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    • 1. 发明授权
    • Quantization method for OFDM
    • OFDM的量化方法
    • US08781007B2
    • 2014-07-15
    • US13580371
    • 2010-11-09
    • Wei ShiAndrei Popescu
    • Wei ShiAndrei Popescu
    • H04K1/10
    • H04L27/2626
    • A quantization method for OFDM is described. In an embodiment, the method uses an objective function which is defined as a function of the quantization error of the OFDM signal in frequency summed over data subcarriers. A search algorithm is used to optimize the objective function and the solution found is quantized by rounding. The quantized value of the solution may then be fed back into the objective function to compute a value of that function and if the value is less than the value computed in a previous iteration of the method, the method is repeated using the quantized value of the solution as the new starting point for the search algorithm. If the value of the function is, however, not less than the value computed in a previous iteration, the new solution is discarded and the quantized value of the solution from the previous iteration is output.
    • 描述OFDM的量化方法。 在一个实施例中,该方法使用被定义为在数据子载波上求和的频率中的OFDM信号的量化误差的函数的目标函数。 使用搜索算法来优化目标函数,并且通过舍入来量化解决方案。 然后,解的量化值可以反馈到目标函数中以计算该函数的值,并且如果该值小于该方法的先前迭代中计算的值,则使用该方法的量化值来重复该方法 解决方案作为搜索算法的新起点。 但是,如果该函数的值不小于在先前迭代中计算的值,则会丢弃新的解,并输出前一次迭代中的解的量化值。
    • 2. 发明申请
    • QUANTIZATION METHOD FOR OFDM
    • OFDM的量化方法
    • US20120314788A1
    • 2012-12-13
    • US13580371
    • 2010-11-09
    • Wei ShiAndrei Popescu
    • Wei ShiAndrei Popescu
    • H04J11/00
    • H04L27/2626
    • A quantization method for OFDM is described. In an embodiment, the method uses an objective function which is defined as a function of the quantization error of the OFDM signal in frequency summed over data subcarriers. A search algorithm is used to optimize the objective function and the solution found is quantized by rounding. The quantized value of the solution may then be fed back into the objective function to compute a value of that function and if the value is less than the value computed in a previous iteration of the method, the method is repeated using the quantized value of the solution as the new starting point for the search algorithm. If the value of the function is, however, not less than the value computed in a previous iteration, the new solution is discarded and the quantized value of the solution from the previous iteration is output.
    • 描述OFDM的量化方法。 在一个实施例中,该方法使用被定义为在数据子载波上求和的频率中的OFDM信号的量化误差的函数的目标函数。 使用搜索算法来优化目标函数,并且通过舍入来量化解决方案。 然后,解的量化值可以反馈到目标函数中以计算该函数的值,并且如果该值小于该方法的先前迭代中计算的值,则使用该方法的量化值来重复该方法 解决方案作为搜索算法的新起点。 但是,如果该函数的值不小于在先前迭代中计算的值,则会丢弃新的解,并输出前一次迭代中的解的量化值。
    • 3. 发明授权
    • FM receiver noise reduction
    • FM接收机降噪
    • US09203454B2
    • 2015-12-01
    • US13510571
    • 2010-11-16
    • Jacob SharpeAndrei Popescu
    • Jacob SharpeAndrei Popescu
    • H04B1/16H04B1/3805H04B15/06
    • H04B1/1676H04B1/3805H04B15/06
    • Apparatus to reduce noise in a stereo FM broadcast received via an antenna, the apparatus comprising: a frequency translator configured to translate the received stereo FM broadcast to an intermediate carrier frequency, a demodulation unit configured to demodulate the translated FM signal so as to form left-plus-right and left-minus-right AM signals, a filter configured to form a filtered signal by filtering one of the AM signals, so as to suppress a sub-band of that signal containing unwanted tones, a summing unit for summing the filtered signal and the other of the left-plus-right and left-minus-right signals to produce a stereo audio signal.
