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。

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。

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.

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。

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。

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。

公开(公告)号：US07020212B1

公开(公告)日：2006-03-28

申请号：US09761519

申请日：2001-01-16

申请人： Jeffrey C. Strait

发明人： Jeffrey C. Strait

IPC分类号： H04K1/10

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。

公开(公告)号：US06847693B1

公开(公告)日：2005-01-25

申请号：US09573498

申请日：2000-05-16

申请人： Jeffrey C. Strait

发明人： Jeffrey C. Strait

IPC分类号： H03L7/091 ,  H04L27/26 ,  H04L7/00

CPC分类号： H04L27/2662 ,  H03L7/091 ,  H04L27/2657 ,  H04L27/2679

摘要： A method and a device for providing timing recovery in a multicarrier transmission system is provided. The data derived timing recovery apparatus with the timing error controller adjusts the sampling rate at the receiver. The data derived timing recovery apparatus uses decision directed carrier phase errors to calculate a phase error. The timing error controller adjusts the sampling rate at the receiver in accordance with the phase error.

摘要翻译： 提供了一种在多载波传输系统中提供定时恢复的方法和装置。 具有定时误差控制器的数据导出定时恢复装置调节接收机的采样率。 数据导出定时恢复装置使用决策导向载波相位误差来计算相位误差。 定时误差控制器根据相位误差调整接收机的采样率。

公开(公告)号：US06438186B1

公开(公告)日：2002-08-20

申请号：US09144840

申请日：1998-08-31

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.

摘要翻译： 一种用于多载波接收机中的符号定时初始化的方法和装置。 该方法使用来自多个单独载波的相位测量来对符号边界进行初始确定。 该方法测量两个载波的相位，优选导频载波和一个相邻载波，并且在补偿与载波上的数据调制相关联的相位失真和由信道施加在载波上的相位失真之后，基于 两个载波之间的相位差。 由于采样偏移导致DFT的二进制位相位偏移，所以检查两个已知符号之间的相位偏移的程度会产生采样偏移，从而产生符号帧索引。

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。