【摘要】 信道估计是正交频分复用(orthogonal frequency division multiplexing,OFDM)技术中数据解调与均衡的基础。文章在分析电力线信道特性的基础上,针对电力线信道的非线性畸变对数据传输准确率的影响,提出采用基于模糊模型的滤波器来估计信道模型。仿真结果表明,所设计的H∞滤波器与OFDM通信技术相结合能够有效消除或降低电力线信道中存在的噪声干扰、码间干扰和信道间干扰。更多还原

【Abstract】 Channel estimation is the basis of data demodulation and equalization in Orthogonal Frequency Division Multiplexing(OFDM) technology. In this paper,on the basis of analyzing the channel characteristics of power line communication and according to the impact of nonlinear distortion of power line channel on data transmission accuracy,it is proposed to estimate channel model by the filter based on fuzzy model. Simulation results show that the integration of the designed H∞ filter with OFDM technology can effectively eliminate or lower the noise interference,inter-symbol interference and inter-channel interference existing in power line channels.更多还原