Enhanced GNSS-SAR Range-Doppler Algorithm for The Target Detection of Weak Reflected Signals: An Experimental Study

• DOI: 10.6125/17-0109-921
• Publication Date: 2017-06-01
• Authors: Yu Zheng; Yang Yang; Wu Chen
• Keywords: SIGNAL (programming language)

A new tool for remote sensing GNSS-SAR is developing recently. However, due to the limitation of narrow signal band GNSS signals, images generated by are much noisy and with low azimuth resolution, particularly when reflected signals weak. Due issue, a algorithm proposed target detection based on Range- Doppler in this paper. Firstly, according analysis average SNR (signal-to-noise ratio) received signal, optimal threshold range correlation duration derived detecting compressed signal. Thereafter properly scaling detected along domain, we can further enhance specified direction. Thus, conducting processing, resolution be improved. In paper, algorithms will described experiment results presented.