摘要
针对自适应正交频分复用(orthogonal frequency division multiplexing,OFDM)系统中线性最小均方误差(linear minimum mean square error,LMMSE)算法复杂度高、数据传输速率低问题,采用改进LMMSE算法对配电网信道状态进行了信道估计,通过和LMMSE算法对比,该改进LMMSE的计算复杂度相比LMMSE算法已大大地降低,在配电网信道估计的时间上节省8 s,大大缩短了信道估计的时间。
It is very key to correctly estimate channel state of electric power lines in view of complicated characteristic of communication network structure of electric power lines. Aiming at problems of high complexity of linear minimum mean square error algorithm and low data transmission rate in orthogonal frequency division multiplexing system,this paper intro-duces channel estimation on channel state of distribution network by using improve LMMSE algorithm. Compared with LMMSE algorithm,this improved LMMSE algorithm was proved to be with low calculation complexity which was able to save 8 s of channel estimation time and greatly shorten channel estimation time.
出处
《广东电力》
2014年第8期46-49,共4页
Guangdong Electric Power
关键词
自适应
正交频分复用技术
信道估计
线性最小均方误差算法
self-adaptive orthogonal frequency division multiplexing channel estimation linear minimum mean square er-ror
