1

公开(公告)日：2009-06-25

申请号：US12257723

申请日：2008-10-24

申请人： Sergey Zhidkov ,  Guanghui Liu ,  Jinhee Cheon

发明人： Sergey Zhidkov ,  Guanghui Liu ,  Jinhee Cheon

IPC分类号： H04L25/08 ,  H04L27/28

CPC分类号： H04L25/03159 ,  H04L25/03324 ,  H04L25/03821

摘要： An inter-carrier interference ICI cancellation method of a kth sub-carrier of an orthogonal frequency division multiplexing OFDM receiving signal (k is a natural number greater than 1 and less than or equal to n, n is a number of sub-carriers) includes canceling an inter-carrier interference element produced by at least one sub-carrier among inter-carrier interference elements of the kth sub-carrier by a decision feedback equalization DFE method, and canceling another inter-carrier interference element produced by at least another sub-carrier among inter-carrier interference elements of the kth sub-carrier by a linear minimum mean square error equalization LMMSE method.

摘要翻译： 正交频分复用OFDM接收信号（k是大于1且小于等于n的自然数，n是子载波数）的第k个子载波的载波间干扰ICI消除方法包括 通过判决反馈均衡DFE方法消除由第k个子载波的载波间干扰元素中的至少一个子载波产生的载波间干扰元素，并且消除由至少另一子载波产生的另一个载波间干扰元素， 载波在第k个子载波的载波间干扰元素中通过线性最小均方误差均衡LMMSE方法。

公开(公告)号：US20090060016A1

公开(公告)日：2009-03-05

申请号：US12193075

申请日：2008-08-18

申请人： Guanghui Liu

发明人： Guanghui Liu

IPC分类号： H04L27/28 ,  H03H7/30 ,  H04B1/10

CPC分类号： H04L25/03159 ,  H04L25/0202 ,  H04L2025/03414 ,  H04L2025/03522

摘要： An inter-carrier interference (ICI) mitigating equalizer includes a channel estimator, a channel calculator, an ICI estimator, a subtracter, and an equalizer. The channel estimator estimates a channel response from a received signal, and the channel calculator calculates a basic component of a channel response and fluctuating components of the channel response from the estimated channel response. The ICI estimator multiplies the fluctuating components of the channel response by a received signal in a frequency domain, filters the multiplication results according to filter coefficients, and estimates an ICI component included in the received signal based on the filtering results. The subtracter subtracts the ICI component from the received signal in the frequency domain. The equalizer equalizes an output signal of the subtracter based on the basic component of the channel response.

摘要翻译： 载波间干扰（ICI）减轻均衡器包括信道估计器，信道计算器，ICI估计器，减法器和均衡器。 信道估计器从接收信号估计信道响应，并且信道计算器从估计的信道响应计算信道响应的基本分量和信道响应的波动分量。 ICI估计器将频道响应的波动分量乘以频域中的接收信号，根据滤波器系数对乘法结果进行滤波，并根据滤波结果估计包含在接收信号中的ICI分量。 减法器从频域的接收信号中减去ICI分量。 均衡器基于信道响应的基本分量来平衡减法器的输出信号。

公开(公告)号：US20080137525A1

公开(公告)日：2008-06-12

申请号：US11752394

申请日：2007-05-23

申请人： Guanghui Liu

发明人： Guanghui Liu

IPC分类号： H04J11/00 ,  H03D1/04

CPC分类号： H04L25/0232 ,  H04L27/2647

摘要： A channel estimation method and apparatus based on two adjacent windows. The channel estimation method includes scanning a signal containing noise and channel impulse response (CIR) information with a first window and a second window, detecting a CIR distribution area based on the ratio between the average power of the signal within the first window and the average power of the signal within the second window and at least one threshold value, eliminating the noise from the CIR distribution area and estimating the CIR information. Accordingly, noise interference can be minimized and accurate channel estimation can be accomplished.

摘要翻译： 一种基于两个相邻窗口的信道估计方法和装置。 信道估计方法包括利用第一窗口和第二窗口扫描包含噪声和信道脉冲响应（CIR）信息的信号，基于第一窗口内的信号的平均功率与平均值之间的比率来检测CIR分布区域 第二窗口内的信号的功率和至少一个阈值，消除来自CIR分配区域的噪声并估计CIR信息。 因此，可以使噪声干扰最小化并且可以实现准确的信道估计。