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    • 3. 发明授权
    • Sonar rendering systems and associated methods
    • 声纳渲染系统及相关方法
    • US09182486B2
    • 2015-11-10
    • US13313574
    • 2011-12-07
    • Kevin BrownAaron Coleman
    • Kevin BrownAaron Coleman
    • G01S15/00G01S15/89G01S7/62G01S15/02G01S15/50
    • G01S15/8902G01S7/6281G01S7/629G01S15/025G01S15/50
    • Sonar rendering systems and methods are described herein. One example is an apparatus that includes a transducer element, position sensing circuitry, processing circuitry, and a display device. The processing circuitry may be configured to receive raw sonar data and positioning data, convert the raw sonar data into range cell data based at least on amplitudes of the return echoes, make a location-based association between the raw sonar data and the positioning data, plot the range cell data based on respective positions derived from the positioning data and rotate the range cell data based on a direction of movement of the watercraft to generate adjusted range cell data. The processing circuitry may be further configured to convert the adjusted range cell data into sonar image data, and cause the display device to render the sonar image data with a presentation of a geographic map.
    • 本文描述了声纳渲染系统和方法。 一个示例是包括换能器元件,位置感测电路,处理电路和显示装置的装置。 处理电路可以被配置为接收原始声纳数据和定位数据,至少基于返回回波的幅度将原始声纳数据转换成范围单元数据,在原始声纳数据和定位数据之间进行基于位置的关联, 基于从定位数据导出的相应位置绘制范围单元数据,并且基于船舶的运动方向旋转范围单元数据以生成调整范围单元数据。 处理电路还可以被配置为将调整的范围单元数据转换成声纳图像数据,并且使得显示设备用地图的呈现来呈现声纳图像数据。
    • 7. 发明授权
    • Gain control in a communication channel
    • 在通信通道中增益控制
    • US08446994B2
    • 2013-05-21
    • US12634233
    • 2009-12-09
    • Gregory S. RawlinsKevin BrownMichael W. RawlinsDavid F. Sorrells
    • Gregory S. RawlinsKevin BrownMichael W. RawlinsDavid F. Sorrells
    • H04L27/08
    • H03G3/20H04B1/30
    • Methods and apparatuses for reducing DC offsets in a communication system are described. In a first aspect, a feedback loop circuit reduces DC offset in a wireless local area network (WLAN) receiver channel. The frequency response of the feedback loop circuit can be variable. In a second aspect, a circuit provides gain control in a WLAN receiver channel. The stored DC offset is subtracted from the receiver channel. First and second automatic gain control (AGC) amplifiers are coupled in respective portions of the receiver channel. In a third aspect, a feedback loop circuit reduces DC offset in a WLAN receiver channel. The feedback loop circuit includes a storage element that samples and stores receiver channel DC offset. The loop is opened, and the DC offset stored in the storage element is subtracted from the receiver channel. Circuits for monitoring DC offset, and for providing control signals for controlling the frequency response of the DC offset reducing circuits are also provided.
    • 描述用于减少通信系统中的DC偏移的方法和装置。 在第一方面,反馈回路电路减少无线局域网(WLAN)接收机信道中的DC偏移。 反馈回路电路的频率响应是可变的。 在第二方面,电路在WLAN接收机信道中提供增益控制。 从接收机通道中减去存储的直流偏移。 第一和第二自动增益控制(AGC)放大器耦合在接收机通道的相应部分中。 在第三方面,反馈回路电路减少WLAN接收机信道中的DC偏移。 反馈回路电路包括采样和存储接收机通道DC偏移的存储元件。 打开该循环,并从接收器通道中减去存储在存储元件中的DC偏移。 还提供了用于监控DC偏移的电路,以及用于提供用于控制DC偏移减小电路的频率响应的控制信号。
    • 8. 发明授权
    • Internet protocol telephone system
    • US08401175B2
    • 2013-03-19
    • US12461354
    • 2009-08-10
    • Siavash FallahiKevin Brown
    • Siavash FallahiKevin Brown
    • H04M1/00H04M9/00
    • H04M1/2535H03H7/06H03H7/075H03H7/38H04M11/066
    • An internet protocol telephone includes a substrate having an input and an output that are capable of being connected to the internet protocol (IP) network. A relay is disposed on the substrate and is connected between the input and the output of the substrate. The relay includes first and second native FETs that have a threshold voltage of approximately zero volts. Therefore, the relay is nominally turned-on, even when little or no voltage (or power) is applied to the IP telephone substrate, as during the discovery mode of IP telephone operation. During discovery mode, The IP phone is configured to be responsive to extended link pulses and block data packets that are associated with legacy devices. Data packets have a higher signal duration and are more continuous than extended link pulses. The IP phone includes a switchable ground that is connected to the gates of the native devices, and is controlled by a rectifier and filter circuit that are connected to the substrate input. If the IP phone receives legacy data packets during discovery mode, then the high signal duration and continuous nature of the data packets are sufficient to cause the rectifier to generate a rectified signal having sufficient amplitude to activate the switchable ground, so as to ground the gates of the native devices and therefore turn-off the native devices. Therefore, the data packets are rejected and are not passed back to the switch. Extended link pulses have a frequency that is too low to generate a rectified signal that is sufficient to activate the switchable ground, and therefore the native devices remain turned-on. Accordingly, the extended link pulses are passed back to the switch.
