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1. 发明授权

US5778055A System for, and method of, transmitting and receiving through telephone lines signals representing data 失效
标题翻译：通过电话线发送和接收表示数据的信号的系统和方法
公开(公告)号：US5778055A
公开(公告)日：1998-07-07
申请号：US717248
申请日：1996-09-20
申请人： Eric Paneth , Mordechai Segal , Boaz Rippin , Ehud H. Rokach
发明人： Eric Paneth , Mordechai Segal , Boaz Rippin , Ehud H. Rokach
IPC分类号： H03H21/00 , H04B3/23 , H04L7/04 , H04L7/06 , H04L7/10 , H04L25/00 , H04L25/03 , H04L25/48 , H04M11/00
CPC分类号： H04L25/00 , H04B3/23 , H04L25/03057 , H04L25/03866 , H04L7/043 , H04L7/06 , H04L7/10
摘要： Analog signals representing individual digital values (.+-.1, .+-.3) pass through a telephone line to a receiver. These signals may be first provided in a pseudo random sequence. A linear echo canceller and a first adder eliminate, to an extent, echo signals resulting from second analog signals transmitted on the same telephone line by the receiver. A non-linear echo canceller and a second adder further reduce the echo signals and specifically reduce non-linear components in the echo signals. Adjustable signal delays achieve optimal performance of the linear and non-linear echo cancellers. An equalizer containing four (4) different modules then compensates for signal distortions introduced by the telephone line and minimizes the effect of noise in the telephone line. The equalizer modules are a digital gain control element, a feed forward digital filter and two (2) feedback digital filters. A detector module produces in one of several different ways at the receiver an estimate of the digital data (.+-.1, .+-.3) transmitted at the other end of the telephone line. The detector either extracts the digital information based on peaks in the received (non-equalized) signal or by adding the equalized signals with preset threshold values. A scrambler-descrambler module locally generates a replica of the digital symbols transmitted in analog form at the other end of the telephone line, based on a limited number (e.g. 23) of correctly detected digital values. The scrambler-descrambler module may also operate as a descrambler to recover data scrambled by the transmitter at the other end.
摘要翻译：表示各个数字值（+/- 1，+/- 3）的模拟信号通过电话线路传送到接收器。这些信号可以首先以伪随机序列提供。线性回波消除器和第一加法器在一定程度上消除由接收器在相同电话线上发送的第二模拟信号产生的回波信号。非线性回波消除器和第二加法器进一步减少回波信号并且具体地减少回波信号中的非线性分量。可调节的信号延迟实现了线性和非线性回波消除器的最佳性能。包含四（4）个不同模块的均衡器然后补偿由电话线引入的信号失真，并最大限度地减少电话线路中噪声的影响。均衡器模块是数字增益控制元件，前馈数字滤波器和两（2）个反馈数字滤波器。检测器模块在接收机处以几种不同的方式之一产生在电话线的另一端传输的数字数据（+/- 1，+/- 3）的估计。检测器根据接收（非均衡）信号中的峰值提取数字信息，或通过将均衡信号与预设阈值相加。扰码解扰器模块基于有限数量（例如23个）正确检测的数字值本地生成在电话线的另一端以模拟形式传输的数字符号的副本。加扰器解扰器模块还可以作为解扰器来操作，以恢复另一端由发射机加扰的数据。

2. 发明授权

US5627885A System for, and method of, transmitting and receiving through telephone lines signals representing data 失效
标题翻译：通过电话线发送和接收表示数据的信号的系统和方法
公开(公告)号：US5627885A
公开(公告)日：1997-05-06
申请号：US195628
申请日：1994-02-14
申请人： Eric Paneth , Mordechai Segal , Boaz Rippin , Ehud H. Rokach
发明人： Eric Paneth , Mordechai Segal , Boaz Rippin , Ehud H. Rokach
IPC分类号： H03H21/00 , H04B3/23 , H04L7/04 , H04L7/06 , H04L7/10 , H04L25/00 , H04L25/03 , H04L25/48 , H04M11/00
CPC分类号： H04L25/00 , H04B3/23 , H04L25/03057 , H04L25/03866 , H04L7/043 , H04L7/06 , H04L7/10
摘要： Analog signals representing individual digital values (.+-.1, .+-.3) pass through a telephone line to a receiver. These signals may be first provided in a pseudo random sequence. A linear echo canceller and a first adder eliminate, to an extent, echo signals resulting from second analog signals transmitted on the same telephone line by the receiver. A non-linear echo canceller and a second adder further reduce the echo signals and specifically reduce non-linear components in the echo signals. Adjustable signal delays achieve optimal performance of the linear and non-linear echo cancellers. An equalizer containing four (4) different modules then compensates for signal distortions introduced by the telephone line and minimizes the effect of noise in the telephone line. The equalizer modules are a digital gain control element, a feed forward digital filter and two (2) feedback digital filters. A detector module produces in one of several different ways at the receiver an estimate of the digital data (.+-.1, .+-.3) transmitted at the other end of the telephone line. The detector either extracts the digital information based on peaks in the received (non-equalized) signal or by adding the equalized signals with preset threshold values. A scrambler-descrambler module locally generates a replica of the digital symbols transmitted in analog form at the other end of the telephone line, based on a limited number (e.g. 23) of correctly detected digital values. The scrambler-descrambler module may also operate as a descrambler to recover data scrambled by the transmitter at the other end.
摘要翻译：表示各个数字值（+/- 1，+/- 3）的模拟信号通过电话线路传送到接收器。这些信号可以首先以伪随机序列提供。线性回波消除器和第一加法器在一定程度上消除由接收器在相同电话线上发送的第二模拟信号产生的回波信号。非线性回波消除器和第二加法器进一步减少回波信号并且具体地减少回波信号中的非线性分量。可调节的信号延迟实现了线性和非线性回波消除器的最佳性能。包含四（4）个不同模块的均衡器然后补偿由电话线引入的信号失真，并最大限度地减少电话线路中噪声的影响。均衡器模块是数字增益控制元件，前馈数字滤波器和两（2）个反馈数字滤波器。检测器模块在接收机处以几种不同的方式之一产生在电话线的另一端传输的数字数据（+/- 1，+/- 3）的估计。检测器根据接收（非均衡）信号中的峰值提取数字信息，或通过将均衡信号与预设阈值相加。扰码解扰器模块基于有限数量（例如23个）正确检测的数字值本地生成在电话线的另一端以模拟形式传输的数字符号的副本。加扰器解扰器模块还可以作为解扰器来操作，以恢复另一端由发射机加扰的数据。

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