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1. 发明授权

US07693124B2 Slot-to-interlace and interlace-to-slot converters for an OFDM system 失效
标题翻译：用于OFDM系统的时隙到交织和交织到时隙转换器
公开(公告)号：US07693124B2
公开(公告)日：2010-04-06
申请号：US11133089
申请日：2005-05-18
申请人： Jai N. Subrahmanyam , Kevin Stuart Cousineau , Michael Mao Wang
发明人： Jai N. Subrahmanyam , Kevin Stuart Cousineau , Michael Mao Wang
IPC分类号： G06F15/16
CPC分类号： H04L5/0048 , H04L5/0007 , H04L25/0226 , H04L27/2602
摘要： In an OFDM system, multiple (M) interlaces are defined for M non-overlapping sets of frequency subbands, and M slots with fixed indices are also defined. Data streams and pilot are mapped to slots, which are in turn mapped to interlaces based on a slot-to-interlace mapping scheme that can achieve frequency diversity and good performance for all slots. At a transmitter, a slot-to-interlace converter maps the slots to the interlaces. The slot-to-interlace converter includes multiple multiplexers and a control unit. The multiplexers map the M slots to the M interlaces based on the slot-to-interlace mapping scheme. The control unit generates at least one control signal for the multiplexers. The multiplexers may be arranged and controlled in various manners depending on the slot-to-interlace mapping scheme. At a receiver, a complementary interlace-to-slot converter maps the interlaces to the slots.
摘要翻译：在OFDM系统中，为M个非重叠的频率子带组定义多个（M）交织，并且还定义具有固定索引的M个时隙。数据流和导频被映射到时隙，这些时隙又被映射到基于可以实现所有时隙的频率分集和良好性能的时隙到交织映射方案的交错。在发射机处，时隙到隔行转换器将时隙映射到交织。时隙到隔行转换器包括多个多路复用器和一个控制单元。多路复用器基于时隙到交错映射方案将M个时隙映射到M个交织。控制单元为多路复用器生成至少一个控制信号。可以根据时隙到交错映射方案以多种方式来布置和控制多路复用器。在接收机处，互补的交错到时隙转换器将交织器映射到时隙。

2. 发明申请

US20080040413A1 IFFT PROCESSING IN WIRELESS COMMUNICATIONS 有权
标题翻译：无线通信中的IFFT处理
公开(公告)号：US20080040413A1
公开(公告)日：2008-02-14
申请号：US11612456
申请日：2006-12-18
申请人： Jai N. Subrahmanyam , Chinnappa K. Ganapathy , Durk L. van Veen , Jinxia Bai , Kevin S. Cousineau , Seokyong Oh
发明人： Jai N. Subrahmanyam , Chinnappa K. Ganapathy , Durk L. van Veen , Jinxia Bai , Kevin S. Cousineau , Seokyong Oh
IPC分类号： G06F15/00
CPC分类号： H04L27/2626
摘要： Techniques for performing IFFT pipelining are described. In some aspects, the pipelining is achieved with a processing system having a memory having first and second sections, an encoder configured to process data in each of the first and second memory sections, an IFFT configured to process the encoded data in the first and second memory sections, and a post-processor configured to process the IFFT processed data in the first memory section while the IFFT is processing the encoded data in the second memory section, the post processor configured to operate at a different clock speed than the encoder or the IFFT.
摘要翻译：描述了用于执行IFFT流水线的技术。在一些方面，流水线通过具有具有第一和第二部分的存储器的处理系统来实现，编码器被配置为处理第一和第二存储器部分中的每一个中的数据;被配置为处理第一和第二部分中的编码数据的IFFT 存储器部分和后处理器，其被配置为在IFFT处理第二存储器部分中的编码数据时处理第一存储器部分中的IFFT处理的数据，后处理器被配置为以与编码器不同的时钟速度操作 IFFT。

