公开(公告)号：US06807397B2

公开(公告)日：2004-10-19

申请号：US10264197

申请日：2002-10-03

申请人： Donald C. D. Chang ,  Kar W. Yung ,  David C. Cheng ,  Urban A. Von Der Embse ,  John I. Novak, III ,  Frank A. Taormina ,  Ming U. Chang

发明人： Donald C. D. Chang ,  Kar W. Yung ,  David C. Cheng ,  Urban A. Von Der Embse ,  John I. Novak, III ,  Frank A. Taormina ,  Ming U. Chang

IPC分类号： H04B7185

CPC分类号： H04B7/18519 ,  B64G1/1007 ,  B64G1/242

摘要： Methods for increasing the efficiency of satellite constellation operations are disclosed. The steps of the present invention comprise calculating the maximum number of communications signals that each satellite in the satellite constellation can generate, determining an operational constraint on each satellite, the operational constraint limiting the number of communications signals that each satellite can radiate substantially simultaneously, determining an operational space for each satellite wherein the operational space is defined using the operational constraint and the calculated number of signals, and using the operational space for each satellite in the constellation to determine the operational point for the constellation.

摘要翻译： 公开了提高卫星星座操作效率的方法。 本发明的步骤包括计算卫星星座中每个卫星可以产生的通信信号的最大数量，确定每个卫星的操作约束，限制每个卫星可基本上同时辐射的通信信号的数量的操作约束，确定 每个卫星的操作空间，其中使用操作约束和所计算的信号数定义操作空间，并且使用星座中的每个卫星的操作空间来确定星座的操作点。

公开(公告)号：US06785553B2

公开(公告)日：2004-08-31

申请号：US09841110

申请日：2001-04-24

申请人： Donald C. D. Chang ,  Kar W. Yung ,  David C. Cheng ,  Ming U. Chang ,  Frank A. Hagen

发明人： Donald C. D. Chang ,  Kar W. Yung ,  David C. Cheng ,  Ming U. Chang ,  Frank A. Hagen

IPC分类号： H04Q720

CPC分类号： G01S19/40 ,  G01S5/14 ,  G01S19/07 ,  G01S19/15 ,  H04B7/18504 ,  H04B7/18532 ,  H04B7/18534

摘要： A method and system for using two-way ranging navigation to accurately determine the location of a transponder platform above-Earth or a fixed or mobile target on the ground or on water. The two-way ranging navigation measurements are used as calibration references, thereby improving the positioning accuracy of GPS. The system includes GPS and a two-way ranging navigation system for taking position measurements of a target. A correction factor is determined as a function of the measurements and the GPS position is adjusted by the correction factor. The method for calibrating GPS using two-way ranging navigation involves taking a two-way ranging navigation measurement and a GPS measurement of a target, determining a correction factor as a function of the measurements, and correcting the GPS position by taking a second GPS measurement and adjusting it by the correction factor.

摘要翻译： 一种使用双向测距导航准确地确定地球上的应答器平台或地面或水上固定或移动目标的位置的方法和系统。 双向测距导航测量用作校准参考，从而提高GPS的定位精度。 该系统包括GPS和用于对目标进行位置测量的双向测距导航系统。 作为测量的函数确定校正因子，并且通过校正因子来调整GPS位置。 使用双向测距导航来校准GPS的方法包括进行目标的双向测距导航测量和GPS测量，确定作为测量的函数的校正因子，以及通过进行第二GPS测量来校正GPS位置 并通过校正因子进行调整。

公开(公告)号：US06963548B1

公开(公告)日：2005-11-08

申请号：US09550505

申请日：2000-04-17

申请人： Donald C. D. Chang ,  Kar W. Yung ,  David C. Cheng ,  Frank A. Hagen ,  Ming U. Chang ,  John I. Novak, III

发明人： Donald C. D. Chang ,  Kar W. Yung ,  David C. Cheng ,  Frank A. Hagen ,  Ming U. Chang ,  John I. Novak, III

IPC分类号： H04B1/7097 ,  H04B7/185 ,  H04B7/26 ,  H04B1/707

CPC分类号： H04B7/18534 ,  H04B1/7097 ,  H04B2201/709709

摘要： A novel method and apparatus is described for reducing the number of CDMA codes for a constellation of multiple trasponder platforms serving a number of subscribers in the same service area. A coherent processing technique synchronizes the phase of CDMA signals arriving at a subscriber from multiple trasponder platforms to increase the code capacity and thus the number of possible subscribers for most of the multiple transponder platform systems in current use.

