综合孔径微波辐射计二阶量化数字相关器研究

1-Bit Digital Correlator for Synthetic Aperture Microwave Radiometer

微波辐射计作为一种无源遥感器 ,在遥感技术领域有着巨大的应用前景 .传统的微波辐射计的空间分辨率受到天线孔径的限制 .综合孔径微波辐射计利用了干涉测量原理和复相关技术 ,是一种可以有效地提高空间分辨率的新型辐射计 .本文针对综合孔径微波辐射计的数字相关器进行了深入研究 ,分析论证了二阶量化数字相关器的工作机理 ,并对采用该种相关器的系统的信噪比进行了分析 .

Microwave radiometer,as a passive remote sensing instrument,has broad application potential.However,these were limited by its spatial resolution given by its physical antenna aperture size.A synthetic aperture technology employing interferometry principle with complex correlators has been considered as a new type of instrument to give improved spatial resolution.In this paper,the authors analyzed the properties of a 1 bit digital correlator.The signal to noise performance has also been given to the systems that use this technology.Preliminary tests of such a system shows that it is a considerable technology to improve the system characteristic using the traditional analog complex correlators.