Compact lowpass filter with sharp roll-off and wide stopband using dual-stepped impedance resonator.
ZeBao DuHao YangHaiying ZhangMin ZhuPublished in: Sci. China Inf. Sci. (2014)
Keyphrases
- low pass
- high pass
- bandpass
- filter design
- high frequency
- nonlinear filters
- gaussian filter
- filter responses
- subband
- finite impulse response
- perfect reconstruction
- filter bank
- frequency domain
- low frequency
- wavelet transform
- discrete wavelet transform
- frequency response
- contrast enhancement
- wavelet decomposition
- fir filters
- high quality
- subband coding
- computationally efficient
- image enhancement
- feature vectors
- histogram equalization
- multiresolution
- microstrip
- feature extraction
- feature selection