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    • 1. 发明授权
    • Communication system using geographic position data
    • 通信系统使用地理位置数据
    • US06593880B2
    • 2003-07-15
    • US09188835
    • 1998-11-09
    • Scott R. VelazquezSteven R. BroadstoneAlice M. Chiang
    • Scott R. VelazquezSteven R. BroadstoneAlice M. Chiang
    • H04B700
    • H04W16/28G01S5/0027G01S5/12G01S19/06G01S19/51G01S19/53
    • A wireless communication system employs directive antenna arrays and knowledge of position of users to form narrow antenna beams to and from desired users and away from undesired users to reduce co-channel interference. By reducing co-channel interference coming from different directions, spatial filtering with antenna arrays improves the call capacity of the system. A space division multiple access (SDMA) system allocates a narrow antenna beam pattern to each user in the system so that each user has its own communication channel free from co-channel interference. The position of the users is determined using geo-location techniques. Geo-location can be derived via triangulation between cellular base stations or via a global positioning system (GPS) receiver. The system can be optimized by applying partially adaptive processing algorithms, which are seeded by geo-location data.
    • 无线通信系统使用指令性天线阵列和用户位置知识来形成到所需用户和来自期望用户的远离不期望的用户的窄天线波束,以减少同频道干扰。 通过减少来自不同方向的同信道干扰,利用天线阵列的空间滤波改善了系统的呼叫容量。 空分多址(SDMA)系统为系统中的每个用户分配窄天线波束模式,使得每个用户具有其自身的通信信道不受同频道干扰。 使用地理位置技术确定用户的位置。 地理位置可以通过蜂窝基站之间的三角测量或通过全球定位系统(GPS)接收机得出。 可以通过应用部分自适应处理算法来优化系统,这些算法由地理位置数据种子化。
    • 7. 发明授权
    • Sonar beamforming system
    • 声纳波束成形系统
    • US06842401B2
    • 2005-01-11
    • US09909141
    • 2001-07-19
    • Alice M. ChiangSteven R. Broadstone
    • Alice M. ChiangSteven R. Broadstone
    • G01S7/521G01S15/89G01S15/93G10K11/34H01Q3/26H01Q25/00H04B1/02
    • G10K11/346G01S7/521G01S15/8904G01S15/93G10K11/34H01Q3/26H01Q3/2682H01Q25/00
    • The present invention relates to sonar beamforming systems and methods, using a forward-looking sonar having transmit and receive transducer arrays with a beamforming device and at least one side-looking sonar having dynamically range-focused beams. The forward-looking sonar provides for obstacle avoidance and undersea survey. The systems include one-dimensional transmit and receive transducer arrays with beamforming electronics, a computing controller such as, for example, a personal computer host controller. The arrays and beamforming electronics can be packaged in a hermetically sealed housing unit and mounted in Unmanned Underwater Vehicles (UUV). The side-looking sonar system includes for example, 32-element, one-dimensional arrays that are mounted on either side of the UUVs. Further, a downward looking Bathymetric sonar may be mounted on the underside of the vehicle for high-resolution mapping.
    • 本发明涉及声纳波束成形系统和方法,其使用具有波束成形装置的发射和接收换能器阵列的前视声纳和具有动态范围聚焦波束的至少一个侧视声纳。 前瞻性声纳提供了避障和海底测量。 这些系统包括具有波束形成电子器件的一维发射和接收换能器阵列,诸如个人计算机主机控制器的计算控制器。 阵列和波束形成电子器件可以封装在密封的壳体单元中,并安装在无人水下车辆(UUV)中。 侧视声纳系统包括例如安装在UUV的任一侧上的32元素的一维阵列。 此外,可以在车辆的下侧安装向下看的测深声纳,用于高分辨率测绘。
    • 9. 发明授权
    • Portable ultrasound imaging system
    • 便携式超声成像系统
    • US5590658A
    • 1997-01-07
    • US496804
    • 1995-06-29
    • Alice M. ChiangSteven R. Broadstone
    • Alice M. ChiangSteven R. Broadstone
    • A61B7/04A61B8/00A61B8/12G01S7/00G01S7/52G01S15/89
    • A61B8/463A61B8/4236A61B8/546A61B8/56G01S15/8915G01S15/8934G01S15/8979G01S7/003G01S7/52053G01S7/52063G01S7/52073G01S7/5208A61B2560/045A61B7/04A61B8/00A61B8/12A61B8/4209A61B8/4455A61B8/4488G01S15/899G01S7/52023G01S7/52025G01S7/52026G01S7/52046
    • A portable ultrasound imaging system includes a handheld scan head coupled by a cable to a portable battery-powered data processor and display unit, preferably in the form of a lap-top computer. The scan head enclosure houses an array of ultrasonic transducers and the circuitry associated therewith, including pulse synchronizer circuitry used in the transmit mode to time transmission of ultrasonic pulses and beam forming circuitry used in the receive mode to dynamically focus reflected ultrasonic signals returning from the region of interest being imaged. Because the pulse synchronizer and beam forming circuits are integrated on small chips, they can be included in the scan head, resulting in a portable low-power system. Also, since the beam forming and summation functions are performed in the scan head in proximity to the transducer elements, signal loss is substantially reduced, resulting in much higher image quality. In addition, the focused summed signal is transferred to the data processor and display unit by a cable which is far less sophisticated and expensive than the cables used in prior systems to transfer all of the transducer signals to a console signal processing unit.
    • 便携式超声成像系统包括手持式扫描头,其通过电缆耦合到便携式电池供电的数据处理器和显示单元,优选地以膝上型计算机的形式。 扫描头外壳包含一组超声波换能器和与其相关联的电路,包括在发射模式中使用的脉冲同步器电路,用于在接收模式下使用超声波脉冲和波束形成电路的时间传输,以动态聚焦从该区域返回的反射超声波信号 感兴趣的被成像。 因为脉冲同步器和波束形成电路集成在小芯片上,所以它们可以被包括在扫描头中,从而产生便携式低功率系统。 此外,由于在扫描头中靠近换能器元件执行波束形成和求和功能,所以信号损耗显着降低,导致高得多的图像质量。 此外,聚焦的和信号通过电缆传送到数据处理器和显示单元,该电缆远远低于用于将所有传感器信号传送到控制台信号处理单元的现有系统中使用的电缆的复杂和昂贵。