公开(公告)号：US07555512B2

公开(公告)日：2009-06-30

申请号：US10234060

申请日：2002-08-30

申请人： Ying Chen ,  Barrett J Brickner

发明人： Ying Chen ,  Barrett J Brickner

IPC分类号： G06F17/14

CPC分类号： G06F17/142

摘要： A wireless communication technique enables fast Fourier transforms (FFTs) and inverse fast Fourier transforms (IFFTs) to be performed with reduced latency and reduced memory requirements. In particular, an FFT/IFFT unit receives input data representative of a communication symbol. The FFT/IFFT unit applies an FFT operation to the input data to generate intermediate data. The FFT/IFFT unit stores the intermediate data in a random access memory (RAM). The intermediate data stored in the RAM may override data used as input to the FFT operation. The FFT/IFFT unit selectively addresses the RAM to retrieve the intermediate data in a desired output order. For example, the FFT/IFFT unit may output the intermediate data in the same sequential order as the FFT/IFFT unit received the input data.

摘要翻译： 无线通信技术能够实现快速傅里叶变换（FFT）和快速傅里叶逆变换（IFFT），并以较低的延迟和减少的存储器要求来执行。 特别地，FFT / IFFT单元接收表示通信符号的输入数据。 FFT / IFFT单元对输入数据进行FFT运算，生成中间数据。 FFT / IFFT单元将中间数据存储在随机存取存储器（RAM）中。 存储在RAM中的中间数据可以覆盖用作FFT操作的输入的数据。 FFT / IFFT单元选择性地寻址RAM以按期望的输出顺序检索中间数据。 例如，FFT / IFFT单元可以以与FFT / IFFT单元接收到输入数据相同的顺序输出中间数据。

公开(公告)号：US07146134B2

公开(公告)日：2006-12-05

申请号：US10117456

申请日：2002-04-04

申请人： Jaekyun Moon ,  Younggyun Kim ,  Barrett J Brickner ,  Paul C Edwards ,  Michael E Butenhoff

发明人： Jaekyun Moon ,  Younggyun Kim ,  Barrett J Brickner ,  Paul C Edwards ,  Michael E Butenhoff

IPC分类号： H04B17/00

CPC分类号： H04L1/0001 ,  H04B7/0811 ,  H04B7/0814 ,  H04L1/0015 ,  H04L1/206

摘要： An apparatus for dynamic diversity signal reception based upon receiver-side link quality assessments includes two or more antennae. At least one switch is connected to the two or more antennae. A dynamic diversity controller is connected to the at least one switch. The dynamic diversity controller includes a link quality assessor to assess link quality and generate a link characterization value. A diversity configuration selector, responsive to the link characterization value, selectively activates the at least one switch to implement a dynamic diversity configuration. The link quality assessor includes a signal strength analyzer, a modem detector, and/or a MAC layer analyzer to assess the received signal and generate the link characterization value.

公开(公告)号：US06388587B1

公开(公告)日：2002-05-14

申请号：US09476629

申请日：1999-12-31

申请人： Barrett J. Brickner ,  Pradeep R. Padukone

发明人： Barrett J. Brickner ,  Pradeep R. Padukone

IPC分类号： H03M700

CPC分类号： G11B20/10055 ,  G11B20/10009 ,  G11B20/1426 ,  G11B2020/1446 ,  H03M5/145 ,  H03M13/31 ,  H03M13/41 ,  H03M13/4107 ,  H03M13/6331 ,  H03M13/6343

摘要： A data storage channel encoder includes a data word input, a code word output and an encoder. The encoder is coupled between the data word input and the code word output and is adapted to encode successive data words received on the data word input into successive code words on the code word output according to a selected code having combined maximum transition run and parity constraints. The maximum transition run constraint constrains the successive code words such that, when the successive code words are concatenated to form an encoded bit stream, the encoded bit stream has a maximum of one consecutive transition beginning at either odd or even indexed bit positions in the encoded bit stream and a maximum of two consecutive transitions beginning at the other of the odd or even indexed bit positions.