    • 一种用于减少通过天线接收的立体声FM广播中的噪声的装置,该装置包括:频率转换器,被配置为将所接收的立体声FM广播转换为中间载波频率;解调单元,被配置为解调经翻译的FM信号以形成左 - 左右右AM信号,滤波器,被配置为通过对AM信号之一进行滤波来形成滤波信号,以便抑制包含不需要的音调的信号的子带,求和单元 滤波后的信号和左右右右信号中的另一个产生立体声音频信号。
    • 8. 发明授权
    • Multiple-input, multiple-output telecommunications schemes
    • 多输入多输出电信方案
    • US08654877B2
    • 2014-02-18
    • US13179178
    • 2011-07-08
    • Fei TongAndrei Popescu
    • Fei TongAndrei Popescu
    • H04B7/02
    • H04B7/0617H04B7/0663
    • This disclosure concerns beam-forming vectors and beam-forming matrices for multiple-input, multiple-output (MIMO) communications systems. These systems, from the method perspective, provide, according to one embodiment, a method of feeding back, to a transmitter from a receiver in a MIMO communications system, at least part of a beam-forming vector of a beam-forming matrix, wherein: the vector relates to a spatial stream of the MIMO system; the vector comprises a series of elements; each element specifies a beam-forming weight for a respective transmit antenna of the transmitter; and the method comprises: calculating a scaling factor that would scale a first element of the vector to a value of one; scaling the other element or elements of the vector with the scaling factor; and feeding back the scaled other element or elements to the transmitter to inform a beam-forming process. These systems, from the method perspective, provide, according to another embodiment, a method of processing a beam-forming matrix, wherein: the beam-forming matrix is for adjusting signals that are to issue from the transmit antennae of a MIMO communications system; the MIMO communications system comprises a transmitter and a receiver; the beam-forming matrix is capable of being decomposed into a series of beam-forming vectors; each beam-forming vector relates to a spatial stream of the MIMO system; each beam-forming vector comprises a series of elements; each element specifies a beam-forming weight for a transmit antenna of the transmitter; and the method comprises: obtaining a beam-forming matrix in which the elements are quantized; and orthogonalizing the beam-forming vectors with respect to one another.
    • 本公开涉及用于多输入多输出(MIMO)通信系统的波束成形矢量和波束形成矩阵。 从方法角度来看,这些系统根据一个实施例提供了一种从MIMO通信系统中的接收机向发射机反馈波束形成矩阵的波束形成向量的至少一部分的方法,其中 :该矢量涉及MIMO系统的空间流; 矢量包括一系列元素; 每个元素规定发射机的相应发射天线的波束成形权重; 并且所述方法包括:计算将所述向量的第一元素缩放为1的缩放因子; 用缩放因子缩放矢量的其他元素; 并将缩放的其他元件反馈到发射器以通知波束形成过程。 根据另一实施例,这些系统从方法的角度提供了一种处理波束成形矩阵的方法,其中:波束形成矩阵用于调整从MIMO通信系统的发射天线发出的信号; MIMO通信系统包括发射机和接收机; 波束形成矩阵能够被分解成一系列波束形成矢量; 每个波束形成向量涉及MIMO系统的空间流; 每个波束形成矢量包括一系列元件; 每个元素规定发射机发射天线的波束成形权重; 并且该方法包括:获得元素被量化的波束形成矩阵; 并且使波束形成向量相对于彼此正交化。
    • 9. 发明申请
    • MULTIPLE-INPUT, MULTIPLE-OUTPUT TELECOMMUNICATIONS SCHEMES
    • 多输入多输出电信方案
    • US20130010884A1
    • 2013-01-10
    • US13179178
    • 2011-07-08
    • Fei TONGAndrei Popescu
    • Fei TONGAndrei Popescu
    • H04B7/02
    • H04B7/0617H04B7/0663
    • This disclosure concerns beam-forming vectors and beam-forming matrices for multiple-input, multiple-output (MIMO) communications systems. These systems, from the method perspective, provide, according to one embodiment, a method of feeding back, to a transmitter from a receiver in a MIMO communications system, at least part of a beam-forming vector of a beam-forming matrix, wherein: the vector relates to a spatial stream of the MIMO system; the vector comprises a series of elements; each element specifies a beam-forming weight for a respective transmit antenna of the transmitter; and the method comprises: calculating a scaling factor that would scale a first element of the vector to a value of one; scaling the other element or elements of the vector with the scaling factor; and feeding back the scaled other element or elements to the transmitter to inform a beam-forming process. These systems, from the method perspective, provide, according to another embodiment, a method of processing a beam-forming matrix, wherein: the beam-forming matrix is for adjusting signals that are to issue from the transmit antennae of a MIMO communications system; the MIMO communications system comprises a transmitter and a receiver; the beam-forming matrix is capable of being decomposed into a series of beam-forming vectors; each beam-forming vector relates to a spatial stream of the MIMO system; each beam-forming vector comprises a series of elements; each element specifies a beam-forming weight for a transmit antenna of the transmitter; and the method comprises: obtaining a beam-forming matrix in which the elements are quantised; and orthogonalising the beam-forming vectors with respect to one another.
