摘要
为测得反演海洋风场所需的全部4个Stokes参数,全极化微波辐射计采用多路相关技术,对水平和垂直极化信号进行自相关和互相关处理,是一种全新的微波遥感系统。数字相关器是全极化辐射计的核心部件。详细介绍了一种高速新型数字相关器的设计。4片高速A/D转换器采样4路信号并外接多路复用模块实现高速数据流的降速,然后通过Xilinx公司新一代的FPGA-Ver-tex5芯片作相关运算,将相关结果实时传输至上位机。提出的新型数字相关器可以实现系统最高5GHz带宽的数据处理。
To get the four Stokes vectors and ocean surface fields,fully polarimetric microwave radiometer can adopt multi-channel digital correlation technology including the self-correlation and cross-correlation between the horizontal and vertical polarization signals.Fully polarimetric microwave radiometer is a new-type of microwave remote sensors.Digital correlation is the core part of the system.A novel digital correlation is introduced in this study.Four high-speed A/D converters are used to sample the signals of four channels with the results translated to multiplexers for decelerating.The latest Field-Programmable Gate Array（FPGA）-Virtex5 fabricated by Xilinx has been used to complete the correlation,meanwhile,the results are translated to PC in time.The new-type of correlator can process data with up to 5 GHz bandwidth.
出处
《遥感技术与应用》
CSCD
北大核心
2012年第2期305-309,共5页
Remote Sensing Technology and Application
基金
中国科学院"百人计划"择优支持经费资助
关键词
全极化微波辐射计
数字相关器
数据降速
FPGA
Fully polarimetric microwave radiometer
Digital correlator
Data decelerating
FPGA
