数字语音的电力线载波全双工通信系统设计

Design of power line carrier digital voice communication system

语音信号的电力线载波传输已经有了广泛的应用,但均是以模拟方式来传输信号的,故通信质量不高,抗干扰能力差,以数字信号作为语音传输方式,就可以克服上述缺点。以新型语音压缩编解码器AMBE2000和电力载波扩频调制解调芯片SC11128为基础的设计,就可以使当前先进的语音压缩技术以及基于恶劣电力网环境的低压电力线载波技术得到充分的应用,结合单片机对电路状态的控制以及双口RAM对数据的处理从而实现了电力线信道的全双工数字语音通信。

It is very familiar to transfer voice by electric power line, but the signals are all by the way of analog in most of transmissions, so the quality and ability of anti-jamming of communication is worse. The conventional voice compression method and its baud-rate can＇t satisfy the demand of current digital power line carrier chip. The design, which adopts new voice compression eneoder-deeoder AMBE2000 and the SC1128 power line carrier spectrum communication modem chip, is the combination of current advanced voice compression technology with low voltage power line carrier technology based on the bad power network environment; it may enable the digital voice signal to be transferred with good voice quality. At the same time, a combination of the serial communication technology of the single-chip microcomputer with high baud rate of the power line carrier chip, which realizes entire duplex digital voice communication power line based on the principle of time division multiplex. through a pair of low voltage power line based on the principle of time division multiplex.