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1. 发明授权

US5241700A Receiver of an electromagnetic signal with a known nominal frequency, liable to be affected by an unknown variation, in particular by the Doppler shift 失效
标题翻译：具有已知标称频率的电磁信号的接收器，有可能受到未知变化的影响，特别是多普勒频移
公开(公告)号：US5241700A
公开(公告)日：1993-08-31
申请号：US693581
申请日：1991-04-30
申请人： Michel Geesen , Thierry Potier , Patrick Souty , Daniel Wozniak
发明人： Michel Geesen , Thierry Potier , Patrick Souty , Daniel Wozniak
IPC分类号： B64G1/22 , G01S1/38 , G01S11/10
CPC分类号： G01S11/10
摘要： The invention concerns a feedback control loop comprising a mixer comprising a first input receiving an electromagnetic signal, and a second input receiving a first local signal; an intermediate frequency line mounted between the output of the mixer and the input of a phase comparator which receives on a second input a second local signal and has an output; and a feedback line connected between this output and the second input of the input mixer, and comprising a loop filter controlling a variable oscillator for providing the said first local signal as well as a second variable oscillator for providing the second local signal. The loop filter comprises (i) a proportional section mounted between the output and the control input of a second variable oscillator; (ii) an integral variable section mounted between the output of the proportional section and the control input of the first variable oscillator; and controller capable of progressively changing the parameters of the proportional and integral sections so as to progressively reduce the bandwidth of the phase control system and to increase the filtering of the noise and of the interference signals superposed on to the electromagnetic signal.
摘要翻译：本发明涉及一种反馈控制回路，包括：混合器，包括接收电磁信号的第一输入端和接收第一局部信号的第二输入端; 安装在所述混频器的输出端和相位比较器的输入端之间的中频线，其在第二输入端接收第二本地信号并具有输出; 以及连接在该输出和输入混频器的第二输入之间的反馈线，并且包括控制用于提供所述第一本地信号的可变振荡器的环路滤波器以及用于提供第二本地信号的第二可变振荡器。环路滤波器包括（i）安装在第二可变振荡器的输出和控制输入之间的比例部分; （ii）安装在比例部分的输出和第一可变振荡器的控制输入之间的积分可变部分; 以及能够逐渐改变比例和积分部分的参数的控制器，以便逐渐降低相位控制系统的带宽，并增加对叠加在电磁信号上的噪声和干扰信号的滤波。

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