摘要
DWT比DFT在子信道间有更高的频谱约束力,可以去除COFDM(编码正交频分复用)系统中必须的CP(循环前缀),从而提高带宽利用率。对不同小波下CWOFDM(编码小波正交频分复用)系统在无线信道下的传输性能进行仿真。结果表明,CWOFDM系统抗噪声和多径衰落性能优于COFDM,而且小波的滤波器长度和分解层数都会影响CWOFDM系统抗噪声和多径衰落的性能。
Due to discrete wavelet transform, which can eliminate CP that is a must in COFDM system ,thus improving BW efficiency, has higher spectral containment among sub channels than DFT. We simulate and analysis the performance of CWOFDM system based on different wavelet bases transform on various wireless channels. Results show that the filter effective length of different wavelets and different decomposition scales of the same wavelet will influence the performance of the CWOFDM system with antinoise and anti muhipath fading.
出处
《电子技术应用》
北大核心
2009年第2期117-120,共4页
Application of Electronic Technique
