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公开(公告)号：US08139681B2
公开(公告)日：2012-03-20
申请号：US11662574
申请日：2005-09-09
IPC分类号： H03K9/00
CPC分类号： H04L27/2277 , H04L25/0224 , H04L2027/0032 , H04L2027/0055 , H04L2027/0061 , H04L2027/0067 , H04L2027/0095
摘要： A communications signal is received through a propagation channel, down-converted in frequency and then converted into a digital signal. The samples of the digital signal are processed to estimate the information conveyed by the communications signal. The estimated information is then used with knowledge about the propagation channel to model the samples of the digital signal. The modeled samples are compared with actual samples of the digital signal to deduce phase errors in the digital signal. The phase errors are then used to deduce a frequency error in the digital signal that can be used to correct the samples of the digital signal and to correct the down-conversion process.
摘要翻译： 通过传播信道接收通信信号，频率下变频，然后转换为数字信号。 对数字信号的采样进行处理，以估计通信信号传送的信息。 然后将估计的信息用于关于传播信道的知识以对数字信号的采样进行建模。 将建模样本与数字信号的实际采样进行比较，以推断数字信号中的相位误差。 然后使用相位误差来推导数字信号中的频率误差，该频率误差可用于校正数字信号的采样并纠正下变频过程。
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公开(公告)号：US20070297372A1
公开(公告)日：2007-12-27
申请号：US11659600
申请日：2005-08-05
申请人： Navid Fatemi-Ghomi , Cyril Valadon
发明人： Navid Fatemi-Ghomi , Cyril Valadon
IPC分类号： H04B7/212
CPC分类号： H04L7/0054 , H04B7/2681
摘要： A telecommunications network participant, comprising means for digitising, as a series of samples, a received signal containing a succession of symbols, means for measuring time misalignment between the symbols and the samples and means for applying a fractional delay to the positions of the samples to reduce the misalignment.
摘要翻译： 一种电信网络参与者，包括用于数字化作为一系列样本的包含一系列符号的接收信号的装置，用于测量符号和样本之间的时间不对准的装置，以及用于将样本的位置应用分数延迟的装置 减少不对准。
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公开(公告)号：US08340204B2
公开(公告)日：2012-12-25
申请号：US11660219
申请日：2005-08-05
申请人： Navid Fatemi-Ghomi , Cyril Valadon
发明人： Navid Fatemi-Ghomi , Cyril Valadon
CPC分类号： H04L1/0059 , H03M13/3955 , H03M13/4138 , H04L1/0054
摘要： A Viterbi trellis processing technique in which soft decisions and hard decisions are derived from a received signal and the soft decisions are enhanced by being modified using the hard decisions. A log likelihood ratio for a bit of the received signal can be derived by grouping candidate metrics associated with the decision that the bit has a first state, grouping candidate metrics associated with the decision that the bit has a second state, applying respective functions to the groups and calculating the difference of the function values.
摘要翻译： 维特比网格处理技术，其中软判决和硬判决从接收到的信号导出，并且通过使用硬判决来修改软判决来增强。 可以通过对与该位具有第一状态的判定相关联的候选度量进行分组来导出接收信号的位的对数似然比，将与该位具有第二状态的判定相关联的候选度量分组，将相应的函数应用于 组和计算功能值的差异。
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公开(公告)号：US20080130729A1
公开(公告)日：2008-06-05
申请号：US11662574
申请日：2005-09-09
IPC分类号： H04B17/00
CPC分类号： H04L27/2277 , H04L25/0224 , H04L2027/0032 , H04L2027/0055 , H04L2027/0061 , H04L2027/0067 , H04L2027/0095
摘要： A communications signal is received through a propagation channel, down-converted in frequency and then converted into a digital signal. The samples of the digital signal are processed to estimate the information conveyed by the communications signal. The estimated information is then used with knowledge about the propagation channel to model the samples of the digital signal. The modeled samples are compared with actual samples of the digital signal to deduce phase errors in the digital signal. The phase errors are then used to deduce a frequency error in the digital signal that can be used to correct the samples of the digital signal and to correct the down-conversion process.
摘要翻译： 通过传播信道接收通信信号，频率下变频，然后转换为数字信号。 对数字信号的采样进行处理，以估计通信信号传送的信息。 然后将估计的信息用于关于传播信道的知识以对数字信号的采样进行建模。 将建模样本与数字信号的实际采样进行比较，以推断数字信号中的相位误差。 然后使用相位误差来推导数字信号中的频率误差，该频率误差可用于校正数字信号的采样并纠正下变频过程。
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公开(公告)号：US08139627B2
公开(公告)日：2012-03-20
申请号：US11661632
申请日：2005-08-15
CPC分类号： H04L25/062 , H04L25/0212
摘要： A scheme for deducing a DC offset in a received signal burst acquired through a particular channel, wherein the received signal burst corresponds to a transmitted signal burst. An impulse response estimate of the channel is used to model how a known or recovered part of the transmitted burst would have been affected by passage through said channel in place of the corresponding part of the transmitted signal burst. The modelled part of the transmitted burst is then compared with the corresponding part of the received signal burst to deduce a DC offset present in the received signal burst.
