摘要
基于小波变换的OFDM是小波理论与OFDM技术相结合而产生的一种新的多载波调制技术。利用了小波函数的非零平移自正交性和强频谱带限能力等优势。介绍这种技术的基本原理,仿真该技术在瑞利衰落信道下的性能,并与传统的OFDM技术进行比较。在低信噪比下,DWT-OFDM技术的性能要明显优于传统的OFDM技术。
Wavelet-based OFDM is a new muhicarrier modulation which combines wavelet theory with OFDM technology. It makes use of the advantages of wavelets such as nonzero translation self-orthgonality, good stop-band attenuation results and so on. The basic theory of DWT-4OFDM is introduced. The performance in rayleigh fading channel is simulated, then compared with traditional OFDM. In low SNR, the performance of DWT-OFDM is obvi- ously better than traditional OFDM.
出处
《科学技术与工程》
2009年第16期4641-4644,共4页
Science Technology and Engineering
