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1. 发明授权

US6031672A Method and apparatus for servo data pattern detection 失效
标题翻译：伺服数据模式检测方法及装置
公开(公告)号：US6031672A
公开(公告)日：2000-02-29
申请号：US767970
申请日：1996-12-17
申请人： Mark Andrew Bergquist , Jonathan Darrel Coker , Richard Leo Galbraith , Rick Allen Philpott , David James Stanek
发明人： Mark Andrew Bergquist , Jonathan Darrel Coker , Richard Leo Galbraith , Rick Allen Philpott , David James Stanek
IPC分类号： G11B5/596 , G11B21/10 , G11B5/09
CPC分类号： G11B21/10 , G11B5/59605 , G11B5/59633
摘要： Methods and apparatus are provided for detecting servo information in a direct access storage device. A plurality of data symbols are read from a disk to produce a readback signal. Each data symbol and each sequence of data symbols contains servo identification information. A correlation filter provides a matched filter function of an expected readback signal of the plurality of data symbols to produce a correlated readback signal. A threshold detector is coupled to the correlation filter for identifying a threshold signal representative of the data symbol. A data separator responsive to the threshold detector windows the threshold signal and provides clock and data signals. The data separator includes a digital variable frequency oscillator (VFO) which optimally centers incoming servo information from the disk in a timing window and provides standard clocked data for a servo processor. The threshold detector has a variable threshold voltage that is programmed using a trim digital-to-analog converter (DAC).
摘要翻译：提供了用于在直接存取存储装置中检测伺服信息的方法和装置。从盘读取多个数据符号以产生回读信号。每个数据符号和每个数据符号序列都包含伺服识别信息。相关滤波器提供多个数据符号的预期回读信号的匹配滤波器函数以产生相关回读信号。阈值检测器耦合到相关滤波器，用于识别表示数据符号的阈值信号。响应于阈值检测器的数据分离器将阈值信号扫描并提供时钟和数据信号。数据分离器包括数字可变频率振荡器（VFO），其在定时窗口中最佳地对来自盘的输入伺服信息进行中心，并为伺服处理器提供标准时钟数据。阈值检测器具有使用微调数模转换器（DAC）编程的可变阈值电压。

2. 发明授权

US06377635B1 Method and apparatus for viterbi detection of generalized partial response signals using partial matched filter and matched filter metrics 有权
标题翻译：使用部分匹配滤波器和匹配滤波器度量的维特比检测广义部分响应信号的方法和装置
公开(公告)号：US06377635B1
公开(公告)日：2002-04-23
申请号：US09697467
申请日：2000-10-26
申请人： Roy Daron Cideciyan , Jonathan Darrel Coker , Evangelos S. Eleftheriou , Richard Leo Galbraith , David James Stanek
发明人： Roy Daron Cideciyan , Jonathan Darrel Coker , Evangelos S. Eleftheriou , Richard Leo Galbraith , David James Stanek
IPC分类号： H03D100
CPC分类号： H04L1/0054 , H04L25/497
摘要： Methods and apparatus are provided for implementing high-speed and area efficient architectures for Viterbi detection of generalized partial response signals using both partial matched filter and matched filter metrics. In the method of the invention, branch metric terms are transformed to shift all time varying terms and some constant terms after an add compare select (ACS) unit. The total number of non-zero constants on trellis branches is minimized. The shifted time varying terms and the shifted constant terms are added directly to state metric terms. The time varying terms are expressed as outputs Zn of a partial matched filter or as outputs Wn of a matched filter. For a given generalized partial response target, the time-invariance property of the Viterbi detector enables identifying the minimum number of non-zero constants on trellis branches without resorting to heuristics. The time-invariance property holds for Viterbi detectors that process multiple samples per trellis-branch, thus allowing implementations at any desired speed.
摘要翻译：提供了用于实现高速和区域有效的架构的方法和装置，用于使用部分匹配滤波器和匹配滤波器度量来维持广义部分响应信号的维特比检测。在本发明的方法中，在加法比较选择（ACS）单元之后，分支度量项被变换以移位所有时变项和一些常数项。网格分支上的非零常数的总数最小化。移位的时变项和移位的常数项直接添加到状态度量项。时变项表示为部分匹配滤波器的输出Zn或匹配滤波器的输出Wn。对于给定的广义部分响应目标，维特比检测器的时间不变特性使得能够在不采用启发式的情况下识别网格分支上的非零常数的最小数量。维特比检测器的时不变性属性适用于每个网格分支处理多个样本，从而允许以任何所需速度进行实现。

