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21. 发明授权

US07567638B2 System and method for canceling interference in a communication system 失效
公开(公告)号：US07567638B2
公开(公告)日：2009-07-28
申请号：US11789764
申请日：2007-04-24
申请人： Thomas J. Kolze , Bruce J. Currivan , Jonathan S. Min , Eric J. Ojard , James Chi Thi , Daniel Howard
发明人： Thomas J. Kolze , Bruce J. Currivan , Jonathan S. Min , Eric J. Ojard , James Chi Thi , Daniel Howard
IPC分类号： H03D1/04
CPC分类号： H04B1/1036 , H04B1/1027 , H04B1/123 , H04L1/0001 , H04L25/03006
摘要： A filter settings generation operation includes sampling a communication channel to produce a sampled signal. The sampled signal is spectrally characterized across a frequency band of interest to produce a spectral characterization of the sampled signal. This spectral characterization may not include a signal of interest. The spectral characterization is then modified to produce a modified spectral characterization. Filter settings are then generated based upon the modified spectral characterization. Finally, the communication channel is filtered using the filter settings when the signal of interest is present on the communication channel. In modifying the spectral characterization, pluralities of spectral characteristics of the spectral characterization are independently modified to produce the modified spectral characterization. Modifications to the spectral characterization may be performed in the frequency domain and/or the time domain. One particular spectral modification that is performed is raising of the noise floor of the spectral characterization to meet a budgeted signal-to-noise ratio. Other spectral modifications include modifying spectral components corresponding to an expected interfering signal. In modifying these spectral characterizations, spectral components corresponding to a plurality of expected interfering signals may be modified.

22. 发明申请

US20090129484A1 Low Density Parity Check (LDPC) Encoded Higher Order Modulation 有权
标题翻译：低密度奇偶校验（LDPC）编码高阶调制
公开(公告)号：US20090129484A1
公开(公告)日：2009-05-21
申请号：US12272556
申请日：2008-11-17
申请人： Lin HE , Thomas J. Kolze , Ba-Zhong Shen , Gottfried Ungerboeck , Bruce J. Currivan
发明人： Lin HE , Thomas J. Kolze , Ba-Zhong Shen , Gottfried Ungerboeck , Bruce J. Currivan
IPC分类号： H04L27/36 , H04N7/24
CPC分类号： H04L27/3416 , H03M13/253 , H04L1/0057 , H04L1/0065 , H04L27/36
摘要： A method and apparatus is disclosed to map a sequence of data to Quadrature Amplitude Modulation (QAM) constellation symbols. The method and apparatus encodes only a portion of the sequence of data and leaves a remaining portion of the sequence of data unencoded. The encoded portion of the sequence of data and the remaining unencoded portion of the sequence of data are then mapped into modulation symbols of the QAM constellation. The encoded portion of the sequence of data selects subsets of the QAM constellation, and the remaining unencoded portion of the sequence of data determines a specific modulation symbol within each subset of the QAM constellation.
摘要翻译：公开了一种将数据序列映射到正交幅度调制（QAM）星座符号的方法和装置。该方法和装置仅对该数据序列的一部分进行编码，并留下未被编码的数据序列的剩余部分。然后将数据序列的编码部分和数据序列的剩余未编码部分映射到QAM星座图的调制符号中。数据序列的编码部分选择QAM星座的子集，并且数据序列的剩余未编码部分确定QAM星座图的每个子集内的特定调制符号。

23. 发明申请

US20090122846A1 ENHANCED CHANNEL CHANGING WITHIN MULTI-CHANNEL COMMUNICATION SYSTEMS 有权
标题翻译：在多通道通信系统中增强通道更改
公开(公告)号：US20090122846A1
公开(公告)日：2009-05-14
申请号：US12039763
申请日：2008-02-29
申请人： Thomas J. Kolze , Bruce J. Currivan
发明人： Thomas J. Kolze , Bruce J. Currivan
IPC分类号： H04B1/38
CPC分类号： H04N21/6118 , H04L65/4076 , H04N21/6168
摘要： Enhanced channel changing within multi-channel communication systems. A CMTS directs channel changing of a CM, sometimes between upstream data bursts. Logical channels, part of a single frequency channel, may be used, and the channel changing may be performed between those logical channels. Multiple upstream burst profiles and/or modulation densities may be used providing high degrees of robustness, fidelity, and throughput and allowing great channel flexibility. A CM may be switched between channels without losing transmitter capability. Even if some throughput rate may be sacrificed during the channel changing, the CM will still be able to continue data throughput. Then, the new channel may then undergo the initialization and ranging processes thereby enabling greater throughput on that new channel. After undergoing the initialization and ranging processes, the new channel will then be a fully equivalent member of the CM communication system.
摘要翻译：多通道通信系统中增强的信道改变。 CMTS指示CM的信道改变，有时在上行数据突发之间。可以使用逻辑信道，即单个频率信道的一部分，并且可以在这些逻辑信道之间执行信道改变。可以使用多个上游突发配置文件和/或调制密度，提供高度的鲁棒性，保真度和吞吐量，并且允许很大的信道灵活性。可以在信道之间切换CM而不会丢失发射机能力。即使在信道改变期间可能牺牲一些吞吐率，CM仍将能够继续数据吞吐量。然后，新信道然后可以经历初始化和测距过程，从而在该新信道上实现更大的吞吐量。在进行初始化和测距过程之后，新的信道将成为CM通信系统的完全等价的成员。

