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21. 发明申请

US20150043629A1 BLOCK TIME DOMAIN CHANNEL ESTIMATION IN OFDM SYSTEM 有权
标题翻译： OFDM系统中的块时域通道估计
公开(公告)号：US20150043629A1
公开(公告)日：2015-02-12
申请号：US14525024
申请日：2014-10-27
申请人： Acorn Technologies, Inc.
发明人： Steven C. Thompson , Fernando Lopez de Victoria
IPC分类号： H04L27/26 , H04L25/02
CPC分类号： H04L27/2695 , H04L25/0212 , H04L25/0218 , H04L25/022 , H04L25/0232 , H04L25/025
摘要： An OFDM receiver receives OFDM symbols in the frequency domain and comb filters and then punctures the OFDM symbols to leave symbols with actual pilot information and with null values at the data symbols. The receiver provides the punctured OFDM symbols to an OFDM symbol queue. A virtual pilot interpolator is coupled to the punctured OFDM symbol storage to generate virtual pilot information introduced to OFDM symbols. The interpolator may be a two dimensional Wiener filter. The receiver also includes a time domain channel estimator that processes a first OFDM symbol including virtual pilot information to generate a channel impulse response for the first OFDM symbol. A frequency equalizer equalizes the OFDM symbol in response to the channel impulse response for the first OFDM symbol.
摘要翻译： OFDM接收机接收频域中的OFDM符号和梳状滤波器，然后对OFDM符号进行穿孔，以留下具有实际导频信息的符号，并在数据符号处具有空值。接收机将穿孔的OFDM符号提供给OFDM符号队列。虚拟导频内插器耦合到穿孔的OFDM符号存储器，以产生引入OFDM符号的虚拟导频信息。内插器可以是二维维纳滤波器。接收机还包括时域信道估计器，处理包含虚拟导频信息的第一OFDM符号以产生第一OFDM符号的信道脉冲响应。频率均衡器响应于第一OFDM符号的信道脉冲响应来均衡OFDM符号。

22. 发明申请

US20150003542A1 CHANNEL ESTIMATION TECHNIQUE 有权
标题翻译：频道估算技术
公开(公告)号：US20150003542A1
公开(公告)日：2015-01-01
申请号：US13929355
申请日：2013-06-27
申请人： Oana-Elena BARBU , Guillaume Damien Andre MONGHAL , Christian ROM , Bernhard H. FLEURY , Niels Lovmand PEDERSEN , Carles NAVARRO MANCHON
发明人： Oana-Elena BARBU , Guillaume Damien Andre MONGHAL , Christian ROM , Bernhard H. FLEURY , Niels Lovmand PEDERSEN , Carles NAVARRO MANCHON
IPC分类号： H04L25/02
CPC分类号： H04L25/0202 , H04L5/0023 , H04L5/0048 , H04L25/0212 , H04L25/0218 , H04L25/022 , H04L25/0224 , H04L25/024
摘要： A method includes determining a sequence of first coefficient estimates of a communication channel based on a sequence of pilots arranged according to a known pilot pattern and based on a receive signal, wherein the receive signal is based on the sequence of pilots transmitted over the communication channel. The method further includes determining a sequence of second coefficient estimates of the communication channel based on a decomposition of the first coefficient estimates in a dictionary matrix and a sparse vector of the second coefficient estimates, the dictionary matrix including filter characteristics of at least one known transceiver filter arranged in the communication channel.
摘要翻译：一种方法包括：基于根据已知导频模式布置并基于接收信号的导频序列来确定通信信道的第一系数估计序列，其中接收信号基于通过通信信道发送的导频序列。该方法还包括基于字典矩阵中的第一系数估计和第二系数估计的稀疏向量的分解来确定通信信道的第二系数估计序列，字典矩阵包括至少一个已知收发器的滤波特性滤波器布置在通信信道中。

