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- 1. 发明授权
  
  US06606307B1 Techniques for utilization of bandwidth space assets 有权
- 标题翻译：利用带宽空间资产的技术
- 公开(公告)号：US06606307B1
- 公开(公告)日：2003-08-12
- 申请号：US09432439
- 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： H04B7/18521
- 摘要： Methods for operating a satellite constellation are disclosed that utilize spatial diversity and directional gain antennas at ground terminal locations to provide multiple data rate services on a single frequency channel. One method comprises receiving a signal at a first and second satellite in the satellite constellation from a first communications device. A communications channel at a first frequency from the first satellite is used to communicate with the first communications device. A signal from a second communications device is received only at the second satellite at the first frequency, and the second satellite is used to communicate with the second communications device at the first frequency without substantially interfering with the communications with the first communications device.
- 摘要翻译：公开了用于操作卫星星座的方法，其利用地面终端位置处的空间分集和方向增益天线在单个频率信道上提供多个数据速率业务。一种方法包括从第一通信设备在卫星星座中的第一和第二卫星处接收信号。来自第一卫星的第一频率的通信信道被用于与第一通信设备进行通信。来自第二通信设备的信号仅在第一频率处在第二卫星处被接收，并且第二卫星被用于以第一频率与第二通信设备通信，而基本上不干扰与第一通信设备的通信。

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- 2. 发明授权
  
  US4627079A Method and apparatus for acquiring and tracking a communications signal 失效
- 标题翻译：用于获取和跟踪通信信号的方法和装置
- 公开(公告)号：US4627079A
- 公开(公告)日：1986-12-02
- 申请号：US549536
- 申请日：1983-11-07
- 申请人： Urban A. von der Embse
- 发明人： Urban A. von der Embse
- IPC分类号： H04L25/49 , H04L27/227 , H04B1/16 , H04L27/00
- CPC分类号： H04L25/4904 , H04L27/2272
- 摘要： A receiver is disclosed for acquiring and tracking a data signal in a highly stressed environment. The receiver comprises first and second I.F. sections, a mixer for translation from the first I.F. frequency to the second I.F. frequency, a 2 KHz bandpass filter at the second I.F. frequency, signal translator for synchronous translation of the signal at the second I.F. frequency to baseband, a digitizer for complex sampling operation on the baseband signal, a microprocessor for processing the digital samples, and a numerically controlled oscillator coupled to the mixer and controlled by the microprocessor. The microprocessor formulates matched digital discrete Fourier Transform filters which drive frequency, phase and symbol lock loops at the symbol rate. Each of the loop filters is formed by symbol-rate recursive, first-order equations. A novel mode control system is employed to implement an orderly transition through the receiver modes, comprising (i) out-of-band noise estimation, (ii) coarse frequency and time acquisition of the data signal employing a sequential probability ratio test and a handover process, (iii) frequency and symbol synchronization with the data signal, (iv) phase and symbol synchronization with the data signal, and (v) feedback loop lock confirmation. After loss of lock, the mode controller transfers the receiver operations back to the appropriate restart operation.
- 摘要翻译：公开了用于在高度应力环境中获取和跟踪数据信号的接收器。接收机包括第一和第二I.F. 部分，从第一个I.F.翻译的搅拌机频率到第二个I.F. 频率为2KHz带通滤波器。频率信号转换器，用于在第二个IF处的信号同步转换。频率到基带，用于对基带信号进行复杂采样操作的数字转换器，用于处理数字样本的微处理器，以及耦合到混频器并由微处理器控制的数控振荡器。微处理器制定匹配的数字离散傅里叶变换滤波器，以符号速率驱动频率，相位和符号锁定环路。每个环路滤波器由符号速率递归的一阶方程组成。采用新颖的模式控制系统来实现通过接收机模式的有序转换，包括（i）带外噪声估计，（ii）使用连续概率比测试和切换的数据信号的粗略频率和时间获取过程，（iii）与数据信号的频率和符号同步，（iv）与数据信号的相位和符号同步，以及（v）反馈回路锁定确认。锁定失败后，模式控制器将接收机操作重新传送回适当的重启操作。

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- 3. 发明授权
  
  US06807397B2 Method for identifying growth limits of handheld services for mobile satellite communications 有权
- 标题翻译：识别移动卫星通信手持服务增长限制的方法
- 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。

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- 4. 发明授权
  
  US07236508B2 Application of complex codes to maximize feeder link utilization 有权
- 标题翻译：应用复杂代码最大化馈线链路利用率
- 公开(公告)号：US07236508B2
- 公开(公告)日：2007-06-26
- 申请号：US09967691
- 申请日：2001-09-28
- 申请人： Ying J. Feria , Donald C. D. Chang , Ming U. Chang , Urban A. Von Der Embse
- 发明人： Ying J. Feria , Donald C. D. Chang , Ming U. Chang , Urban A. Von Der Embse
- IPC分类号： H04B1/00
- CPC分类号： H04B1/707 , H04B7/0613 , H04B2201/70715
- 摘要： A method of increasing utilization of user link bandwidth for a code division multiple access communications system is disclosed that includes the steps of selecting a set of orthogonal complex codes each having a code length that is greater than a code length of an optimum real code and less than or equal to a number of antenna elements in an antenna array of the feeder link.
- 摘要翻译：公开了一种增加用于码分多址通信系统的用户链路带宽利用率的方法，该方法包括以下步骤：选择一组正交复数码，每一组码的码长大于最佳实码的码长，大于或等于馈线链路的天线阵列中的多个天线元件。

基本信息 PDF全文 PDF下载全文下载相似专利权利要求书说明书全文 Espacenet 法律信息同族专利专利引用

- 5. 发明授权
  
  US07068733B2 Sampling technique for digital beam former 失效
- 标题翻译：数字波束形成器采样技术
- 公开(公告)号：US07068733B2
- 公开(公告)日：2006-06-27
- 申请号：US09973270
- 申请日：2001-10-05
- 申请人： Donald C. D. Chang , Kar W. Yung , Urban A. Von der Embse
- 发明人： Donald C. D. Chang , Kar W. Yung , Urban A. Von der Embse
- IPC分类号： H04L9/00 , H04B7/185 , H01Q3/26 , H04N11/02
- CPC分类号： H04B7/18515 , H04B7/2041 , H04L1/02
- 摘要： A mobile satellite payload 18 and a method for sampling communication signals 26 are provided. The mobile satellite payload 18 uses a plurality of receive radiating elements 24 within a phase array antenna 22 to convert the communication signals 26 to received signals [S(t)]. A plurality of low noise amplifiers (LNAs) 28 amplify the received signals [S(t)] to then be received by a plurality of analog-to-digital (A/D) converters 29. The A/D converters 29 transform the received signals [S(t)] into digital baseband signals [S″(t)].
- 摘要翻译：提供了一种移动卫星有效载荷18和一种用于采样通信信号26的方法。移动卫星有效载荷18使用相位阵列天线22内的多个接收辐射元件24将通信信号26转换成接收信号[S（t）]。多个低噪声放大器（LNA）28放大接收到的信号[S（t）]，然后由多个模数（A / D）转换器29接收。 A / D转换器29将接收信号[S（t）]变换为数字基带信号[
  
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