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公开(公告)号：US09268025B2
公开(公告)日：2016-02-23
申请号：US13570771
申请日：2012-08-09
IPC分类号： G01S19/30 , G01S19/37 , H04B1/709 , H04B1/7105 , H04N19/60
CPC分类号： G01S19/30 , G01S19/37 , H04B1/709 , H04B1/71052 , H04N19/60
摘要： An offset estimator (e.g., a time delay, a spatial image offset, etc.) makes use of a transform approach (e.g., using Fast Fourier Transforms). The sparse nature of a cross-correlation is exploited by limiting the computation required in either or both of the forward and inverse transforms. For example, only a subset of the transform values (e.g., a regular subsampling of the values) is used. In some examples, an inverse transform yields a time aliased version of the cross-correlation. Further processing then identifies the most likely offset of the original signals by considering offsets that are consistent with the aliased output.
摘要翻译： 偏移估计器（例如，时间延迟，空间图像偏移等）利用变换方法（例如，使用快速傅里叶变换）。 通过限制正向和反向变换中的任一个或两者所需的计算来利用互相关的稀疏性质。 例如，仅使用变换值的子集（例如，值的常规二次抽样）。 在一些示例中，逆变换产生互相关的时间混叠版本。 然后，进一步的处理通过考虑与混叠输出一致的偏移来识别原始信号的最可能的偏移。
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公开(公告)号：US09083417B2
公开(公告)日：2015-07-14
申请号：US13991708
申请日：2011-12-02
申请人： Zhixun Tang , Liang Zhuang
发明人： Zhixun Tang , Liang Zhuang
IPC分类号： H03H7/30 , H04B1/10 , H04B1/7105 , H04B1/7107
CPC分类号： H04B1/10 , H04B1/71052 , H04B1/7107 , H04B2201/709736
摘要： An interference cancellation method performed by a receiver includes: determining a strong interference code channel among all code channels that carry a received signal, and determining a signal that corresponds to the strong interference code channel to be a strong interference signal, wherein the received signal has been matched filtered. The method further includes obtaining a reconstructed strong interference signal based on the determined strong interference signal and using a system matrix, performing the interference cancellation for the received signal using the reconstructed strong interference signal, to obtain the signal without interference. The strong interference signal can be reconstructed using the system matrix, and the interference cancellation can be performed for the received signal using the reconstructed strong interference signal. The complexity of inverting the matrix is reduced and the performance is enhanced by reducing the order of the matrix, and thus increasing the efficiency of cancelling the interference.
摘要翻译： 由接收机执行的干扰消除方法包括：确定携带接收信号的所有码信道中的强干扰码信道，并将与强干扰码信道相对应的信号确定为强干扰信号，其中接收信号具有 被匹配过滤。 该方法还包括基于所确定的强干扰信号并使用系统矩阵获得重构的强干扰信号，使用重建的强干扰信号对接收信号执行干扰消除，以获得无干扰的信号。 可以使用系统矩阵重建强干扰信号，并且可以使用重构的强干扰信号对接收信号执行干扰消除。 减少矩阵反转的复杂度，通过降低矩阵的顺序来提高性能，从而提高消除干扰的效率。
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公开(公告)号：US20150188604A1
公开(公告)日：2015-07-02
申请号：US14590540
申请日：2015-01-06
IPC分类号： H04B1/7103 , H04W72/04
CPC分类号： H04B1/7103 , H04B1/71052 , H04B2201/709709 , H04L25/03114 , H04L2025/03414 , H04W72/0453 , H04W88/085
摘要： An exemplary wireless communication network that includes a base that communicates with remote units located in a cell of the network. The base concatenates information symbols with a preamble corresponding to a destination remote unit. One or more remote units communicating with the base each concatenates information symbols with a preamble corresponding to that remote unit. An adaptive receiver system for a base unit rapidly adapts optimal despreading weights for reproducing information symbols transmitted from multiple remote units. A transmitter system for a base unit concatenates information symbols with a preamble associated with a remote unit in the cell. An adaptive receiver system for a remote unit in a communication network rapidly adapts optimal weights for reproducing a signal transmitted to it by a specific base unit in the network.
