SAR pulse radio frequency interference suppression based on modified eigen subspace projection

Mingyue Liu; Gaofeng Shu; Ning Li

doi:10.1117/12.3010351

15 November 2023 SAR pulse radio frequency interference suppression based on modified eigen subspace projection

Mingyue Liu, Gaofeng Shu, Ning Li

Proceedings Volume 12815, International Conference on Remote Sensing, Mapping, and Geographic Systems (RSMG 2023); 128151F (2023) https://doi.org/10.1117/12.3010351
Event: International Conference on Remote Sensing, Mapping, and Geographic Systems (RSMG 2023), 2023, Kaifeng, China

Abstract

Synthetic aperture radar (SAR), as an active microwave remote sensor with high-resolution earth observation, is easily affected by radio frequency interference (RFI). Pulse radio frequency interference (PRFI), as a typical form of RFI, pollutes SAR raw data with bright stripes, which increases the difficulty of SAR image interpretation. However, the conventional eigen subspace projection (ESP) method decomposes the whole pulse into the interferences and the useful signals, resulting in the loss of useful signals in the non-interference positions with the pulse. To solve this problem, this paper proposes an improved SAR PRFI suppression method based on ESP. Firstly, the receiving pulses containing PRFI are detected and the specific position of PRFI in the pulse are determined by eigenvalue decomposition and energy accumulation in time-frequency domain, respectively. Secondly, the PRFI signal is separated from the useful signal by applying the ESP method only to the data where the PRFI is located. Finally, the PRFI signal projected by ESP is eliminated from the raw data. Simulation results shown that the proposed method can better protected useful signals and improve SAR image quality compared with conventional methods.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Mingyue Liu, Gaofeng Shu, and Ning Li "SAR pulse radio frequency interference suppression based on modified eigen subspace projection", Proc. SPIE 12815, International Conference on Remote Sensing, Mapping, and Geographic Systems (RSMG 2023), 128151F (15 November 2023); https://doi.org/10.1117/12.3010351

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KEYWORDS

Synthetic aperture radar

Pulse signals

Electromagnetic coupling

Signal detection

Tunable filters

Frequency modulation

Signal processing

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