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    Differential pulse encoding and decoding for binary data transmissions
    5.
    发明授权
    Differential pulse encoding and decoding for binary data transmissions 失效
    用于二进制数据传输的差分脉冲编码和解码

    公开(公告)号：US5625645A

    公开(公告)日：1997-04-29

    申请号：US506625

    申请日：1995-07-25

    申请人： Paul F. Greier ,  Lawrence S. Mok

    发明人： Paul F. Greier ,  Lawrence S. Mok

    IPC分类号： H03K5/003 ,  H04B14/06 ,  H04B4/06

    CPC分类号： H03K5/003 ,  H04B14/06

    摘要： A differential pulse encoding and decoding approach for binary data transmissions, such as binary frequency shift keying (BFSK) data transmissions, for sending and recovering a serial, binary digital data stream by differentiating the pulses thereof. A method and system are disclosed for transmitting from a transmitter to a receiver a digital data signal containing a stream of binary data bits having a first high value and a second low value. At the transmitter, the digital signal is transformed into a differential signal which contains pulses corresponding to transitions between the first and second values. The digital signal is transformed into the differential signal by an encoder which can be a differentiator circuit or an RC high-pass filter circuit. If frequency spectrum is a concern, a low-pass filter can filter the output of the encoder. The differential signal is then transmitted, and received by the receiver which reconstructs the original digital signal therefrom. The transmission of the differential signal can be by a transmission cable or by an FM transmitter and receiver. At the receiver, the digital signal is reconstructed from the differential signal by a decoder circuit which functions to produce a high voltage output signal when the input signal is higher than a reference high voltage, and a low voltage output signal when the input signal is lower than a reference low voltage. A low-pass filter can also filter the input to the decoder circuit.

    摘要翻译： 用于二进制数据传输的差分脉冲编码和解码方法，例如二进制频移键控（BFSK）数据传输，用于通过区分其脉冲发送和恢复串行二进制数字数据流。 公开了一种用于从发射机向接收机发送包含具有第一高值和第二低值的二进制数据比特流的数字数据信号的方法和系统。 在发射机处，数字信号被转换成包含对应于第一和第二值之间的跃迁的脉冲的差分信号。 数字信号通过可以是微分电路或RC高通滤波器电路的编码器转换成差分信号。 如果考虑频谱，低通滤波器可以对编码器的输出进行滤波。 然后差分信号被发送并由接收器接收，该接收机从其重建原始数字信号。 差分信号的传输可以通过传输电缆或由FM发射器和接收器传输。 在接收机处，数字信号由差分信号由解码器电路重建，该解码器电路当输入信号高于参考高电压时产生高电压输出信号，当输入信号较低时产生低电压输出信号 比参考低电压。 低通滤波器也可以对解码器电路的输入进行滤波。