摘要翻译： 数据存储信道编码器包括数据字输入，码字输出和编码器。 编码器耦合在数据字输入和码字输出之间，并且适于根据具有组合的最大转换运行和奇偶校验约束的所选代码将输入的数据字上接收的连续数据字编码到码字输出上的连续代码字中 。 最大过渡运行约束约束连续代码字，使得当连续码字被级联以形成编码比特流时，编码比特流具有从编码的奇数或偶数索引比特位置开始的一个连续转换的最大值 并且在奇数或偶数索引位位置的另一个处开始最多两个连续的转换。

公开(公告)号：US5859601A

公开(公告)日：1999-01-12

申请号：US730716

申请日：1996-10-15

申请人： Jaekyun Moon ,  Barrett J. Brickner

发明人： Jaekyun Moon ,  Barrett J. Brickner

IPC分类号： G11B20/14 ,  H03M5/14 ,  H03M13/31 ,  H03M7/00

CPC分类号： H03M13/31 ,  G11B20/1426 ,  H03M5/145

摘要： Apparatus and method for coding to improve the minimum distance properties of sequence detectors operating at high densities in storage systems is presented. The coding scheme of the present invention is referred to as maximum transition run (MTR) code and eliminates data patterns producing long runs of consecutive transitions while imposing the usual k constraint necessary for timing recovery. The code has a distance gaining property similar to an existing (1,k) runlength-limited (RLL) code, but can be implemented with considerably higher code rates. When the MTR code is used with fixed delay tree search (FDTS) or high order partial response maximum likelihood (PRML) detectors, the bit error rate performance improves significantly over existing combinations of codes and detectors.

摘要翻译： 提出了用于编码以提高在存储系统中以高密度运行的序列检测器的最小距离特性的装置和方法。 将本发明的编码方案称为最大转移运行（MTR）代码，并消除产生长时间连续转换的数据模式，同时施加定时恢复所需的常规k约束。 代码具有类似于现有（1，k）游程长度限制（RLL）代码的距离增益属性，但是可以以相当高的代码速率来实现。 当使用固定延迟树搜索（FDTS）或高阶部分响应最大似然（PRML）检测器的MTR代码时，与现有的代码和检测器组合相比，误码率性能显着提高。

公开(公告)号：US07610019B2

公开(公告)日：2009-10-27

申请号：US11449068

申请日：2006-06-08

申请人： Jaekyun Moon ,  Younggyun Kim ,  Barrett J. Brickner ,  Paul C. Edwards ,  Michael E. Butenhoff

发明人： Jaekyun Moon ,  Younggyun Kim ,  Barrett J. Brickner ,  Paul C. Edwards ,  Michael E. Butenhoff

IPC分类号： H04B17/00

CPC分类号： H04L1/0001 ,  H04B7/0811 ,  H04B7/0814 ,  H04L1/0015 ,  H04L1/206

摘要： An apparatus for dynamic diversity signal reception based upon receiver-side link quality assessments includes two or more antennae. At least one switch is connected to the two or more antennae. A dynamic diversity controller is connected to the at least one switch. The dynamic diversity controller includes a link quality assessor to assess link quality and generate a link characterization value. A diversity configuration selector, responsive to the link characterization value, selectively activates the at least one switch to implement a dynamic diversity configuration. The link quality assessor includes a signal strength analyzer, a modem detector, and/or a MAC layer analyzer to assess the received signal and generate the link characterization value.

