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1. 发明授权

US08503592B2 Symbol synchronization for communication 失效
标题翻译：符号同步通讯
公开(公告)号：US08503592B2
公开(公告)日：2013-08-06
申请号：US13366827
申请日：2012-02-06
申请人： Jeffrey C. Strait
发明人： Jeffrey C. Strait
IPC分类号： H04L7/00
CPC分类号： H04L27/2663 , H04L27/2665 , H04L27/2675 , H04L27/2679
摘要： A communication system and method is disclosed that performs symbol boundary synchronization by generating a symbol alignment estimate from a partial signal correlation; and then refining the symbol alignment estimate via a carrier phase calculation. To generate the symbol alignment estimate, two methods are disclosed. After an estimate is determined, an embodiment provides for refining the symbol alignment estimate via a carrier phase calculation by determining a carrier phase of two adjacent carriers, determining a phase error as directly proportional to an offset from the start of a symbol, determining a phase difference contribution due to a communication channel and device hardware, and counter-rotating the determined carrier phase by an angle of a constellation point at a transmitter.
摘要翻译：公开了一种通过从部分信号相关产生符号对准估计来执行符号边界同步的通信系统和方法; 然后通过载波相位计算来改进符号对准估计。为了生成符号对齐估计，公开了两种方法。在确定估计之后，实施例通过确定两个相邻载波的载波相位，经由载波相位计算来提炼符号对准估计，确定与从符号开始起的偏移成正比的相位误差，确定相位由于通信信道和设备硬件导致的差异贡献，并且将所确定的载波相位反向旋转发射机处的星座点的角度。

2. 发明授权

US06763061B1 Frequency domain technique for narrowband noise cancellation in DMT receivers 失效
标题翻译：用于DMT接收机中窄带噪声消除的频域技术
公开(公告)号：US06763061B1
公开(公告)日：2004-07-13
申请号：US09628842
申请日：2000-07-31
申请人： Jeffrey C. Strait , Eugene T. Sy
发明人： Jeffrey C. Strait , Eugene T. Sy
IPC分类号： H04B110
CPC分类号： H04L27/2649
摘要： The system and method of the preferred embodiments may be directed to improving the signal-to-noise ratio in frequency spectrum regions where narrowband interference may be present. The system and method of the preferred embodiments includes reducing the narrowband interference by determining a noise estimate. In accordance with the noise estimate and output of a frequency domain equalizer, a noise-cancelled output may be obtained.
摘要翻译：优选实施例的系统和方法可以用于改善可能存在窄带干扰的频谱区域中的信噪比。优选实施例的系统和方法包括通过确定噪声估计来减小窄带干扰。根据频域均衡器的噪声估计和输出，可以获得噪声抵消的输出。

3. 发明授权

US06732281B1 System and method for loading data onto carriers 失效
标题翻译：将数据载入载体的系统和方法
公开(公告)号：US06732281B1
公开(公告)日：2004-05-04
申请号：US09583833
申请日：2000-05-31
申请人： Ravi G. Mantri , Jeffrey C. Strait
发明人： Ravi G. Mantri , Jeffrey C. Strait
IPC分类号： G06F126
CPC分类号： H04L27/2608
摘要： A system and method for providing bit-loading enhancement is provided, including methods of determining an extended bit capacity for a plurality of carriers, wherein a first portion of the plurality of carriers is loaded and a second portion of the plurality of carriers is initially unloaded and bits are allocated between said first and second portions in accordance with power requirements for loading bits onto said first or second portion of the plurality of carriers, as well as methods of optimizing the average signal to noise margin for a plurality of carriers, wherein a first portion of the plurality of carriers is loaded and a second portion of the plurality of carriers is initially unloaded, and bits are loaded from the first portion onto the second portion in accordance with a power savings related to such a loading from the first portion onto the second portion.
摘要翻译：提供了一种用于提供比特加载增强的系统和方法，包括确定多个载波的扩展比特容量的方法，其中多个载波的第一部分被加载，并且多个载波的第二部分最初被卸载并且根据用于将比特加载到所述多个载波的所述第一或第二部分上的功率要求，以及为多个载波优化平均信噪比的方法，在所述第一和第二部分之间分配比特，其中a 多个载体的第一部分被加载，并且多个载体的第二部分最初被卸载，并且根据与这种载荷相关的功率节省从第一部分将钻头从第一部分加载到第二部分上，从第一部分到第二部分。

