Title :
Performance Analysis for Multichannel HRWS SAR Systems Based on STAP Approach
Author :
Taoli Yang ; Zhenfang Li ; Zhiyong Suo ; Yanyang Liu ; Zheng Bao
Author_Institution :
Key Lab. for Radar Signal Process., Xidian Univ., Xi´an, China
Abstract :
Incorporated with digital beam-forming processing, multichannel spaceborne synthetic aperture radar (SAR) systems are able to overcome the minimum antenna area constraint and yield high resolution and wide swath (HRWS) images. This letter mainly investigates the performance of the space-time adaptive processing (STAP) approach applied to HRWS SAR imaging. The analytic expressions for the signal-to-noise ratio (SNR) scaling factor and azimuth ambiguity to signal ratio (AASR) are derived and confirmed by the simulated results. Then, the influence of channel errors on HRWS imaging is analyzed in detail.
Keywords :
radar imaging; remote sensing by radar; synthetic aperture radar; HRWS SAR imaging; SNR scaling factor; STAP approach; channel errors; digital beam-forming processing; high resolution image; multichannel HRWS SAR systems; multichannel spaceborne SAR systems; performance analysis; signal-to-noise ratio; space-time adaptive processing; synthetic aperture radar; wide swath image; Azimuth; Doppler effect; Signal to noise ratio; Spaceborne radar; Synthetic aperture radar; Vectors; Channel error; high-resolution wide-swath (HRWS); multichannel; space–time adaptive processing (STAP); synthetic aperture radar (SAR);
Journal_Title :
Geoscience and Remote Sensing Letters, IEEE
DOI :
10.1109/LGRS.2013.2258889
