Back to Search
Start Over
Nonlinear Frequency Modulation Signal Generator in LT-1.
- Source :
- IEEE Geoscience & Remote Sensing Letters; Oct2019, Vol. 16 Issue 10, p1570-1574, 5p
- Publication Year :
- 2019
-
Abstract
- Generally, synthetic aperture radar (SAR) system transmits linear frequency modulation (LFM) signal to obtain the high-resolution image and weighted windowing is usually employed to suppress sidelobes. However, it will cause a 1–2-dB signal-to-noise ratio (SNR) loss. Nonlinear frequency modulation (NLFM) signal, which can construct the signal’s power spectral density (PSD) to reduce sidelobes without loss of SNR, is a promising candidate. However, the real-time generation of precise NLFM signal is still a technical challenge. In this letter, a high-precision NLFM signal generator with the ability of predistortion compensation is developed, and this signal generator will be employed in LuTan-1 (LT-1, i.e., TwinSAR-L) mission which is an innovative spaceborne bistatic SAR mission and planned to launch in 2020. In addition, a two-step error compensation method is developed to compensate the system error. Finally, the ground experiment is performed to validate the designed signal generator. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 1545598X
- Volume :
- 16
- Issue :
- 10
- Database :
- Complementary Index
- Journal :
- IEEE Geoscience & Remote Sensing Letters
- Publication Type :
- Academic Journal
- Accession number :
- 138894203
- Full Text :
- https://doi.org/10.1109/LGRS.2019.2905359