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Efficient hardware implementation for signal reconstruction over multiple analog-to-digital, digital-to-analog conversions in a telecommunication system

机译:电信系统中通过多个模数,数模转换进行信号重构的高效硬件实现

摘要

Method and apparatus for providing an improved quality voice band channel equalization in telecommunication systems employing v.90 transmission standard in which PCM modem signals passing through a digital-to-analog and analog-to-digital conversion processes between a central office switch and a multiple subscriber access system may be reconstructed with improved quality at the A/D converter side by variably adjusting the gain between the digital-to-analog conversion process at the central office switch and the analog-to-digital conversion process at the multiple subscriber access system, and low pass filtering the signal using a second order low pass notch filter to provide a boost of 6 dB at a frequency of 4 KHz.
机译:在采用v.90传输标准的电信系统中提供改进质量的语音频带信道均衡的方法和装置,其中PCM调制解调器信号通过中心局交换机和多路复用器之间的数模和模数转换过程通过可变地调节中心局交换机处的数模转换过程与多用户访问系统处的模数转换过程之间的增益,可以在A / D转换器端以改进的质量重建用户访问系统。 ,然后使用二阶低通陷波滤波器对信号进行低通滤波,以在4 KHz的频率下提供6 dB的增强。

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