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| Impact of Frequency Domain Window-adding for the Ramp Filter on Image Reconstruction |
| QIAO Zhi-wei |
| School of Electronics and Computer Science and Technology, North University of China, Taiyuan, Shanxi 030051, China |
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Abstract The performance of the ramp filter has an important influence on image reconstruction. The design method of frequency domain window-adding is the main method. Four classical window-adding filters were designed, which are RL filter, SL filter, Hamming window filter and exponent window filter. The four filters characteristics were analyzed using the unit impulse response and frequency response. The four filters were compared from the frequency response side and the sidelobe attenuation rate side. Theoretical analysis and simulation results show that the vibration noise of the exponent window filter is minimum and the SL filter is optimal as a whole.
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2014, Vol. 35 