摘要翻译： 一种示例性无线通信网络，其包括与位于网络的小区中的远程单元进行通信的基站。 基站将信息符号与与目的地远程单元相对应的前导码级连接。 与基站通信的一个或多个远程单元将信息符号与与该远程单元相对应的前导码级联。 用于基本单元的自适应接收机系统快速地适配用于再现从多个远程单元发送的信息符号的最优解扩加权。 用于基本单元的发射机系统将信息符号与与小区中的远程单元相关联的前导码级联。 用于通信网络中的远程单元的自适应接收机系统快速地适应用于再现由网络中的特定基本单元发送给它的信号的最佳权重。
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公开(公告)号：US08615030B2
公开(公告)日：2013-12-24
申请号：US12435039
申请日：2009-05-04
IPC分类号： H04B1/7105
CPC分类号： H04B1/71052
摘要： Systems and methods for multi-user detection are provided. In one aspect of the disclosure, an apparatus is provided. The apparatus comprises a processing unit configured to process a plurality of received chips into a plurality of received symbols for a plurality of users. The apparatus further comprises a computation unit configured to compute a multi-user matrix relating a plurality of user symbols for the plurality of users to the plurality of received symbols and a detection unit configured to detect the plurality of user symbols for the plurality of users using the computed multi-user matrix and the plurality of received symbols.
摘要翻译： 提供了多用户检测的系统和方法。 在本公开的一个方面，提供一种装置。 该装置包括：处理单元，被配置为将多个接收到的码片处理为多个用户的多个接收符号。 所述装置还包括计算单元，被配置为计算将所述多个用户的多个用户符号与所述多个接收到的符号相关联的多用户矩阵;以及检测单元，被配置为使用所述多个用户矩阵来检测所述多个用户的所述多个用户符号 所计算的多用户矩阵和多个接收符号。
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5.发明申请Adaptive Communications Methods for Multiple User Packet Radio Wireless Networks 有权多用户分组无线电无线网络的自适应通信方法公开(公告)号：US20120320834A1
公开(公告)日：2012-12-20
申请号：US13597205
申请日：2012-08-28
IPC分类号： H04W88/08
CPC分类号： H04B1/7103 , H04B1/71052 , H04B2201/709709 , H04L25/03114 , H04L2025/03414 , H04W72/0453 , H04W88/085
摘要： An exemplary wireless communication network that includes a base that communicates with remote units located in a cell of the network. The base concatenates information symbols with a preamble corresponding to a destination remote unit. One or more remote units communicating with the base each concatenates information symbols with a preamble corresponding to that remote unit. An adaptive receiver system for a base unit rapidly adapts optimal despreading weights for reproducing information symbols transmitted from multiple remote units. A transmitter system for a base unit concatenates information symbols with a preamble associated with a remote unit in the cell. An adaptive receiver system for a remote unit in a communication network rapidly adapts optimal weights for reproducing a signal transmitted to it by a specific base unit in the network.
摘要翻译： 一种示例性无线通信网络，其包括与位于网络的小区中的远程单元进行通信的基站。 基站将信息符号与与目的地远程单元相对应的前导码级连接。 与基站通信的一个或多个远程单元将信息符号与与该远程单元相对应的前导码级联。 用于基本单元的自适应接收机系统快速地适配用于再现从多个远程单元发送的信息符号的最优解扩加权。 用于基本单元的发射机系统将信息符号与与小区中的远程单元相关联的前导码级联。 用于通信网络中的远程单元的自适应接收机系统快速地适应用于再现由网络中的特定基本单元发送给它的信号的最佳权重。
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公开(公告)号：US08295383B2
公开(公告)日：2012-10-23
申请号：US12524065
申请日：2008-01-09
申请人： Shousei Yoshida , Masayuki Kimata
发明人： Shousei Yoshida , Masayuki Kimata
IPC分类号： H04B7/02
CPC分类号： H04B7/0854 , H04B1/71052 , H04B1/712 , H04L25/0228 , H04L25/03159 , H04L27/2647 , H04L2025/03414
摘要： A receiving apparatus is provided in which a single carrier signal is received by a plurality of receiving antennas, and multipath equalization and other cell interference suppression are carried out in a frequency domain at a same time. A plurality of antennas 1-1 to 1-N receives the single carrier signal. The DFT sections 3-1 to 3-N converts the reception signals into frequency domain signals. A channel estimating section 5 estimates a channel gain of a desired user signal by using pilot reception signals. An interference correlation matrix estimating section 6 estimates an interference correlation matrix from the pilot reception signals and a channel estimation value. A weight calculating section. A weight calculating section 7 receives the channel estimates and the interference correlation matrix and calculates equalization weights. An equalizing section 8 performs multipath equalization and other cell interference suppression to the desired user signal in a frequency domain. An IDFT section 9 converts an equalization signal into a signal in a time domain.
