公开(公告)号：US06771929B1

公开(公告)日：2004-08-03

申请号：US09693719

申请日：2000-10-20

Applicant: Dennis A. Nivens ,  David A. Wright

Inventor： Dennis A. Nivens ,  David A. Wright

IPC: H04B7185

CPC classification number: H04B7/18517

Abstract: A method and apparatus for closed-loop power threshold leveling for a satellite communication system is provided. A preferred embodiment of the present invention includes a user earth terminal (UET) (140), a satellite (120) and a network control center (NCC) (110). The satellite (120) periodically determines an average error rate for data bursts transmitted by a plurality of UETs (140) and sends the average error rate as well as the number of transmitted data bursts to the NCC (110). The NCC (110) accumulates average error rates over a period of time, and when a predetermined number of data bursts has been surpassed, determines an uplink power threshold adjustment based on the average error rates. The NCC (110) then transmits the uplink power threshold adjustment to the satellite (120), which adjusts an on-board uplink power level threshold in response to the uplink power threshold adjustment. In systems using multiple beams, the satellite (120) maintains a separate uplink power level threshold for each beam, and determines a separate average error rate for each beam. The NCC (140) then determines and transmits a separate uplink power threshold adjustment for each beam. In systems using multiple coding levels, the satellite (120) determines separate error rates for each coding level, and the NCC (110) determines uplink power offset adjustment corresponding to each coding level. The NCC (110) then delivers the uplink power offset adjustments to the UETs (140), which update their local power offset values stored in memory.

Abstract translation: 提供了一种用于卫星通信系统的闭环功率阈值调平的方法和装置。 本发明的优选实施例包括用户接地终端（UET）（140），卫星（120）和网络控制中心（NCC）（110）。 卫星（120）周期性地确定由多个UET（140）发送的数据突发的平均错误率，并将平均错误率以及发送的数据突发数量发送到NCC（110）。 NCC（110）在一段时间内累积平均错误率，并且当超过预定数量的数据突发时，基于平均错误率来确定上行链路功率阈值调整。 NCC（110）然后向卫星（120）发送上行链路功率阈值调整，该卫星响应于上行链路功率阈值调整来调整板载上行链路功率电平阈值。 在使用多个波束的系统中，卫星（120）为每个波束保持单独的上行链路功率电平门限，并且确定每个波束的单独的平均误码率。 然后，NCC（140）确定并发送用于每个波束的单独的上行链路功率阈值调整。 在使用多个编码电平的系统中，卫星（120）确定每个编码电平的单独错误率，并且NCC（110）确定对应于每个编码电平的上行链路功率偏移调整。 NCC（110）然后将上行链路功率偏移调整传递给UET（140），UET更新其存储在存储器中的本地功率偏移值。

公开(公告)号：US06704297B1

公开(公告)日：2004-03-09

申请号：US09644588

申请日：2000-08-23

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

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

IPC: H04B700

CPC classification number: H04B7/18515

Abstract: A downlink orderwire integrator (63) and separator (81) for use in a processing satellite (12) and a user terminal (14) in a satellite based communications system (10) is provided having a formatter (64), a cell switch (72) and a cell sieve (80). The formatter (64) generates orderwire cells (54) with each orderwire cell (54) having a header (60) and a body (62). The cell switch (72) receives the orderwire cells (54) from the formatter (64) and traffic cells (56) from at least one uplink (16) and arranges the orderwire cells (54) and the traffic cells (52) in at least one frame (48) to transmit on at least one downlink (18). The frame (48) includes a fixed custom frame portion (42) and a fixed traffic portion (50) that contains both the traffic cells (52) and the orderwire cells (54). The cell sieve (80) receives at least one frame (48) from the at least one downlink (18) and separates the traffic cells (52) and the orderwire cells (54) from the traffic portion (50), such that the formatter (64) and cell switch (72) are positioned within the processing satellite (12) and the cell sieve (80) is positioned within the user terminal (14).

Abstract translation: 提供了一种用于卫星通信系统（10）中的处理卫星（12）和用户终端（14）中的下行链路顺序集成器（63）和分离器（81），其具有格式器（64），小区开关 72）和细胞筛（80）。 格式器（64）产生有序线电池单元（54），每个单线单元（54）具有头部（60）和主体（62）。 小区交换机（72）从格式器（64）和来自至少一个上行链路（16）的业务信元（56）接收订单线路单元（54），并且将订单线路单元（54）和业务单元（52）布置在 至少一个帧（48）在至少一个下行链路（18）上传输。 帧（48）包括固定的定制帧部分（42）和包含业务信元（52）和有线单元（54）的固定业务部分（50）。 细胞筛（80）从至少一个下行链路（18）接收至少一个帧（48），并将业务信元（52）和有线单元（54）与业务部分（50）分离，使得格式化器 （64）和小区开关（72）位于处理卫星（12）内，并且小区筛（80）位于用户终端（14）内。