23. 发明申请

US20140226587A1 Method and Device for Denoising in Channel Estimation, and Corresponding Computer Program and Computer Readable Storage Medium 有权
标题翻译：信道估计中去噪的方法和装置，以及相应的计算机程序和计算机可读存储介质
公开(公告)号：US20140226587A1
公开(公告)日：2014-08-14
申请号：US14241968
申请日：2011-09-14
申请人： Zhixun Tang , Xie Li , Liping Zhang
发明人： Zhixun Tang , Xie Li , Liping Zhang
IPC分类号： H04W52/24
CPC分类号： H04W52/24 , H04L25/0206 , H04L25/0212 , H04L25/0216 , H04L25/0218 , H04L2025/03414
摘要： The embodiment of the invention discloses a method, device and computer program for denoising in channel estimation. The method comprises steps of: calculating a noise power value and a power value of each path in each user window based on a channel estimation result, the user window is referred to channel impulse response window corresponding to this user; calculating a denoising threshold factor based on the noise power value and the power value of each path in each user window; calculating a denoising threshold value based on the noise power value and the denoising threshold factor; and performing a denoising processing on the channel estimation result by using the denoising threshold value.
摘要翻译：本发明的实施例公开了一种用于在信道估计中进行去噪的方法，装置和计算机程序。该方法包括以下步骤：基于信道估计结果，计算每个用户窗口中的每个路径的噪声功率值和功率值，所述用户窗口参考与该用户对应的信道脉冲响应窗口; 基于每个用户窗口中的每个路径的噪声功率值和功率值来计算去噪阈值因子; 基于噪声功率值和去噪阈值因子计算去噪阈值; 以及通过使用去噪阈值对信道估计结果进行去噪处理。

24. 发明授权

US08325790B2 Equalization for OFDM communication 有权
标题翻译： OFDM通信均衡
公开(公告)号：US08325790B2
公开(公告)日：2012-12-04
申请号：US12534359
申请日：2009-08-03
申请人： Haim Primo , Yosef Stein , Wei An
发明人： Haim Primo , Yosef Stein , Wei An
IPC分类号： H03H7/00 , H04J11/00
CPC分类号： H04L25/0212 , H04L25/0218 , H04L25/03159 , H04L2025/03414 , H04L2025/03535 , H04L2025/03726
摘要： The problem of inefficient channel impulse-response processing is addressed by processing different parts of a channel impulse response to accurately locate channel taps, and to generate more than one set of equalization coefficients. This allows the most-suited equalization coefficient to be selected based on a selection criterion.
摘要翻译：通过处理信道脉冲响应的不同部分来精确地定位信道抽头并产生多于一组的均衡系数来解决低效率信道脉冲响应处理的问题。这允许基于选择标准来选择最合适的均衡系数。

25. 发明申请

US20120069753A1 CHANNEL ESTIMATION BASED ON MIDAMBLE 审中-公开
标题翻译：基于MIDAMBLE的信道估计
公开(公告)号：US20120069753A1
公开(公告)日：2012-03-22
申请号：US13175279
申请日：2011-07-01
申请人： Hari Sankar , Wenjun Li , Farrokh Abrishamkar , Srikanth Gummadi
发明人： Hari Sankar , Wenjun Li , Farrokh Abrishamkar , Srikanth Gummadi
IPC分类号： H04W24/00
CPC分类号： H04L25/0218 , H04L25/0228 , H04L25/024
摘要： Channel estimation at a user equipment includes estimating channel quality of at least one channel. A first algorithm or a second algorithm is selected based on the estimated channel quality. Channel estimation is performed based on the selected algorithm. The first algorithm may be a midamble multiplication-based algorithm. The second algorithm may be a midamble division algorithm. Channel estimation may also include estimating noise of a channel and adaptively setting a threshold based on the estimated noise to refine the channel estimation. The estimating channel quality, selecting of a first or second algorithm and channel estimation may be performed iteratively for contributing signals on a channel. An adaptive threshold may be modified across iterations. The channel estimation may also include determining a delay profile of a channel to refine the channel estimation.
摘要翻译：在用户设备处的信道估计包括估计至少一个信道的信道质量。基于估计的信道质量来选择第一算法或第二算法。基于选择的算法执行信道估计。第一种算法可以是基于midamble乘法的算法。第二种算法可以是中间码分割算法。信道估计还可以包括估计信道的噪声并且基于所估计的噪声自适应地设置阈值以改善信道估计。可以迭代地执行估计信道质量，第一或第二算法的选择和信道估计，以在信道上提供信号。可以跨迭代修改自适应阈值。信道估计还可以包括确定信道的延迟分布以细化信道估计。

