公开(公告)号：US3955137A

公开(公告)日：1976-05-04

申请号：US494126

申请日：1974-08-02

申请人： John B. Harrington ,  Michael Waldner

发明人： John B. Harrington ,  Michael Waldner

IPC分类号： G01R23/00 ,  H03J7/32

CPC分类号： H03J7/32 ,  G01R23/00

摘要： A compressive or "microscan" signal processor adapted for the simultaneous measurement of multifrequency signal components which encompass a broad frequency spectrum. In accordance with one embodiment of the invention, the applied signals are processed through a mixer which is driven by a linear frequency versus time waveform sweep signal. The output from the mixer is applied to one input port of a nonlinear correlator, and a second input port of the correlator is supplied with a linear frequency versus time waveform signal whose slope is opposite from that of the sweep signal applied to the mixer. The output signal from the correlator comprises a series of pulses which are displaced in time as a function of the frequency of the corresponding portions of the applied signals, and whose amplitudes are representative of the relative energy distribution of the applied signals.

摘要翻译： 适用于同时测量包含宽频谱的多频信号分量的压缩或“微”信号处理器。 根据本发明的一个实施例，所施加的信号通过由线性频率对时间波形扫描信号驱动的混频器来处理。 来自混频器的输出被施加到非线性相关器的一个输入端口，并且相关器的第二输入端口被提供有与施加到混频器的扫描信号的斜率相反的线性频率对时间波形信号。 来自相关器的输出信号包括一系列随时间变化的脉冲，这些脉冲作为施加信号的相应部分的频率的函数，其幅度表示所施加的信号的相对能量分布。

公开(公告)号：US4092603A

公开(公告)日：1978-05-30

申请号：US723870

申请日：1976-09-16

申请人： John B. Harrington

发明人： John B. Harrington

IPC分类号： G01S13/28 ,  H04B1/10

CPC分类号： G01S13/288

摘要： The pulse envelope of a chirped or phase coded pulse is separated from the phase modulation in such a way that the bandwidth of the signal output is decreased while the pulse width is maintained. This result is accomplished by injecting the pulse into two mixers coupled in parallel. The first mixer combines the coded pulse with a constant frequency signal generated by a local oscillator to obtain a resultant signal having an upper sideband whose phase is the sum of the phases of the coded pulse and a lower sideband whose phase is the difference between the phases of the two signals injected into the first mixer. The lower sideband of the resultant signal is filtered out with an upper sideband bandpass filter to obtain an upper sideband signal which is combined with the coded pulse in a second mixer. The second mixer output is phased through a lower sideband bandpass filter to obtain an output pulse having a phase independent of the phase of the coded pulse input, a pulse width equal to that of the coded pulse, and a pulse amplitude proportional to that of the coded pulse. Pulse compression in the frequency domain is therefore accomplished.

摘要翻译： 啁啾或相位编码脉冲的脉冲包络与相位调制分离，使得信号输出的带宽在保持脉冲宽度的同时减小。 该结果通过将脉冲注入到并联耦合的两个混合器中来实现。 第一混频器将编码脉冲与由本地振荡器产生的恒定频率信号组合，以获得具有上边带的合成信号，其相位是编码脉冲的相位之和，其相位是相位之间的差 注入第一混合器的两个信号。 所得信号的下边带用上边带带通滤波器滤波，以获得在第二混频器中与编码脉冲相组合的上边带信号。 第二混频器输出通过下边带带通滤波器相位，以获得具有与编码脉冲输入的相位无关的相位的输出脉冲，与编码脉冲的脉冲宽度相等的脉冲宽度，以及与 编码脉冲。 因此可实现频域的脉冲压缩。

公开(公告)号：US3940720A

公开(公告)日：1976-02-24

申请号：US466426

申请日：1974-05-02

申请人： John B. Harrington

发明人： John B. Harrington

IPC分类号： H03H9/02 ,  H03H9/42 ,  H03H9/26 ,  H03H9/30 ,  H03H9/32

CPC分类号： H03H9/02771 ,  H03H9/42

摘要： The recirculating tapped delay line in accordance with the invention is a combination electrical and acoustic recirculation network that includes a selected number of acoustic surface wave circulating subloops included in an electrical primary feedback loop or network with each subloop having a selected number of taps. Each acoustic subloop includes track changing multistrip couplers that inject the signal into the loop, multistrip reflecting track changers at each end of the surface wave path, tapping transducers or multistrip couplers in both forward and reverse acoustic paths and a multistrip loop cancelling switch for suppressing the recirculating signal as desired. Because the recirculation is entirely acoustic in each subloop, the components which contribute substantially to distortion are utilized with less frequency so that the overall distortion after specific storage time is reduced. Also, by repeated recirculation through each subloop, a substantially larger effective number of taps may be realized per actual number of taps during each electrical feedback around the primary overall loop. The combination of primary and subloops in accordance with the invention effectively multiplies the actual number of taps in the subloops by the number of combined acoustic and electrical recirculations, all with a minimum of signal loss and distortion.

摘要翻译： 根据本发明的再循环抽头延迟线是组合的电和声循环网络，其包括包括在电主要反馈回路或网络中的选定数量的声表面波循环子环，每个子循环具有选定数量的抽头。 每个声学子环包括将信号注入到环路中的轨迹变化多分量耦合器，在表面波路径的每个端部处的多波段反射轨道变换器，正向和反向声学路径中的分接换能器或多段耦合器，以及用于抑制 再循环信号。 由于在每个次循环中再循环完全是声学的，所以以更小的频率利用有助于实现失真的部件，从而降低特定存储时间之后的整体失真。 而且，通过每个次循环的反复再循环，在围绕主要整体回路的每个电反馈期间，每个抽头的实际数量可以实现更大的有效数量的抽头。 根据本发明的初级和次级组合有效地将子环中的抽头的实际数量乘以组合的声和电循环的数量，全部具有最小的信号损失和失真。