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公开(公告)号：US08929435B2
公开(公告)日：2015-01-06
申请号：US12599391
申请日：2008-05-16
IPC分类号： H04N7/12 , H04N19/61 , H04N19/172 , H04N19/176 , H03M13/00 , H03M13/03 , H03M13/09
摘要： New capabilities will allow conventional broadcast transmission to be available to mobile devices. A method is described including receiving a data set, extracting a subset, encoding the subset using a first encoding process, combining the encoded subset with the remaining portion, and encoding the combined data set including the appended subset using a second encoding process. an apparatus is described including means for extracting a subset, means for first encoding, means for combining, and means for second encoding. An apparatus for decoding includes a data identifier receiving a data set and identifying a subset of data, a first decoder decoding the subset using a first decoding process, and a second decoder combining the subset of data with a remaining portion of the data set and decoding the combined data using a second decoding process. A method for decoding is also described.
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2.发明授权公开(公告)号：US07885325B2
公开(公告)日：2011-02-08
申请号：US11547937
申请日：2005-04-08
IPC分类号： H03H7/30
CPC分类号： H04L25/03057 , H04L7/0062 , H04L25/0212 , H04L2025/0342 , H04L2025/0349
摘要： A method of synchronizing a feedforward filter (46) that receives a signal resulting from the transmission of a series of symbols through a channel, wherein the series of symbols includes a predetermined sequence of symbols includes the step of developing a plurality of samples from the received symbols (60), wherein a sequence of samples corresponds to the predetermined sequence of symbols. The method further includes the steps of estimating a channel impulse response from the plurality of samples, calculating a characteristic of the channel impulse response, and synchronizing (54) the feedforward filter in accordance with the estimated channel impulse response.
摘要翻译： 一种同步前馈滤波器（46）的方法，所述前馈滤波器（46）通过信道接收由一系列符号的传输产生的信号，其中所述一系列符号包括预定的符号序列包括从接收到的多个样本开发多个样本的步骤 符号（60），其中样本序列对应于所述预定符号序列。 该方法还包括以下步骤：估计来自多个样本的信道脉冲响应，计算信道脉冲响应的特性，以及根据所估计的信道脉冲响应来同步（54）前馈滤波器。
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公开(公告)号：US20100246664A1
公开(公告)日：2010-09-30
申请号：US12599757
申请日：2008-05-16
CPC分类号： H04N7/50 , H03M13/00 , H03M13/03 , H03M13/09 , H03M13/095 , H03M13/096 , H03M13/134 , H03M13/151 , H03M13/253 , H03M13/2906 , H03M13/41 , H03M13/6356 , H03M13/6362 , H03M13/6538 , H04L1/005 , H04L1/0065 , H04L1/0072 , H04L1/0079 , H04N7/52 , H04N19/156 , H04N19/157 , H04N19/172 , H04N19/176 , H04N19/61
摘要： New capabilities will allow conventional broadcast transmission to be available to mobile devices. A method is described including the steps of receiving data, encoding the data using a first encoding process, inserting training data into the encoded data, and encoding the encoded data and the training data using a second encoding process. An apparatus is also described including a first encoder receiving at least a portion of data and encoding the portion of data using a first encoding process, a training data inserter inserting training data into the first encoded data, and a second encoder encoding the first encoded data and the training data using a second encoding process.
摘要翻译： 新功能将允许传统的广播传输可用于移动设备。 描述了一种方法，其包括以下步骤：接收数据，使用第一编码处理对数据进行编码，将训练数据插入到编码数据中，以及使用第二编码处理对编码数据和训练数据进行编码。 还描述了一种装置，其包括第一编码器，其接收数据的至少一部分并使用第一编码处理对数据的一部分进行编码，训练数据插入器将训练数据插入到第一编码数据中，以及编码第一编码数据的第二编码器 以及使用第二编码处理的训练数据。
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公开(公告)号：US07305026B1
公开(公告)日：2007-12-04
申请号：US09545597
申请日：2000-04-07
CPC分类号： H04L25/03159
摘要： An equalizer for processing blocks of data includes n−1 data shifters, n finite filters, an adder, and a controller. Each of the n−1 data shifters shifts the blocks of data. One of the n finite filters applies a corresponding set of finite filter coefficients to the blocks of data, and each of the other n−1 finite filters applies a set of finite filter coefficients to a corresponding output of the n−1 data shifters. Ghosts of the blocks of data are not eliminated as a result of the application of the n sets of finite filter coefficients corresponding to the n finite filters, and n>2. The adder is arranged to add outputs from the n finite filters. The controller is arranged to control the sets of finite filter coefficients corresponding to the n finite filters so that the addition performed by the adder substantially eliminates the ghosts.
摘要翻译： 用于处理数据块的均衡器包括n-1个数据移位器，n个有限滤波器，加法器和控制器。 每个n-1个数据移位器移动数据块。 n个有限滤波器中的一个将有限滤波器系数的一组应用于数据块，并且其他n-1个有限滤波器中的每一个将一组有限滤波器系数应用于n-1个数据移位器的相应输出。 由于应用与n个有限滤波器相对应的n组有限滤波器系数，并且n> 2，所以数据块的Ghost不被消除。 加法器被布置成从n个有限滤波器加上输出。 控制器被设置为控制与n个有限滤波器相对应的有限滤波器系数的集合，使得由加法器执行的加法器基本上消除了重影。
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公开(公告)号：US07072392B2
公开(公告)日：2006-07-04
申请号：US10007999
申请日：2001-11-13
IPC分类号： H03H7/30
CPC分类号： H04L25/03057 , H04L2025/0349
摘要： A digital equalizer comprises a matched filter that, in conjunction with an FIR filter, assures a single peak with substantially greater energy than other peaks caused by ghosts, thereby permitting synchronization even with multiple, arbitrarily strong ghosts caused by strong multipathing, multiple transmitters, or both.
