基于子频带性能分析的小波包树选择性研究

Optimal Wavelet Packet Tree with Performance of Subchannels

该文基于小波包调制系统在不同信道中各子带的传输性能的研究,从信道对小波包调制系统传输性能影响的角度,利用对满树调制结构的剪枝合并,探讨与频率选择性信道相匹配的小波包调制结构。仿真表明所选择的小波包树结构,不仅保证了小波包调制系统的传输性能,具有更简单的结构模式,而且具备数据多速率传输的特性。

In this paper,the bit error rate(BER) performance of the subchannels of wavelet packet modulation(WPM) in different channel types is analyzed.Based on analysis of channel character,an optimum wavelet packet tree in the frequency selective fading(FSF) channel is achieved by implementing tree pruning for the full wavelet packet tree.The simulation results indicate that this optimum wavelet packet tree has good BER performance and simple structure,as well as has the multirate diversity.