    • 9. 发明申请
    • Method and System for Asymmetric Operation in a Network Node in an Energy Efficient Network
    • 节能网络网络节点不对称操作方法与系统
    • US20120224582A1
    • 2012-09-06
    • US13471763
    • 2012-05-15
    • Wael William DiabKevin Brown
    • Wael William DiabKevin Brown
    • H04L12/56
    • H04L12/40136H04L43/0823H04L43/0894Y02D50/10
    • An Ethernet network comprising multi-rate link partners that may be operable to communicate symmetrically and/or asymmetrically via any of a plurality of channels. The multi-rate link partners may monitor one or more factors that may affect their power consumption and/or energy efficiency. During operation, an uplink and/or downlink communication rate may be configured, based on the monitoring, to enable asymmetrical data rate operation. The monitored factors may comprise prior or current data rates, bit error rate, packet error rate, latency, queued data and/or tasks, for example. The multi-rate link partners may comprise a twisted pair PHY, an optical PHY or a backplane PHY. In order to reduce power consumption and/or improve energy efficiency, one or more of the uplink communication rate and/or the downlink communication rate may be lowered. The power consumption may be reduced for a multi-rate PHY, a host computer and/or a MAC controller.
    • 一种包括多速率链路伙伴的以太网,其可操作以经由多个信道中的任一个对称和/或不对称地通信。 多速率链路伙伴可以监视可能影响其功率消耗和/或能量效率的一个或多个因素。 在操作期间,可以基于监视来配置上行链路和/或下行链路通信速率,以实现非对称数据速率操作。 受监视的因素可以包括例如先前的或当前的数据速率,误码率,分组错误率,等待时间,排队的数据和/或任务。 多速率链路伙伴可以包括双绞线PHY,光学PHY或背板PHY。 为了降低功率消耗和/或提高能量效率,可以降低上行链路通信速率和/或下行链路通信速率中的一个或多个。 对于多速率PHY,主机和/或MAC控制器,功耗可能会降低。
    • 10. 发明授权
    • Radiotherapy apparatus
    • 放射治疗仪
    • US08139718B2
    • 2012-03-20
    • US12740291
    • 2007-10-30
    • Kevin BrownRalph StreamerDuncan Bourne
    • Kevin BrownRalph StreamerDuncan Bourne
    • G21K1/04A61N5/10
    • A61N5/1049A61N5/1042A61N5/1067A61N2005/1061
    • Realtime beam shape adjustment in response to (for example) online CT scanning of a patient during treatment is assisted by the radiotherapy apparatus comprising a source adapted to emit a beam of therapeutic radiation, a collimator for delimiting the radiation beam, the collimator comprising a plurality of leaves arranged alongside each other and be moveable longitudinally so that the tips of the leaves define a variable edge of the collimator, the leaves being mounted on a support that is moveable laterally with respect to the leaves. In this way, movements of the tumor that are perpendicular to the direction of leaf motion can be accommodated by simply moving the collimator bodily so as to accommodate this. It is preferred that the apparatus also includes a control means adapted to receive information as to the location of the target volume, and, on the basis of that information, control the longitudinal positions of the leaves and the lateral position of the support. It is also preferred that the support tilts as it moves laterally along a path. This can be achieved, by example, by bearings that are moveable on suitable guides, or by mounting the support on a plurality of pivot arms of unequal lengths. The lengths of such pivot arms can be adjusted as necessary.
    • 响应于(例如)治疗期间患者的在线CT扫描的实时波束形状调整由包括适于发射治疗辐射束的源的放射治疗装置辅助,用于限定辐射束的准直器,准直器包括多个 的叶片彼此并排设置并且可纵向移动,使得叶片的尖端限定准直器的可变边缘,叶片安装在相对于叶片横向移动的支撑件上。 以这种方式,垂直于叶片运动方向的肿瘤的运动可以通过简单地移动准直器以适应这一点来适应。 优选地,该装置还包括适于接收关于目标体积的位置的信息的控制装置,并且基于该信息控制叶片的纵向位置和支撑件的横向位置。 还优选的是,当支撑件沿着路径横向移动时,支撑件倾斜。 这可以通过例如通过在合适的导轨上可移动的轴承,或者通过将支撑件安装在不等长度的多个枢轴臂上来实现。 这种枢转臂的长度可以根据需要进行调节。