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1.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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公开(公告)号：US08848781B2
公开(公告)日：2014-09-30
申请号：US12599734
申请日：2008-05-16
IPC分类号： H04N7/12
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 a packet of data having a data payload and a header, byte code encoding the data in the packet, and altering information in the header in response to the byte code encoding. An apparatus is described including an encoder receiving a packet of data and encoding the data using a byte code encoding process and a header modifier altering information in the header in response to the byte code encoding. A decoding apparatus is described including a packet identifier receiving a plurality of data packets, and identifying a data packet based on information in the header, a byte code decoder decoding the identified data packet using a byte code decoding process, and a Reed-Solomon decoder decoding at least the decoded identified data packet using a Reed-Solomon decoding 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，包括以下步骤：接收具有数据有效载荷和报头的数据分组，对分组中的数据进行编码的字节代码，以及响应于字节代码编码改变报头中的信息。 描述了一种装置，其包括接收数据分组并使用字节代码编码处理对数据进行编码的编码器，以及响应于字节代码编码改变标题中的信息的标题修饰符。 描述了一种解码装置，其包括接收多个数据分组的分组标识符，并且基于标题中的信息来识别数据分组，使用字节码解码处理对所识别的数据分组进行解码的字节码解码器，以及里德 - 所罗门解码器 使用Reed-Solomon解码处理解码至少解码的识别数据分组。
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4.发明授权Data-directed frequency-and-phase lock loop for decoding an offset-QAM modulated signal having a pilot 有权用于解码具有导频的偏移-QAM调制信号的数据定向的频相锁相环公开(公告)号：US07272203B2
公开(公告)日：2007-09-18
申请号：US10404553
申请日：2003-04-01
CPC分类号： H04L27/38 , H03L7/093 , H03L7/185 , H04L2027/0057 , H04L2027/0089
摘要： A data-and-pilot directed frequency-and-phase lock loop for an offset-QAM modulated signal having a pilot signal comprising a pilot acquisition loop and a pair of data-directed acquisition loops. The pilot is extracted from the main signal by a pilot filter, then used both by the pilot acquisition loop and to remove the pilot from the signal to the data-directed acquisition loops. The outputs of the pilot and the two data-directed acquisition loops are summed and returned to the VCO to complete the feedback loop.
摘要翻译： 一种用于具有导频信号的偏移-QAM调制信号的数据和导频定向的频相锁相环，包括导频采集环路和一对数据定向采集环路。 通过导频滤波器从主信号中提取导频，然后由导频采集环路使用，并将导频从信号中去除到数据导向采集环路。 导频和两个数据导向采集环路的输出相加并返回到VCO，以完成反馈环路。
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公开(公告)号：US06700930B1
公开(公告)日：2004-03-02
申请号：US09283877
申请日：1999-04-01
IPC分类号： H04L521
CPC分类号： H04L25/03159 , H04L25/03038 , H04L2025/03528
摘要： An equalizer substantially eliminates a ghost of a received main signal by (i) applying coefficients b (where b may be equal to one) to the received main signal and the ghost in order to modulate the received main signal and the ghost so that the received main signal and the ghost are unequal, (ii) applying coefficients a to the modulated received main signal and ghost in order to substantially eliminate the ghost, and (iii) applying coefficients c as a window function to the substantially ghost-free received main signal in order to remove the modulation imposed on the received main signal by the coefficients b.
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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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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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9.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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