摘要
目前探地雷达频率波数偏移算法中插值运算涉及复数运算,且对所有频率波数域内的数据进行运算,易引起复数寄生量和计算量大的问题。由此在分析离散余弦变换特点的基础上,引入离散余弦变换代替傅里叶变换用于频率波数偏移算法,以实变换代替复数变换,解决复数寄生量的问题;利用离散余弦变换能量集中的性质,仅对部分主要的离散余弦分量对应的数据进行插值偏移处理,减少计算复杂度以实现插值算法优化。实测数据表明,该文所提的优化方法效果明显。
Fourier transform is usually used in the domain of frequency-wave number transformation in ground penetrating radar.But the interpolation algorithm needs all the data in the domain of frequency migration.So discrete cosine transform（DCT） is presented to replace Fourier transform to do migration.According to the character of the concentration of energy of DCT,the interpolition processing is applied only to the data related with main components on DCT in the domain of frequency.Test result shows that DCT can be a good substitute to Fourier transform and suggested optimization algorithm has less computation and no plural parasitic data.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2012年第1期21-24,共4页
Journal of University of Electronic Science and Technology of China
关键词
算法优化
离散余弦变换
频率波数偏移
探地雷达
algorithm optimization
discrete cosine transform
frequency-wave number migration
ground penetrating radar
