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    • 3. 发明授权
    • Method and apparatus to provide simultaneous sensing and transmission for dynamic spectrum access
    • 提供用于动态频谱接入的同时感测和传输的方法和装置
    • US09237043B1
    • 2016-01-12
    • US14475931
    • 2014-09-03
    • Raytheon Company
    • Mark J. BealsDavid E. Mussmann
    • H03D1/04H03D1/06H03K5/01H03K6/04H04B1/10H04L1/00H04L25/08H04L25/03H04B1/12
    • H04L25/03828H04B1/126H04B1/525
    • A multicarrier radio frequency (RF) transceiver implementing dynamic spectrum access (DSA) is capable of sensing a spectral environment and transmitting an RF signal at the same time. The transceiver can cancel an RF transmit signal component within a composite receive signal using a combination of analog and digital cancellation. In one embodiment, analog RF cancellation is performed to reduce the level of a transmit signal component of a composite receive signal before the signal reaches an RF receiver. The RF cancellation may be used to reduce the transmit signal component to a level that maintains the linear operation of the RF receiver. Digital cancellation may be performed to reduce transmit signal remnants within an output signal of the RF receiver. Digital cancellation may be performed on a subcarrier-by-subcarrier basis in some implementations.
    • 实现动态频谱接入(DSA)的多载波射频(RF)收发机能够同时感测频谱环境和发射RF信号。 收发器可以使用模拟和数字消除的组合来消除复合接收信号内的RF发射信号分量。 在一个实施例中,执行模拟RF消除以在信号到达RF接收器之前降低复合接收信号的发射信号分量的电平。 RF取消可以用于将发送信号分量减小到维持RF接收机的线性操作的水平。 可以执行数字消除以减少RF接收机的输出信号内的发射信号残余。 在一些实现中,可以在逐副载波的基础上执行数字消除。
    • 5. 发明授权
    • Circuits and methods for processing signals generated by a circular vertical hall (CVH) sensing element in the presence of a multi-pole magnet
    • 用于在存在多极磁体的情况下处理由圆形垂直霍尔(CVH)感测元件产生的信号的电路和方法
    • US09541424B2
    • 2017-01-10
    • US15186433
    • 2016-06-18
    • Allegro MicroSystems, LLC
    • Andreas P. FriedrichAndrea Foletto
    • G01R33/07G01D5/14
    • G01D5/145G01B7/30G01D5/2451G01R33/0023G01R33/007G01R33/072G01R33/077
    • Described embodiments provide a magnetic field sensor has a circular vertical Hall (CVH) sensing element with a plurality of vertical Hall elements disposed over a common implant region in a substrate. The magnetic field sensor generates output signals responsive to a magnetic field generated by a multi-pole magnet having a plurality of north poles and also a plurality of south poles. An angle sensor generates an angle signal representative of an angle of a direction component of the magnetic field. A pole pair counter generates a count signal representative of a count of a number of the pole pairs of the multi-pole magnet that move past the CVH sensing element. An angle interpolation module generates a reconstructed angle signal representative of an angular position of the multi-pole magnet relative to the CVH sensing element based upon the count signal and the angle signal. Corresponding methods are also described.
    • 描述的实施例提供一种具有圆形垂直霍尔(CVH)感测元件的磁场传感器,其具有设置在基板中的公共注入区域上的多个垂直霍尔元件。 磁场传感器响应于具有多个北极以及多个南极的多极磁铁产生的磁场产生输出信号。 角度传感器产生表示磁场的方向分量的角度的角度信号。 极对计数器产生表示移动经过CVH感测元件的多极磁体的极对数的计数的计数信号。 角度插补模块基于计数信号和角度信号产生代表多极磁体相对于CVH感测元件的角位置的重建角度信号。 还描述了相应的方法。
    • 7. 发明授权
    • Method and system for characterizing an array antenna using near-field measurements
    • 使用近场测量来表征阵列天线的方法和系统
    • US09331751B2
    • 2016-05-03
    • US14451466
    • 2014-08-05
    • Raytheon Company
    • Thomas V. SikinaJack J. SchussJoseph E. Hilliard, Jr.
    • H04B5/00G01D18/00
    • H04B5/0043G01D18/00H01Q3/267H04B7/0865H04B17/0085H04B17/21
    • Described embodiments calibrate an array antenna using near-field antenna measurements individually for each antenna element in an antenna under test (AUT). A signal is received at a first AUT antenna element from an antenna probe assembly by transmitting from the antenna probe assembly at each of multiple known probe locations in a near-field of the AUT. A signal is received at each probe location by transmitting from the first antenna element of the AUT to the antenna probe assembly. The received signals are combined into a combined signal for the first antenna element that de-correlates multi-path in the combination result. The combined signal is processed to generate a calibration coefficient for the first AUT antenna element. Remote boundary condition (RBC) testing is performed to reduce temporal instability. The multiple known probe locations lie on one of the following: a planar surface, a cylindrical surface, and a spherical surface.
    • 所描述的实施例使用对于被测天线(AUT)中的每个天线元件单独使用近场天线测量来校准阵列天线。 在天线探头组件的第一AUT天线元件处,通过在天线探头组件中在AUT的近场中的多个已知探测位置的每一个处发送信号。 通过从AUT的第一天线元件发送到天线探针组件,在每个探测位置处接收信号。 接收到的信号被组合成用于第一天线元件的组合信号,该组合信号使组合结果中的多路径不相关。 处理组合信号以产生第一AUT天线元件的校准系数。 进行远程边界条件(RBC)测试以减少时间不稳定性。 多个已知的探针位置位于以下之一:平坦表面,圆柱形表面和球形表面。