26. 发明申请

US20110182340A1 OFDM CHANNEL ESTIMATION SYSTEM AND METHOD COMPONENTS 有权
公开(公告)号：US20110182340A1
公开(公告)日：2011-07-28
申请号：US13004313
申请日：2011-01-11
申请人： HAIM PRIMO , Yosef Stein , Wei An
发明人： HAIM PRIMO , Yosef Stein , Wei An
IPC分类号： H04B17/00
CPC分类号： H04L25/03038 , H04B17/345 , H04B17/364 , H04L25/0218 , H04L25/0228 , H04L25/025 , H04L25/03159 , H04L27/2647 , H04L2025/03414 , H04L2025/03783
摘要： Channel estimation for high mobility OFDM channels is achieved by identifying a set of channel path delays from an OFDM symbol stream including carrier data, inter-channel interference noise and channel noise; determining the average channel impulse response for the identified set of channel path delays in each symbol; generating a path delay curvature for each channel path delay in each symbol based on stored average channel impulse responses for the identified channel path delays; estimating the carrier data in the symbols in the OFDM symbol stream in the presence of inter-channel interference noise and channel noise from the OFDM symbol steam and the average impulse responses for the identified channel path delays; reconstructing the inter-channel interference noise in response to the path delay curvature, the identified set of channel path delays and estimated carrier data to produce a symbol stream of carrier data and channel noise with suppressed inter-channel interference noise.

27. 发明授权

US07974350B2 Propagation path estimation method and apparatus 有权
标题翻译：传播路径估计方法和装置
公开(公告)号：US07974350B2
公开(公告)日：2011-07-05
申请号：US11153191
申请日：2005-06-15
申请人： Makoto Yoshida
发明人： Makoto Yoshida
IPC分类号： H04K1/10 , H04L27/28
CPC分类号： H04L25/0218 , H04L25/022
摘要： In estimating propagation path in an OFDM receiver in an OFDM communication system, a CIR estimation unit estimates a group of impulse responses of a propagation path, a valid-impulse discriminator selects impulse responses (CIR), which are greater than a predetermined threshold value, from the impulse-response group, and a propagation path estimation unit generates a matrix expression using a CIR estimation vector that includes the selected CIRs as elements, a matrix S, which is decided based upon number N of points of an IFFT used in OFDM modulation and number Nc of subcarriers used in actual transmission, and a propagation-path response vector, obtains the propagation-path response vector by solving this matrix expression and estimating the propagation path.
摘要翻译：在OFDM通信系统中的OFDM接收机的估计传播路径中，CIR估计单元估计传播路径的一组脉冲响应，有效脉冲鉴别器选择大于预定阈值的脉冲响应（CIR）并且传播路径估计单元使用包括所选择的CIR作为元素的CIR估计向量生成矩阵表达式，矩阵S基于在OFDM调制中使用的IFFT的点数N来确定和实际发送中使用的子载波的数量Nc和传播路径响应向量，通过求解该矩阵表达式并估计传播路径来获得传播路径响应向量。

28. 发明申请

US20100150131A1 SIGNALING PARAMETERS CHANNEL PROCESSING 审中-公开
标题翻译：信号参数信道处理
公开(公告)号：US20100150131A1
公开(公告)日：2010-06-17
申请号：US12509820
申请日：2009-07-27
申请人： Krishna Kiran Mukkavilli , Ashok Mantravadi , Durk L. van Veen , Murali Ramaswamy Chari , Raghuraman Krishnamoorthi , Rajeev Krishnamurthi , Fuyun Ling
发明人： Krishna Kiran Mukkavilli , Ashok Mantravadi , Durk L. van Veen , Murali Ramaswamy Chari , Raghuraman Krishnamoorthi , Rajeev Krishnamurthi , Fuyun Ling
IPC分类号： H04J3/00 , H04J3/06
CPC分类号： H04L23/02 , H04L5/0053 , H04L25/0206 , H04L25/0218 , H04L25/023 , H04L27/2613 , H04L27/2647
摘要： In a multicasts wireless telecommunication system providing an aggregation of one or more independent data components as a flow, wherein the OIS is located at the latch point of the beginning of the superframe, and the OIS programming is latched at the superframe boundary, the improvement of deriving signal parameter information from Signaling Parameter Channel (SPC) symbols transmitted in a Forward Link only (FLO) network by deriving a time domain channel estimate by assuming each of the combinations for the signal parameter field in the scrambler seed and picking the signal parameter combination that yields the most energy in the time domain above a threshold value.
摘要翻译：在提供作为流的一个或多个独立数据组件的聚合的组播无线电信系统中，其中OIS位于超帧开始的锁存点处，并且OIS编程在超帧边界处被锁存，通过通过假设加扰器种子中的信号参数字段的每个组合并且选择信号参数组合来导出时域信道估计，从在仅前向链路（FLO）网络中发送的信令参数信道（SPC）符号中导出信号参数信息其在时域中产生的能量大于阈值以上。