3. 发明授权

US07099117B1 Head stack assembly including a trace suspension assembly backing layer and a ground trace for grounding a slider 有权
标题翻译：头部堆叠组件包括一个跟踪悬挂组件背衬层和用于接地滑块的接地轨迹
公开(公告)号：US07099117B1
公开(公告)日：2006-08-29
申请号：US10676537
申请日：2003-09-30
申请人： Jai N. Subrahmanyam , Gopalakrishna Kote , Kathy X. Tang , Loi D. Pham , Jack M. Chue
发明人： Jai N. Subrahmanyam , Gopalakrishna Kote , Kathy X. Tang , Loi D. Pham , Jack M. Chue
IPC分类号： G11B5/596 , G11B5/60
CPC分类号： G11B5/486 , G11B5/4806
摘要： A head stack assembly includes a flex cable assembly. The head stack assembly further includes an actuator arm and a load beam coupled to the actuator arm. The head stack assembly further includes a trace suspension assembly backing layer coupled to the load beam and including a gimbal. The head stack assembly further includes a dielectric layer disposed upon the trace suspension assembly backing layer. The head stack assembly further includes a slider supported by the gimbal. The head stack assembly further includes a ground trace disposed upon the dielectric layer with the dielectric layer between the ground trace and the trace suspension assembly backing layer. The ground trace extends along the actuator arm and is electrically connected to the slider and the flex cable assembly for grounding the slider to the flex cable assembly.
摘要翻译：磁头堆叠组件包括柔性电缆组件。头部堆叠组件还包括致动器臂和联接到致动器臂的负载梁。头部堆叠组件还包括耦合到负载梁并包括万向节的轨迹悬挂组件背衬层。顶部堆叠组件还包括设置在微量悬浮组件背衬层上的电介质层。头部堆叠组件还包括由万向节支撑的滑块。磁头堆叠组件还包括设置在电介质层上的接地轨迹，介电层位于接地轨迹和迹线悬挂组件背衬层之间。接地迹线沿着致动器臂延伸并且电连接到滑块和柔性电缆组件，用于将滑块接地到柔性电缆组件。

4. 发明授权

US07099095B1 Track identification codewords having multiple bit error correction capability and generalized gray code property 有权
标题翻译：具有多个位纠错能力和广义灰度码属性的轨道识别码字
公开(公告)号：US07099095B1
公开(公告)日：2006-08-29
申请号：US10769143
申请日：2004-01-30
申请人： Jai N. Subrahmanyam , Jack M. Chue
发明人： Jai N. Subrahmanyam , Jack M. Chue
IPC分类号： G11B5/09
CPC分类号： G11B20/18 , G11B5/59616 , H03M5/00 , H03M7/16
摘要： The present invention may be embodied in a disk drive comprising a rotating magnetic media having tracks identified by binary codewords, and in a related method. Each track codeword for a particular track within a contiguous band of tracks differs from a track codeword for an adjacent track within the contiguous band of tracks by a defined number of bits, and differs from a track codeword for a nonadjacent track within the contiguous band of tracks by at least the defined number of bits. The defined number N of bits is greater than four such that at least two bit errors may be corrected when reading a track codeword.
摘要翻译：本发明可以实现在包括具有由二进制码字标识的轨道的旋转磁性介质的磁盘驱动器中，并且在相关方法中。用于轨道连续带内的特定轨道的每个轨道码字与轨道的连续频带内的相邻轨道的轨道码字不同，该位置在定义的位数之内，并且不同于在相邻频带内的非相邻轨道的轨道码字轨道至少定义的位数。所定义的位数N大于4，使得当读取轨道码字时可以校正至少两个比特错误。

5. 发明授权

US07050249B1 System and method for processing track identification data in a disk drive 有权
标题翻译：用于处理磁盘驱动器中的磁道标识数据的系统和方法
公开(公告)号：US07050249B1
公开(公告)日：2006-05-23
申请号：US10329157
申请日：2002-12-24
申请人： Jack M. Chue , Jai N. Subrahmanyam
发明人： Jack M. Chue , Jai N. Subrahmanyam
IPC分类号： G11B5/09
CPC分类号： G11B5/59683 , G11B5/59688
摘要： A system and method for processing track identification data in a disk drive having concentric tracks each having a track identification field (TIF) stored in embedded servo sectors, the TIF includes a band segment identifying a group of tracks, and an index segment identifying a single track of the group of tracks. The system and method include reading a servo sector to obtain the TIF, parsing the TIF to obtain the band segment, comparing the obtained band segment to an expected band segment to obtain a band segment differential (BSD), initiating an action if the BSD exceeds a pre-determined threshold and varies from the expected band segment by a predetermined number of bits, initiating another action if the BSD exceeds the predetermined threshold and does not vary from the expected band segment by the predetermined number of bits. The process is then applied to the index segments of the band segment.
摘要翻译：一种用于处理磁盘驱动器中的磁道识别数据的系统和方法，所述磁盘驱动器具有各自具有存储在嵌入式伺服扇区中的磁道识别字段（TIF）的同心磁道，所述TIF包括标识一组磁道的带段和标识单个磁道的索引段轨道组的轨道。该系统和方法包括读取伺服扇区以获得TIF，解析TIF以获得带段，将获得的频带段与预期频带段进行比较以获得频带段差分（BSD），如果BSD超过预定的阈值，并且从预期的频带段变化预定的比特数，如果BSD超过预定的阈值，则启动另一个动作，并且不会从预期的频带段改变预定的比特数。然后将该过程应用于带段的索引段。

