公开(公告)号：US07103317B2

公开(公告)日：2006-09-05

申请号：US09967757

申请日：2001-09-28

申请人： Donald C. D. Chang ,  Wah L. Lim ,  Ming U. Chang

发明人： Donald C. D. Chang ,  Wah L. Lim ,  Ming U. Chang

IPC分类号： H04Q7/20

CPC分类号： H04B7/18508 ,  H01Q1/007 ,  H01Q3/26 ,  H04B7/0408 ,  H04B7/18506 ,  H04W84/06

摘要： A communication system has a communication infrastructure and a gateway station communicating a communication signal to the communication infrastructure. An airplane having an antenna coupled to a processing circuit for establishing a plurality of multiple communication links corresponding to the communication infrastructure is used. The gateway station generates multiple datagrams from the television signal and transmits the multiple datagrams through the multiple dynamic links. The antenna receives the datagrams from the infrastructure and the processing circuit and reassembles the datagrams into the communication signal.

公开(公告)号：US06763242B1

公开(公告)日：2004-07-13

申请号：US09661726

申请日：2000-09-14

申请人： Ying Feria ,  Ming Chang ,  Donald C. D. Chang ,  Frank A. Hagen ,  Alan Cha

发明人： Ying Feria ,  Ming Chang ,  Donald C. D. Chang ,  Frank A. Hagen ,  Alan Cha

IPC分类号： H04B700

CPC分类号： H04B7/18506

摘要： A communications system and method of operating the communications system includes a high altitude communication device that communicates with a plurality of user terminals and a gateway station. The gateway station couples the users to terrestrial networks and other users. The high altitude communication device has gateway station that assigns a first code to a beam of a first plurality of users. The gateway station continually determines whether an interference occurs between the first beam and the second beam by determining whether the first interference contour intersects the second interference contour when the first interference contour intersects the second interference contour. The gateway station declares an interference when the contours intersect and reassigns a second resource to the first beam.

摘要翻译： 通信系统和操作通信系统的方法包括与多个用户终端和网关站通信的高空通信设备。 网关站将用户耦合到地面网络和其他用户。 高空通信设备具有将第一代码分配给第一多个用户的波束的网关站。 当第一干涉轮廓与第二干涉轮廓相交时，通过确定第一干涉轮廓是否与第二干涉轮廓相交，连续地确定在第一光束和第二光束之间是否发生干涉。 当轮廓相交并将第二个资源重新分配给第一个波束时，网关站会声明干扰。

公开(公告)号：US5016018A

公开(公告)日：1991-05-14

申请号：US326935

申请日：1989-03-22

申请人： Donald C. D. Chang ,  Edwin A. Kelley

发明人： Donald C. D. Chang ,  Edwin A. Kelley

IPC分类号： G01R29/08 ,  G01N22/00 ,  G01N22/04 ,  G01S13/90 ,  H01Q3/26 ,  H01Q25/00

CPC分类号： H01Q3/2605 ,  G01N22/00 ,  G01S13/9023 ,  H01Q25/004

摘要： A digital aperture synthesized radiometer for synthesizing the imaging an image scene. A plurality of antenna arrays receive radiation emitted or reflected from an scene, and an analog to digital coverter converts received radiation into digitized signals. A digital beamformer synthesizes the digitized signals to provide an image corresponding to the scene. The digital beamformer comprises individual digital beamformers which generate a set of fanbeam signals for each array. The beamformers provide for cross track imaging of the scene. A digital interferometer correlates corresponding pairs of fanbeam signals from the two sets of fanbeam signals to produce a chirp signal for each pair. A matched filter processes the chirp signals to transform each chirp signal into a corresponding image point of the scene. This provides for along track imaging of the scene. The beamformers include an amplitude weighting and data turning circuit to reduce fanbeam signal sidelobe levels and eliminate alternate mainlobes from the digitized radiation signals to reduce mainlobe widening. A fast Fourier transform circuit in the beamformers generally comprises a decimation-in-time algorithm implemented by means of a plurality of parallel and cascaded butterfly computation circuits. Image processing methods for achieving digital radiometry are also disclosed.

公开(公告)号：US09995828B2

公开(公告)日：2018-06-12

申请号：US13008833

申请日：2011-01-18

申请人： Donald C. D. Chang ,  Steve Chen

发明人： Donald C. D. Chang ,  Steve Chen

IPC分类号： G10K11/16 ,  G01S19/21 ,  G10K11/34 ,  G10K11/178

CPC分类号： G01S19/215 ,  G10K11/178 ,  G10K11/34 ,  G10K11/341 ,  G10K2210/12 ,  G10K2210/128 ,  G10K2210/3215

摘要： A quiet zone generation technique for acoustic/audio signals is proposed for mitigation of selected noise or interferences over limited areas in free space by injecting the very acoustic noise, interference, or audio feedback signals via iterative processing, generating quiet zones dynamically. This creates undesired noise-free quiet zones. Optimization loops operating iteratively to electronically process cancellation signals consist of three interconnected functional blocks: (1) an acoustic injection array, consisting of pick-up arrays to obtain the interference signals, beam forming networks for element weighting and/or re-positioning, and array elements for noise injections, (2) a diagnostic network with strategically located probes, and (3) an optimization processor with cost minimization algorithms to calculate element weights for updating.