摘要翻译： 基于接收机侧链路质量评估的用于动态分集信号接收的装置包括两个或更多个天线。 至少一个开关连接到两个或更多个天线。 动态分集控制器连接到至少一个开关。 动态分集控制器包括链路质量评估者，以评估链路质量并生成链路特征值。 响应于链路特征值的分集配置选择器选择性地激活至少一个交换机以实现动态分集配置。 链路质量评估器包括信号强度分析器，调制解调器检测器和/或MAC层分析器，以评估所接收的信号并产生链路表征值。

公开(公告)号：US07173990B2

公开(公告)日：2007-02-06

申请号：US10141628

申请日：2002-05-06

申请人： Younggyun Kim ,  Farshid R Rad ,  Barrett J Brickner ,  Jaekyun Moon

发明人： Younggyun Kim ,  Farshid R Rad ,  Barrett J Brickner ,  Jaekyun Moon

IPC分类号： H04L1/02 ,  H04L5/12

CPC分类号： H04B7/0848 ,  H04B7/0837 ,  H04L1/06 ,  H04L25/0204 ,  H04L25/03159 ,  H04L25/067 ,  H04L27/38 ,  H04L2025/03414 ,  H04L2025/0342 ,  H04L2025/03426 ,  H04L2027/003 ,  H04L2027/004 ,  H04L2027/0057

摘要： A wireless communication technique enables equalization, soft demapping and phase error estimation functions to be performed jointly based on multiple observations of a transmitted symbol in wireless communication systems employing receive diversity. Multiple observations of a symbol are obtained from multiple antenna paths in a wireless receiver. Equalization, soft demapping and phase error estimation functions can be integrated within shared hardware, rather than distributed among separate hardware blocks, promoting reduced size, complexity and cost in a wireless receiver.

摘要翻译： 无线通信技术使得能够基于采用接收分集的无线通信系统中的传输符号的多个观察来共同执行均衡，软解映射和相位误差估计功能。 从无线接收机中的多个天线路径获得符号的多个观察结果。 均衡，软解映射和相位误差估计功能可以集成在共享硬件中，而不是分布在不同的硬件块之间，从而在无线接收机中促进尺寸减小，复杂度和成本的降低。

公开(公告)号：US5956195A

公开(公告)日：1999-09-21

申请号：US828497

申请日：1997-03-31

申请人： Barrett J. Brickner ,  Jaekyun Moon

发明人： Barrett J. Brickner ,  Jaekyun Moon

IPC分类号： G11B5/596 ,  G11B20/10 ,  G11B20/24 ,  G11B21/08 ,  G11B21/10 ,  G11B5/035 ,  G06F17/10 ,  H03M7/00

CPC分类号： G11B20/10055 ,  G11B20/10009 ,  G11B20/24 ,  G11B21/083 ,  G11B21/106 ,  G11B5/59688

摘要： An information handling system, such as a magnetic disk drive, includes a data channel which has a method and apparatus for detecting binary symbols from a received signal subject to intersymbol interference and additive white Gaussian noise using a three dimensional observation space with orthogonal coordinate axes. Each of three consecutive synchronous observation samples of the received signal corresponding unambiguously to an axis in the observation space. A decision feedback equalizer removes intersymbol interference terms associated with prior detector outputs. A plurality of linear classifiers are used to partition the observation space. The second and/or third sample of the equivalent channel response is constrained relative to the first for the purpose of simplifying the linear classifiers. Boolean logic functions to decide into which decision region of the observation space a sample maps into. Incorporation of modulation coding constraints reduce the probability of error by increasing the Euclidean distance between symbols in the observation space. Symbol estimates are produced synchronously with a delay of two with respect to the current observation sample.

摘要翻译： 诸如磁盘驱动器之类的信息处理系统包括数据通道，该数据通道具有使用具有正交坐标轴的三维观察空间的接收信号进行符号间干扰和加性白高斯噪声来检测二进制符号的方法和装置。 接收信号的三个连续同步观测样本中的每一个明确地对应于观测空间中的轴。 决策反馈均衡器去除与现有检测器输出相关联的符号间干扰项。 多个线性分类器用于分割观察空间。 为了简化线性分类器，等效信道响应的第二和/或第三样本相对于第一样本被约束。 布尔逻辑函数用于决定样本映射到的观测空间的决定区域。 调制编码约束的结合通过增加观察空间中的符号之间的欧氏距离来减小误差的概率。 符号估计与相对于当前观察样本的两个延迟同步产生。