摘要
电力线通信技术是具有良好发展前景的一种宽带接入方式,但是噪声干扰严重,通信环境恶劣,正交频分复用是解决电力线通信问题的有效方法。文章运用Simulink建立了基于时间流的电力线通信信道模型和OFDM基带通信模型。通过对电力线信道模型下的采用OFDM的通信系统模型进行仿真验证,结果表明可以通过适当的编码和调制方式来提高系统的可靠性,并定性地分析了编码和误码率、调制方式和误码率之间的关系。
Power line communication is a kind of wide band access methods with optimistic prospect, but it＇s also have serious noise and poor communication environment. Orthogonal frequency division multiplexing（OFDM） is an effective method to solve this power line communication problem. This paper constructed the power line communication channel model and baseband transmission model of OFDM based on time-flow by using Simulink. Through simulating the OFDM communication system model under power line channel, it is shown that reliability of the system can be improved by appropriate encode and modulation, and we qualitatively analysis relation between encode and BER.relation between modulation and BER.
出处
《计算机与数字工程》
2011年第9期41-43,104,共4页
Computer & Digital Engineering