公开(公告)号：US09848094B2

公开(公告)日：2017-12-19

申请号：US14935319

申请日：2015-11-06

申请人： Donald C. D. Chang ,  Juo-Yu Lee ,  Steve K. Chen

发明人： Donald C. D. Chang ,  Juo-Yu Lee ,  Steve K. Chen

IPC分类号： H04N1/00 ,  H04L29/08 ,  G06F3/12

CPC分类号： H04N1/00307 ,  G06F3/1222 ,  G06F3/1248 ,  G06F3/1292 ,  H04L67/10 ,  H04N1/00108

摘要： Presented are cloud storage architectures for private data of scanned documents uploaded from smart phone among terminals with enhanced capability of data privacy and survivability. Pre-processing for storing data in IP cloud comprises: transforming multiple first data sets into multiple second data sets at an uploading site, wherein one of said second data sets comprises a weighted sum of said first data sets; storing said second data sets in an IP cloud via IP connectivity; and storing data in multiple data storages linking to said second data sets at said uploading site. In accordance with an embodiment of present invention post processing may comprise recovering said second data sets at a downloading site via IP network.

公开(公告)号：US09356358B2

公开(公告)日：2016-05-31

申请号：US12851011

申请日：2010-08-05

申请人： Donald C. D. Chang ,  Michael T. S. Lin ,  Eric Hu

发明人： Donald C. D. Chang ,  Michael T. S. Lin ,  Eric Hu

IPC分类号： H01Q1/08 ,  H01Q19/10 ,  H01Q3/04 ,  H01Q3/06 ,  H01Q19/13

CPC分类号： H01Q3/06 ,  H01Q3/04 ,  H01Q3/40 ,  H01Q19/10 ,  H01Q19/12 ,  H01Q19/132

摘要： An antenna system comprises: multiple antenna elements; and multiple beam forming networks configured to produce radiation patterns for both receiving and transmission functions configured to be optimized by re-positioning said antenna elements, wherein said beam forming networks comprise a receiving beam forming network configured to combine multiple first inputs from said antenna elements into at least a first output, and a transmission beam forming network configured to divide a second input into multiple second outputs to said antenna elements.

摘要翻译： 天线系统包括：多个天线元件; 以及多个波束形成网络，其被配置为产生用于接收和传输功能的辐射图，所述辐射图形被配置为通过重新定位所述天线元件来优化，其中所述波束形成网络包括接收波束形成网络，其被配置为将来自所述天线元件的多个第一输入 至少第一输出和被配置为将第二输入分成多个第二输出到所述天线元件的发射波束形成网络。

公开(公告)号：US09077427B2

公开(公告)日：2015-07-07

申请号：US13367031

申请日：2012-02-06

申请人： Donald C. D. Chang

发明人： Donald C. D. Chang

IPC分类号： H04B7/185 ,  H03H7/30 ,  H04L27/00 ,  H04B7/04 ,  H04B7/204 ,  H04L25/03

CPC分类号： H04B7/18515 ,  H04B7/0413 ,  H04B7/18517 ,  H04B7/18523 ,  H04B7/2041 ,  H04J14/00 ,  H04J14/005 ,  H04J14/08 ,  H04L25/03006

摘要： A communication system and method for a deep space spacecraft receiver to perform post-processing to dynamically combine received signal power coherently for pre-processed signal streams radiated non-coherently from a distributed, multiple element, Ka-band transmitting array via multiple concurrent propagation paths. Mutually orthogonal data and pilot signals travel though the multiple propagation paths. A pre-processor utilizing wavefront multiplexing restructures signal streams on the ground into multi-channel wavefrom structures along with injections of pilot signals for diagnostic and probing purposes. These restructured, or “wavefront multiplexed” (WFM) signals are transmitted through propagation channels to a receiver on the spacecraft, wherein adaptive equalization and wavefront de-multiplexing coherently separates the mixtures of received WFM signals. Transmitting power can be dynamically allocated for the multiple concurrent data streams, radiated to different spacecraft within the same field of view according to continuously changing demand by changing the relative input power ratios of the WFM signal mixtures.

摘要翻译： 一种用于深空飞行器接收机的通信系统和方法，用于执行后处理以将接收信号功率相干地动态地组合用于经由多个并发传播路径从分布式多元素Ka波段发射阵列非相干辐射辐射的预处理信号流 。 互相正交的数据和导频信号通过多个传播路径。 利用波前复用的预处理器将地面上的信号流重新组合成多通道波形结构以及用于诊断和探测目的的导频信号的注入。 这些重组的或“波前多路复用”（WFM）信号通过传播信道传输到航天器上的接收机，其中自适应均衡和波前解复用相干地分离接收到的WFM信号的混合。 根据不断变化的需求，通过改变WFM信号混合的相对输入功率比，可以动态分配多个并发数据流的发射功率，在同一视野内辐射到不同的航天器。

