针对串行通信过程中常用的CRC校验,在Xilinx ISE 10.1中采用IP核建立RAM,用以存入16 bit CRC校验余式表中的CRC校验码,采用VHDL语言完成了16 bit CRC校验查表法的设计。基于Xilinx公司ChipScope Pro Analyzer虚拟逻辑分析仪,对其进行在...针对串行通信过程中常用的CRC校验,在Xilinx ISE 10.1中采用IP核建立RAM,用以存入16 bit CRC校验余式表中的CRC校验码,采用VHDL语言完成了16 bit CRC校验查表法的设计。基于Xilinx公司ChipScope Pro Analyzer虚拟逻辑分析仪,对其进行在线逻辑分析,验证了设计的可行性,并在实际应用中得以实现,且表现出良好的稳定性和准确性。展开更多
The current exact Rayleigh scattering calculation of ocean color remote sensing uses the look-up table （LUT）, which is usually created for a special remote sensor and cannot be applied to other sensors. For practica...The current exact Rayleigh scattering calculation of ocean color remote sensing uses the look-up table （LUT）, which is usually created for a special remote sensor and cannot be applied to other sensors. For practical application, a general purpose Rayleigh scattering LUT which can be applied to all ocean color remote sensors is generated. An adding-doubling method to solve the vector radiative transfer equation in the plane-parallel atmosphere is deduced in detail. Compared with the exact Rayleigh scattering radiance derived from the MODIS exact Rayleigh scattering LUT, it is proved that the relative error of Rayleigh scattering calculation with the adding-doubling method is less than 0.25%, which meets the required accuracy of the atmospheric correction of ocean color remote sensing. Therefore, the adding-doubling method can be used to generate the exact Rayleigh scattering LUT for the ocean color remote sensors. Finally, the general purpose exact Rayleigh scattering LUT is generated using the adding-doubling method. On the basis of the general purpose LUT, the calculated Rayleigh scattering radiance is tested by comparing with the LUTs ofMODIS, SeaWiFS and the other ocean color sensors, showing that the relative errors are all less than 0.5%, and this general purpose LUT can be applied to all ocean color remote sensors.展开更多
文摘针对串行通信过程中常用的CRC校验,在Xilinx ISE 10.1中采用IP核建立RAM,用以存入16 bit CRC校验余式表中的CRC校验码,采用VHDL语言完成了16 bit CRC校验查表法的设计。基于Xilinx公司ChipScope Pro Analyzer虚拟逻辑分析仪,对其进行在线逻辑分析,验证了设计的可行性,并在实际应用中得以实现,且表现出良好的稳定性和准确性。
基金supported by the National Natural Science Foundation of China under contract No.40506036the High Tech Research and Development"863"Program of China under contract No.2003AA131160-04the Science and Technology Plan of Zhejiang Province of China under contract Nos 2004E60054 and 2004C13027.
文摘The current exact Rayleigh scattering calculation of ocean color remote sensing uses the look-up table （LUT）, which is usually created for a special remote sensor and cannot be applied to other sensors. For practical application, a general purpose Rayleigh scattering LUT which can be applied to all ocean color remote sensors is generated. An adding-doubling method to solve the vector radiative transfer equation in the plane-parallel atmosphere is deduced in detail. Compared with the exact Rayleigh scattering radiance derived from the MODIS exact Rayleigh scattering LUT, it is proved that the relative error of Rayleigh scattering calculation with the adding-doubling method is less than 0.25%, which meets the required accuracy of the atmospheric correction of ocean color remote sensing. Therefore, the adding-doubling method can be used to generate the exact Rayleigh scattering LUT for the ocean color remote sensors. Finally, the general purpose exact Rayleigh scattering LUT is generated using the adding-doubling method. On the basis of the general purpose LUT, the calculated Rayleigh scattering radiance is tested by comparing with the LUTs ofMODIS, SeaWiFS and the other ocean color sensors, showing that the relative errors are all less than 0.5%, and this general purpose LUT can be applied to all ocean color remote sensors.