公开(公告)号：US06452962B1

公开(公告)日：2002-09-17

申请号：US09330441

申请日：1999-06-11

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

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

IPC: H04B169

CPC classification number: H04B7/18513

Abstract: In a cellular satellite system such as Astrolink, where same frequency, same polarization (same “color”) signals are used in multiple ground cells, there exists the possibility of interference and false reception of uplink Synchronization Bursts (SB) in systems employing TDMA access of the frequency in question. In such systems, a SB transmitted from one terminal may be received in more than one satellite beam. The reception of the signal from a terminal in an undesired beam (330) is erroneous and may adversely impact the time synchronization (360) of the desired terminal. For example, a system may employ Maximal Length (ML) Pseudo-Noise (PN) sequences (410) for its SBs wherein every beam may use the same sequence. To minimize false reception, the ML PN sequences (410) of each SB may be cyclicly shifted a different amount for each beam to generate sequences (410, 420) having low corsscorrelation with each other. By choosing ML PN codes having low crosscorrelation (410, 420) for the different beams, the interference from undesired beams may be minimized (530).

Abstract translation: 在诸如Astrolink的蜂窝卫星系统中，在多个接地小区中使用相同的频率，相同的极化（相同的“彩色”）信号，在采用TDMA接入的系统中存在上行同步突发（SB）的干扰和错误接收的可能性 的频率。 在这样的系统中，从一个终端发送的SB可以在多于一个的卫星波束中被接收。 来自不期望的波束（330）中的终端的信号的接收是错误的并且可能不利地影响期望的终端的时间同步（360）。 例如，系统可以为其SB使用最大长度（ML）伪噪声（PN）序列（410），其中每个波束可以使用相同的序列。 为了最小化错误接收，每个SB的ML PN序列（410）可以针对每个波束循环移位不同的量，以产生彼此具有低相关性的序列（410,420）。 通过选择对于不同波束具有低互相关（410,420）的ML PN码，可以最小化不期望波束的干扰（530）。

公开(公告)号：US06434361B1

公开(公告)日：2002-08-13

申请号：US09408261

申请日：1999-09-29

Applicant: Dominic P. Carrozza ,  Vincent C. Moretti ,  David A. Wright ,  Gregory S. Caso

Inventor： Dominic P. Carrozza ,  Vincent C. Moretti ,  David A. Wright ,  Gregory S. Caso

IPC: H04B7185

CPC classification number: H04L7/042 ,  H04B7/2125

Abstract: A synchronization burst processor (56) used in a processing satellite (12) in a satellite based communications system (10) is provided with a sync burst memory (72), a first double correlator (74), a second double correlator (76) and a modulus module (78). The sync burst memory (72) stores at least one sync burst (52) transmitted from a terrestrial terminal (14) to the processing satellite (12) where the sync burst (52) is formed from a quadrature pair sample set {p, q}. The first double correlator (74) performs an early correlation and a late correlation of the p samples relative to a sync burst slot (50) to generate an early correlation Pe and a late correlation Pl. The second double correlator (76) performs an early correlation and a late correlation of the q samples relative to the sync burst slot (50) to generate an early correlation Qe and a late correlation Ql. The modulus module (78) determines an early modulus Re and a late modulus Rl from the early correlations Pe and Qe and from the late correlations Pl and Ql. The early modulus Re and the late modulus Rl are used to determine if the sync burst (52) is present in the sync burst slot (50) and if the sync burst (52) is early or late relative to the sync burst slot (50).

Abstract translation: 在基于卫星的通信系统（10）中的处理卫星（12）中使用的同步突发处理器（56）具有同步脉冲串存储器（72），第一双相关器（74），第二双相关器（76） 和模数模块（78）。 同步突发存储器（72）存储从地面终端（14）发送到处理卫星（12）的至少一个同步脉冲串（52），其中同步脉冲串（52）由正交对采样集{p，q }。 第一双相关器（74）执行相对于同步突发时隙（50）的p个样本的早期相关和后期相关，以产生早期相关Pe和晚期相关性P1。 第二双相关器（76）执行相对于同步脉冲串时隙（50）的q个样本的早期相关和晚期相关，以产生早期相关Qe和晚期相关Q1。 模量模块（78）从早期相关性Pe和Qe以及从晚期相关性P1和Q1确定早期模量Re和后期模量R1。 早期模数Re和延迟模数R1用于确定同步脉冲串（52）是否存在于同步脉冲串时隙（50）中，并且如果同步脉冲串（52）相对于同步脉冲串时隙（50）早或晚 ）。