公开(公告)号：US08395546B2

公开(公告)日：2013-03-12

申请号：US13024244

申请日：2011-02-09

申请人： Donald C. D. Chang

发明人： Donald C. D. Chang

IPC分类号： H01Q3/00

CPC分类号： H04B7/086 ,  H01Q3/24 ,  H01Q3/2605 ,  H01Q3/2647 ,  H01Q3/46 ,  H04B7/0615

摘要： A receive only smart antenna with a command pointing option for communicating with geostationary satellites that autonomously detects the directions from which desired signal are received, and steer the multiple beams accordingly. An array feed is used to illuminate a parabolic reflector. Each feed element of the receive only smart antenna is associated with a unique beam pointing direction. As a receiver is switched to different feed elements, the far-field beam is scanned, making it possible to track a geostationary satellite in a slightly inclined orbit. This eliminates the need for mechanical tracking and maintains high antenna gain in the direction of the geostationary satellite. The receive only smart antenna also features capabilities to form multiple simultaneous beams supporting operations of multiple geo-satellites in closely spaced slightly inclined orbits. The designs can support orthogonal beams for enhanced bandwidth capacity via multiple beams with excellent spatial isolation.

摘要翻译： 具有用于与对地静止卫星进行通信的命令指示选项的仅接收智能天线，其自主地检测所接收的所需信号的方向，并相应地引导多个波束。 阵列馈线用于照亮抛物面反射器。 仅接收智能天线的每个馈送元件与唯一的波束指向方向相关联。 随着接收机被切换到不同的馈送元件，远场光束被扫描，使得可以以稍微倾斜的轨道跟踪对地静止卫星。 这消除了机械跟踪的需要，并在对地静止卫星的方向上保持高天线增益。 仅接收智能天线还具有形成多个同时波束的能力，其支持在紧密间隔的稍微倾斜的轨道中的多个地球卫星的操作。 这些设计可以通过具有优异空间隔离的多个波束支持正交波束，以提高带宽容量。

公开(公告)号：US08384572B2

公开(公告)日：2013-02-26

申请号：US12985044

申请日：2011-01-05

申请人： Tzer-Hso Lin ,  Yuanchang Liu ,  Donald C. D. Chang

发明人： Tzer-Hso Lin ,  Yuanchang Liu ,  Donald C. D. Chang

IPC分类号： H03M1/20

CPC分类号： H03M1/002 ,  H03M1/0641 ,  H03M1/08 ,  H03M1/12 ,  H03M1/1205 ,  H03M1/1215 ,  H03M1/188 ,  H03M1/20 ,  H04B1/0475 ,  H04B1/123 ,  H04B7/10 ,  H04L27/06

摘要： A novel noise injection technique is presented to improve dynamic range with low resolution and low speed analog to digital converters. This technique combines incoming signal and noise signal with wave front de-multiplexer and split into several channels. Then low resolution and low speed analog to digital converters are used to sample each channels. All signals are recovered using wave front multiplexer. For advanced design, ground diagnostic signals with optimizing processor can be added to guarantee recovery quality.

摘要翻译： 提出了一种新颖的噪声注入技术，通过低分辨率和低速模数转换器来改善动态范围。 该技术将输入信号和噪声信号与波前解复用器相结合，并分为多个通道。 然后使用低分辨率和低速模数转换器对每个通道进行采样。 所有信号使用波前复用器进行恢复。 对于先进的设计，可以添加具有优化处理器的接地诊断信号，以保证恢复质量。

公开(公告)号：US20120069918A1

公开(公告)日：2012-03-22

申请号：US13236418

申请日：2011-09-19

申请人： Donald C. D. Chang

发明人： Donald C. D. Chang

IPC分类号： H04L27/06 ,  H04L27/00

CPC分类号： H01Q1/243 ,  H01Q1/242 ,  H01Q3/24 ,  H01Q3/2605 ,  H01Q21/00 ,  H01Q21/20 ,  H04B7/086

摘要： The present invention features novel methods of implementing configurable arrays for personal portable devices including hand-held mobile devices and re-locatable wireless devices, utilizing a wireless communications system that employs multiple individual hubs and/or base-stations. The digital beam forming (DBF) methodology utilizes multiple low gain elements conformal to the mechanical contours of handheld devices to function as arrays. The distributed N element arrays dynamically provide the options of reconfigurable shaped beams with near hemispheric radiation patterns for various handheld orientations and conditions by various users, while also supporting operations of multiple orthogonal beams concurrently connecting to multiple hubs. The larger the N becomes, the more flexibility the residing devices can provide.

摘要翻译： 本发明的特征在于，利用使用多个单独的集线器和/或基站的无线通信系统来实现用于个人便携式设备的可配置阵列的新颖方法，包括手持移动设备和可重新定位的无线设备。 数字波束形成（DBF）方法利用符合手持设备的机械轮廓的多个低增益元件作为阵列。 分布式N元素阵列动态地提供具有近半球辐射图的可重构形状波束的选项，用于各种用户的各种手持方向和条件，同时还支持同时连接到多个中心的多个正交波束的操作。 N越大，驻留设备可以提供的灵活性就越大。