3. 发明授权

US06901119B2 Method and apparatus for implementing soft-input/soft-output iterative detectors/decoders 失效
标题翻译：用于实现软输入/软输出迭代检测器/解码器的方法和装置
公开(公告)号：US06901119B2
公开(公告)日：2005-05-31
申请号：US09792325
申请日：2001-02-22
申请人： Roy Daron Cideciyan , Jonathan Darrel Coker , Ajay Dholakia , Evangelos S. Eleftheriou , Richard Leo Galbraith , Thomas Mittelholzer , David James Stanek
发明人： Roy Daron Cideciyan , Jonathan Darrel Coker , Ajay Dholakia , Evangelos S. Eleftheriou , Richard Leo Galbraith , Thomas Mittelholzer , David James Stanek
IPC分类号： G11B20/10 , G11B20/18 , H03M13/11 , H03M13/41 , H03M13/45 , H04L27/06 , H03D1/00
CPC分类号： H03M13/3905 , G11B20/10046 , G11B20/10055 , G11B20/10212 , G11B20/10287 , G11B20/10296 , G11B20/18 , H03M13/1102 , H03M13/2957 , H03M13/3961 , H03M13/4107 , H03M13/45 , H03M13/6331 , H03M13/6343 , H03M13/6502
摘要： A method and apparatus are provided for implementing soft-input soft-output iterative detectors/decoders. Soft-input information is added directly to incoming channel samples. Input signals comprising the received incoming channel samples with the added soft-input information are detected using a detector trellis. Branch metric terms are transformed to shift all time varying terms with the added soft-input information and some constant terms after an add compare select (ACS) unit. The shifted time varying terms with the added soft-input information and the shifted constant terms are added directly to state metric terms. The soft-input information is added directly to incoming channel samples and the computation of branch metrics is not affected. This allows optimization of a dual-max detector and soft-input soft-output Viterbi detector architectures to minimize hardware complexity and power consumption.
摘要翻译：提供了一种用于实现软输入软输出迭代检测器/解码器的方法和装置。软输入信息直接添加到输入信道样本。使用检测器网格来检测包括所接收的输入信道样本与附加的软输入信息的输入信号。转换分支度量项，以在添加的比较选择（ACS）单元之后用所添加的软输入信息和一些常数项来移位所有时变项。随着添加的软输入信息和移位常数项的移位的时变项直接添加到状态度量项。软输入信息直接添加到输入信道样本，并且分支度量的计算不受影响。这允许优化双最大检测器和软输入软输出维特比检测器架构，以最小化硬件复杂性和功耗。

4. 发明授权

US06373906B1 Method and apparatus for Viterbi detection of generalized partial response signals including two-way add/compare/select for improved channel speed 有权
标题翻译：用于维特比检测广义部分响应信号的方法和装置，包括双向加法/比较/选择以提高通道速度
公开(公告)号：US06373906B1
公开(公告)日：2002-04-16
申请号：US09768802
申请日：2001-01-24
申请人： Roy Daron Cideciyan , Jonathan Darrel Coker , Evangelos S. Eleftheriou , Richard Leo Galbraith , Allen Prescott Haar , Frank Ray Keyser, III , David James Stanek
发明人： Roy Daron Cideciyan , Jonathan Darrel Coker , Evangelos S. Eleftheriou , Richard Leo Galbraith , Allen Prescott Haar , Frank Ray Keyser, III , David James Stanek
IPC分类号： H04L2706
CPC分类号： H04L1/0054 , H04L25/497
摘要： Apparatus is provided for implementing high-speed and area efficient architectures for Viterbi detection of generalized partial response signals including two-way add/compare/select for improved channel speed. The two-way add/compare/select includes a two-way compare for comparing first and second state metric input values and a pair of two-way adds in parallel with the two-way compare for respectively adding the first and second state metric input values with a second input value. The second input value includes a time varying term or a constant term. The time varying terms are expressed as outputs Zn of a partial matched filter or as outputs Wn of a matched filter. A multiplexer is coupled to the pair of two-way adds, the multiplexer receiving a selectable input controlled by the two-way compare. A pair of shifts coupled between the pair of two-way adds and the multiplexer receive a shift control input for providing metric bounding to avoid underflow. The two-way compare for comparing first and second state metric input values can include a hard shift for providing an add for the first state metric input value and then a compare between a resultant first state metric input value and the second state metric input value.
摘要翻译：提供了用于实现用于维特比检测广义部分响应信号的高速和区域高效架构的装置，包括用于改善信道速度的双向加法/比较/选择。双向加法/比较/选择包括用于比较第一和第二状态度量输入值的双向比较以及用于分别添加第一和第二状态度量输入的双向比较并行的一对双向加法具有第二个输入值的值。第二输入值包括时变项或常数项。时变项表示为部分匹配滤波器的输出Zn或匹配滤波器的输出Wn。多路复用器耦合到一对双向加法器，多路复用器接收由双向比较控制的可选输入。耦合在一对双向加法器和多路复用器之间的一对移位器接收用于提供度量限制以避免下溢的移位控制输入。用于比较第一和第二状态度量输入值的双向比较可以包括用于为第一状态度量输入值提供加法，然后在得到的第一状态度量输入值与第二状态度量输入值之间进行比较的硬移位。

