公开(公告)号：US06707916B1

公开(公告)日：2004-03-16

申请号：US09270567

申请日：1999-03-16

Applicant: Gregory S. Caso ,  Stuart T. Linsky ,  David A. Wright ,  Donald C. Wilcoxson

Inventor： Gregory S. Caso ,  Stuart T. Linsky ,  David A. Wright ,  Donald C. Wilcoxson

IPC: H04K100

CPC classification number: H04B7/18513

Abstract: A method and apparatus for mitigation of false co-channel uplink reception, also known as show-thru, in an uplink A due to an uplink B at a satellite receiver. The method includes storing multiple scrambling sequences associated with respective individual uplinks, including a scrambling sequence A, receiving uplink A signals at an uplink A receiver, applying scrambling sequence A to the uplink A signals to generate descrambled A data, and then decoding the descrambled A data. The decoding step includes the generation of a decoder failure signal in the event that decoding is unsuccessful, and the method discards the descrambled A data if the decoder failure signal is asserted. Therefore, any show-thru data derived from uplink B will be discarded in the uplink A receiver, and vice versa. The step of applying the scrambling sequence may be effected using an exclusive-or operation.

Abstract translation: 由于在卫星接收机上的上行链路B，在上行链路A中减轻伪同频上行接收（也称为显示）的方法和装置。 该方法包括存储与各个单独上行链路相关联的多个加扰序列，包括加扰序列A，在上行链路A接收机处接收上行链路A信号，向上行链路A信号应用加扰序列A以产生解扰的A数据，然后解码解扰的A 数据。 解码步骤包括在解码不成功的情况下产生解码器故障信号，并且如果解码器故障信号被断言，则该方法丢弃解扰的A数据。 因此，从上行链路B中导出的任何显示数据将在上行链路A接收机中被丢弃，反之亦然。 应用加扰序列的步骤可以使用异或操作来实现。

公开(公告)号：US06512749B1

公开(公告)日：2003-01-28

申请号：US09408041

申请日：1999-09-29

Applicant: David A. Wright ,  Stuart T. Linsky ,  Donald C. Wilcoxson ,  Eldad Perahia ,  Gregory S. Caso

Inventor： David A. Wright ,  Stuart T. Linsky ,  Donald C. Wilcoxson ,  Eldad Perahia ,  Gregory S. Caso

IPC: H04B7185

CPC classification number: H04B7/18515

Abstract: Communication satellite downlink transmitting and reception techniques includes circuitry which groups a predetermined number of data cells with a predetermined error correction code to generate frame bodies. The circuitry also groups the frame bodies with header symbols and trailer symbols to generate data frames. One or more modulators enable the placement of the modulated data frames into a plurality of frequency bands having a predetermined frequency range and a predetermined transmission rate. One or more antennas transmit the modulated data frames over one or more beams with different forms of polarization to other antennas. A demodulator is connected to demodulate the radio carrier signals and the beams into data frames from a plurality of frequency bands. Decoders are connected to decode the frame bodies with header symbols and with trailer symbols from the data frames and to decode four data cells as a group by using a predetermined error correction code.

Abstract translation: 通信卫星下行链路发射和接收技术包括以预定的纠错码对预定数量的数据信元进行分组以产生帧体的电路。 电路还将帧体与头部符号和尾部符号分组以产生数据帧。 一个或多个调制器使得能够将经调制的数据帧放置在具有预定频率范围和预定传输速率的多个频带中。 一个或多个天线将具有不同形式的偏振的一个或多个波束上的经调制的数据帧发射到其他天线。 连接解调器，将无线电载波信号和波束解调成来自多个频带的数据帧。 连接解码器以用头部符号和来自数据帧的尾标符号对帧体进行解码，并通过使用预定的纠错码将四个数据信元解码为一组。

公开(公告)号：US06466569B1

公开(公告)日：2002-10-15

申请号：US09408331

申请日：1999-09-29

Applicant: David A. Wright ,  Stuart T. Linsky ,  Donald C. Wilcoxson ,  Eldad Perahia ,  Gregory S. Caso

Inventor： David A. Wright ,  Stuart T. Linsky ,  Donald C. Wilcoxson ,  Eldad Perahia ,  Gregory S. Caso

