NISAR L-band digital electronics subsystem: A multichannel system with distributed processors for digital beam forming and mode dependent filtering
| Autor: | N. Niamsuwan, Eric Liao, Chung-Lun Chuang, Vu Duong, Ken Vines, Barry Volain, S. Shaffer, C. Lim, Muh-Wang Yang, Samuel Li, K. Wheeler |
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| Rok vydání: | 2016 |
| Předmět: |
Synthetic aperture radar
Digital electronics Engineering Digital signal processor business.industry Firmware 0211 other engineering and technologies 02 engineering and technology computer.software_genre Signal Electronic engineering Digital signal business computer Digital signal processing 021101 geological & geomatics engineering Communication channel |
| Zdroj: | 2016 IEEE Radar Conference (RadarConf). |
| Popis: | The NASA-ISRO Synthetic Aperture Radar (NISAR) L-band SAR instrument employs multiple digital channels to optimize resolution while keeping a large swath on a single pass. High-speed digitization with fine synchronization and digital beam forming are necessary in order to facilitate this new technique called SweepSAR. An architecture employing multiple FPGA based digital signal processors has been conceived to facilitate digital calibration on an individual channel basis as well as digital signal processing to optimize the receive signal. On-board processing and data compression has been implemented to reduce the volume of data in order to satisfy the operational requirements of near global coverage for the desired science targets. A novel command and timing architecture was developed to manage this complex system to meet the challenging project requirements. The NISAR L-band Digital Electronics Subsystem is the combination of the hardware, firmware and software components architected and implemented to operate this radar and return the desired quantity and quality of data for the science community. |
| Databáze: | OpenAIRE |
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