摘要
提出了一种基于小波多速率调制的小波包优选树提取简易算法。该算法在不增加传输系统复杂度的条件下,通过发送训练序列,并计算各个小波树分支解调信号的均方误差,从而确定最佳树优选分解。仿真结果表明,通过优选树算法,在小波传输频带确定的情况下,可以在特定信道下,有效确定小波多速率调制的最佳树分解结构,降低系统接收误码率。
A kind of simplized algorithm of optimal wavelet packet best-tree acquisition for wavelet-based multi-rate modulation was put forward, without increasing the complexity of the transform system. By the method of transforming training sequences and calculating the mean square error of the demodulated signal in each subband branch, the optimal wavelet packet best-tree could be decided. The simulation shows that the algorithm can detect the optimal wavelet packet best-tree and reduce the bit error ratio in special signal channel.
出处
《系统仿真学报》
EI
CAS
CSCD
北大核心
2007年第20期4759-4761,共3页
Journal of System Simulation
基金
国家空间微波技术实验室基金(51473030105JB3201)
关键词
小波包
优选树
最小均方误差
误码率
wavelet packet
optimal wavelet packet best-tree
least mean square
bit error ratio
