Strong Spurious Noise Suppression for an FMCW SAR
| Autor: | Wenge Chang, H. Tian, Z. H. Liu, X. Y. Li |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Synthetic aperture radar
Image quality Acoustics Fast Fourier transform 0211 other engineering and technologies 02 engineering and technology Synthetic Aperture Radar 01 natural sciences 010305 fluids & plasmas strong spurious noise Computer Science::Hardware Architecture Interference (communication) miniaturized system 0103 physical sciences Electronic engineering noise suppression Electrical and Electronic Engineering Field-programmable gate array Spurious relationship 021101 geological & geomatics engineering Physics Synthetic Aperture Radar (SAR) Frequency Modulated Continuous Wave (FMCW) Frequency Modulated Continuous Wave Noise FMCW Continuous wave lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:TK1-9971 SAR |
| Zdroj: | Radioengineering. 2016 vol. 25, č. 3, s. 581-591. ISSN 1210-2512 Radioengineering, Vol 25, Iss 3, Pp 581-591 (2016) |
| ISSN: | 1210-2512 |
| DOI: | 10.13164/re.2016.0581 |
| Popis: | To meet the miniature requirement, a frequency modulated continuous wave synthetic aperture radar (FMCW SAR) puts tight constraint on the compactness, which causes the interference of narrow band noise. The aim of this study is to suppress the strong noise for an FMCW SAR. First, the quantitative analysis of the noise is performed. It is found that a strong spurious noise of the analog-to-digital converter (ADC) is introduced from interferences and significantly affects the image quality; the other noise components are sufficiently small, thus having ignorable influences. Then, a Fast Fourier Transform (FFT) based method of noise suppression is proposed to eliminate the ADC strong spurious noise, adopting an ADC and a field programmable gate array (FPGA). Finally, using the real Ku-band FMCW SAR data, the level of the noise components is measured and the effectiveness of the proposed noise suppression method is validated. The results show that the measured noise level coincides with the theoretical noise level, and the proposed noise suppression method effectively eliminates the ADC strong spurious noise. |
| Databáze: | OpenAIRE |
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