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OFDM电力线载波通信系统的AGC实现
引用本文:何世彪,杨迷,张青,席亚明.OFDM电力线载波通信系统的AGC实现[J].世界科技研究与发展,2013(6):720-722.
作者姓名:何世彪  杨迷  张青  席亚明
作者单位:重庆大学通信工程学院,重庆400044
摘    要:针对电力线载波通信信道衰减比较严重,具有时变性,在突发通信模式卞的正交频分复用(OFDM)系统中信号发送不连续的问题,提出一种适用于基于OFDM技术的电力线载波通信系统使用的自动增益控钠(AGC)方案。本方案先进行同步检测,再进行AGC控制,利用前导序列一个符号的能量大小进行增益系数的控制。将本方案应用于G3电力线载波协议(G3-PLC)系统中,并在FPGA上进行实现。仿真和实现效果表明,本文提出的方案结构简单,收敛速度快,遣行可靠。

关 键 词:正交频分复用  电力线载波通信  G3电力线载波通信协议  自动增益控制  现场可编程门阵列

Realization of AGC for OFDM Low Power Line Communication System HE Shiblao
Institution:YANG Mi ZHANG Qlng XI Yarning ( College of Communication Engineering, Chongqing University, Chongqing 400044 )
Abstract:An adaptive Automatic Gain Control (AGC) strategy is proposed because of the great channel attenuation of Low Power Line Communication and the transmition of signal being discrete in burst-mode OFDM system. In this strategy, after synchronous detection, the increasing coefficient is controlled by the energy of one symbol in preamble. At last, this strategy is applied to the G3-PLC system, implemented in FPGA. The simulation suggests that the proposed strategy has simple structure, high Convergence speed and stable operation.
Keywords:orthogonal frequency division multiplexing ( OFDM )  power line communication ( PLC )  G3-PLC  automatic gain control (AGC)  field programmable gate array(FPGA)
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