29. 发明授权

US07711031B2 Adaptive technique for inter-carrier-interference canceling in OFDM systems 有权
标题翻译： OFDM系统中载波间干扰消除的自适应技术
公开(公告)号：US07711031B2
公开(公告)日：2010-05-04
申请号：US11766814
申请日：2007-06-22
申请人： Mirette Sadek , Nabil Yousef
发明人： Mirette Sadek , Nabil Yousef
IPC分类号： H04L27/30
CPC分类号： H04L25/0216 , H04L1/0047 , H04L1/0054 , H04L25/0218 , H04L25/022 , H04L25/0232 , H04L25/0236 , H04L25/0244 , H04L25/03038 , H04L25/03286 , H04L2025/03414 , H04L2025/03496 , H04L2025/03522 , H04L2025/03617
摘要： ICI canceling in an OFDM system includes taking a FFT of a wireless electrical signal to produce an OFDM signal; estimating a DC component of a frequency-selective channel in the OFDM system; obtaining an initial estimate of data symbols associated with data bits of the OFDM signal; correcting the data bits with a Viterbi decoder; encoding the corrected data bits to acquire corrected data symbols; re-estimating the DC component of the frequency-selective channel using the corrected data symbols; filtering the corrected data symbols and sub-carrier of the frequency-selective channel; calculating a first order differential function of the frequency-selective channel based on successive ones of the corrected data symbols; removing an ICI component from the calculated first order differential function; and re-estimating the data symbols as a function of the removed ICI component. The filtering occurs using a low pass filter comprising a bank of eight filters.
摘要翻译： OFDM系统中的ICI取消包括对无线电信号进行FFT以产生OFDM信号; 估计所述OFDM系统中的频率选择信道的直流分量; 获得与所述OFDM信号的数据比特相关联的数据符号的初始估计; 用维特比解码器校正数据位; 编码校正的数据位以获取校正的数据符号使用校正的数据符号重新估计频率选择信道的DC分量; 对频率选择信道的校正数据符号和子载波进行滤波; 基于经校正的数据符号中的连续的一个，计算频率选择信道的一阶微分函数; 从计算的一阶微分函数中去除ICI分量; 并重新估计作为所移除的ICI分量的函数的数据符号。使用包括八个滤波器组的低通滤波器进行滤波。

30. 发明申请

US20100020855A1 CONTROL APPARATUS FOR AND CONTROL METHOD OF EQUALIZER, AND WIRELESS TERMINAL HAVING THAT CONTROL APPARATUS 有权
标题翻译：均衡器的控制装置和控制方法，以及具有控制装置的无线终端
公开(公告)号：US20100020855A1
公开(公告)日：2010-01-28
申请号：US12574954
申请日：2009-10-07
申请人： Akira ITO , Tsuyoshi HASEGAWA
发明人： Akira ITO , Tsuyoshi HASEGAWA
IPC分类号： H04B1/707 , H03H7/30 , H04L27/00
CPC分类号： H04L25/03038 , H04B1/712 , H04L25/0202 , H04L25/0218 , H04L25/03292
摘要： A channel estimation value of each path timing is determined, a path timing, the channel estimation value of which is to be set to zero, is determined based on a reception power of each path timing and a predetermined power threshold (P0), and a channel estimation value of the detected path timing to zero.
摘要翻译：确定每个路径定时的信道估计值，根据每个路径定时和预定功率阈值（P0）的接收功率来确定将其信道估计值设置为零的路径定时，以及检测路径定时的信道估计值为零。

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