IPC: H04Q1104

CPC classification number: H04B7/18513

Abstract: Uplink transmission and reception techniques for a processing satellite including one or more earth terminals 400 connected to receive ATM data cells. One or more encoders 418 are connected to coordinate four data cells with an error correction code to generate data bursts and to coordinate the data bursts with synchronizing bursts to generate data frames. One or more modulators 420 are connected to modulate the data frames by frequency division multiple access modulation to enable placement of the modulated data frames into a plurality of channels. One or more antennas 406 transmit the modulated data frames to a satellite 100 over 48 beams with various forms of polarization. In satellite 100, a receiving multibeam antenna and feed 106 responds to one or more beams of radiocarrier signals having one or more forms of polarization. One or more demodulators 138 demodulate the radio carrier signals into data frames from various channels including a plurality of channel types. One or more decoders 146 decode data bursts and synchronizing bursts from the data frames and decode four data cells from the bursts using error correction code.

Abstract translation: 用于包括连接到接收ATM数据单元的一个或多个接地端子400的处理卫星的上行链路传输和接收技术。 连接一个或多个编码器418以配置具有纠错码的四个数据单元，以产生数据脉冲串，并且以同步脉冲串协调数据脉冲以产生数据帧。 连接一个或多个调制器420以通过频分多址调制来调制数据帧，以便将调制的数据帧放置在多个信道中。 一个或多个天线406通过具有各种形式的偏振的48个波束将经调制的数据帧发射到卫星100.在卫星100中，接收多波束天线和馈送106响应于具有一个或多个形式的极化的一个或多个无线电载波信号波束 。 一个或多个解调器138将无线电载波信号解调为包括多个信道类型的各种信道的数据帧。 一个或多个解码器146解码数据突发并且从数据帧中同步脉冲串，并使用纠错码从脉冲串中解码四个数据信元。

公开(公告)号：US06279132B1

公开(公告)日：2001-08-21

申请号：US09161843

申请日：1998-09-28

Applicant: Stuart T. Linsky ,  David A. Wright ,  Gefferie H. Yee-Madera ,  Donald C. Wilcoxson

Inventor： Stuart T. Linsky ,  David A. Wright ,  Gefferie H. Yee-Madera ,  Donald C. Wilcoxson

IPC: H03M1300

CPC classification number: H04L1/0057 ,  H04L1/0041 ,  H04L1/0059 ,  H04L1/0065 ,  H04L1/0071

Abstract: Information is transmitted in an uplink to a satellite by applying an outer code to an information block to form an outer coded block. The outer coded block is then inner coded when a short block code is applied, thereby producing a concatenated coded block.

Abstract translation: 通过将外部代码应用于信息块来将信息在上行链路中发送到卫星以形成外部编码块。 然后，当应用短块码时，外部编码块被内部编码，从而产生级联的编码块。

公开(公告)号：US06625776B1

公开(公告)日：2003-09-23

申请号：US09163775

申请日：1998-09-30

Applicant: David A. Wright ,  Stuart T. Linsky ,  Donald C. Wilcoxson ,  Eldad Perahia

Inventor： David A. Wright ,  Stuart T. Linsky ,  Donald C. Wilcoxson ,  Eldad Perahia

IPC: H03M1300

CPC classification number: H04L1/0065 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/0025

Abstract: The present invention provides a comprehensive method for controlling, independently, transmit power and coding levels for data transmitted in uplinks and downlinks. One preferred embodiment of the present invention provides a method for adaptive coding of data in a downlink. A data error rate associated with downlink data (e.g., a character error rate provided by a Reed Solomon decoder) is determined. The method, based upon pre-established error rate thresholds, controls the level of coding (e.g., heavy or light) on data in the downlink to achieve a desired data error rate. Heavy coded data is typically associated with a code rate half that of light coded data, and changes between heavy and light coding may be selected using a destination address applied at an originating terminal and interpreted at the satellite.

