The frequency-modulated continuous-wave （FMCW） synthetic aperture radar （SAR） is a light-weight, cost-effective, high-resolution imaging radar, which is suitable for a small flight platform. The signal model is de...The frequency-modulated continuous-wave （FMCW） synthetic aperture radar （SAR） is a light-weight, cost-effective, high-resolution imaging radar, which is suitable for a small flight platform. The signal model is derived for FMCW SAR used in unmanned aerial vehicles （UAV） reconnaissance and remote sensing. An appropriate algorithm is proposed. The algorithm performs the range cell migration correction （RCMC） for continuous nonchirped raw data using the energy invariance of the scaling of a signal in the scale domain. The azimuth processing is based on step transform without geometric resampling operation. The complete derivation of the algorithm is presented. The algorithm performance is shown by simulation results.展开更多
The concept of the concentrated slowly decreasing dispersion management soliton（CSDDMS） is explained, and the nonlinear Shroedinger equation （NSE） of the soliton propagation in the total internal reflective photon...The concept of the concentrated slowly decreasing dispersion management soliton（CSDDMS） is explained, and the nonlinear Shroedinger equation （NSE） of the soliton propagation in the total internal reflective photonic crystal fiber （TIRPCF） under the multi-photon nonlinear Compton scattering is given. Through solving of this equation using the Fourier transform by step, it is found that under certain conditions, the soliton couple becomes into the quasi-solitons, whose amplitudes and widths are slowly and periodically changed, but there is any collision. A new method to eliminate the split and deformation of the optical soliton in the TIRPCF using the CSDDMS is proposed.展开更多
文摘The frequency-modulated continuous-wave （FMCW） synthetic aperture radar （SAR） is a light-weight, cost-effective, high-resolution imaging radar, which is suitable for a small flight platform. The signal model is derived for FMCW SAR used in unmanned aerial vehicles （UAV） reconnaissance and remote sensing. An appropriate algorithm is proposed. The algorithm performs the range cell migration correction （RCMC） for continuous nonchirped raw data using the energy invariance of the scaling of a signal in the scale domain. The azimuth processing is based on step transform without geometric resampling operation. The complete derivation of the algorithm is presented. The algorithm performance is shown by simulation results.
基金Natural Science Foundation from Depart ment of Education of Henan Province Science and TechnologyDevelopment Foundation from Depart ment of Science and Technology of Zhumadian City(058002)
文摘The concept of the concentrated slowly decreasing dispersion management soliton（CSDDMS） is explained, and the nonlinear Shroedinger equation （NSE） of the soliton propagation in the total internal reflective photonic crystal fiber （TIRPCF） under the multi-photon nonlinear Compton scattering is given. Through solving of this equation using the Fourier transform by step, it is found that under certain conditions, the soliton couple becomes into the quasi-solitons, whose amplitudes and widths are slowly and periodically changed, but there is any collision. A new method to eliminate the split and deformation of the optical soliton in the TIRPCF using the CSDDMS is proposed.