6. 发明授权

US07006330B1 Head stack assembly including a ground conductive pad for grounding a slider to a gimbal 有权
标题翻译：头部堆叠组件包括用于将滑块接地到万向接头的接地导电焊盘
公开(公告)号：US07006330B1
公开(公告)日：2006-02-28
申请号：US10386259
申请日：2003-03-10
申请人： Jai N. Subrahmanyam , Darrell D. Palmer
发明人： Jai N. Subrahmanyam , Darrell D. Palmer
IPC分类号： G11B5/48
CPC分类号： G11B5/4826
摘要： A head stack assembly includes an actuator including an actuator arm, a load beam coupled to the actuator arm, and a gimbal coupled to the load beam. The gimbal is formed of an electrically conductive material. The head stack assembly further includes a dielectric layer disposed upon the gimbal. The head stack assembly further includes a slider supported by the gimbal. The head stack assembly further includes slider conductive pads disposed upon the dielectric layer with the dielectric layer interposed between the slider conductive pads and the gimbal. The slider conductive pads are electrically connected to the slider. The head stack assembly further includes a ground conductive pad disposed upon the dielectric layer with the dielectric layer interposed between the ground conductive pad and the gimbal. The ground conductive pad is electrically connected to the slider and the gimbal for electrically grounding the slider.
摘要翻译：头堆叠组件包括致动器，其包括致动器臂，耦合到致动器臂的负载梁和耦合到负载梁的万向节。万向节由导电材料形成。头部堆叠组件还包括设置在万向节上的电介质层。头部堆叠组件还包括由万向节支撑的滑块。顶部堆叠组件还包括设置在电介质层上的滑块导电焊盘，其中介电层置于滑块导电焊盘和万向节之间。滑块导电焊盘电连接到滑块。磁头堆叠组件还包括设置在电介质层上的接地导电焊盘，介电层插在接地导电焊盘和万向节之间。接地导电焊盘电连接到滑动器和万向架，用于使滑块电气接地。

7. 发明授权

US07184230B1 System and method for processing track identifier errors to mitigate head instability in data storage devices 有权
标题翻译：用于处理跟踪标识符错误以缓解数据存储设备中的头部不稳定性的系统和方法
公开(公告)号：US07184230B1
公开(公告)日：2007-02-27
申请号：US10160954
申请日：2002-06-01
申请人： Jack M. Chue , Jai N. Subrahmanyam , Russ A. Quisenberry
发明人： Jack M. Chue , Jai N. Subrahmanyam , Russ A. Quisenberry
IPC分类号： G11B5/02
CPC分类号： G11B5/59605 , G11B5/5547
摘要： A system and method for processing track identifier errors to mitigate head instability in data storage devices is disclosed. The system and method includes computing a track id differential between an expected track id and a received track id, encoding the expected track id and the received track id, initiating a first action if the track id differential exceeds a pre-determined threshold and the encoded expected track id varies from the encoded received track id by a pre-configured number of bits, and initiating a second action if the track id differential does not exceed the pre-determined threshold or the encoded expected track id does not vary from the encoded received track id by a pre-configured number of bits.
摘要翻译：公开了一种用于处理磁道标识符错误以减轻数据存储设备中的磁头不稳定性的系统和方法。该系统和方法包括：计算预期轨迹id和接收轨迹id之间的轨道ID差分，编码预期轨道id和接收轨道id，如果轨道id差异超过预定阈值则启动第一动作，预期轨迹id与编码的接收轨道id相差预先配置的比特数，并且如果轨道id差异不超过预定阈值或编码的预期轨道id不与编码的接收轨道ID由预先配置的位数。