Abstract translation: 本发明提供了一种用于独立地控制在上行链路和下行链路中传输的数据的发送功率和编码电平的综合方法。 本发明的一个优选实施例提供了一种用于下行链路中的数据的自适应编码的方法。 确定与下行链路数据相关联的数据错误率（例如，由里德所罗门解码器提供的字符错误率）。 该方法基于预先建立的错误率阈值来控制下行链路中的数据上的编码（例如重或轻）的水平以实现期望的数据错误率。 重编码数据通常与光编码数据的码率相关联，并且可以使用在始发终端处应用并在卫星处解释的目的地地址来选择重和轻编码之间的变化。

公开(公告)号：US06272340B1

公开(公告)日：2001-08-07

申请号：US09275594

申请日：1999-03-24

Applicant: David A. Wright ,  Donald C. Wilcoxson

Inventor： David A. Wright ,  Donald C. Wilcoxson

IPC: H04Q720

CPC classification number: H04B7/18513

Abstract: A load shedding method and apparatus to enhance uplink margin between a terrestrial terminal (14) and a satellite (12) in a satellite based communications system (10) is provided. The terrestrial terminal (14) includes a multi-carrier network (40) that generates a plurality of uplink carrier channels. A RF transmit and receive system (48) transmits the plurality of uplink carrier channels to the satellite (12). A terminal control unit (46) determines an attenuation level on the plurality of uplink carrier channels transmitted to the satellite (12). The terminal control unit (46) also instructs the multi-carrier network (40) to increase or decrease the number of uplink carrier channels to be transmitted to the satellite.

Abstract translation: 提供了一种用于在基于卫星的通信系统（10）中增强地面终端（14）和卫星（12）之间的上行链路裕度的减载方法和装置。 地面终端（14）包括产生多个上行链路载波信道的多载波网络（40）。 RF发射和接收系统（48）将多个上行链路载波信道发送到卫星（12）。 终端控制单元（46）确定发送到卫星（12）的多个上行链路载波信道的衰减级别。 终端控制单元（46）还指示多载波网络（40）增加或减少要发射到卫星的上行链路载波信道的数量。

公开(公告)号：US06621801B1

公开(公告)日：2003-09-16

申请号：US09162514

申请日：1998-09-29

Applicant: David A. Wright ,  Jaime L. Prieto ,  Scott L. Wilkinson

Inventor： David A. Wright ,  Jaime L. Prieto ,  Scott L. Wilkinson

IPC: H04B7204

CPC classification number: H04B7/18582

Abstract: A distributed demand assigned multiple access control scheme for use in connection with a processing satellite communications system, where multiple users are assigned to a common transmission resource as part of a sharing set. The control scheme of the invention makes use of a reservation procedure by transmitting set addressed reservation messages in a contentious control flow to reserve data transfer time in a non-contentious main flow. Each user of the sharing set is synchronized to the next available uplink time slot available to transmit data in the main flow. If a transmitted reservation message is returned in the satellite downlink, the terminal knows that all of the users of the set received the message. That reserved time interval in the main flow Is now owned by that user, and each user in the shared set updates its next available uplink time slot based on the reserved time.

Abstract translation: 分配的需求分配多个访问控制方案，用于与处理卫星通信系统结合使用，其中多个用户被分配给作为共享集合的一部分的公共传输资源。 本发明的控制方案通过在有争议的控制流中发送设置的寻址预留消息来利用预留过程，以在非争用主流中保留数据传输时间。 共享集合的每个用户被同步到可用于在主流中传送数据的下一个可用上行链路时隙。 如果在卫星下行链路中返回传输的预留消息，则终端知道该组的所有用户接收到该消息。 主流中的保留时间间隔现在由该用户拥有，共享集中的每个用户根据预留时间更新其下一个可用的上行链路时隙。

公开(公告)号：US06481508B2

公开(公告)日：2002-11-19

申请号：US09730216

申请日：2000-12-05

Applicant: William D. McGlasson ,  David A. Wright ,  Michael W. Roberts ,  Anthony J. Norselli

Inventor： William D. McGlasson ,  David A. Wright ,  Michael W. Roberts ,  Anthony J. Norselli