24. 发明授权

US07327809B2 Channel equalization with SCDMA modulation 失效
标题翻译：信道均衡与SCDMA调制
公开(公告)号：US07327809B2
公开(公告)日：2008-02-05
申请号：US10136061
申请日：2002-04-30
申请人： Thomas J. Kolze , Bruce J. Currivan
发明人： Thomas J. Kolze , Bruce J. Currivan
IPC分类号： H04L27/06
CPC分类号： H04B1/7105 , H04B1/71 , H04B1/7102 , H04B1/7103 , H04B1/71055 , H04B1/71072 , H04B2201/709709 , H04L1/0003 , H04L1/0009 , H04L1/0045 , H04L1/005 , H04L1/0057 , H04N21/6168
摘要： The present invention relates a system and method for mitigating impairment in a communication system. In one embodiment, the system includes a transmitter adapted to transmit at least one signal and a receiver adapted to receive the at least one signal and mitigate inter code interference in the signal using at least one inter code interference coefficient.
摘要翻译：本发明涉及一种用于减轻通信系统中的损害的系统和方法。在一个实施例中，系统包括适于发送至少一个信号的发射机和适于接收至少一个信号的接收机，并使用至少一个码间干扰系数来减轻信号中的码间干扰。

25. 发明授权

US07313206B2 Modified branch metrics for processing soft decisions to account for phase noise impact on cluster variance 有权
标题翻译：用于处理软判决以解决相位噪声对集群方差的影响的修改分支度量
公开(公告)号：US07313206B2
公开(公告)日：2007-12-25
申请号：US11590387
申请日：2006-10-31
申请人： Thomas J. Kolze
发明人： Thomas J. Kolze
IPC分类号： H03D1/00 , H03D3/00
CPC分类号： H04L25/067 , H04L25/03184 , H04L27/2647
摘要： Modified branch metrics for processing bit-soft decisions to account for phase noise impact on cluster variance (CV). The present invention is able to partition a modulation scheme's constellation into two or more regions, so that the bit-soft decision branch metrics may be adjusted based on the CV of the various constellation points. A confidence level may be attached to the various constellation points based on their particular CVs. There are a number of methods to ascertain the CV of the constellation's points, including finding characteristics of various components in a communication system (transmitter, communication channel and receiver), and any method may be used within various embodiments. The modification of the branch metrics/confidence level may be performed in a communication receiver; the communication receiver may be implemented in a communication system employing the vector orthogonal frequency division multiplexing (VOFDM) portion of the broadband wireless internet forum (BWIF).
摘要翻译：用于处理比特软决策的修改分支指标，以解决相位噪声对群集方差（CV）的影响。本发明能够将调制方案的星座划分成两个或更多个区域，使得可以基于各种星座点的CV来调整比特软判决分支度量。基于它们的特定CV可以对各种星座点附加置信度。确定星座点的CV的方法有许多，包括查找通信系统（发射机，通信信道和接收机）中的各种组件的特征，并且可以在各种实施例中使用任何方法。分支度量/置信水平的修改可以在通信接收机中执行; 通信接收机可以在采用宽带无线互联网论坛（BWIF）的向量正交频分复用（VOFDM）部分的通信系统中实现。