5. 发明授权

US07643536B2 Asynchronus communication system for remote monitoring of objects or an environment 有权
标题翻译：异步通信系统用于远程监控对象或环境
公开(公告)号：US07643536B2
公开(公告)日：2010-01-05
申请号：US10915576
申请日：2004-08-10
申请人： Timothy Michael Schaefer , Jonathan Darrel Coker , Rick Allen Philpott , Edward Brian Welch , David R. Holmes, III
发明人： Timothy Michael Schaefer , Jonathan Darrel Coker , Rick Allen Philpott , Edward Brian Welch , David R. Holmes, III
IPC分类号： H04B1/00
CPC分类号： H04B1/707 , H04J13/16
摘要： A system provides for remote monitoring using asynchronous code division multiple access (CDMA) communication techniques between a base station and one or more transponders. Each transponder is attached or otherwise associated with an object or an environment to be monitored. Upon receipt of an interrogation signal, a transponder generates and transmits a coded transponder signal containing the monitored data. The coded transponder signal is generated using a spreading code. Each transponder is associated with a unique, mutually exclusive set of spreading codes. Each spreading code is based on a unique transponder address and the monitored data to be sent. A detector asynchronously monitors received signals for any of the available spreading codes. Once the detector detects a particular spreading code, the base station can identify the source transponder and extract the monitored data.
摘要翻译：一种系统提供了在基站和一个或多个转发器之间使用异步码分多址（CDMA）通信技术的远程监控。每个应答器被连接或以其他方式与要监视的对象或环境相关联。在接收到询问信号时，应答器产生并发送包含监视数据的编码的应答器信号。使用扩展码产生编码的应答器信号。每个转发器与唯一的，相互排斥的扩展码组相关联。每个扩展码基于唯一的应答器地址和要发送的监视数据。检测器异步监视任何可用扩展码的接收信号。一旦检测器检测到特定的扩展码，基站可以识别源应答器并提取监视的数据。

6. 发明授权

US07830948B2 Asynchronous communication system for remote monitoring of objects or an environment 有权
标题翻译：用于远程监控对象或环境的异步通信系统
公开(公告)号：US07830948B2
公开(公告)日：2010-11-09
申请号：US12622539
申请日：2009-11-20
申请人： Timothy Michael Schaefer , Jonathan Darrel Coker , Rick Allen Philpott , Edward Brian Welch , David R. Holmes, III
发明人： Timothy Michael Schaefer , Jonathan Darrel Coker , Rick Allen Philpott , Edward Brian Welch , David R. Holmes, III
IPC分类号： H04L27/30
CPC分类号： H04B1/707 , H04J13/16
摘要： A system provides for remote monitoring using asynchronous code division multiple access (CDMA) communication techniques between a base station and one or more transponders. Each transponder is attached or otherwise associated with an object or an environment to be monitored. Upon receipt of an interrogation signal, a transponder generates and transmits a coded transponder signal containing the monitored data. The coded transponder signal is generated using a spreading code. Each transponder is associated with a unique, mutually exclusive set of spreading codes. Each spreading code is based on a unique transponder address and the monitored data to be sent. A detector asynchronously monitors received signals for any of the available spreading codes. Once the detector detects a particular spreading code, the base station can identify the source transponder and extract the monitored data.
摘要翻译：一种系统提供了在基站和一个或多个转发器之间使用异步码分多址（CDMA）通信技术的远程监控。每个应答器被连接或以其他方式与要监视的对象或环境相关联。在接收到询问信号时，应答器产生并发送包含监视数据的编码的应答器信号。使用扩展码产生编码的应答器信号。每个转发器与唯一的，相互排斥的扩展码组相关联。每个扩展码基于唯一的应答器地址和要发送的监视数据。检测器异步监视任何可用扩展码的接收信号。一旦检测器检测到特定的扩展码，基站可以识别源应答器并提取监视的数据。