摘要翻译： 描述了一种新颖的方法和装置，用于减少为同一服务区域中的多个订户服务的多个应答器平台的星座的CDMA码的数量。 相干处理技术使来自多个应答器平台的到达用户的CDMA信号的相位同步，以增加当前使用中的多个应答器平台系统中的大多数应答器平台系统的代码容量和可能的订户数量。

公开(公告)号：US06501941B1

公开(公告)日：2002-12-31

申请号：US09432440

申请日：1999-11-02

申请人： Donald C. D. Chang ,  Kar W. Yung ,  David C. Cheng ,  Urban A. Von Der Embse ,  John I. Novak, III ,  Frank A. Taormina ,  Ming U. Chang

发明人： Donald C. D. Chang ,  Kar W. Yung ,  David C. Cheng ,  Urban A. Von Der Embse ,  John I. Novak, III ,  Frank A. Taormina ,  Ming U. Chang

IPC分类号： H04B7185

CPC分类号： H04B7/18519 ,  B64G1/1007 ,  B64G1/242

摘要： Methods for increasing the efficiency of satellite constellation operations are disclosed. The steps of the present invention comprise calculating the maximum number of communications signals that each satellite in the satellite constellation can generate, determining an operational constraint on each satellite, the operational constraint limiting the number of communications signals that each satellite can radiate substantially simultaneously, determining an operational space for each satellite wherein the operational space is defined using the operational constraint and the calculated number of signals, and using the operational space for each satellite in the constellation to determine the operational point for the constellation.

摘要翻译： 公开了提高卫星星座操作效率的方法。 本发明的步骤包括计算卫星星座中每个卫星可以产生的通信信号的最大数量，确定每个卫星的操作约束，限制每个卫星可基本上同时辐射的通信信号的数量的操作约束，确定 每个卫星的操作空间，其中使用操作约束和所计算的信号数定义操作空间，并且使用星座中的每个卫星的操作空间来确定星座的操作点。

公开(公告)号：US06337980B1

公开(公告)日：2002-01-08

申请号：US09271997

申请日：1999-03-18

申请人： Donald C. D. Chang ,  John I. Novak, III ,  Kar Yung ,  Frank A. Hagen ,  Ming U. Chang ,  William Mayfield

发明人： Donald C. D. Chang ,  John I. Novak, III ,  Kar Yung ,  Frank A. Hagen ,  Ming U. Chang ,  William Mayfield

IPC分类号： H04B7185

CPC分类号： H04B7/18504 ,  H04B7/18506 ,  H04B7/18532 ,  H04B7/18534 ,  H04B7/212

摘要： A novel mobile satellite communications technique for hand-held terminals includes a satellite system having a plurality of individual satellites all in communication with a ground telecommunications hub. A signal processed by the ground telecommunications hub is radiated through multiple paths to a plurality of the individual satellites in the satellite constellation simultaneously. The radiated signal is then re-radiated by the plurality of individual satellites to a mobile satellite terminal that receives the re-radiated signal from the plurality of individual satellites simultaneously such that the same frequency spectrum may be re-used by another mobile user.

摘要翻译： 一种用于手持终端的新型移动卫星通信技术包括具有全部与地面电信枢纽通信的多个单独卫星的卫星系统。 由地面电信枢纽处理的信号通过多个路径同时辐射到卫星星座中的多个单独的卫星。 然后，辐射信号被多个单独的卫星重新辐射到移动卫星终端，该移动卫星终端同时接收来自多个单独卫星的重新发射的信号，使得相同的频谱可被另一个移动用户重新使用。

公开(公告)号：US06295440B2

公开(公告)日：2001-09-25

申请号：US09726644

申请日：2000-11-30

申请人： Donald C. D. Chang ,  John I. Novak, III ,  Kar Yung ,  Frank A. Hagen ,  Ming U. Chang ,  William Mayfield

发明人： Donald C. D. Chang ,  John I. Novak, III ,  Kar Yung ,  Frank A. Hagen ,  Ming U. Chang ,  William Mayfield

IPC分类号： H04B7185

CPC分类号： H04B7/18504 ,  H04B7/18506 ,  H04B7/18532 ,  H04B7/18534 ,  H04B7/212

摘要： A novel mobile satellite communications technique for hand-held terminals includes a satellite system having a plurality of individual satellites all in communication with a ground telecommunications hub. A signal processed by the ground telecommunications hub is radiated through multiple paths to a plurality of the individual satellites in the satellite constellation simultaneously. The radiated signal is then re-radiated by the plurality of individual satellites to a mobile satellite terminal that receives the re-radiated signal from the plurality of individual satellites simultaneously such that the same frequency spectrum may be re-used by another mobile user.