    • 本公开涉及用于多输入多输出(MIMO)通信系统的波束成形矢量和波束形成矩阵。 从方法角度来看,这些系统根据一个实施例提供了一种从MIMO通信系统中的接收机向发射机反馈波束形成矩阵的波束形成向量的至少一部分的方法,其中 :该矢量涉及MIMO系统的空间流; 矢量包括一系列元素; 每个元素规定发射机的相应发射天线的波束成形权重; 并且所述方法包括:计算将所述向量的第一元素缩放为1的缩放因子; 用缩放因子缩放矢量的其他元素; 并将缩放的其他元件反馈到发射器以通知波束形成过程。 根据另一实施例,这些系统从方法的角度提供了一种处理波束成形矩阵的方法,其中:波束形成矩阵用于调整从MIMO通信系统的发射天线发出的信号; MIMO通信系统包括发射机和接收机; 波束形成矩阵能够被分解成一系列波束形成矢量; 每个波束形成向量涉及MIMO系统的空间流; 每个波束形成矢量包括一系列元件; 每个元素规定发射机发射天线的波束成形权重; 并且该方法包括:获得元素被量化的波束形成矩阵; 并且相对于彼此正交化波束形成向量。
    • 10. 发明申请
    • Web page title shortening
    • 网页标题缩短
    • US20070006074A1
    • 2007-01-04
    • US11171508
    • 2005-06-30
    • Virpi RotoElina VartiainenAndrei PopescuGuido GrasselSalla MyllylaMika Rautava
    • Virpi RotoElina VartiainenAndrei PopescuGuido GrasselSalla MyllylaMika Rautava
    • G06F17/00G06F15/00
    • G06F17/30905
    • A method for shortening a web page title. The method includes determining if a title of a current web page fits in a title display area of a display. If the title fits the title is displayed in the title area. If the title does not fit, it is determined if the title of the current web page starts with a same word as a title of a previous page. If the title of the current web page starts with the same word, at least one word is removed from a beginning portion of the title of the current page that is in common with the title of the previous page, until the title of the current page fits in the title display area, or there are no more common words in the beginning of the title. End words or letters or end words can be removed until the title fits. Missing words may be indicated by adding a predetermined indicator in the area of the missing or removed words.
    • 一种缩短网页标题的方法。 该方法包括确定当前网页的标题是否适合显示器的标题显示区域。 如果标题符合标题,则会显示在标题区域中。 如果标题不合适,则确定当前网页的标题是否以与前一页的标题相同的单词开头。 如果当前网页的标题以相同的单词开始,则至少一个词从当前页面的标题的起始部分被删除,该标题与前一页面的标题相同,直到当前页面的标题 适合标题显示区域,或在标题开头没有更多的常用单词。 结束单词或字母或结束单词可以删除,直到标题适合。 可以通过在缺失或删除的单词的区域中添加预定指示符来指示缺失的单词。