Ye-Jiang SONG, Zhen-Mao CUI, Jian-Fei AN, Yang YU, Bin-Bin CHENG. Grating-lobes suppression methods based on coherence factor for terahertz sparse array [J]. Journal of Infrared and Millimeter Waves, 2020, 39(4): 434
- Journal of Infrared and Millimeter Waves
- Vol. 39, Issue 4, 434 (2020)
Fig. 1. Architecture of 340 GHz imaging system
Fig. 2. Definition of the radar coordinate
Fig. 3. Sparse array schematic diagram
Fig. 4. PSF simulation results of range and azimuth
Fig. 5. Schematic diagram of multi-channel echo coherence at the main lobe
Fig. 6. Schematic diagram of multi-channel echo coherence at the grating lobe
Fig. 7. (a)The simulation imaging results of range dimension; (b) The simulation imaging results of azimuth dimension
Fig. 8. The simulation imaging results of point target (a) the imaging result of BP algorithm, (b) the image weighted by CF, (c) the image weighted by PCF, (d) the image weighted by SCF
Fig. 9. The imaging results of metal ball (a) the imaging result of BP algorithm, (b) the image weighted by CF, (c) the image weighted by PCF, (d) the image weighted by SCF
Fig. 10. The imaging results of fake gun (a) optical picture of the imaging target, (b) the imaging result of BP algorithm, (c) the image weighted by CF, (d) the image weighted by PCF, (e) the image weighted by SCF
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Table 1. 成像性能表征参数对比
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