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1. 发明授权

US4092618A Discrete transversal filter 失效
标题翻译：离散过滤器
公开(公告)号：US4092618A
公开(公告)日：1978-05-30
申请号：US748698
申请日：1976-12-08
申请人： Loic Bernard Yves Guidoux
发明人： Loic Bernard Yves Guidoux
IPC分类号： H03H15/00 , H03H17/02 , H03H17/06 , H04B3/04 , H03H7/10 , H03H5/00
CPC分类号： H03H17/0227 , H03H17/0294
摘要： Digital transversal filter for realizing a lowpass filter with a cut-off frequency f.sub.g and an impulse response h.sub.1 (i), a lowpass filter having a cut-off frequency 2f.sub.g which has a transfer characteristic which is in phase with the first-mentioned lowpass filter, as well as a lowpass filter with a quadrature transfer characteristic of the in-phase filter.

2. 发明授权

US4035725A Automatic passband equalizer for data transmission systems 失效
标题翻译：用于数据传输系统的自动通带均衡器
公开(公告)号：US4035725A
公开(公告)日：1977-07-12
申请号：US642079
申请日：1975-12-18
申请人： Loic Bernard Yves Guidoux
发明人： Loic Bernard Yves Guidoux
IPC分类号： H03H15/00 , H03H21/00 , H04B3/06 , H04L27/01 , H03H7/36
CPC分类号： H04L27/01
摘要： Passband equalizer in a system for data transmission by means of phase modulation. The equalizer comprises two filters in quadrature with adjustable coefficients. Difference circuits connected to the equalizer output form difference signals between the two quadrature components of the equalizer output signal and the two components of an estimated signal which is especially formed from phase jumps associated with the transmitted data signal. A pair of difference circuits is associated with each pair of corresponding coefficients of the two filters and forms difference signals from both components of the passband signals available in the two filters in places corresponding with the said pair of coefficients. The changes in the coefficients are calculated from the above said difference signals.
摘要翻译：通过相位调制进行数据传输的系统中的通带均衡器。均衡器包括两个具有可调整系数的正交滤波器。连接到均衡器输出的差分电路在均衡器输出信号的两个正交分量和估计信号的两个分量之间形成差分信号，该估计信号尤其由与所发送的数据信号相关联的相位跳变形成。一对差分电路与两个滤波器的每对相应系数相关联，并且在对应于所述一对系数的位置中形成两个滤波器中可用的通带信号的两个分量的差分信号。从上述差分信号计算出系数的变化。

3. 发明授权

US3980961A Frequency demodulator for a FSK data transmission system 失效
标题翻译： FSK数据传输系统的频率解调器
公开(公告)号：US3980961A
公开(公告)日：1976-09-14
申请号：US587268
申请日：1975-06-16
申请人： Loic Bernard Yves Guidoux , Daniel Jose Francois Lommer
发明人： Loic Bernard Yves Guidoux , Daniel Jose Francois Lommer
IPC分类号： H04L27/14 , H04L27/156 , H03D3/00
CPC分类号： H04L27/1563 , H04L27/14
摘要： Frequency demodulator for a frequency-shift-keying data transmission system, which demodulator comprises, in cascade, a monostable circuit, a lowpass filter and a voltage comparator to which a threshold voltage is applied. The demodulator further comprises a switch which is operated by the monostable circuit and supplies to the lowpass filter either one or the other of two voltages derived from the same supply source and having different polarities. The threshold voltage is fixed at zero and in order to correct the bias distortion one of the said two voltages is adjusted.
摘要翻译：用于频移键控数据传输系统的频率解调器，该解调器级联包括施加阈值电压的单稳态电路，低通滤波器和电压比较器。解调器还包括由单稳态电路操作的开关，并且向低通滤波器提供源自相同电源并具有不同极性的两个电压中的一个或另一个。阈值电压固定为零，为了校正偏置失真，调整所述两个电压之一。

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