MIMO技术研究及空时编码在电力线通信中的应用

M IMO系统可以大幅度提高无线信道的容量和质量,降低系统成本。多天线技术与编码技术以及OFDM技术相结合,能更大幅度提高信道的容量和可靠性。文章介绍的编码技术包括空时格型码和空时分组码。由于电力线信道的特殊性,其衰落特性类似于多天线无线信道,M IMO中的天线选择算法以及空时编码技术都可以应用到电力线通信中。可以把三相电力线当作天线阵子来使用,并把编码技术应用其中,从而提高电力线通信的信道质量。

Research on MIMO system and the application of space time coding technology in power line communication

The multiple input and multiple output systems can enhance the channel capacity and its quality greatly and reduce the system cost.Combining with the coding and the OFDM technologies,MIMO technology can greatly enhance the reliability and enlarge the capacity of the channel.In this paper,the coding technologies of space time trellis code and the space time packet code are introduced.Because of the particularity of power line,the fading character is similar to the multi-antenna wireless channel.Some of the arithmetic in MIMO and coding technique can be used into power line communications.The paper also points out that the three phase electric power line can be used as antennae array and the coding technology can also be used so as to enhance the channel quality.