摘要翻译： 一种用于推导通过特定信道获取的接收信号突发中的DC偏移的方案，其中所接收的信号脉冲串对应于发射的信号突发。 信道的脉冲响应估计用于建模传送的脉冲串的已知或恢复的部分将如何通过所述信道而不是所传输的信号脉冲串的相应部分而受到影响。 然后将所发送脉冲串的建模部分与接收信号脉冲串的对应部分进行比较，以推断存在于接收信号脉冲串中的DC偏移。
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公开(公告)号：US20080192862A1
公开(公告)日：2008-08-14
申请号：US11661632
申请日：2005-08-15
CPC分类号： H04L25/062 , H04L25/0212
摘要： A scheme for deducing a DC offset in a received signal burst acquired through a particular channel, wherein the received signal burst corresponds to a transmitted signal burst. An impulse response estimate of the channel is used to model how a known or recovered part of the transmitted burst would have been affected by passage through said channel in place of the corresponding part of the transmitted signal burst. The modeled part of the transmitted burst is then compared with the corresponding part of the received signal burst to deduce a DC offset present in the received signal burst.
摘要翻译： 一种用于推导通过特定信道获取的接收信号突发中的DC偏移的方案，其中所接收的信号脉冲串对应于发射的信号突发。 信道的脉冲响应估计用于建模传送的脉冲串的已知或恢复的部分将如何通过所述信道而不是所传输的信号脉冲串的相应部分而受到影响。 然后将所发送脉冲串的建模部分与接收信号脉冲串的对应部分进行比较，以推断存在于接收信号脉冲串中的DC偏移。
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公开(公告)号：US07974262B2
公开(公告)日：2011-07-05
申请号：US11659600
申请日：2005-08-05
申请人： Navid Fatemi-Ghomi , Cyril Valadon
发明人： Navid Fatemi-Ghomi , Cyril Valadon
IPC分类号： H04J3/06
CPC分类号： H04L7/0054 , H04B7/2681
摘要： A telecommunications network participant, comprising means for digitising, as a series of samples, a received signal containing a succession of symbols, means for measuring time misalignment between the symbols and the samples and means for applying a fractional delay to the positions of the samples to reduce the misalignment.
摘要翻译： 一种电信网络参与者，包括用于数字化作为一系列样本的包含一系列符号的接收信号的装置，用于测量符号和样本之间的时间不对准的装置，以及用于将样本的位置应用分数延迟的装置 减少不对准。
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公开(公告)号：US20090110124A1
公开(公告)日：2009-04-30
申请号：US11660219
申请日：2005-08-05
申请人： Navid Fatemi-Ghomi , Cyril Valadon
发明人： Navid Fatemi-Ghomi , Cyril Valadon
IPC分类号： H04L27/06
CPC分类号： H04L1/0059 , H03M13/3955 , H03M13/4138 , H04L1/0054
摘要： A Viterbi trellis processing technique in which soft decisions and hard decisions are derived from a received signal and the soft decisions are enhanced by being modified using the hard decisions. A log likelihood ratio for a bit of the received signal can be derived by grouping candidate metrics associated with the decision that the bit has a first state, grouping candidate metrics associated with the decision that the bit has a second state, applying respective functions to the groups and calculating the difference of the function values.
摘要翻译： 维特比网格处理技术，其中软判决和硬判决从接收到的信号导出，并且通过使用硬判决来修改软判决来增强。 可以通过对与该位具有第一状态的判定相关联的候选度量进行分组来导出接收信号的位的对数似然比，将与该位具有第二状态的判定相关联的候选度量分组，将相应的函数应用于 组和计算功能值的差异。
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公开(公告)号：US20110211661A1
公开(公告)日：2011-09-01
申请号：US13106616
申请日：2011-05-12
申请人： Cyril Valadon
发明人： Cyril Valadon
IPC分类号： H04L27/06
CPC分类号： H04L25/03292 , H04L25/03184 , H04L25/03235
摘要： A trellis processing technique for estimating a transmitted signal from a received signal acquired through a channel achieves a reduced computational structure when implementing a DDFSE-like branch metrics calculation by pre-storing computed values, which can be re-used. The technique involves storing differences between a received symbol and different products, each of which is a product of a channel coefficient corresponding to a least time delay and a different possible transmitted symbol. A summation of products is calculated, each product being a product of a possible transmitted signal symbol and a channel coefficient other than the channel coefficient corresponding to the least time delay, the summation being specific to a branch-start state in a trellis. The summation is combined with different stored differences in a calculation of branch metrics leading to different branch-end states in the trellis.
摘要翻译： 用于通过信道获取的接收信号估计发射信号的网格处理技术通过预先存储可重新使用的计算值来实现类似DDFSE的分支量度计算，实现了减少的计算结构。 该技术涉及存储接收符号和不同产品之间的差异，每个产品是与最小时间延迟对应的信道系数与不同可能发送符号的乘积。 计算产品的总和，每个产品是可能的传输信号符号的乘积和不同于最小时间延迟的信道系数的通道系数，该总和特定于网格中的分支开始状态。 总和与不同的存储差异结合在分支度量的计算中，导致网格中不同的分支结束状态。
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公开(公告)号：US20100040176A1
公开(公告)日：2010-02-18
申请号：US12306411
申请日：2007-06-12
申请人： Cyril Valadon , Richard Lane , Neil Colin Campbell
发明人： Cyril Valadon , Richard Lane , Neil Colin Campbell
CPC分类号： H04L25/0216
摘要： A method of steering a channel estimation search window, the method comprising providing a series of raw CIR tap values to span a channel estimation search window containing a sub-window whose contents are intended to be passed for further processing to produce a refined CIR estimate, determining, amongst a plurality of groups of continuous tap values within the window, the group containing the largest amount of signal energy and time-shifting the window as necessary to arrange that the group so determined occupies the sub-window.
摘要翻译： 一种导频信道估计搜索窗口的方法，所述方法包括提供一系列原始CIR抽头值，以跨越包含其内容旨在被传递的子窗口的信道估计搜索窗口，用于进一步处理以产生精确的CIR估计， 在窗口内的多组连续抽头值中确定包含最大量的信号能量的组并根据需要对窗口进行时移，以使得如此确定的组占据子窗口。
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