4. 发明授权

US08553800B1 LTE-advanced transmit diversity decoders 失效
标题翻译： LTE高级发射分集解码器
公开(公告)号：US08553800B1
公开(公告)日：2013-10-08
申请号：US13467865
申请日：2012-05-09
申请人： Jeffrey C. Strait
发明人： Jeffrey C. Strait
IPC分类号： H04B7/02 , H04L1/02
CPC分类号： H04J11/0063 , H04B7/0413 , H04B7/046 , H04B7/0882 , H04L1/02 , H04L5/0007 , H04L25/0204 , H04L25/03 , H04L27/2647
摘要： Various embodiments of a transmit diversity decoding techniques are provided. In one aspect, a method receives a first input that includes signals transmitted by M transmit antennas on C channels and received by N receive antennas, where M, N and C is each a positive integer greater than 1. The method also receives a second input that includes estimates of channel matrix elements. The method further generates an output that includes at least an estimate of a transmit signal transmitted by one of the M transmit antennas on one of the C channels based at least in part on the first and the second inputs.
摘要翻译：提供了发射分集解码技术的各种实施例。一方面，一种方法接收第一输入，该第一输入包括由M个发射天线在C个信道上发射并由N个接收天线接收的信号，其中M，N和C各自为大于1的正整数。该方法还接收第二输入其中包括渠道矩阵元素的估计。该方法还至少部分地基于第一和第二输入产生至少包括由M个发射天线之一在C个信道中的一个发送的发射信号的估计。

5. 发明授权

US06643340B1 Carrier phase derived symbol timing 失效
公开(公告)号：US06643340B1
公开(公告)日：2003-11-04
申请号：US10074780
申请日：2002-02-13
申请人： Jeffrey C. Strait
发明人： Jeffrey C. Strait
IPC分类号： H04L700
CPC分类号： H04L27/2662 , H04L27/2675
摘要： A method and apparatus for symbol timing initialization in a multi-carrier receiver. The method uses phase measurements from a plurality of the individual carriers to make an initial determination of the symbol boundary. The method measures the phases of two carriers, preferably the pilot carrier and one adjacent carrier, and, after compensating for phase distortion associated with modulation of data onto the carrier and phase distortion imposed on the carriers by the channel, determines the symbol timing based on the phase difference between the two carriers. Because a sampling offset results in a phase offset from bin to bin of a DFT, an examination of the extent of the phase offset between two known symbols yields the sampling offset, and thus the symbol frame index.

6. 发明授权

US07804906B2 Multicarrier transceiver 有权
标题翻译：多载波收发器
公开(公告)号：US07804906B2
公开(公告)日：2010-09-28
申请号：US10979007
申请日：2004-11-01
申请人： Terry C. Brown , Christopher R. Hansen , Jeffrey C. Strait , Ravi G. Mantri , Felician Bors
发明人： Terry C. Brown , Christopher R. Hansen , Jeffrey C. Strait , Ravi G. Mantri , Felician Bors
IPC分类号： H04L27/28
CPC分类号： H04L27/263 , H04L27/265
摘要： A multicarrier transceiver is disclosed that includes a digital signal processor with a plurality of memory locations, a direct memory, an encoder module coupled to receive data from the FIFO buffers, a decoder module coupled to receive data from the FIFO buffers, a Fourier transform module configured to perform an inverse Fast Fourier transform for transmit operations and to perform Fast Fourier transform (FFT) operations for receive operations, a plurality of distributed modules including the encoder module, the decoder module and the Fourier transform module, each module configured with a memory port, each memory port coupled to a peripheral bus and the DMA bus, a plurality of memory ports coupled to each of the distributed modules, the plurality of memory ports coupled to a peripheral bus, and a plurality of point-to-point buses coupled to each of the distributed modules, the point-to-point bus configured to enable data flow and testing and provide a bypass capability for each of the distributed modules.
摘要翻译：公开了一种多载波收发器，其包括具有多个存储器位置的数字信号处理器，直接存储器，耦合以从FIFO缓冲器接收数据的编码器模块，耦合以从FIFO缓冲器接收数据的解码器模块，傅里叶变换模块被配置为执行用于发射操作的快速傅立叶反变换，并对接收操作执行快速傅里叶变换（FFT）操作，包括编码器模块，解码器模块和傅里叶变换模块的多个分布式模块，每个模块配置有存储器端口，每个存储器端口耦合到外围总线和DMA总线，耦合到每个分布式模块的多个存储器端口，耦合到外围总线的多个存储器端口以及多个点对点总线耦合对于每个分布式模块，点对点总线被配置为启用数据流和测试，并为t中的每一个提供旁路能力他分发了模块。

7. 发明授权

US08675753B2 Symbol synchronization for communication 失效
标题翻译：符号同步通讯
公开(公告)号：US08675753B2
公开(公告)日：2014-03-18
申请号：US13338677
申请日：2011-12-28
申请人： Jeffrey C. Strait
发明人： Jeffrey C. Strait
IPC分类号： H04K1/10
CPC分类号： H04L27/2663 , H04L27/2665 , H04L27/2675 , H04L27/2679
摘要： A communication system and method is disclosed that performs symbol boundary synchronization by generating a symbol alignment estimate from a partial signal correlation; and then refining the symbol alignment estimate via a carrier phase calculation. To generate the symbol alignment estimate, two methods are disclosed. After an estimate is determined, an embodiment provides for refining the symbol alignment estimate via a carrier phase calculation by determining a carrier phase of two adjacent carriers, determining a phase error as directly proportional to an offset from the start of a symbol, determining a phase difference contribution due to a communication channel and device hardware, and counter-rotating the determined carrier phase by an angle of a constellation point at a transmitter.
摘要翻译：公开了一种通过从部分信号相关产生符号对准估计来执行符号边界同步的通信系统和方法; 然后通过载波相位计算来改进符号对准估计。为了生成符号对齐估计，公开了两种方法。在确定估计之后，实施例通过确定两个相邻载波的载波相位，经由载波相位计算来提炼符号对准估计，确定与从符号开始起的偏移成正比的相位误差，确定相位由于通信信道和设备硬件导致的差异贡献，并且将所确定的载波相位反向旋转发射机处的星座点的角度。

