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公开(公告)号：US08223862B2
公开(公告)日：2012-07-17
申请号：US12588585
申请日：2009-10-20
CPC分类号： H04L27/2647 , H04L25/022 , H04L25/0248 , H04L25/03159 , H04L25/03821
摘要： The OFDM channel estimation and Inter-Carrier Interference (ICI) cancellation method uses a few pilots within Orthogonal Frequency Division Multiplexing (OFDM) systems in general, and mobile OFDM systems in particular. The frequency domain channel is estimated using an eigenvalue based model reduction technique with high accuracy. A Minimum Mean Square Error (MMSE) based Finite Impulse Response (FIR) equalizer is then used to obtain an ICI free estimate of the transmitted signal.
摘要翻译： OFDM信道估计和载波间干扰（ICI）消除方法通常在正交频分复用（OFDM）系统中使用几个导频，特别是移动OFDM系统。 使用基于特征值的模型降低技术来估计频域信道，其具有高精度。 然后使用基于最小均方误差（MMSE）的有限脉冲响应（FIR）均衡器来获得发射信号的无ICI估计。
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公开(公告)号：US08705642B2
公开(公告)日：2014-04-22
申请号：US13090921
申请日：2011-04-20
CPC分类号： H04L25/022 , H04L25/0248 , H04L25/03159 , H04L25/03821 , H04L27/2613 , H04L27/2626
摘要： The method for mitigating interference in Orthogonal Frequency Division Multiplexing (OFDM) communications systems uses comb-type pilot signals in a doubly selective channel where the pilot signals are calculated to have zero correlation sequences in order to maintain orthogonality where there is a high Doppler effect to mitigate intercarrier interference. The pilot signals may be precomputed, stored in a look-up table, and selected based upon total power constraints of the pilot signals. The steps of the method may be performed by a Finite Impulse Response (FIR) equalizer.
摘要翻译： 用于减轻正交频分复用（OFDM）通信系统中的干扰的方法在双选择性信道中使用梳状导频信号，其中导频信号被计算为具有零相关序列，以便保持具有高多普勒效应的正交性 减轻载波间干扰。 导频信号可以被预先计算，存储在查找表中，并且基于导频信号的总功率约束来选择。 该方法的步骤可以通过有限脉冲响应（FIR）均衡器来执行。
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公开(公告)号：US20110090975A1
公开(公告)日：2011-04-21
申请号：US12588585
申请日：2009-10-20
IPC分类号： H04L27/28
CPC分类号： H04L27/2647 , H04L25/022 , H04L25/0248 , H04L25/03159 , H04L25/03821
摘要： The OFDM channel estimation and Inter-Carrier Interference (ICI) cancellation method uses a few pilots within Orthogonal Frequency Division Multiplexing (OFDM) systems in general, and mobile OFDM systems in particular. The frequency domain channel is estimated using an eigenvalue based model reduction technique with high accuracy. A Minimum Mean Square Error (MMSE) based Finite Impulse Response (FIR) equalizer is then used to obtain an ICI free estimate of the transmitted signal.
摘要翻译： OFDM信道估计和载波间干扰（ICI）消除方法通常在正交频分复用（OFDM）系统中使用几个导频，特别是移动OFDM系统。 使用基于特征值的模型降低技术来估计频域信道，其具有高精度。 然后使用基于最小均方误差（MMSE）的有限脉冲响应（FIR）均衡器来获得发射信号的无ICI估计。
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