摘要翻译： 提供一种接收装置，其中单个载波信号被多个接收天线接收，并且同时在频域中执行多径均衡和其他小区干扰抑制。 多个天线1-1至1-N接收单载波信号。 DFT部3-1〜3-N将接收信号变换为频域信号。 信道估计部分5通过使用导频接收信号来估计所需用户信号的信道增益。 干扰相关矩阵估计部分6从导频接收信号和信道估计值估计干扰相关矩阵。 权重计算部分。 权重计算部分7接收信道估计和干扰相关矩阵并计算均衡权重。 均衡部分8对频域中的期望用户信号执行多径均衡和其他小区干扰抑制。 IDFT部分9将均衡信号转换成时域中的信号。
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7.发明授权Adaptive communications methods for multiple user packet radio wireless networks 有权多用户分组无线电无线网络的自适应通信方法公开(公告)号：US08254241B2
公开(公告)日：2012-08-28
申请号：US11532857
申请日：2006-09-18
IPC分类号： H04J9/00
CPC分类号： H04B1/7103 , H04B1/71052 , H04B2201/709709 , H04L25/03114 , H04L2025/03414 , H04W72/0453 , H04W88/085
摘要： An exemplary wireless communication network that includes a base that communicates with remote units located in a cell of the network. A base concatenates information symbols with a preamble corresponding to a destination remote unit. One or more remote units communicating with a base each concatenates information symbols with a preamble corresponding to that remote unit. An adaptive receiver system for a base unit rapidly adapts optimal despreading weights for reproducing information symbols transmitted from multiple remote units. A transmitter system for a base unit concatenates information symbols with a preamble associated with a remote unit in the cell. An adaptive receiver system for a remote unit in a communication network rapidly adapts optimal weights for reproducing a signal transmitted to it by a specific base unit in the network. A transmitter system for a remote unit in a cell of a communication network which concatenates information symbols with preamble associated with the remote unit. A base initiates communication with a desired remote unit by transmitting an initiation codeword in a selected entry slot. One or more remote units each initiates communication with a base by transmitting an initiation codeword associated with the remote unit in a selected entry slot. A remote unit synchronizes in time and frequency to the base using a sequence of synchronization signals transmitted by the base in a number of entry slots.
摘要翻译： 一种示例性无线通信网络，其包括与位于网络的小区中的远程单元进行通信的基站。 基站将信息符号与与目的地远程单元相对应的前导码级连接。 与基站通信的一个或多个远程单元将信息符号与对应于该远程单元的前导码级联。 用于基本单元的自适应接收机系统快速地适配用于再现从多个远程单元发送的信息符号的最优解扩加权。 用于基本单元的发射机系统将信息符号与与小区中的远程单元相关联的前导码级联。 用于通信网络中的远程单元的自适应接收机系统快速地适应用于再现由网络中的特定基本单元发送给它的信号的最佳权重。 用于通信网络的小区中的远程单元的发射机系统，其将信息符号与与远程单元相关联的前导码级联。 基站通过在所选择的入口时隙中发送启动码字来发起与期望的远程单元的通信。 一个或多个远程单元各自通过在所选择的入口时隙中发送与远程单元相关联的起始码字来发起与基站的通信。 远程单元使用基站在多个入口时隙中发送的同步信号序列在时间和频率上同步到基站。
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8.发明授权Method and apparatus for improved channel estimation for communications signal processing 有权用于通信信号处理改进信道估计的方法和装置公开(公告)号：US07929629B2
公开(公告)日：2011-04-19
申请号：US12027492
申请日：2008-02-07
申请人： Douglas A. Cairns
发明人： Douglas A. Cairns
CPC分类号： H04L25/0246 , H04B1/71052 , H04B1/712 , H04B2201/70701 , H04B2201/709727 , H04L25/0224
摘要： Teachings presented herein present a “whitening” channel estimation method and apparatus that produce high-quality net channel estimates for processing a received signal, such as a received CDMA signal. Processing includes forming an initial least squares problem (for medium channel estimates) using known pilot values and corresponding pilot observations for the received signal, transforming the initial least squares problem using a whitening transformation term, and solving the transformed least squares problem to obtain whitened medium channel estimates. The whitening transformation term may be determined, for example, by carrying out a Cholesky factorization of a (traffic) data correlation matrix, which can be obtained from traffic data values for the received signal. Processing further includes converting the whitened medium channel estimates into whitened net channel estimates, which consider the effects of transmit/receive filtering.
