中文摘要：

低压电力线通信为智能电网、智能家居以及＂最后一公里＂提供了高效可靠的信息传输方案。然而,受电力线通信信道环境不理想的影响,数字信号传输到接收端时会有大量的噪声存在,这将造成误码率提高,甚至导致通信中断。针对此问题,结合认知无线电技术,提出了一种基于部分可观察马尔可夫决策过程（POMDP）的信道认知接入方案。仿真结果表明,该方案能够有效避开噪声,提高数据传输的可靠性和有效性,同时也提高了优质频谱的利用率。

英文摘要：

Low voltage power line communication provides high efficient and reliable information transmission scheme for the smart grid,smart home and ＂ The last one kilometer＂. However,affected by the unsatisfactory channel environment of power line communication,when the digital signal is transmitted to the receiving end,lot of noise may exist,which will cause the error rate increased,even the communication may be interrupted. Aiming at this problem,combining with the cognitive radio technology,the channel cognitive access scheme based on partially observable Markov decision process（ POMDP） is proposed. The simulation results show that the scheme can avoid the noise effectively,improve the reliability and validity of data transmission,and also enhance the utilization rate of high quality spectrum.