7. 发明申请

US20100066506A1 ASYNCHRONOUS COMMUNICATION SYSTEM FOR REMOTE MONITORING OF OBJECTS OR AN ENVIRONMENT 有权
标题翻译：用于远程监测物体或环境的异步通信系统
公开(公告)号：US20100066506A1
公开(公告)日：2010-03-18
申请号：US12622539
申请日：2009-11-20
申请人： Timothy Michael Schaefer , Jonathan Darrel Coker , Rick Allen Philpott , Edward Brian Welch , David R. Holmes, III
发明人： Timothy Michael Schaefer , Jonathan Darrel Coker , Rick Allen Philpott , Edward Brian Welch , David R. Holmes, III
IPC分类号： H04Q5/22 , H04B1/707
CPC分类号： H04B1/707 , H04J13/16
摘要： A system provides for remote monitoring using asynchronous code division multiple access (CDMA) communication techniques between a base station and one or more transponders. Each transponder is attached or otherwise associated with an object or an environment to be monitored. Upon receipt of an interrogation signal, a transponder generates and transmits a coded transponder signal containing the monitored data. The coded transponder signal is generated using a spreading code. Each transponder is associated with a unique, mutually exclusive set of spreading codes. Each spreading code is based on a unique transponder address and the monitored data to be sent. A detector asynchronously monitors received signals for any of the available spreading codes. Once the detector detects a particular spreading code, the base station can identify the source transponder and extract the monitored data.
摘要翻译：一种系统提供了在基站和一个或多个转发器之间使用异步码分多址（CDMA）通信技术的远程监控。每个应答器被连接或以其他方式与要监视的对象或环境相关联。在接收到询问信号时，应答器产生并发送包含监视数据的编码的应答器信号。使用扩展码产生编码的应答器信号。每个转发器与唯一的，相互排斥的扩展码组相关联。每个扩展码基于唯一的应答器地址和要发送的监视数据。检测器异步监视任何可用扩展码的接收信号。一旦检测器检测到特定的扩展码，基站可以识别源应答器并提取监视的数据。

8. 发明授权

US06995938B2 Data recording system with servo pattern having pseudo-noise sequences 失效
标题翻译：具有伪噪声序列的伺服模式的数据记录系统
公开(公告)号：US06995938B2
公开(公告)日：2006-02-07
申请号：US10841034
申请日：2004-05-06
申请人： Jonathan Darrel Coker , David Timothy Flynn , Richard Leo Galbraith
发明人： Jonathan Darrel Coker , David Timothy Flynn , Richard Leo Galbraith
IPC分类号： G11B5/596
CPC分类号： G11B5/59655 , G11B5/59605
摘要： A data recording system uses a recording medium in which the tracks have pseudo-noise (PN) sequences with good autocorrelation properties as servo information for controlling the position of the recording head. A first set of alternating tracks uses a leading pseudo-random binary sequence (PRBS), which is a PN sequence with good autocorrelation properties, and a following PRBS that is cyclically shifted from the leading PRBS. A second set of alternating tracks interleaved with the first set also has a leading PRBS and a following PRBS that is cyclically shifted from the leading PRBS, but the leading PRBS in each of the tracks in the second set is offset along-the-track from the leading PRBS in the tracks of the first set. The head positioning control system uses the leading PRBS to generate a servo timing mark (STM), the cyclic shift to generate track identification (TID), and the following PRBS from adjacent tracks to generate the head position error signal (PES).
摘要翻译：数据记录系统使用其中轨道具有良好自相关特性的伪噪声（PN）序列的记录介质，作为用于控制记录头位置的伺服信息。第一组交替轨道使用前导伪随机二进制序列（PRBS），其是具有良好自相关特性的PN序列，以及从前导PRBS循环移位的以下PRBS。与第一组交织的第二组交替轨迹还具有前导PRBS和从前导PRBS循环移位的后续PRBS，但是第二组中的每个轨道中的前导PRBS沿着轨迹偏移领先的PRBS在第一集的轨道。头部定位控制系统使用前导PRBS来产生伺服定时标记（STM），循环移位以产生轨迹识别（TID），以及来自相邻轨道的后续PRBS以产生头部位置误差信号（PES）。

