公开(公告)号：US20120063550A1

公开(公告)日：2012-03-15

申请号：US12951995

申请日：2010-11-22

申请人： Donald C. D. Chang ,  Yulan Sun ,  Frank Lu

发明人： Donald C. D. Chang ,  Yulan Sun ,  Frank Lu

IPC分类号： H04L27/06 ,  H04B1/10

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 receiver with orthogonal beam forming technique is achieved that is capable of differentiating different signal components within the received composite signal. An adaptive processor is used to eliminate the signal component whose phase information is known or can be calculated. The phase information of the major component of a signal can be easily acquired by using a limiter. The phase information of other signal components can be acquired by their direction information and other characteristics, such as modulation scheme, etc. Multiple orthogonal beams can be formed by eliminating one unwanted signal component each time by the adaptive processor until all unwanted signal is eliminated. Thus, a composite signal from multiple sources can be broken down into their component signals.

摘要翻译： 实现了具有正交波束形成技术的接收机，其能够区分接收到的复合信号中的不同信号分量。 使用自适应处理器来消除其相位信息已知或可被计算的信号分量。 可以通过使用限制器容易地获取信号的主要成分的相位信息。 其他信号分量的相位信息可以通过它们的方向信息和诸如调制方案等的其它特性来获取。可以通过自适应处理器每次消除一个不需要的信号分量来形成多个正交波束，直到消除所有不需要的信号。 因此，来自多个源的复合信号可以被分解成它们的分量信号。

公开(公告)号：US20120062420A1

公开(公告)日：2012-03-15

申请号：US13029015

申请日：2011-02-16

申请人： Donald C. D. Chang

发明人： Donald C. D. Chang

IPC分类号： H01Q3/00

CPC分类号： H01Q3/2605 ,  H01Q19/12 ,  H01Q21/29

摘要： This device combines multiple elements that function like a single smart antenna that performs both connectivity and spatial discrimination functions. The antenna functions in both receive and transmit modes. The apparatus utilizes commonly used components to distinguish and separate desired satellite signals from those signals of satellites in close directional proximity. Disclosed are six methods for optimizing simultaneously reception of multiple desired satellite signals performed either mechanically or electronically and also included is an optimization technique. The transmission apparatus uses many of the same components as the receiver antenna and additionally uses in-beam nulling to fine tune transmission.

摘要翻译： 该设备组合了多个功能类似单个智能天线的元件，可实现连接和空间辨别功能。 天线在接收和发送模式下都有作用。 该装置利用常用的组件来区分和分离所期望的卫星信号与卫星的接近方向接近的那些信号。 公开了用于优化机械地或电子地执行的多个所需卫星信号的同时接收的六种方法，并且还包括优化技术。 发送装置使用与接收机天线相同的许多部件，并且还使用波束内零位来微调传输。

公开(公告)号：US07720472B1

公开(公告)日：2010-05-18

申请号：US09661967

申请日：2000-09-14

申请人： Ying Feria ,  Ming Chang ,  Donald C. D. Chang

发明人： Ying Feria ,  Ming Chang ,  Donald C. D. Chang

IPC分类号： H04W4/00

CPC分类号： H04B7/18504

摘要： A system has a stratospheric platform with a payload controller and a phased array antenna having a plurality of elements. A gateway station communicates with the stratospheric platform. The gateway station scales the plurality of elements to form a reconfigurable plurality of beams. The gateway station communicates a control signal to the stratospheric platform to communicate a scaling of the elements. The stratospheric platform configures the elements of the phased array antenna according to the scaling using adaptive interference rejections.

摘要翻译： 系统具有带有有效载荷控制器的平流层平台和具有多个元件的相控阵天线。 网关站与平流层平台通信。 网关站缩放多个元素以形成可重构的多个波束。 网关站将控制信号传送到平流层平台以传送元素的缩放。 平流层平台根据使用自适应干扰抑制的缩放来配置相控阵天线的元件。

公开(公告)号：US07257418B1

公开(公告)日：2007-08-14

申请号：US09652862

申请日：2000-08-31

申请人： Donald C. D. Chang ,  Alan Cha ,  Ying Feria

发明人： Donald C. D. Chang ,  Alan Cha ,  Ying Feria

IPC分类号： H04Q7/20

CPC分类号： H04B7/18545 ,  H04B7/18504 ,  H04W84/06

摘要： A method for rapid acquisition of a specific subscriber by a ground-based beamformer includes the steps of defining a coverage area as an arrangement of a plurality of cells wherein one of the plurality of cells includes a specific subscriber; defining a partition of cell clusters wherein one of the cell clusters includes the one of the plurality of cells that includes the specific subscriber; forming a beam that corresponds to an area of one of the cell clusters; and scanning the beam to the cell cluster that includes the specific subscriber.

摘要翻译： 一种用于通过地面波束形成器快速获取特定用户的方法包括以下步骤：将覆盖区域定义为多个小区的布置，其中多个小区中的一个小区包括特定订户; 定义小区簇的分区，其中小区簇中的一个包括包括特定用户的多个小区中的一个小区; 形成对应于一个所述细胞簇的区域的束; 并将光束扫描到包括特定订户的小区集群。

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。