公开(公告)号：US06430418B1

公开(公告)日：2002-08-06

申请号：US09596344

申请日：2000-06-19

Applicant: Dennis A. Nivens ,  David A. Wright ,  Michael S. Munoz ,  Gregory S. Caso ,  Scott A. Stephens

Inventor： Dennis A. Nivens ,  David A. Wright ,  Michael S. Munoz ,  Gregory S. Caso ,  Scott A. Stephens

IPC: H04B700

CPC classification number: H04B7/18543 ,  H04B7/18513

Abstract: A method and system for controlling uplink power in a satellite communication system using error leveling is provided. The uplink power control system for a satellite communication system of a preferred embodiment of the present invention comprises a communication satellite (101) and at least one UET (105). The communication satellite (101) includes an error detector (211) and a comparator (215). The UET (105) includes a receiver (206) for receiving an error indicator signal from the comparator (215), and a power profile processor (216) for controlling the transmit power level of the particular chanslot being used by the UET in response to the error indicator. A preferred method for controlling the transmit power level of a particular chanslot assigned to a UET in a satellite communication system in accordance with the present invention includes determining an error count for an uplink data signal received from the UET in the chanslot (403), and comparing the error count to a predetermined error threshold (404). The method further includes generating an error indicator signal for the chanslot in response to the comparison (405), and controlling the transmit power level of the particular chanslot in response to the error indicator (409, 410).

Abstract translation: 提供了一种使用误差校正在卫星通信系统中控制上行链路功率的方法和系统。 本发明优选实施例的用于卫星通信系统的上行链路功率控制系统包括通信卫星（101）和至少一个UET（105）。 通信卫星（101）包括误差检测器（211）和比较器（215）。 UET（105）包括用于从比较器（215）接收错误指示符信号的接收器（206）和用于响应于UET而被UET使用的特定车厢的发射功率电平的功率配置文件处理器（216） 错误指示器。 根据本发明的用于控制分配给卫星通信系统中的UET的特定信道的发射功率电平的优选方法包括确定从信道（403）中的UET接收的上行链路数据信号的误差计数，以及 将误差计数与预定误差阈值进行比较（404）。 所述方法还包括响应于所述比较（405）生成所述信道的错误指示符信号，以及响应于所述错误指示符（409,410）来控制所述特定信道的发射功率电平。

公开(公告)号：US06366776B1

公开(公告)日：2002-04-02

申请号：US09408225

申请日：1999-09-29

Applicant: David A. Wright ,  Reginald Jue ,  Stuart T. Linsky ,  Dennis A. Nivens

Inventor： David A. Wright ,  Reginald Jue ,  Stuart T. Linsky ,  Dennis A. Nivens

IPC: H04Q720

CPC classification number: H04B7/18513

Abstract: Coordination of processing satellite uplink transmission and downlink transmission is achieved by an uplink encoder (418) and uplink modulator (420) which incorporate an adjustable IF amplifier (417) at a ground terminal (400). Information about data traffic transmission errors detected in a satellite (100) is formed into ATM traffic report cells by a cell former (157). The traffic report cells are sent on the downlink to the ground terminal. The traffic report cells are used to adjust the power level of the IF amplifier for the particular channel and slot for which errors were detected.

Abstract translation: 处理卫星上行链路传输和下行链路传输的协调通过在接地终端（400）处并入有可调节IF放大器（417）的上行链路编码器（418）和上行链路调制器（420）来实现。 关于在卫星（100）中检测到的数据业务传输错误的信息由小区形成器（157）形成为ATM业务报告小区。 业务报告小区在下行链路上发送到接地终端。 业务报告单元用于调整用于特定信道和时隙的IF放大器的功率电平，该信道和时隙检测到错误。

公开(公告)号：US6120355A

公开(公告)日：2000-09-19

申请号：US145872

申请日：1998-09-03

Applicant: Hermann J. Stadtfeld ,  James J. Gnadt ,  William D. McGlasson ,  Anthony J. Norselli ,  David A. Wright

Inventor： Hermann J. Stadtfeld ,  James J. Gnadt ,  William D. McGlasson ,  Anthony J. Norselli ,  David A. Wright

IPC: B23F19/02 ,  B23F23/12 ,  F16H55/22 ,  G01M13/02 ,  B24B1/00

CPC classification number: G01M13/021 ,  B23F19/025

Abstract: A machine for lapping or testing gears comprising a single machine column having a first side oriented perpendicular to a second side with the first side having a first workpiece spindle rotatable about a first axis and the second spindle having a second workpiece spindle rotatable about a second axis. The first workpiece spindle is movably secured to the first side and the second workpiece spindle is movably secured to the second side. The first and second workpiece spindles are movable with respect to one another along one or more of mutually perpendicular directions G, H and V. At least one, and preferably both, of the spindles are direct drive spindles. At any relative position of the spindles and their associated gear members along the G, H and V directions, the crossing points of their respective axes remains the same. For lapping, the machine further includes means to introduce lapping compound at the toe end of one of the members rotating in mesh at a location before the point of mesh.

