摘要
空时编码是一种用于多发射天线的编码技术。该编码在多根发射天线和各个时间周期的发射信号之间能够产生空间域和时间域的相关性,从而使接收端克服多输入多输出(MIMO)信道衰落问题,并降低了发射误码率。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。基于正交频分复用(OFDM)技术,利用三相电力线MIMO技术实现了空时编码在电力线载波通信中的应用以及最大分集增益,较好地降低了误码率。
Space time coding is the coding technology that used in multiple transmits antennas. This technology can produce the correlation among transmitted signals of multiple transmitting antennas and each time period in both spatial domain and time domain, thus the MIMO channel fading is overcome at the receiving end, and the transmitting error rate is reduced. Because of the particularity of the power line channel; the fading characteristics are similar to the multiple antenna wireless channel. Based on orthogonal frequency division multiplexing （OFDM） technology, and by adopting three-phase power line MIMO technology, the application of space time coding in power line carrier communication is implemented with features of maximum diversity gain and lower error code rate.
出处
《自动化仪表》
CAS
北大核心
2013年第9期16-18,共3页
Process Automation Instrumentation
关键词
空时编码
多入多出技术
电力线
载波通信
智能电网
Space time coding Multiple input multiple output technology Power line Carrier communication Smart grid
