Title :
Optimal Tree Design for Wavelet Packet Modulation Based on Adaptive Least Mean Square Algorithm
Author :
Zhong Weizhi ; Guo Qing ; Yan, Guo ; Guo Yan
Author_Institution :
Commun. Res. Center, Harbin Inst. of Technol., Harbin
Abstract :
The design of wavelet packet tree (WPT) is a crucial part of optimal wavelet packet modulation (WPM) system. This paper presents a new method for optimizing the WPT based on the adaptive least mean square (LMS) algorithm for WPM. The proposed algorithm decreases the effect of inter-symbol interference (ISI) and inter-carrier interference (ICI), tracks the channel variation by changing the trees structures. Theoretical analyses and simulation results show that the proposed method has a good performance in reducing the multiplicative noise and it is suitable for tracking the channel variation accurately in real-time.
Keywords :
intersymbol interference; least mean squares methods; modulation; trees (mathematics); wavelet transforms; wireless channels; adaptive least mean square algorithm; channel variation; inter-carrier interference; inter-symbol interference; multiplicative noise; optimal tree design; optimal wavelet packet modulation system; trees structures; wavelet packet tree; Algorithm design and analysis; Analytical models; Intersymbol interference; Least mean square algorithms; Least squares approximation; Noise reduction; Optimization methods; Performance analysis; Tree data structures; Wavelet packets;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2008. WiCOM '08. 4th International Conference on
Conference_Location :
Dalian
Print_ISBN :
978-1-4244-2107-7
Electronic_ISBN :
978-1-4244-2108-4
DOI :
10.1109/WiCom.2008.404