Abstract translation: 一种用于研磨或测试齿轮的机器，包括具有垂直于第二侧定向的第一侧的单个机床，所述第一侧具有可绕第一轴线旋转的第一工件主轴，并且所述第二主轴具有可围绕第二轴线旋转的第二工件主轴 。 第一工件主轴可移动地固定到第一侧，第二工件主轴可移动地固定到第二侧。 第一和第二工件主轴可以沿着相互垂直的方向G，H和V的一个或多个相对于彼此移动。至少一个，优选两个主轴是直接驱动主轴。 在主轴及其相关联的齿轮构件沿G，H和V方向的任何相对位置处，它们各自轴线的交叉点保持相同。 为了研磨，该机器还包括在网状点之前的位置处以网状旋转的构件之一的脚尖端部引入研磨复合物的装置。

公开(公告)号：US5609058A

公开(公告)日：1997-03-11

申请号：US251552

申请日：1994-05-31

Applicant: James J. Gnadt ,  David A. Wright

Inventor： James J. Gnadt ,  David A. Wright

IPC: G01B21/16 ,  B23F19/02 ,  G01M13/02

CPC classification number: B23F19/02 ,  B23F19/025 ,  G01M13/021

Abstract: A method of determining backlash wherein one member of a gearset is rotated in a first direction and rotary positions are recorded at predetermined increments. The rotary positions of the other member of the gearset are recorded simultaneously with those of the one member. The direction of rotation of the one member is reversed and rotary positions are recorded at the same increments while simultaneously recording the rotary positions of the other member. The difference in recorded positions for the other member are calculated thus representing the amount of gearset backlash.

Abstract translation: 一种确定齿隙的方法，其中齿轮组的一个部件沿第一方向旋转，旋转位置以预定的增量被记录。 齿轮组的另一部件的旋转位置与一个部件的旋转位置同时记录。 一个构件的旋转方向相反，并且旋转位置以相同的增量记录，同时记录另一个构件的旋转位置。 计算另一个成员的记录位置的差异，从而代表齿轮齿间隙的量。

公开(公告)号：US5388787A

公开(公告)日：1995-02-14

申请号：US155839

申请日：1993-11-23

Applicant: David B. Webb ,  David A. Wright

Inventor： David B. Webb ,  David A. Wright

IPC: B64D17/62 ,  B64D17/02 ,  B64D17/08 ,  B64D17/14 ,  B64D17/18

CPC classification number: B64D17/62

Abstract: This invention relates to annular canopy parachutes having a central cap canopy, in critically spaced arrangement at the central main vent, which assists in providing rapid controlled inflation and decreasing oscillation upon inflation as to allow incorporation of high drag coefficient, generally air impermeable canopy fabric.

Abstract translation: 本发明涉及具有中央盖罩的环形顶盖降落伞，其在中央主通风口处具有严格间隔的布置，其有助于提供快速控制的充气和减少膨胀时的振荡，以允许结合高阻力系数，通常为不透气的冠层织物。

公开(公告)号：US5345689A

公开(公告)日：1994-09-13

申请号：US977437

申请日：1993-02-25

Applicant: David R. McMurtry ,  David A. Wright ,  Stephen E. Lummes

Inventor： David R. McMurtry ,  David A. Wright ,  Stephen E. Lummes

IPC: G01B5/00 ,  G01B3/00 ,  G01B5/012 ,  G01B5/016 ,  G01B11/00 ,  G01B21/00

CPC classification number: G01B5/012 ,  G01B11/007 ,  G01B3/008

Abstract: A measuring probe comprises a stylus-carrying member on which a stylus is magnetically retained. The carrying member is supported on a flat diaphragm spring for tilting movement relative to an intermediate member. The intermediate member is supported on two further diaphragms for linear movement relative to a housing. The spring rates of diaphragm and further diaphragms are chosen to give the probe the desired relative force/displacement characteristics in X,Y and Z.

Abstract translation: PCT No.PCT / GB92 / 00932 Sec。 371日期：1993年2月25日 102（e）日期1993年2月25日PCT提交1992年5月22日PCT公布。 WO92 / 21932 PCT出版物 日期：1992年12月10日。测量探头包括触针承载构件，触针被磁力保持在该触针构件上。 承载构件支撑在平坦的膜片弹簧上，用于相对于中间构件倾斜运动。 中间构件被支撑在两个另外的隔膜上，用于相对于壳体线性运动。 选择膜片和其他膜片的弹簧速率，以使探头在X，Y和Z中具有所需的相对力/位移特性。