摘要
利用小波变换的时频局域性,提出了一种探地雷达信号处理的滤波方法。在连续小波变换的基础上,同时联合尺度和频率,通过能量分析确定回波信号主要分量所在区间,通过尺度分解和频域滤波剔除干扰分量,在此基础上重构信号,提高了信噪比。并针对不同连续小波基对信号处理的性能进行分析,对比结果表明与雷达发射母波相似的小波基在探地雷达信号处理中更有效。
A practical GPR signal process method is proposed by employing wavelet transform characteristic in time domain and frequency domain. Based on continuous wavelet transform, through scale decomposition and frequency filtering, the main component of echo signal is extracted by energy analysis, the disturbed component is eliminated. The SNR of reconstructed echo signal is improved. Meanwhile the method is applied to radar echo signal processing with different mother wavelets, the performance is analyzed, and it indicates that the mother wavelet similar to radar transmit signal is optimum in GPR signal processing.
出处
《电波科学学报》
EI
CSCD
北大核心
2006年第1期140-145,149,共7页
Chinese Journal of Radio Science
基金
上海市科技发展基金项目(015115038)
关键词
连续小波变换
尺度分解
频域滤波
continuous wavelet transform, scaled decomposition, frequency filtering