8. 发明授权

US06834079B1 Efficient implementation for equalization of multicarrier channels 有权
标题翻译：多载波信道均衡的高效实现
公开(公告)号：US06834079B1
公开(公告)日：2004-12-21
申请号：US09693498
申请日：2000-10-20
申请人： Jeffrey C. Strait , Eugene T. Sy
发明人： Jeffrey C. Strait , Eugene T. Sy
IPC分类号： H03H730
CPC分类号： H04L25/03012 , H04L2025/03414
摘要： A system and method for minimizing the effective channel impulse response in multitone communication systems, is provided. A time domain equalizer is utilized to shorten the channel impulse response to a length equal to or less than the time duration of the cyclic prefix. The time domain equalizer includes an adaptable filter with updateable coefficients. The updateable coefficients are calculated in a storage efficient manner to effectively estimate a desirable channel response. Processing of the time domain equalizer signal improves the symbol boundary estimate and effectively reduces the effect of noise of the updateable coefficient solution.
摘要翻译：提供了一种用于最小化多音通信系统中的有效信道脉冲响应的系统和方法。使用时域均衡器将信道脉冲响应缩短到等于或小于循环前缀的持续时间的长度。时域均衡器包括具有可更新系数的适应滤波器。可更新系数以存储有效的方式计算，以有效地估计期望的信道响应。时域均衡器信号的处理提高了符号边界估计，有效降低了可更新系数解的噪声影响。

9. 发明授权

US06608864B1 Method and apparatus for fault recovery in a decision feedback equalizer 失效
标题翻译：决策反馈均衡器中故障恢复的方法和装置
公开(公告)号：US06608864B1
公开(公告)日：2003-08-19
申请号：US09320258
申请日：1999-05-26
申请人： Jeffrey C. Strait
发明人： Jeffrey C. Strait
IPC分类号： H04L2701
CPC分类号： H04L25/03159 , H04L2025/03414 , H04L2025/03522 , H04L2025/03617 , H04L2025/03687
摘要： A method and apparatus for frequency domain equalization. The method and apparatus are particularly well suited for use in a receiver in a multicarrier transmission system that has predetermined symbols periodically embedded in the transmissions, such as in an ADSL system. The equalizer apparatus includes a digital filter having a plurality of single-tap filters. The filters operate on the symbols in the frequency domain, accepting frequency domain representations of the received symbols. The equalizer also includes a reference symbol generator that provides reference symbols, a coefficient generator that accepts the equalized frequency domain symbols from the digital filter and the reference symbols and updates the filter taps using a received predetermined symbol and the reference symbol. The coefficient generator includes a generator filter having a first and a second adaptation increment, an error generator, and a threshold detector that controls the coefficient generator in response to said error signal. Preferably, the threshold detector determines whether the equalizer output would have been decoded improperly during a synchronization symbol, and if so, enables the use of the second update increment in the generator filter.
摘要翻译：一种用于频域均衡的方法和装置。该方法和装置特别适用于具有周期性地嵌入在传输中的预定符号的多载波传输系统中的接收机中，例如在ADSL系统中。均衡器装置包括具有多个单抽头滤波器的数字滤波器。滤波器对频域中的符号进行操作，接收接收符号的频域表示。均衡器还包括提供参考符号的参考符号发生器，接收来自数字滤波器和参考符号的均衡频域符号的系数发生器，并且使用接收到的预定符号和参考符号来更新滤波器抽头。系数发生器包括具有第一和第二自适应增量的发生器滤波器，误差发生器和响应于所述误差信号控制系数发生器的阈值检测器。优选地，阈值检测器确定均衡器输出是否在同步符号期间被不正确地解码，并且如果是，则使能在生成器滤波器中使用第二更新增量。

10. 发明授权

US06266367B1 Combined echo canceller and time domain equalizer 失效
标题翻译：组合回波消除器和时域均衡器
公开(公告)号：US06266367B1
公开(公告)日：2001-07-24
申请号：US09086395
申请日：1998-05-28
申请人： Jeffrey C. Strait
发明人： Jeffrey C. Strait
IPC分类号： H03H730
CPC分类号： H03H21/0012
摘要： A method and structure that reduces the computational requirements of both echo cancellation and time domain equalization in symmetrical transceivers. The structure exploits pole-zero modeling of both the echo and transmission path response in order to realize an improved level of system performance with shorter filters than would be required with direct FIR modeling.
摘要翻译：减少对称收发器中回波消除和时域均衡的计算要求的方法和结构。该结构利用了回波和传输路径响应的极零建模，以便通过使用简单的FIR滤波器实现系统性能的提高，而不需要直接的FIR建模。

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