Effect of AD Converter saturation on SAR system performance

Author

Zhou Li ; Chunsheng Li ; Ze Yu ; Yan Wang

Author_Institution

Sch. of Electron. & Inf. Eng., BeiHang Univ., Beijing, China

fYear

2013

fDate

23-27 Sept. 2013

Firstpage

333

Lastpage

335

Abstract

Because of the target scattering characteristics are unpredictable, AD Converter is saturated sometimes. Typically, AD Converter saturation distortion is considered as a noise which is similar to quantization. the power of AD Converter saturation equal to the square value of the difference between input analog value and the reconstruction digital level. However, the effect of AD Converter saturation on SAR system performance is not decided by the power of lost signal. In this paper, by discussing a model of two-point, the effects of AD Converter saturation on SAR system performance using LFM signal were analyzed. It was proposed that AD Converter saturation can cause generation of false target and increase of sidelobe energy in SAR image.

Keywords

analogue-digital conversion; distortion; electromagnetic wave scattering; image sampling; quantisation (signal); radar imaging; AD converter saturation distortion; LFM signal; SAR image; SAR system performance; false target generation; quantization; target scattering characteristics; Frequency-domain analysis; Harmonic analysis; Mathematical model; Noise; Power harmonic filters; Quantization (signal); Synthetic aperture radar;

fLanguage

English

Publisher

ieee

Conference_Titel

Synthetic Aperture Radar (APSAR), 2013 Asia-Pacific Conference on

Conference_Location

Tsukuba

Type

conf

Filename

6705082