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公开(公告)号：US4853839A
公开(公告)日：1989-08-01
申请号：US251665
申请日：1988-09-29
CPC分类号： H01Q3/08 , G01S13/723
摘要： Apparatus and methods for tracking a positioning system for antennas and other devices. Hardware of the invention contains circuitry which when given velocity information, changes its output position information at a specified rate. The hardware may also be triggered to capture a sample of such output position information to provide feedback to the firmware of the invention, which implements a position tracking algorithm. The algorithm utilizes two consecutive input position samples, the time between those samples and the feedback information corresponding to the last position input sample to calculate the velocity to be applied to the position tracking hardware until a new position input sample is available. When the new sample is available, a new velocity is calculated and applied to the hardware and the process is repeated. Between position input samples, the hardware updates the output position to correspond to the motion of the positioning system. The invention minimizes group delay and allows for more convenient sampling from a remote positioner.
摘要翻译： 用于跟踪天线和其他设备的定位系统的装置和方法。 本发明的硬件包含电路，当给定速度信息时，其指定速率改变其输出位置信息。 还可以触发硬件以捕获这种输出位置信息的样本，以向实现位置跟踪算法的本发明的固件提供反馈。 该算法使用两个连续的输入位置采样，这些采样之间的时间和对应于最后位置输入采样的反馈信息，以计算要施加到位置跟踪硬件的速度，直到新的位置输入采样可用。 当新样本可用时，计算新的速度并将其应用于硬件，并重复该过程。 在位置输入采样之间，硬件更新输出位置以对准定位系统的运动。 本发明使组延迟最小化，并允许从远程定位器更方便地采样。
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2.发明授权Method and apparatus for autoranging, quadrature signal generation, digital phase reference, and calibration in a high speed RF measurement receiver 失效高速射频测量接收机的自适应方法和装置，信号生成，数字相位参考和校准
公开(公告)号：US5125008A
公开(公告)日：1992-06-23
申请号：US491186
申请日：1990-03-09
CPC分类号： G01S7/4004 , G01S7/4021 , G01S2007/4073
摘要： Improved autoranging, calibration, and complex signal detection circuits for an intermediate frequency (IF) stage in a radio frequency (RF) measurement receiver. An improved autoranging circuit sets a gain stage of a selectively variable gain amplifier prior to each data acquisition cycle, to provide for wide dynamic range and rapid time domain response. An improved complex signal detection circuit for generating an inphase (I) and quadrature phase (Q) signal from an input IF signal in a signal channel and a reference channel is constructed with a novel commutating demodulator circuit. Calibration is effected with an improved digital phase reference method and apparatus wherein effectivr 90.degree. phase shifts are digitially generated by shifting the generation sequence of timing signals for the complex signal detection circuit instead of phase shifting a known calibration signal, obviating the need for precision phase shifters, Doppler frequency generators, or Fourier transforms to obtain correction components for the optimum detection of complex signals.
摘要翻译： 用于射频（RF）测量接收机中的中频（IF）级的改进的自动量程，校准和复信号检测电路。 改进的自动量程电路在每个数据采集周期之前设置选择性可变增益放大器的增益级，以提供宽动态范围和快速时域响应。 一种用于在信号通道和参考通道中从输入IF信号产生同相（I）和正交相位（Q）信号的改进的复信号检测电路由新的换向解调器电路构成。 通过改进的数字相位参考方法和装置实现校准，其中通过移位复信号检测电路的定时信号的产生序列来代替相移已知校准信号来数字地产生90°相移，从而避免了对精度相位的需要 移相器，多普勒频率发生器或傅里叶变换，以获得用于复杂信号的最佳检测的校正分量。
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