Spectral Phase Analysis For Precision Ranging
    12.
    发明申请
    Spectral Phase Analysis For Precision Ranging 有权
    精密测距光谱相分析

    公开(公告)号:US20120194823A1

    公开(公告)日:2012-08-02

    申请号:US13361888

    申请日:2012-01-30

    IPC分类号: G01B9/02 G01S13/86 G01B11/02

    摘要: Interferometric path length measurements using frequency-domain interferometry form the basis of several measurement techniques, including optical frequency domain reflectometry (OFDR), optical coherence tomography (OCT), and frequency-modulated continuous wave (FMCW) radar and lidar. A phase-sensitive and self-referenced approach to frequency-domain interferometry yields absolute and relative path length measurements with axial precision orders of magnitude better than the transform-limited axial resolution of the system.

    摘要翻译: 使用频域干涉测量的干涉路径长度测量形成了几种测量技术的基础,包括光频域反射测量(OFDR),光学相干断层扫描(OCT)和调频连续波(FMCW)雷达和激光雷达。 相位敏感和自参考的频域干涉测量方法产生绝对和相对路径长度测量,轴向精度数量级优于系统的变换限制轴向分辨率。

    Cellular automaton for generating random data
    13.
    发明授权
    Cellular automaton for generating random data 失效
    用于生成随机数据的蜂窝自动机

    公开(公告)号:US4961159A

    公开(公告)日:1990-10-02

    申请号:US392637

    申请日:1989-08-11

    IPC分类号: G01R31/3181 G06F7/58 H03K3/84

    摘要: A cellular automaton which generates pseudorandom data comprises a series of cells arranged such that each cell receives signals from electrically adjacent first and second cells. Each cell comprises a D-type flip-flop for storing a data bit, and logic circuitry which couples the flip-flop of the cell to those of associated first and second adjacent cells. The logic circuitry responds to the current state of the data bits stored by a particular cell and its associated first and second electrically adjacent cells by changing the value of the data bit stored by the particular cell according to a predetermined one of the following relationships:a(t+1)=a .sub.first (t) XOR a.sub.second (t), ora(t+1)=a .sub.first (t) XOR a(t) XOR a.sub.second (t)where, a(t) represents the current state of the data bit stored by the particular cell, a(t+1) represents the next state of the data bit stored by the particular cell, a.sub.first (t) represents the current state of the data bit sotred by the first electrically adjacent cell, and a.sub.second (t) represents the current state of the data bit stored by the second electrically adjacent cell.

    摘要翻译: 产生伪随机数据的细胞自动机包括一系列细胞,其被布置成使得每个细胞从电相邻的第一和第二细胞接收信号。 每个单元包括用于存储数据位的D型触发器和将单元的触发器耦合到相关联的第一和第二相邻单元的触发器的逻辑电路。 逻辑电路通过根据以下关系中的预定的一个改变由特定小区存储的数据位的值来响应由特定单元及其相关联的第一和第二电相邻单元存储的数据位的当前状态:a (t + 1)=第一(t)XOR第二(t)或a(t + 1)=第一(t)XOR a(t)XOR第二(t)其中,a(t) 由特定单元存储的数据位的a(t + 1)表示由特定单元存储的数据位的下一状态,第一(t)表示第一电相邻单元所记录的数据位的当前状态, 并且第二(t)表示由第二电相邻单元存储的数据位的当前状态。