公开(公告)号：US3784915A

公开(公告)日：1974-01-08

申请号：US3784915D

申请日：1971-06-16

Applicant: CIT ALCATEL

Inventor： OSWALD J ,  RAINSARD Y

IPC: G01S7/35 ,  G06G7/19 ,  H04B7/08 ,  H04B1/06

CPC classification number: H04B7/0857 ,  G01S7/354 ,  G01S2007/358 ,  G06G7/1928 ,  H04B7/0837

Abstract: Device for improving the signal/noise ratio of a common signal received on three aerials utilizing correlation between the sum and difference values of combinations of the signals from the three aerials to eliminate or substantially suppress the noise received with the common signal.

Abstract translation: 利用来自三个天线的信号的组合的和值和差值之间的相关性来改善在三个天线上接收的公共信号的信号/噪声比的装置，以消除或基本上抑制由公共信号接收的噪声。

公开(公告)号：US3737783A

公开(公告)日：1973-06-05

申请号：US3737783D

申请日：1971-05-14

Applicant: CIT ALCATEL

Inventor： OSWALD J ,  RAINSARD Y

IPC: G01S7/42 ,  G01S13/87 ,  G06G7/19 ,  H04B7/08 ,  H04B1/12

CPC classification number: H04B7/0894 ,  G01S7/42 ,  G01S13/87 ,  G06G7/1928 ,  H04B7/0837 ,  H04B7/0854

Abstract: A signal-to-noise ratio improving device for processing narrow frequency band signals received by two wave collectors (transducers or antennas) and respectively delivered at one and the other of two input terminals in the form of identical useful signals on each of which a different quasi-stationary noise is superposed. The device forms the sum and difference of the noiseaffected signals received at said input terminals and the said difference is processed in a circuit comprising amplitude regulating means, first and second correlators each having two inputs to one of which is fed the said sum and to the other of which are applied, for said first correlator, said amplituderegulated difference and, for said second correlator, the latter said difference delayed by a fixed time interval. The correlators deliver at their respective outputs signals proportional to the time average of the product of the signals applied to their two inputs. The averaged signals are respectively applied to a first input of each one of two multipliers, to a second input of which are respectively applied said amplitude-regulated difference and said delayed amplitude-regulated difference. The outputs of the multipliers deliver new signals which are applied to the inputs of an adder, and the output signal from said adder is applied to an input of a subtractor, to the other input of which said sum of noise-affected signals is applied. The output of the subtractor delivers the improved signal.

Abstract translation: 一种信噪比改善装置，用于处理由两个收集器（换能器或天线）接收的窄频带信号，并以相同的有用信号的形式分别在两个输入端子中的一个和另一个输送端子上传送不同的信号 准静态噪声叠加。 所述装置形成在所述输入端接收的噪声影响信号的和和差，并且在包括幅度调节装置的电路中处理所述差异，每个具有两个输入的第一和第二相关器，其中一个被输入所述和， 对于所述第一相关器，对于所述第一相关器应用所述幅度调节差，并且对于所述第二相关器，后者所述差延迟固定时间间隔。 相关器在其各自的输出端输出与施加到它们的两个输入端的信号的乘积的时间平均成比例的信号。 平均信号分别施加到两个乘法器中的每一个的第一输入端，其第二输入端分别施加所述幅度调节差和所述延迟幅度差值。 乘法器的输出递送施加到加法器的输入端的新信号，并且来自所述加法器的输出信号被施加到减法器的输入，并被施加到施加了噪声影响信号的总和的另一个输入端。 减法器的输出提供改进的信号。