摘要
提出了一种用于电力线OFDM系统的新的盲信道估计方法。基于因果信号实部与虚部之间的希尔伯特变换关系,推导出信道频率响应的幅度-相位约束关系。基于信道频率响应的幅度-相位约束关系,该算法首先对信道的幅频响应进行估计,然后由幅频响应估计相频响应,最后得到完整的信道频率响应。与基于训练序列的估计方法进行比较,计算机仿真表明了该算法对电力线信道的有效性。
A new blind channel estimation method for power line OFDM systems is proposed.The ampli-tude-phase constraint relation of channel frequency response is derived from the Hilbert transform relation between the real and imaginary parts of the casual signal.Based on the amplitude-phase constraint relation,firstly,the ampli-tude-frequency response is estimated,then the phase-frequency response is estimated by the amplitude-frequency re-sponse,and finally,the full channel frequency response is obtained.Compared with the training based estimation method,the computer simulation results show the effectiveness of our proposed method for power line channel.
出处
《电子测量与仪器学报》
CSCD
2011年第6期512-515,共4页
Journal of Electronic Measurement and Instrumentation
基金
华为技术有限公司项目(编号:H04010201W0206102)资助项目
关键词
电力线通信
盲估计
信道估计
正交频分复用
power line communication
blind estimation
channel estimation
OFDM
