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Study of the Real-Time Onboard Radio Frequency Interference Detection and Mitigation Strategy for MICAP L-Band Radiometer
IEEE Transactions on Geoscience and Remote Sensing ( IF 8.2 ) Pub Date : 2022-09-12 , DOI: 10.1109/tgrs.2022.3205963 Tianshu Guo 1 , Xi Guo 2 , Hao Liu 3 , Donghao Han 3 , Cheng Zhang 3 , Changxing Huo 3 , Yueying Tang 3 , Lijie Niu 3 , Gang Li 2 , Ji Wu 3
IEEE Transactions on Geoscience and Remote Sensing ( IF 8.2 ) Pub Date : 2022-09-12 , DOI: 10.1109/tgrs.2022.3205963 Tianshu Guo 1 , Xi Guo 2 , Hao Liu 3 , Donghao Han 3 , Cheng Zhang 3 , Changxing Huo 3 , Yueying Tang 3 , Lijie Niu 3 , Gang Li 2 , Ji Wu 3
Affiliation
Microwave imager combined active and passive (MICAP), which is a package of active and passive microwave instruments including L/C/K-band radiometers and L-band scatterometer, has been chosen as one of the primary payloads for the Chinese Ocean Salinity Mission (COSM). The L-band 1-D synthetic aperture radiometer (L-Rad) is the key part of MICAP to measure sea surface salinity (SSS). As radio frequency interference (RFI) has been reported as a severe threat to L-band radiometry, it can be foreseen that MICAP L-Rad will encounter RFI contaminations unavoidably. Due to the conflict between the huge transmission data volume and the limited downlink budget, it is challenging for MICAP L-Rad to transmit all rapidly sampled subband data products and conduct on-ground RFI processing like Soil Moisture Active Passive (SMAP) microwave radiometer. The onboard real-time RFI detection and mitigation strategy is proposed accordingly for MICAP L-Rad. It is designed based on the distributed digital processing structure and the synthetic aperture feature. The proposed RFI processing strategy is evaluated and verified by the system simulations and hardware experiment, demonstrating its RFI detection capability and low false alarm rate performance.
更新日期：2022-09-12
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