The Performance Analysis of Direct Sampling Microwave Radiometer

摘要：

L-band direct sampling digital total power microwave radiometer (DSDTPMR) is a novel radiometer,which trades analog complexity for digital ditto.This article considered the Low Noise Amplifier (LNA) gain fluctuation,analog-to-digital converter (ADC) sampling rates and quantization resolution,to derive a general mathematical expression of sensitivity of the DSDTPMR; Analyzed the influence of sampling rate,quantization on sensitivity of DSDTPMR;The simulation result indicating,when the sampling frequency is bigger than two times of signal bandwidth,the multi-bit quantization resolution has very small effect on the sensitivity; When the gain fluctuation obeys the Gaussian distribution,the gain fluctuation may reduce to √N times.

关键词： direct sampling microwave radiometer sensitivity

作者: Zhu Lu Hu Fei Li Qingxia Zhu Yaoting

作者单位: Dept.of Electronics and Information Engineering,Huazhong University of Science and Technology,Wuhan Dept.of Electronics and Information Engineering,Huazhong University of Science and Technology,Wuhan

会议类型: 国际会议

会议名称: 2008 International Conference on Microwave and Millimeter Wave Technology(2008国际微波毫米波技术会议)

会议地点: 南京

会议语种:英文

页码: 814-817

在线出版日期: 2008-04-21（万方平台首次上网日期，不代表论文的发表时间）