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    • 33. 发明授权
    • Low cost system and method for making dual band GPS measurements
    • 低成本系统和双频GPS测量方法
    • US06762714B2
    • 2004-07-13
    • US10405702
    • 2003-04-03
    • Clark CohenDavid LawrenceStewart CobbPaul MontgomeryMiro SamekKurt ZimmermanMichael O'ConnorWalter MeltonGregory Gutt
    • Clark CohenDavid LawrenceStewart CobbPaul MontgomeryMiro SamekKurt ZimmermanMichael O'ConnorWalter MeltonGregory Gutt
    • G01S514
    • G01S19/29G01S19/32G01S19/37G01S19/44
    • A low-cost, solid-state position sensor system suitable for making precise code and carrier phase measurements in the L1 and L2 bands of GPS uses an ordinary, low-cost OEM card single-frequency carrier phase tracking C/A code receiver and includes low-cost hardware for sensing the L1 and L2 components of GPS carrier phase. Such measurements are suitable for general use in a variety of fields, including surveying. They are also of sufficient quality to be used in controlling heavy machinery, such as aircraft, farm tractors, and construction and mining equipment. A C/A code continuous tracking GPS receiver is used to produce GPS positioning fixes and real-time L1 carrier phase measurements. This C/A code receiver generates timing and reference information for a digital sampling component. This sampling component processes the L1 and L2 signals from the GPS signals in view. A digital signal processing component coupled to this sampling component processes the raw samples in synchronous, batch form including a step to precisely unwrap the P(Y) carrier phase to baseband. The receiver outputs synchronous, carrier phase measurements associated with each ranging source and signal observable. The synchronous raw carrier phase measurements from the continuous tracking C/A code receiver and the digital sampling component may be used to resolve the cycle ambiguities to each ranging source with respect to a reference station at a known location. Within a short interval typically tens of seconds from initial turn on, continuous, synchronous raw measurements are provided by the GPS receiver and processed into precise position fixes.
    • 一种低成本的固态位置传感器系统,适用于在GPS的L1和L2频带中进行精确的码和载波相位测量,使用普通的低成本OEM卡单频载波相位跟踪C / A码接收器,包括 低成本硬件,用于感测GPS载波相位的L1和L2分量。 这种测量适用于各种领域的一般用途,包括测量。 它们也具有足够的质量用于控制重型机械,如飞机,农用拖拉机,建筑和采矿设备。 使用C / A码连续跟踪GPS接收机来产生GPS定位固定和实时L1载波相位测量。 该C / A码接收器产生数字采样分量的定时和参考信息。 该采样组件从视觉上处理来自GPS信号的L1和L2信号。 耦合到该采样部件的数字信号处理部件以同步批次形式处理原始采样,包括将P(Y)载波相位精确地解包为基带的步骤。 接收机输出与每个测距源相关联的同步,载波相位测量和可观测信号。 可以使用来自连续跟踪C / A码接收机和数字采样部件的同步原始载波相位测量来相对于已知位置处的参考站来解析每个测距源的周期模糊度。 在初始打开的通常几十秒的短时间内,由GPS接收机提供连续的同步原始测量,并将其处理成精确的定位。
    • 35. 发明授权
    • Noise threshold estimating method for multichannel signal processing
    • 多通道信号处理噪声阈值估计方法
    • US4646254A
    • 1987-02-24
    • US892453
    • 1986-08-04
    • Michael O'ConnorRandall L. JacksonDavid P. Marple
    • Michael O'ConnorRandall L. JacksonDavid P. Marple
    • G01R23/15H04B15/00G06F15/20G06G7/19
    • G01R23/15
    • A noise threshold estimating method for use in a high signal density environment defines a noise threshold level for a plurality of frequency divided channels such that X number of said channels will be defined as being active channels and the remaining channels as being inactive. Using a novel closed loop feedback technique to define a noise threshold level, the noise threshold estimator first compares the signal level of each incoming channel with an analog threshold voltage. A logic device counts the number of active channels and then scales that number according to a predetermined scaling function. The scaled binary number is added with the noise threshold level from the previous clocked interval to define a new noise threshold level. This binary noise threshold level is converted into an analog voltage and feedback to the feedback input of the noise comparison devices to be compared with the signal level of each incoming channel.
    • 在高信号密度环境中使用的噪声阈值估计方法为多个分频信道定义噪声阈值电平,使得X个所述信道将被定义为活动信道,而剩余信道为非活动信道。 使用新颖的闭环反馈技术来定义噪声阈值电平,噪声阈值估计器首先将每个输入信道的信号电平与模拟阈值电压进行比较。 逻辑设备对活动通道的数量进行计数,然后根据预定的缩放功能对该数量进行缩放。 缩放的二进制数加上来自上一个时钟间隔的噪声阈值电平,以定义新的噪声阈值电平。 该二进制噪声阈值电平被转换为模拟电压并反馈到噪声比较装置的反馈输入端,以与每个输入信道的信号电平进行比较。
    • 36. 发明授权
    • Endovascular device with membrane
    • 带膜的血管内装置
    • US08715340B2
    • 2014-05-06
    • US11786023
    • 2007-04-09
    • Leon RudakovTsui Ying Rachel HongMichael O'Connor
    • Leon RudakovTsui Ying Rachel HongMichael O'Connor
    • A61F2/06
    • A61F2/07A61F2/915A61F2002/065
    • Embodiments of a uniformly porous membrane covering an endoprosthetic device, for example, a stent used to treat an aneurysm, are described. Some embodiments have a pore size and spacing that provides a material ratio of between 70-80% in the deployed state. Material ratio is the proportion of the total porous segment of the membrane that corresponds to membrane material, the remainder being pores. In some embodiments, pore size ranges from about 10-100 μm. In some embodiments, pores are equidistantly spaced with pore spacing in a range of about 40-100 μm. The combination of pore size and spacing are effective to provide a membrane that substantially prevents flow to the aneurysm, while maintaining flow to perforator vessels. In some embodiments the membrane includes permanently attached agents that promote attachment of endothelial cells or progenitors and healing of the aneurysm, or reduce immune responses detrimental to the healing process.
    • 描述了覆盖假体内装置的均匀多孔膜的实施例,例如用于治疗动脉瘤的支架。 一些实施例具有在展开状态下提供70-80%之间的材料比的孔径和间距。 材料比是对应于膜材料的膜的总多孔段的比例,其余是孔。 在一些实施方案中,孔径范围为约10-100μm。 在一些实施方案中,孔等距离地间隔开约40-100μm的孔隙。 孔径和间距的组合对于提供基本上防止流动到动脉瘤同时保持向穿孔器容器流动的膜是有效的。 在一些实施方案中,膜包括促进内皮细胞或祖细胞的附着和动脉瘤愈合的永久附着的试剂,或降低对愈合过程有害的免疫应答。