摘要翻译： 本文提出的教导提供了一种“白化”信道估计方法和装置，其产生用于处理诸如接收的CDMA信号的接收信号的高质量净信道估计。 处理包括使用已知导频值和接收信号的相应导频观测形成初始最小二乘问题（对于中等信道估计），使用白化变换项变换初始最小二乘问题，并求解变换最小二乘问题以获得白化介质 渠道估计。 白化变换项可以例如通过执行可以从接收信号的业务数据值获得的（业务）数据相关矩阵的Cholesky分解来确定。 处理进一步包括将白化的介质信道估计转换为白化净信道估计，其考虑发射/接收滤波的影响。
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9.发明申请公开(公告)号：US20100278217A1
公开(公告)日：2010-11-04
申请号：US12435039
申请日：2009-05-04
CPC分类号： H04B1/71052
摘要： Systems and methods for multi-user detection are provided. In one aspect of the disclosure, an apparatus is provided. The apparatus comprises a processing unit configured to process a plurality of received chips into a plurality of received symbols for a plurality of users. The apparatus further comprises a computation unit configured to compute a multi-user matrix relating a plurality of user symbols for the plurality of users to the plurality of received symbols and a detection unit configured to detect the plurality of user symbols for the plurality of users using the computed multi-user matrix and the plurality of received symbols.
摘要翻译： 提供了多用户检测的系统和方法。 在本公开的一个方面，提供一种装置。 该装置包括：处理单元，被配置为将多个接收到的码片处理为多个用户的多个接收符号。 所述装置还包括计算单元，被配置为计算将所述多个用户的多个用户符号与所述多个接收到的符号相关联的多用户矩阵;以及检测单元，被配置为使用所述多个用户矩阵来检测所述多个用户的所述多个用户符号 所计算的多用户矩阵和多个接收符号。
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10.发明申请公开(公告)号：US20100278035A1
公开(公告)日：2010-11-04
申请号：US12435114
申请日：2009-05-04
申请人： Wenjun Li , Yingqun Yu , Farrokh Abrishamkar , Divaydeep Sikri , Insung Kang
发明人： Wenjun Li , Yingqun Yu , Farrokh Abrishamkar , Divaydeep Sikri , Insung Kang
IPC分类号： H04J11/00
CPC分类号： H04B1/71052
摘要： Systems and methods for multi-user detection in a multiple access system are provided. In one aspect, an apparatus is provided. The apparatus comprises a processing unit configured to process received chips into received symbols for a plurality of users and a computation unit configured to compute a multi-user matrix using a Hadamard matrix, wherein the multi-user matrix relates user symbols for the plurality of users to the received symbols. The apparatus further comprises a detection unit configured to detect the user symbols for the plurality of users using the received symbols and the computed multi-user matrix.
摘要翻译： 提供了一种用于多访问系统中多用户检测的系统和方法。 一方面，提供了一种装置。 该装置包括：处理单元，被配置为将接收到的码片处理为多个用户的接收符号;以及计算单元，被配置为使用哈达玛矩阵来计算多用户矩阵，其中多用户矩阵与多个用户的用户符号相关 到收到的符号。 所述装置还包括检测单元，被配置为使用所接收的符号和所计算的多用户矩阵来检测所述多个用户的用户符号。
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