摘要
用复频域 (z域 )分析方法分析二通道滤波器的结构模型 ,提出测定信噪比的算法。与数字 Hilbert滤波器进行比较 ,结果表明 ,在小波域内 ,基于多分辨框架下 ,利用二通道滤波器可实现一般数字滤波器滤波效果。在子带间窜拢可忽略情形下 。
For more denoising,a model structure of two canal filter is analyzed in terms of the complex frequency domain (Z domain),and a algorithm for denoising is developed. In comparison with the digital Hilbert filter, the similar filtering result was obtained with two canal filter in the framework of MRA in the wavelet domain. This two canal filter could be employed in multi layer situation, if the interference among subbands is ignore.
出处
《广西科学》
CAS
2001年第3期180-183,共4页
Guangxi Sciences
关键词
数字滤波
数字滤波器
小波域
滤波器组
信号处理
digital filters, digital Hilbert filters, wavelet domain, group of filters
