基于小波变换的OFDM与传统OFDM在电力线信道下的性能对比

Performance Comparison of WOFDM and Conventional OFDM under Power Line Channels

对比基于小波变换的OFDM和传统OFDM在高斯白噪声、多径效应、脉冲干扰和窄带干扰下的性能,从而得出更适合电力线通信的调制解调方式。仿真结果表明,在高斯白噪声和多径信道下,两系统的误码性能基本相同。在时域脉冲干扰影响下,传统OFDM性能更好;在频域脉冲干扰和窄带干扰影响下,基于小波变换的OFDM性能更好。

The performance of WOFDM and conventional OFDM under AWGN are compared, multi-path effect, impulse disturbance and narrow band interference to decide which method is more appropriate for power line communications. The simulation result shows that under AWGN and multi-path effect the two methods exhibit the similar performance. Conventional OFDM outperforms WOFDM under the impulse disturbance in time domain. But WOFDM turns out better in the presence of the impulse disturbance in frequency domain and narrow band interference.