摘要
为了能够有效抑制窄带干扰,根据小波包具有任意多尺度分解的特性,以及在时、频域具有表征信号局部信息和捕捉干扰信号特征的能力,利用小波包分析技术提取和滤除干扰分量,从间断窄带干扰和持续窄带干扰两种情况着手,进行除噪并重构信号,改善信号性能,提高了信噪比。利用仿真结果,说明了小波包抑制窄带干扰的有效性。
Wavelet packet transform can provide multi-scale time-frequency detail for both signal and interference. In order to reject narrowband interference, wavelet packet analysis together with reconstruction are used for denoising study to improve signal performance. It is proved to be effective through a simulation example of denoising in the presence of both discontinuous and continuous narrow band interference.
出处
《信息与电子工程》
2006年第6期448-453,共6页
information and electronic engineering
关键词
小波包
小波包分解
小波包重构
窄带干扰
抑制
wavelet packet
wavelet packet decomposition
wavelet packet reconstruction
narrowband interference
rejection