26. 发明授权

US07305049B2 Characterizing channel response in a single upstream burst using redundant information from training tones 有权
标题翻译：使用来自训练色调的冗余信息在单个上游脉冲串中表征信道响应
公开(公告)号：US07305049B2
公开(公告)日：2007-12-04
申请号：US11590388
申请日：2006-10-31
申请人： Thomas J. Kolze
发明人： Thomas J. Kolze
IPC分类号： H03K9/00
CPC分类号： H04L25/0224 , H04L25/0212 , H04L25/0216 , H04L27/2601
摘要： Characterizing channel response in a single upstream burst using redundant information from training tones (TTs). The invention is operable to utilize inserted TTs, contained within a transmitted data frame, to provide for an improved estimate of a communication channel's actual response and an improved estimate of the noise of the communication channel. The invention determines a maximum allowable delay spread of the many communication paths within a multi-path communication channel. Using the redundant TTs information then a portion of the finite impulse response of the communication channel, within the time domain, may be zeroed, thereby providing a much improved channel estimate and noise estimate. Using the redundant TTs, less noise is introduced onto the data tones (DTs) within a data frame. The present invention is also able to identify those portions of the TTs that are attributable to the actual channel and those that are attributable to the channel's noise.
摘要翻译：使用来自训练音（TT）的冗余信息来表征单个上游脉冲串中的信道响应。本发明可操作以利用包含在传输的数据帧内的插入的TT来提供对通信信道的实际响应的改进的估计和对通信信道的噪声的改进的估计。本发明确定多路通信信道内的许多通信路径的最大允许延迟扩展。使用冗余TTs信息，在时域内的通信信道的有限脉冲响应的一部分可以被归零，从而提供了大大改进的信道估计和噪声估计。使用冗余TT，在数据帧内的数据音调（DT）上引入较少的噪声。本发明还能够识别可归因于实际信道的那些TT部分以及归因于信道噪声的那些部分。

27. 发明授权

US07190710B2 Successive interference canceling for CMDA 失效
标题翻译： CMDA的连续干扰消除
公开(公告)号：US07190710B2
公开(公告)日：2007-03-13
申请号：US10242032
申请日：2002-09-12
申请人： Nabil R. Yousef , Thomas J. Kolze
发明人： Nabil R. Yousef , Thomas J. Kolze
IPC分类号： H04B1/69 , H04B1/707 , H04B1/713 , H04B3/36
CPC分类号： H04B1/71 , H04B1/7102 , H04B1/7103 , H04B1/71055 , H04B1/71072 , H04B2201/709709 , H04L1/0003 , H04L1/0009 , H04L1/0045 , H04L1/005 , H04L1/0057 , H04N21/6168
摘要： Successive interference canceling for CMDA. ICI may result from a signal's multipath effects, or by filtering/suppression of some of the component energy of the signaling waveforms. Energy component attenuation destroys orthogonality of CDMA symbols thereby causing ICI. An ICF suppresses frequency domain portions (attenuates ingress), but also introduces ICI. Following the ICF, the signal is de-spread, sliced, re-spread and convolved with the ICF echoes (except first tap echoes). Convolving re-spread hard decisions with delayed ICF taps is equivalent to partially re-modulating the first-pass hard decisions to efficiently “add-back-in” the signal energy which was blanked/subtracted by the ICF. Alternatively, parameter estimation de-rotates and re-rotates soft symbols and hard decisions, respectively, compensating for undesirable symbol rotation. The convolved signal is subtracted from a delayed version of the ICF output signal. If desired, this process may be repeated successively to enhance the accuracy of the obtained data decisions in the next stage.
摘要翻译： CMDA的连续干扰消除。 ICI可能由信号的多径效应，或通过滤波/抑制信号波形的一些分量能量产生。能量分量衰减破坏了CDMA符号的正交性，从而导致ICI。 ICF抑制频域部分（衰减入口），但也引入了ICI。在ICF之后，信号被解扩，切片，再扩散并与ICF回波卷积（除了第一抽头回波）。用延迟的ICF抽头卷积重新扩展硬判决相当于部分重新调制首次硬判决，以有效地“加入”ICF消隐/减去的信号能量。或者，参数估计分别旋转并重新旋转软符号和硬判决，以补偿不期望的符号旋转。从ICF输出信号的延迟版本中减去卷积信号。如果需要，可以连续地重复该过程，以提高在下一阶段获得的数据决定的准确性。