IPC: B24B2116

CPC classification number: B23F23/006 ,  B23F19/02 ,  B23Q5/04 ,  B23Q11/0032

Abstract: A spindle (60) for a machine tool comprising a rear spindle portion (62) and a forward spindle portion (64) with each of the rear spindle portion and the forward spindle portion being rotatable about the same axis relative to one another. The inventive spindle includes one or more spring elements (68) extending between the rear spindle portion and the forward spindle portion whereby with the forward spindle portion and the rear spindle portion rotating at a predetermined amount and with the rotation of the forward spindle portion being constrained at that amount, an additional rotation applied to the rear spindle portion results in a deflection of the springs thereby effecting a torque between the forward and the rear spindle portions. The present invention also includes a control method which has as its objective to control the position of, not the torque applied to, one of the spindles, usually the gear member spindle. In this method, the gear member spindle position is controlled relative to the pinion member spindle position by a computer numerical control (CNC). As the pinion member is turned at some speed, the gear member is kept in coordination with the pinion (according to their ratio) by the CNC control. The gear member spindle can be commanded to include additional rotational components which, in effect, advance or retard the gear rotation relative to the pinion.

Abstract translation: 一种用于机床的心轴（60），其包括后心轴部分（62）和前心轴部分（64），后心轴部分和前心轴部分中的每一个可相对于彼此绕同一轴线旋转。 本发明的心轴包括一个或多个在后心轴部分和前心轴部分之间延伸的弹簧元件（68），由此通过前心轴部分和后心轴部分以预定量旋转，并且前心轴部分的旋转被约束 以这种量，施加到后心轴部分的附加旋转导致弹簧的偏转，从而实现前和后心轴部分之间的扭矩。 本发明还包括一种控制方法，其目的在于控制施加于其中一个主轴（通常是齿轮构件主轴）的位置而不是扭矩。 在这种方法中，通过计算机数控（CNC）相对于小齿轮主轴位置控制齿轮主轴位置。 当小齿轮部件以某种速度转动时，齿轮部件通过CNC控制与小齿轮（根据它们的比例）保持配合。 齿轮构件主轴可以被命令包括额外的旋转部件，其实际上相对于小齿轮推进或延迟齿轮旋转。

公开(公告)号：US5742769A

公开(公告)日：1998-04-21

申请号：US643727

申请日：1996-05-06

Applicant: Eugene H. Lee ,  Michael Adler ,  Lisa A. Dalton ,  David A. Wright

Inventor： Eugene H. Lee ,  Michael Adler ,  Lisa A. Dalton ,  David A. Wright

IPC: G06Q10/10 ,  G06F17/30

CPC classification number: G06Q10/107

Abstract: A directory service allows a user to receive email messages from senders without requiring the user to reveal his/her email address. The directory service maintains users' email addresses but allows users to restrict the display of their email addresses. The directory service can cause a message to be sent from a sender to a recipient without revealing the recipient's email address.

公开(公告)号：US5374125A

公开(公告)日：1994-12-20

申请号：US915653

申请日：1992-07-21

Applicant: David R. McMurtry ,  David A. Wright

Inventor： David R. McMurtry ,  David A. Wright

IPC: F16C32/06 ,  B23Q1/26 ,  F16C29/02

CPC classification number: F16C32/06 ,  B23Q1/26 ,  F16C29/02 ,  F16C29/025 ,  F16C32/0603

Abstract: A machine is disclosed having novel air bearings for supporting one machine part for translational movement on another part in a first direction X. Each bearing takes the form of a track (5A,14,16) on one of the parts providing concave part-cylindrical bearing surfaces (5A,14A,16A) and pads 25 on the other part providing confronting convex part-cylindrical bearing surfaces 25A. The arc lengths of the part-cylindrical bearing surfaces are such as to provide restraint against relative movements between the machine parts in at least one sense of both of the two directions (Y,Z) orthogonal to the direction (X) of the translational movement. The advantages are relative cheapness of manufacture compared to vee-bearings and a capability of the bearings to self-align under load.

Abstract translation: 公开了一种具有新颖的空气轴承的机器，用于在第一方向X上的另一部分上支撑用于平移运动的一个机器部件。每个轴承在其中一个部件上形成轨道（5A，14,16）的形式，提供凹部分圆柱形 轴承表面（5A，14A，16A）和另一部分上的垫25提供面对的凸形部分圆柱形支承表面25A。 部分圆柱形支承表面的弧长度能够以与平移运动方向（X）正交的两个方向（Y，Z）两个方向的至少一个方向提供机械部件之间相对运动的限制 。 与vee轴承相比，优点是制造相对便宜，并且轴承在负载下自对准的能力。