公开(公告)号：US06762718B2

公开(公告)日：2004-07-13

申请号：US10289706

申请日：2002-11-07

申请人： Donald C. D. Chang ,  Kar Yung ,  Frank A. Hagen ,  Weizheng Wang

发明人： Donald C. D. Chang ,  Kar Yung ,  Frank A. Hagen ,  Weizheng Wang

IPC分类号： H01Q322

CPC分类号： H01Q3/26 ,  H01Q3/30 ,  H01Q25/00

摘要： A method for beamforming signals for an array of receiving or transmitting elements includes the steps of selecting a beam elevation and azimuth and grouping elements of an antenna array into element ensembles that are substantially aligned with a wavefront projection on the antenna array corresponding to the selected beam elevation and azimuth.

摘要翻译： 用于波束成形用于接收或发射元件阵列的信号的方法包括以下步骤：选择波束高度和方位角，并将天线阵列的元件分组为元件集合，其基本上对准天线阵列上对应于所选择的波束的波前投影 高程和方位角。

公开(公告)号：US06507314B2

公开(公告)日：2003-01-14

申请号：US10096765

申请日：2002-03-13

申请人： Donald C. D. Chang ,  Kar Yung ,  Frank A. Hagen ,  Weizheng Wang

发明人： Donald C. D. Chang ,  Kar Yung ,  Frank A. Hagen ,  Weizheng Wang

IPC分类号： H01Q322

CPC分类号： H01Q3/26 ,  H01Q3/30 ,  H01Q25/00

摘要： A method for beamforming signals for an array of receiving or transmitting elements includes the steps of selecting a beam elevation and azimuth and grouping elements of an antenna array into element ensembles that are substantially aligned with a wavefront projection on the antenna array corresponding to the selected beam elevation and azimuth.

公开(公告)号：US06380893B1

公开(公告)日：2002-04-30

申请号：US09655041

申请日：2000-09-05

申请人： Donald C. D. Chang ,  Kar Yung ,  Frank A. Hagen ,  Weizheng Wang

发明人： Donald C. D. Chang ,  Kar Yung ,  Frank A. Hagen ,  Weizheng Wang

IPC分类号： H01Q322

CPC分类号： H01Q3/26 ,  H01Q3/30 ,  H01Q25/00

摘要： A method for beamforming signals for an array of receiving or transmitting elements includes the steps of selecting a beam elevation and azimuth and grouping elements of an antenna array into element ensembles that are substantially aligned with a wavefront projection on the antenna array corresponding to the selected beam elevation and azimuth.

摘要翻译： 用于波束成形用于接收或发射元件阵列的信号的方法包括以下步骤：选择波束高度和方位角，并将天线阵列的元件分组为元件集合，其基本上对准天线阵列上对应于所选择的波束的波前投影 高程和方位角。

公开(公告)号：US09762309B2

公开(公告)日：2017-09-12

申请号：US14038813

申请日：2013-09-27

申请人： Donald C. D. Chang

发明人： Donald C. D. Chang

IPC分类号： H04B7/185 ,  H03F1/02 ,  H03F1/32 ,  H03F3/21 ,  H03F3/24 ,  H03F3/68 ,  H03F3/72

CPC分类号： H04B7/18515 ,  H03F1/0277 ,  H03F1/3247 ,  H03F1/3258 ,  H03F3/211 ,  H03F3/24 ,  H03F3/68 ,  H03F3/72 ,  H03F2201/3212 ,  H03F2203/21106 ,  H03F2203/21109 ,  H03F2203/21136 ,  H03F2203/21145 ,  H03F2203/21175 ,  H03F2203/7215 ,  H03F2203/7224 ,  H03F2203/7236

摘要： This invention aims to present a smart and dynamic power amplifier module that features both power combining and power sharing capabilities. The proposed flexible power amplifier (PA) module consists of a pre-processor, N PAs, and a post-processor. The pre-processor is an M-to-N wavefront (WF) multiplexer (muxer), while the post processor is a N-to-M WF de-multiplexer (demuxer), where N≧M≧2. Multiple independent signals can be concurrently amplified by a proposed multi-channel PA module with a fixed total power output, while individual signal channel outputs feature different power intensities with no signal couplings among the individual signals. In addition to basic configurations, some modules can be configured to feature both functions of parallel power amplifiers and also as M-to-M switches. Other programmable features include configurations of power combining and power redistribution functions with a prescribed amplitude and phase distributions, as well as high power PA with a linearizer.