9. 发明授权

US06937650B2 Method and apparatus for channel equalization with a digital FIR filter using a pseudo random sequence 失效
标题翻译：使用伪随机序列的数字FIR滤波器进行信道均衡的方法和装置
公开(公告)号：US06937650B2
公开(公告)日：2005-08-30
申请号：US09862019
申请日：2001-05-21
申请人： Jonathan Darrel Coker , Richard Leo Galbraith , Eric James Tree
发明人： Jonathan Darrel Coker , Richard Leo Galbraith , Eric James Tree
IPC分类号： G11B20/10 , H04L25/03 , H04K5/159
CPC分类号： G11B20/10212 , G11B20/10009 , G11B20/10046 , H04L25/03038
摘要： A method and apparatus are provided for channel equalization with a digital finite impulse response (DFIR) filter using a pseudo random sequence. A readback signal of a pseudo random bit sequence is obtained. Samples are obtained from the readback signal of the pseudo random bit sequence. Tap gradients are calculated responsive to the obtained samples. The tap weights of the digital finite impulse response (FIR) filter are modified responsive to the calculated tap gradients. Dibit samples and error samples are obtained from the readback signal of the pseudo random bit sequence and applied to a tap gradients calculator. Tap gradients are calculated by a bitwise multiplier and accumulation tap gradient calculation circuit. An attenuation function attenuates the calculated tap gradients by a programmable attenuation value.
摘要翻译：提供了一种使用伪随机序列的数字有限脉冲响应（DFIR）滤波器进行信道均衡的方法和装置。获得伪随机比特序列的回读信号。从伪随机比特序列的回读信号获得样本。根据获得的样品计算抽头梯度。数字有限脉冲响应（FIR）滤波器的抽头权重响应于计算的抽头梯度而被修改。从伪随机比特序列的回读信号获得Dibit样本和误差样本，并应用于抽头梯度计算器。抽头梯度由按位乘法器和累积抽头梯度计算电路计算。衰减功能通过可编程衰减值衰减计算出的抽头梯度。

10. 发明授权

US5784010A Method and apparatus for implementing a set rate code for data channels with alternate 9-bit code words and 8-bit code words 失效
标题翻译：用于实现具有交替的9位代码字和8位代码字的数据通道的设定速率代码的方法和装置
公开(公告)号：US5784010A
公开(公告)日：1998-07-21
申请号：US794718
申请日：1997-02-03
申请人： Jonathan Darrel Coker , David Timothy Flynn , Richard Leo Galbraith , Todd Carter Truax
发明人： Jonathan Darrel Coker , David Timothy Flynn , Richard Leo Galbraith , Todd Carter Truax
IPC分类号： G11B20/14 , H03M7/00
CPC分类号： G11B20/1426 , G11B2020/1434 , G11B2020/1446
摘要： A data encoding method and apparatus are provided for implementing a predefined rate code, such as a 16/17 rate code for a data detection channel in a direct access storage device. A binary data stream is received and sequential symbols of the received binary data stream are identified. Sequential alternate symbols of the binary data stream are encoded into first codewords. Sequential alternate other symbols are encoded into second codewords. The alternating first and second codewords are sequentially combined. For a rate 16/17 rate code, the first codewords include 9-bit codewords and the second codewords include 8-bit codewords. The second 8-bit codewords are either raw symbols of the received binary data stream or remapped symbols of the received binary data stream. All likely error events are limited to within three consecutive bytes in a user data stream with a 16/17 rate code of the preferred embodiment.
摘要翻译：提供了一种数据编码方法和装置，用于实现诸如用于直接访问存储设备中的数据检测通道的16/17速率码的预定速率码。接收二进制数据流，并识别所接收的二进制数据流的顺序符号。二进制数据流的顺序替代符号被编码成第一码字。顺序替代的其他符号被编码成第二码字。交替的第一和第二码字被顺序组合。对于速率16/17速率码，第一码字包括9位码字，第二码字包括8位码字。第二个8位码字是接收的二进制数据流的原始符号或接收的二进制数据流的重新映射的符号。所有可能的错误事件被限制在具有优选实施例的16/17速率代码的用户数据流中的三个连续字节内。

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