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介绍了在开发数字式电力线载波通信系统过程中涉及的一项关键技术——电力线载波数字接入技术。数字式电力线载波通信系统采用话音压缩、数字编码、数字复接等技术 ,完成话音与远动数据的汇合 ,以 TCM(格栅编码调制 )方式在电力线上传输高频信号 ,在接收端采用 TCM解调、Viterbi译码、自适应均衡等技术再生恢复出原始信息。其中高速 Modem采用 AD公司 Modem专用开发芯片 ADSP— 2 1 mod870 ,以一整套软、硬件解决方案高效实现了专用 Modem的性能要求
Introduced a key technology involved in the development of digital power line carrier communication system - power line carrier digital access technology. Digital power line carrier communication system uses voice compression, digital coding, digital multiplexing and other technologies to complete the convergence of voice and telecontrol data to TCM (Grating Code Modulation) way to transmit high-frequency signals on the power line, the receiver using TCM Demodulation, Viterbi decoding, adaptive equalization and other techniques to restore the original reproduction of the information. One high-speed Modem using AD’s Modem dedicated development chip ADSP-2 1 mod870, with a set of software and hardware solutions to achieve a dedicated efficient Modem performance requirements