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6.发明授权公开(公告)号：US06829297B2
公开(公告)日：2004-12-07
申请号：US09875720
申请日：2001-06-06
IPC分类号： H03K5159
CPC分类号： H04L1/006 , H04L1/0054 , H04L1/1671 , H04L25/03057 , H04L2025/0349 , H04L2025/03617 , H04L2025/03624 , H04L2025/03687
摘要： An adaptive equalizer comprises a decision device; a decision feedback equalizer coupled to the decision device; an FIR filter coupled to the decision device; and a trellis decoder coupled to the decision device, adapted to provide a reliability output and a decoded output. An error signal is generated by subtracting an output of the decision feedback equalizer from an output of the decision device, the error signal being used to update coefficients of the taps of the FIR filter and the decision feedback equalizer. A magnitude of the change to the coefficients is selected based at least in part the reliability output of the trellis decoder.
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公开(公告)号：US06731682B1
公开(公告)日：2004-05-04
申请号：US09545716
申请日：2000-04-07
IPC分类号： H03H730
CPC分类号： H04L25/03159 , H04L2025/03414 , H04L2025/03522 , H04L2025/03617
摘要： An equalizer applies a window function to input blocks of data. A first finite filter multiplies each of the windowed input blocks of data with a first set of finite filter coefficients to provide respective first adjusted output blocks of data. This multiplication does not result in a full solution to ghosts. A second finite filter multiplies each of the windowed input blocks of data with a second set of finite filter coefficients to provide respective second adjusted output blocks of data. This multiplication also does not result in a full solution to ghosts. An adder performs an addition based upon corresponding ones of the first and second adjusted output blocks of data. A controller controls the window function and the first and second sets of equalizer coefficients so that, as a result of the addition, a substantially full solution to ghosts is obtained.
摘要翻译： 均衡器将窗口函数应用于输入数据块。 第一有限滤波器将每个窗口输入的数据块与第一组有限滤波器系数相乘以提供相应的第一调整的数据输出块。 这种乘法不会导致对幽灵的完整解决。 第二有限滤波器将每个窗口输入的数据块与第二组有限滤波器系数相乘，以提供相应的第二调整的数据输出块。 这种乘法也不能完全解决鬼魂。 加法器基于第一和第二调整的数据输出块中的对应的一个执行相加。 控制器控制窗口功能和第一和第二组均衡器系数，使得作为添加的结果，获得了对重影的基本上完全的解决方案。
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公开(公告)号：US20080107168A1
公开(公告)日：2008-05-08
申请号：US11547816
申请日：2005-04-08
申请人： Jingsong Xia , Shidong Chen , Richard W. Citta , Gopalan Krishnamurthy , Scott M. Lopresto , David A. Willming , Xiaojun Yang , Jilian Zhu
发明人： Jingsong Xia , Shidong Chen , Richard W. Citta , Gopalan Krishnamurthy , Scott M. Lopresto , David A. Willming , Xiaojun Yang , Jilian Zhu
IPC分类号： H04L27/01
CPC分类号： H04L25/03057 , H04L1/006 , H04L7/0062 , H04L7/042 , H04L25/0212
摘要： A digital receiver for processing a signal received from a channel includes a digital demodulator and an equalizer coupled to the digital demodulator. The equalizer includes a feedforward filter and a decision feedback equalizer (DFE), wherein the feedforward filter includes a plurality of feedforward filter taps. Coefficients are associated with the plurality of feedforward filter taps and the values of all of the coefficients associated with the plurality of feedforward filter taps are dynamically determined.
摘要翻译： 用于处理从信道接收的信号的数字接收机包括耦合到数字解调器的数字解调器和均衡器。 均衡器包括前馈滤波器和判决反馈均衡器（DFE），其中前馈滤波器包括多个前馈滤波器抽头。 系数与多个前馈滤波器抽头相关联，并且动态地确定与多个前馈滤波器抽头相关联的所有系数的值。
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9.发明授权公开(公告)号：US07130344B2
公开(公告)日：2006-10-31
申请号：US10701047
申请日：2003-11-04
IPC分类号： H03H7/40
CPC分类号： H04L1/006 , H04L1/0054 , H04L1/1671 , H04L25/03057 , H04L2025/0349 , H04L2025/03617 , H04L2025/03624 , H04L2025/03687
摘要： An adaptive equalizer comprises a decision device; a decision feedback equalizer coupled to the decision device; an FIR filter coupled to the decision device; and a trellis decoder coupled to the decision device, adapted to provide a reliability output and a decoded output. An error signal is generated by subtracting an output of the decision feedback equalizer from an output of the decision device, the error signal being used to update coefficients of the taps of the FIR filter and the decision feedback equalizer. A magnitude of the change to the coefficients is selected based at least in part the reliability output of the trellis decoder.
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公开(公告)号：US06995617B2
公开(公告)日：2006-02-07
申请号：US10404511
申请日：2003-04-01
IPC分类号： H03L7/00
CPC分类号： H03L7/087 , H03L7/093 , H04L27/38 , H04L2027/0057
摘要： A data-directed frequency-and-phase lock loop for an offset-QAM modulated signal comprises a first multiplier that multiplies the signal by the output of a VCO. The output of the first multiplier is phase-shifted by a second multiplier, then convolved by a third multiplier. The output of the third multiplier is split, with each portion being passed through a frequency-shift multiplier and a frequency-and-phase lock loop. The output of the two frequency-and-phase lock loops is summed and returned to the VCO to complete the feedback loop.
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