基于小波变换/小波包变换的多载波调制技术

Multicarrier Modulation Based on Wavelet/Wavelet Packet Transform

小波/小波包在通信系统中的应用是近年来一个新的研究领域,而基于小波/小波包变换的多载波调制技术是其中一大研究热点。由于小波/小波包基函数具有良好的正交性与时频局域性等特点,基于小波/小波包变换的多载波调制技术,能够有效地提高通信系统性能。本文介绍了当前几种主要的基于小波/小波包变换的多载波调制方案,分析了这些方案的性能特点及发展趋势,并与其他方案进行了比较。

The applications of wavelets and wavelet packets in communication have drawn a lot of attention in recent years, among which multicarrier modulation based on wavelet/wavelet packet transform has been proposed and intensively explored. It can improve the performance of communication systems effectively, owing to the good properties of wavelets and wavelet packets such as orthogonality and time-frequency localization. In this paper, some main schemes of multicarrier modulation based on wavelet/wavelet packet transform are presented, with an analysis of their performances and trends, comparing to other modulation schemes.