8. 发明授权

US07027256B1 Disk drive having servo sectors that store repeatable runout correction values and related error correction code data 有权
标题翻译：具有伺服扇区的磁盘驱动器，其存储可重复的跳动校正值和相关的纠错码数据
公开(公告)号：US07027256B1
公开(公告)日：2006-04-11
申请号：US10377078
申请日：2003-02-28
申请人： Jai N. Subrahmanyam , Jack M. Chue , Robert J. McNab
发明人： Jai N. Subrahmanyam , Jack M. Chue , Robert J. McNab
IPC分类号： G11B5/596
CPC分类号： G11B5/59627
摘要： A magnetic disk drive having a reduction in repeatable runout (RRO) effects is disclosed. The disk drive has a head disk assembly (HDA) and a sampled servo controller. The HDA includes a rotating magnetic disk, an actuator, and a transducer head. The magnetic disk has a plurality of embedded servo sectors for storing servo information including repeatable runout (RRO) cancellation values and RRO cancellation value error correction code (ECC) data at a servo data rate. The RRO cancellation value ECC data is only for detecting and correcting errors in the RRO cancellation values. In between the embedded servo sectors are data sectors for storing user data at a user data rate that is different from the servo data rate. The actuator positions the transducer head in response to a control effort signal generated by the sampled servo controller based on the servo information.
摘要翻译：公开了具有减少可重复跳动（RRO）效应的磁盘驱动器。磁盘驱动器具有头盘组件（HDA）和采样伺服控制器。 HDA包括旋转磁盘，致动器和换能器头。磁盘具有多个嵌入式伺服扇区，用于以伺服数据速率存储包括可重复跳动（RRO）抵消值和RRO抵消值纠错码（ECC）数据的伺服信息。 RRO抵消值ECC数据仅用于检测和纠正RRO抵消值中的错误。在嵌入式伺服扇区之间是用于以与伺服数据速率不同的用户数据速率存储用户数据的数据扇区。执行器响应于由采样的伺服控制器基于伺服信息产生的控制力信号来定位换能器头。

9. 发明授权

US07006331B1 Head gimbal assembly including a trace suspension assembly backing layer with a conductive layer formed upon a gimbal having a lower oxidation rate 有权
标题翻译：头万向节组件包括具有形成在具有较低氧化速率的万向节上的导电层的痕量悬浮组件背衬层
公开(公告)号：US07006331B1
公开(公告)日：2006-02-28
申请号：US10676538
申请日：2003-09-30
申请人： Jai N. Subrahmanyam , Pierre C. Humbert
发明人： Jai N. Subrahmanyam , Pierre C. Humbert
IPC分类号： G11B5/60
CPC分类号： G11B5/4853 , G11B5/4826 , H05K1/0215 , H05K1/0243 , H05K1/056 , H05K3/305 , H05K3/321 , H05K2201/0347 , H05K2201/10727 , H05K2201/10969
摘要： A head gimbal assembly for a disk drive. The head gimbal assembly includes a trace suspension assembly backing layer including a gimbal. The trace suspension assembly backing layer is formed of a conductive material having a first oxidation rate. The head gimbal assembly further includes a gimbal conductive layer disposed upon the gimbal and formed of a conductive material having a second oxidation rate lower than the first oxidation rate. The head gimbal assembly further includes a slider supported by the gimbal. The head gimbal assembly further includes a conductive compound disposed between the gimbal conductive layer and the slider for electrically grounding the slider to the trace suspension assembly backing layer.
摘要翻译：用于磁盘驱动器的磁头万向架组件。头部万向架组件包括包括万向节的轨迹悬挂组件背衬层。痕量悬浮组件背衬层由具有第一氧化速率的导电材料形成。头万向架组件还包括设置在万向架上的万向导电层，并由具有低于第一氧化速率的第二氧化速率的导电材料形成。头万向架组件还包括由万向节支撑的滑块。头万向架组件还包括设置在万向导电层和滑块之间的导电化合物，用于将滑块电动接地到轨道悬挂组件背衬层。

10. 发明授权

US06972930B1 ESD-protected slider and head gimbal assembly 有权
标题翻译： ESD保护滑块和头万向节组件
公开(公告)号：US06972930B1
公开(公告)日：2005-12-06
申请号：US10377041
申请日：2003-02-28
申请人： Kathy X. Tang , Jai N. Subrahmanyam , Rahmat Karimi
发明人： Kathy X. Tang , Jai N. Subrahmanyam , Rahmat Karimi
IPC分类号： G11B5/127 , G11B5/33 , G11B5/40 , G11B5/48 , G11B21/20
CPC分类号： G11B5/4853 , G11B5/1272 , G11B5/33 , G11B5/40
摘要： A Head Gimbal Assembly (HGA) for use in a disk drive and comprising an ESD-protected slider comprising a head formed on a slider substrate. The slider may comprise an electrical-isolation circuit; an electrically-resistive path between head input connections and the slider; or both isolation circuits and resistive paths for reducing electrostatic charge on the slider while remaining connected during disk drive operations.
摘要翻译：一种用于磁盘驱动器的磁头万向节组件（HGA），包括一个ESD保护的滑块，其包括形成在滑块基板上的磁头。滑动器可以包括电隔离电路; 头部输入连接和滑块之间的电阻路径; 或两个隔离电路和电阻路径，用于在磁盘驱动器操作期间保持连接时减少滑块上的静电电荷。

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