28. 发明授权

US07184506B2 Frequency drift and phase error compensation in a VOFDM receiver 有权
标题翻译： VOFDM接收机中的频率漂移和相位误差补偿
公开(公告)号：US07184506B2
公开(公告)日：2007-02-27
申请号：US10112128
申请日：2002-03-30
申请人： Thomas J. Kolze
发明人： Thomas J. Kolze
IPC分类号： H04L7/00
CPC分类号： H04L27/0014 , H04L27/2657 , H04L27/2676 , H04L2027/0067
摘要： Improved frequency drift and phase error compensation in a VOFDM receiver. The invention is operable to compensate for frequency drift and phase error within a window that may include a single frame, a sub-frame, or multiple frames. The compensation is performed after having performed estimation of the phase within the particular window; any phase error and frequency drift may be identified and an appropriate form of compensation may be identified to perform curve fitting of the phase within the compensation window. The curve fitting of the phase is performed using linear techniques in one embodiment; an average phase and appropriate slope/ramp are calculated to match the phase as accurately as possible. Other alternative compensation techniques may also be performed, including higher order curve matching techniques. The receiver is operable to perform any necessary compensation before passing the now-compensated data to a symbol processing functional block.
摘要翻译：改进的VOFDM接收机中的频率漂移和相位误差补偿。本发明可用于补偿可能包括单个帧，子帧或多个帧的窗口内的频率漂移和相位误差。在对特定窗口中的相位进行估计之后进行补偿; 可以识别任何相位误差和频率漂移，并且可以识别适当形式的补偿以在补偿窗口内执行相位的曲线拟合。在一个实施例中使用线性技术来执行相位的曲线拟合; 计算平均相位和适当的斜率/斜坡以尽可能准确地匹配相位。还可以执行其他替代的补偿技术，包括高阶曲线匹配技术。接收器可操作以在将现在补偿的数据传递到符号处理功能块之前执行任何必要的补偿。

29. 发明授权

US07139331B2 Characterizing channel response in a single upstream burst using redundant information from training tones 失效
公开(公告)号：US07139331B2
公开(公告)日：2006-11-21
申请号：US10112567
申请日：2002-03-30
申请人： Thomas J. Kolze
发明人： Thomas J. Kolze
IPC分类号： H03K9/00 , H04L27/06 , H04L27/14 , H04L27/22
CPC分类号： H04L25/0224 , H04L25/0212 , H04L25/0216 , H04L27/2601
摘要： Characterizing channel response in a single upstream burst using redundant information from training tones (TTs). The invention is operable to utilize inserted TTs, contained within a transmitted data frame, to provide for an improved estimate of a communication channel's actual response and an improved estimate of the noise of the communication channel. The invention determines a maximum allowable delay spread of the many communication paths within a multi-path communication channel. Using the redundant TTs information, then a portion of the finite impulse response of the communication channel, within the time domain, may be zeroed, thereby providing a much improved channel estimate and noise estimate. Using the redundant TTs, less noise is introduced onto the data tones (DTs) within a data frame. The present invention is also able to identify those portions of the TTs that are attributable to the actual channel and those that are attributable to the channel's noise.

30. 发明授权

US06285681B1 Variable length burst transmission over the physical layer of a multilayer transmission format 失效
标题翻译：多层传输格式的物理层上的可变长度突发传输
公开(公告)号：US06285681B1
公开(公告)日：2001-09-04
申请号：US09059113
申请日：1998-04-13
申请人： Thomas J. Kolze , Steven E. Anderson , Victor T. Hou
发明人： Thomas J. Kolze , Steven E. Anderson , Victor T. Hou
IPC分类号： H04Q1104
CPC分类号： H04L1/0065 , H04L1/0002 , H04L1/0003 , H04L1/0006 , H04L1/0007 , H04L1/0009 , H04L1/0018 , H04L1/0071 , H04L1/1809 , H04L12/2801 , H04L2012/5607 , H04L2012/5645 , H04L2012/5647 , H04L2012/5652 , H04Q11/0478
摘要： Apparatus is provided for communicating data packets in variable length bursts over a physical layer in a multilayer data communication scheme. Each burst contains information data (40, 50, 60, 64, 74, 78, 82) and overhead (30, 32, 34, 36, 38, 42, 44, 62, 66, 76, 80, 84). The overhead includes forward error control (FEC) data (42, 62, 66, 76, 80, 84). Different burst modes (FIG. 2, 3, 4, 5) are provided to enable a trade-off to be made between bandwidth efficiency and data transmission robustness. The burst modes provide different combinations of modulation (such as QPSK and 16-QAM), symbol rates, FEC coding levels and frame and preamble structure. The apparatus is particularly suitable for use in upstream communications over hybrid fiber coax cable television plants.
摘要翻译：提供了用于在多层数据通信方案中在物理层上以可变长度突发传送数据分组的装置。每个突发包含信息数据（40,50,60,64,74,78,82）和头顶（30,32,34,36,38,42,44,62,66,76,80,84）。开销包括前向错误控制（FEC）数据（42,62,66,76,80,84）。提供了不同的突发模式（图2,3,4,5），以便能够在带宽效率和数据传输鲁棒性之间进行权衡。突发模式提供了不同的调制组合（例如QPSK和16-QAM），符号率，FEC编码电平和帧和前导码结构。该装置特别适用于混合光纤同轴电缆电视设备的上行通信。

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